WO2023027177A1 - Cd116およびcd131に結合するバイスペシフィック抗体 - Google Patents
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- C07K2317/52—Constant or Fc region; Isotype
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- C12N15/70—Vectors or expression systems specially adapted for E. coli
Definitions
- the present invention provides a bispecific antibody comprising an antigen-binding domain that binds to CD116 and CD131, the bispecific antibody fragment, a DNA encoding the bispecific antibody or the bispecific antibody fragment, a vector comprising the DNA, and the bispecific antibody. or a hybridoma and transformant that produces the bispecific antibody fragment, a method for producing the bispecific antibody or the bispecific antibody fragment, a therapeutic and diagnostic agent containing the bispecific antibody or the bispecific antibody fragment, the bispecific antibody or
- the present invention relates to therapeutic and diagnostic methods using bispecific antibody fragments, and detection or measurement reagents comprising said bispecific antibodies or said bispecific antibody fragments.
- Granulocyte-macrophage colony-stimulating factor is a glycoprotein of approximately 22 kDa consisting of 127 amino acid residues, and acts on myeloid progenitor cells to promote their differentiation and proliferation. is. It is not required for homeostatic hematopoiesis, but is essential for alveolar macrophage differentiation.
- Non-Patent Document 1 In fact, in analyzes using GM-CSF knockout animals, blood cells such as neutrophils, monocytes, and eosinophils were normal, but maturation failure of alveolar macrophages was observed, resulting in abnormal lung surfactant treatment. It has been reported (Non-Patent Document 1).
- GM-CSF exerts its physiological action by specifically binding to the GM-CSF receptor expressed on the cell membrane.
- GM-CSF receptors are expressed on neutrophils, eosinophils, monocytes, macrophages, and their progenitor cells.
- the GM-CSF receptor is a heteromultimer composed of two types of subunits, an ⁇ chain (CD116) and a ⁇ c chain (common ⁇ chain, CD131).
- Both CD116 and CD131 are single transmembrane proteins and belong to the cytokine receptor superfamily. CD116 is responsible for specific binding to GM-CSF, and CD131 is a component molecule common to IL-3 receptor and IL-5 receptor, and is mainly responsible for signal transduction.
- JAK2 a signaling molecule, binds to the intracellular domain of CD131, and phosphorylation of JAK2 and CD131 intracellular domain tyrosine residues activates the JAK2/STAT5, Ras/MAP kinase, and PI-3 kinase pathways. It acts on the survival, proliferation, differentiation, and activation of cells.
- CD116 and CD131 exist separately on the cell membrane.
- CD116 and CD131 act as GM-CSF receptors, GM-CSF first specifically binds to CD116.
- CD116 alone has low affinity for GM-CSF, but the addition of CD131 has been shown to bind with high affinity, form a complex, and signal through a specialized activation mechanism.
- Fig. 1 schematically shows the mechanism.
- CD131 forms a dimer in a steady state, and each CD131 molecule forms a hexamer through binding to GM-CSF and CD116.
- the distance between the transmembrane regions of CD131 in the hexamer state is about 120 ⁇ , and the distance between JAK2 is long, so the signal does not flow.
- the distance between the transmembrane regions of CD131 in the 12-mer is about 10 ⁇ , and the distance between JAK2 is close to prevent mutual phosphorylation.
- JAK2 and CD131 intracellular domain tyrosine residues are phosphorylated and signals are transduced (Non-Patent Documents 2 and 3).
- Non-Patent Documents 4 and 5 Alveolar proteinosis is a disease in which pulmonary surfactant abnormally accumulates in the alveolar space and causes dyspnea. It is believed that there is an abnormality in the processing of the surfactant. Anti-GM-CSF autoantibodies are also found in Crohn's disease, and have been reported to contribute to pathogenesis (Non-Patent Documents 6 and 7).
- Non-Patent Document 8 Treatment of alveolar proteinosis and Crohn's disease has been attempted using these preparations, and therapeutic effects have been reported particularly for alveolar proteinosis (Non-Patent Documents 9 and 10).
- Non-Patent Document 11 Although there have been reports of mitigation of neutralization by autoantibodies by amino acid modification of the GM-CSF molecule, the effect was only slight (Non-Patent Document 11). In addition, as a GM-CSF mimetics that is completely different from GM-CSF as a molecule, while having the property of inputting signals through GM-CSF receptors like GM-CSF, research has been conducted to connect receptor-binding peptides with a linker. has been reported (Patent Document 1).
- GM-CSF receptor-binding peptides that have been studied in the past have a problem of insufficient efficacy. may be neutralized by Considering that autoantibodies against GM-CSF are produced against various epitopes of GM-CSF (Non-Patent Document 12), neutralization of the GM-CSF receptor peptide by patient autoantibodies may It is considered difficult to solve by molecular modification of
- the present invention has been made in view of such circumstances, and includes a bispecific antibody having agonistic activity against the GM-CSF receptor, the bispecific antibody fragment, a DNA encoding the bispecific antibody or the bispecific antibody fragment, the Vectors containing DNA, hybridomas and transformants producing said bispecific antibody or bispecific antibody fragment, methods for producing said bispecific antibody or bispecific antibody fragment, therapy and diagnosis comprising said bispecific antibody or bispecific antibody fragment. It is an object of the present invention to provide drugs, therapeutic and diagnostic methods using said bispecific antibodies or bispecific antibody fragments, and detection or measurement reagents comprising said bispecific antibodies or bispecific antibody fragments.
- the present inventors found that by producing a bispecific antibody having an antigen-binding domain that binds to CD116 and CD131, which are constituent molecules of the GM-CSF receptor, The inventors have found that a bispecific antibody having agonistic activity to the GM-CSF receptor can be produced, and have completed the present invention.
- the present invention relates to the following.
- 1. comprising a first antigen-binding domain and a second antigen-binding domain; A bispecific antibody or the bispecific antibody, wherein one of the first antigen-binding domain and the second antigen-binding domain is an antigen-binding domain that binds to CD116, and the other is an antigen-binding domain that binds to CD131 antibody fragment.
- 2. The bispecific antibody or the bispecific antibody fragment according to 1 above, which has agonistic activity to a granulocyte macrophage-colonizing factor (hereinafter abbreviated as GM-CSF) receptor. 3.
- GM-CSF granulocyte macrophage-colonizing factor
- first antigen-binding domain and the second antigen-binding domain each comprise a heavy chain variable region (hereinafter abbreviated as VH) and a light chain variable region (hereinafter abbreviated as VL) or a bispecific antibody fragment according to . 4.
- VH heavy chain variable region
- VL light chain variable region
- the bispecific antibody or bispecific antibody fragment according to any one of 1 to 4 above, wherein the antigen-binding domain that binds to CD131 is any one selected from (1a) to (1e) below.
- VH comprising complementarity determining regions (hereinafter abbreviated as CDRs) 1 to 3 containing amino acid sequences represented by SEQ ID NOs: 61 to 63, respectively, and amino acid sequences represented by SEQ ID NOs: 64 to 66, respectively
- CDRs complementarity determining regions 1 to 3 containing amino acid sequences represented by SEQ ID NOs: 61 to 63, respectively, and amino acid sequences represented by SEQ ID NOs: 64 to 66, respectively
- 1c VH comprising CDR1-3 comprising amino acid sequences represented by SEQ ID NOs: 73-75, and CDR1- comprising amino acid sequences represented by SEQ ID NOs: 76-78, respectively
- the antigen-binding domain that binds to CD116 is any one selected from the following (2a) to (2q) and (2r-1) to (2r-12): A bispecific antibody or fragment thereof.
- (2r-3) CDR1 comprising the amino acid sequence represented by SEQ ID NO: 137, including the VL containing ⁇ 3, a modification was introduced to replace arginine at position 9 with threonine in the amino acid sequence represented by SEQ ID NO: 138 a VH comprising a CDR2 comprising an amino acid sequence and a CDR3 comprising an amino acid sequence represented by SEQ ID NO: 139; (2r-4) CDR1 containing the amino acid sequence represented by SEQ ID NO: 137, including VL containing CDRs 1 to 3 containing the amino acid sequences represented by sequence numbers 88 to 90, in the amino acid sequence represented by SEQ ID NO: 138 A VH comprising a CDR3 comprising an amino acid sequence represented by CDR2 and SEQ ID NO: 139 containing an amino acid sequence in which a modification was introduced to replace phenylalanine at position 2 with leucine and arginine at position 9 with threonine, and SEQ ID NO: 88, respectively (2r-
- VL comprising CDR1-3 comprising amino acid sequences represented by SEQ ID NOS: 88-90, respectively CDR1 comprising the amino acid sequence represented by SEQ ID NO: 137, represented by SEQ ID NO: 138
- CDR2 containing an amino acid sequence and an amino acid sequence in which modifications have been introduced to replace the second leucine of the amino acid sequence represented by SEQ ID NO: 139 with glutamic acid, the fifth tyrosine with tryptophan, and the sixth tyrosine with methionine.
- the second leucine in the amino acid sequence represented by SEQ ID NO:137 is replaced by phenylalanine , CDR1 containing an amino acid sequence in which a modification was introduced to replace the 3rd serine with alanine and the 4th methionine with leucine, CDR2 containing the amino acid sequence represented by SEQ ID NO: 138 and SEQ ID NO: 139 8.
- any one of 1 to 7 above, wherein the antigen-binding domain that binds to CD116 is any one selected from the following (2A) to (2Y) and (2Z-1) to (2Z-20) A bispecific antibody or fragment thereof.
- (2J) an amino acid sequence represented by SEQ ID NO:96 comprising a VL containing an amino acid sequence represented by SEQ ID NO:30 and VL comprising the amino acid sequence represented by SEQ ID NO: 30
- (2M) a VH comprising the amino acid sequence represented by SEQ ID NO: 99 comprising a VL comprising the amino acid sequence represented by SEQ ID NO: 30, and (2N) a VH containing the amino acid sequence represented by SEQ ID NO: 100, and a VL containing the amino acid sequence represented by SEQ ID NO: 30
- bispecific antibody according to any one of 1 to 8 above, wherein the first antigen-binding domain is an antigen-binding domain that binds to CD131, and the second antigen-binding domain is an antigen-binding domain that binds to CD116. Or said bispecific antibody fragment. 10.
- the first antigen-binding domain and the second antigen-binding domain are each Fab (hereinafter abbreviated as first Fab and second Fab, respectively), said first Fab comprises a heavy chain (VH 1 -CH1) comprising VH and CH1 domains and a light chain (VL-CL); said second Fab comprises a heavy chain (VH 2 -CH1′) comprising VH and CH1 domains and a light chain (VL-CL);
- the bispecific antibody or bispecific antibody fragment according to any one of 1 to 9 above. 11. one each of said first Fab and said second Fab, and a hinge region; 11.
- the bispecific antibody according to 10 above wherein the C-terminus of the heavy chain in the first Fab and the C-terminus of the heavy chain in the second Fab are each bound to the N-terminus of the hinge region. Or said bispecific antibody fragment.
- 12. The first polypeptide below, the second polypeptide below, and a hinge region, wherein the C-terminus of the first polypeptide and the C-terminus of the second polypeptide are at the N-terminus of the hinge region 11.
- the bispecific antibody or the bispecific antibody fragment according to 10 above which bind to each other.
- First polypeptide A polypeptide comprising at least the first Fab (VH 1 -CH1, VL-CL) at the N-terminus.
- Second polypeptide A polypeptide comprising at least the second Fab (VH 2 -CH1′, VL-CL) at the C-terminus. 13. A polypeptide chain (VH 1 -CH1-VH 2 - CH1′), and the hinge region, 11. The bispecific antibody or bispecific antibody fragment according to 10 above, wherein the C-termini of the two polypeptide chains are each linked to the N-terminus of the hinge region. 14. 14. The bispecific antibody or bispecific antibody fragment according to any one of 11 to 13 above, further comprising an Fc region, wherein the N-terminus of the Fc region is linked to the C-terminus of the hinge region. 15.
- the bispecific antibody according to any one of 1 to 14 above, wherein the bispecific antibody is any one selected from the following (x1) to (x12) and (x13-1) to (x13-12) or the Bispecific antibody fragment.
- (x1) VH comprising CDR1-3 wherein the first antigen-binding domain comprises amino acid sequences represented by SEQ ID NOs: 85-87, respectively, and CDR1 ⁇ comprising amino acid sequences represented by SEQ ID NOs: 88-90, respectively
- the second antigen-binding domain comprises a VH comprising CDRs 1-3 comprising amino acid sequences represented by SEQ ID NOs: 104-106, respectively, and amino acids represented by SEQ ID NOs: 88-90, respectively.
- a bispecific antibody (x2) comprising a VL comprising CDRs 1-3 comprising a sequence, a VH comprising CDRs 1-3 wherein said first antigen-binding domain comprises the amino acid sequences represented by SEQ ID NOS: 85-87, respectively, and each VL comprising CDRs 1-3 comprising amino acid sequences represented by SEQ ID NOs: 88-90, and CDRs 1-3 comprising amino acid sequences wherein the second antigen-binding domains are represented by SEQ ID NOs: 107-109, respectively
- a bispecific antibody (x3) comprising a VH and a VL comprising CDRs 1-3 comprising amino acid sequences represented by SEQ ID NOs: 88-90, respectively, wherein said first antigen-binding domains are represented by SEQ ID NOs: 85-87, respectively and a VH comprising CDR1-3 comprising an amino acid sequence represented by SEQ ID NO: 88-90, respectively, and a VL comprising CDR1-3 comprising an amino acid
- VH comprising CDR1-3 wherein the second antigen-binding domain comprises amino acid sequences represented by SEQ ID NOs: 113-115, respectively, and CDR1-3, each comprising amino acid sequences represented by SEQ ID NOs: 88-90 a bispecific antibody (x5) comprising a VL comprising 3, a VH comprising CDRs 1-3 wherein said first antigen-binding domain comprises the amino acid sequences represented by SEQ ID NOs: 85-87, respectively, and SEQ ID NOs: 88-90, respectively and a VL comprising CDRs 1-3 comprising an amino acid sequence represented by, and wherein the second antigen-binding domains are SEQ ID NOS: 116-1, respectively
- VH comprising CDR1-3 comprising the amino acid sequences represented by SEQ ID NOS: 85-87, respectively, and VL comprising CDR1-3 comprising the amino acid sequences represented by SEQ ID NOS: 88-90, respectively and a VH comprising CDRs 1 to 3 in which the second antigen-binding domain comprises the amino acid sequences represented by SEQ ID NOs: 119 to 121, respectively, and CDRs 1 to 3 comprising the amino acid sequences represented by SEQ ID NOs: 88 to 90, respectively.
- a bispecific antibody (x9) comprising a VH comprising CDRs 1-3 comprising amino acid sequences and a VL comprising CDRs 1-3 comprising amino acid sequences represented by SEQ ID NOs: 88-90, respectively, wherein the first antigen-binding domain is A VH comprising CDR1-3 comprising amino acid sequences represented by SEQ ID NOs:85-87, respectively, and a VL comprising CDR1-3 comprising amino acid sequences represented by SEQ ID NOs:88-90, respectively, and the second VH comprising CDR1-3, each of which has an antigen-binding domain comprising amino acid sequences represented by SEQ ID NOs: 128-130, and VL comprising CDR1-3, each comprising amino acid sequences represented by SEQ ID NOs: 88-90 , a bispecific antibody (x10) wherein the first antigen-binding domain comprises an amino acid sequence represented by SEQ ID NOs: 85-87, respectively VH comprising DR1-3, and VL comprising CDR1-3 comprising amino
- a bispecific antibody (x11) comprising a VH comprising CDRs 1 to 3 comprising an amino acid sequence represented by SEQ ID NOS: 88 to 90, and a VL comprising CDRs 1 to 3 comprising amino acid sequences represented by SEQ ID NOS: 88 to 90, respectively, the first antigen-binding domain VH comprising CDR1-3 comprising amino acid sequences represented by SEQ ID NOS: 85-87, respectively, and VL comprising CDR1-3 comprising amino acid sequences represented by SEQ ID NOS: 88-90, respectively, and A VH comprising CDRs 1 to 3 in which two antigen-binding domains each comprise the amino acid sequences represented by SEQ ID NOs: 134 to 136, and a VL comprising CDRs 1 to 3 each comprising the amino acid sequences represented by SEQ ID NOs: 88 to 90.
- a bispecific antibody wherein the first antigen-binding domain comprises CDRs 1-3 comprising amino acid sequences represented by SEQ ID NOs: 85-87, respectively, and amino acids represented by SEQ ID NOs: 88-90, respectively a VH comprising CDR1-3 comprising a VL comprising CDR1-3 comprising a sequence, and said second antigen-binding domain comprising an amino acid sequence represented by SEQ ID NOS: 137-139, respectively; and SEQ ID NOS: 88-90, respectively
- a bispecific antibody (x13-1) comprising a VL comprising CDRs 1 to 3 comprising an amino acid sequence represented by CDRs 1 to 3 wherein the first antigen-binding domain comprises an amino acid sequence represented by SEQ ID NOS: 85 to 87, respectively and a VL comprising CDR1-3 comprising amino acid sequences represented by SEQ ID NOS: 88-90, respectively, and wherein the second antigen-binding domain comprises an amino acid sequence represented by SEQ ID NO: 137 CDR
- a bispecific antibody comprising a VL comprising CDRs 1-3, a VH comprising CDRs 1-3 wherein said first antigen-binding domain comprises the amino acid sequences represented by SEQ ID NOs: 85-87, respectively, and sequences, respectively
- a CDR1 comprising a VL comprising CDRs 1-3 comprising the amino acid sequences represented by numbers 88-90
- the second antigen-binding domain comprises the amino acid sequence represented by SEQ ID NO: 137, represented by SEQ ID NO: 138
- a VH comprising a CDR3 comprising an amino acid sequence represented by CDR2 and SEQ ID NO: 139 which contains an amino acid sequence in which the second phenylalanine in the amino acid sequence is replaced with leucine and the ninth arginine is replaced with threonine
- a bispecific antibody (x13-5) comprising a VL comprising CDRs 1-3 comprising amino acid sequences represented by SEQ ID NOs: 88-90, respectively, amino
- CDR1 containing the introduced amino acid sequence, the amino acid sequence represented by SEQ ID NO: 138 A bispecific antibody (x13- 9) VH comprising CDR1-3, wherein the first antigen-binding domain comprises amino acid sequences represented by SEQ ID NOs: 85-87, respectively, and CDR1-3 comprising amino acid sequences represented by SEQ ID NOs: 88-90, respectively and the second antigen-binding domain is an amino acid sequence in which a modification was introduced to replace the second leucine with tyrosine and the third serine with alanine in the amino acid sequence represented by SEQ ID NO: 137 VH comprising CDR1 comprising the amino acid sequence represented by SEQ ID NO: 138, CDR2 comprising the amino acid sequence represented by SEQ ID NO: 139 and CDR3 comprising the amino acid sequence represented by SEQ ID NO: 139, and CDR1 ⁇ comprising the amino acid sequences represented by SEQ ID NOS: 88 to 90, respectively a bispecific antibody (x13-10) comprising
- the bispecific antibody according to any one of 1 to 15 above, wherein the bispecific antibody is any one selected from the following (y1) to (y12) and (y13-1) to (y13-20) or the Bispecific antibody fragment.
- the first antigen-binding domain comprises a VH comprising the amino acid sequence represented by SEQ ID NO: 29, and a VL comprising the amino acid sequence represented by SEQ ID NO: 30, and the second antigen-binding domain comprises A bispecific antibody (y2) comprising a VH comprising the amino acid sequence represented by SEQ ID NO: 175 and a VL comprising the amino acid sequence represented by SEQ ID NO: 30, wherein the first antigen-binding domain is represented by SEQ ID NO: 29 and a VH comprising a VL comprising the amino acid sequence represented by SEQ ID NO: 30, and wherein the second antigen-binding domain comprises the amino acid sequence represented by SEQ ID NO: 176, and SEQ ID NO: a bispecific antibody (y3) comprising a VL comprising an amino acid
- the first antigen-binding domain comprises VH comprising the amino acid sequence represented by SEQ ID NO: 29, and the VL comprising the amino acid sequence represented by SEQ ID NO: 30, and the second antigen-binding domain comprises SEQ ID NO: 194.
- a bispecific antibody (y13-6) comprising a VH comprising the amino acid sequence represented by SEQ ID NO:30 and a VL comprising the amino acid sequence represented by SEQ ID NO:30, wherein the first antigen-binding domain is represented by SEQ ID NO:29 VH comprising the sequence, and VL comprising the amino acid sequence represented by SEQ ID NO: 30, and wherein the second antigen-binding domain comprises the amino acid sequence represented by SEQ ID NO: 195, and SEQ ID NO: 30
- a bispecific antibody (y13-7) comprising a VL comprising the amino acid sequence represented by VH wherein the first antigen-binding domain comprises the amino acid sequence represented by SEQ ID NO: 29, and an amino acid represented by SEQ ID NO: 30
- the C-terminus of the heavy chain (VH 1 -CH1) in the first Fab and the N-terminus of the heavy chain (VH 2 -CH1′) in the second Fab are connected directly or via a linker.
- (VH 1 -CH1-VH 2 ) in the polypeptide chain is selected from the following (v1) to (v12) and (v13-1) to (v13-20) 15.
- VH 1 containing the amino acid sequence represented by 29, CH1 containing the amino acid sequence represented by SEQ ID NO: 144, and VH 2 containing the amino acid sequence represented by SEQ ID NO: 209.
- the C-terminus of the heavy chain (VH 1 -CH1) in the first Fab and the N-terminus of the heavy chain (VH 2 -CH1′) in the second Fab are linked directly or via a linker heavy chain 2 comprising the polypeptide chain having the polypeptide chain, the hinge region having the N-terminus bound to the C-terminus of the polypeptide chain, and the Fc region (CH2-CH3) having the N-terminus bound to the C-terminus of the hinge region and 4 light chains (VL-CL), wherein said CH1' and said Fc regions (CH2-CH3) comprise an amino acid sequence represented by any one of SEQ ID NOS: 145-172; 18.
- the C-terminus of the heavy chain of the first antigen-binding domain in the two first Fabs is respectively bound to the N-terminus of the hinge region, the C-terminus of the hinge region is bound to the N-terminus of the Fc region; Any one of 10, 15, 16 and A1 above, wherein the C-terminus of the Fc region is bound to the N-termini of the heavy chains of the second antigen-binding domains of the two second Fabs, respectively. or a bispecific antibody fragment thereof.
- said Fc region is of the IgG1 subclass and comprises amino acid residue substitutions of L234A, L235A and G237A with EU index; or said Fc region is of IgG4 subclass and of S228P, L235E and R409K with EU index.
- A5. The bispecific antibody or bispecific antibody fragment of any one of 14 to 18 and A1 to A4, wherein the Fc region further comprises an H435F amino acid residue substitution represented by the EU index. 19.
- the transformant strain described in 21 above is cultured in a medium, the bispecific antibody or the bispecific antibody fragment according to any one of 1 to 18 and A1 to A5 is produced and accumulated in the culture, and the culture is The method for producing the bispecific antibody or the bispecific antibody fragment according to any one of 1 to 17 and A1 to A5 above, wherein the bispecific antibody or the bispecific antibody fragment is collected from a strain.
- A7. 23. The therapeutic and/or diagnostic agent according to 22 above, wherein the disease associated with GM-CSF is a disease associated with an autoantibody against GM-CSF. A8.
- A11 The bispecific antibody or bispecific antibody fragment of A10 above, wherein the disease associated with GM-CSF is a disease associated with an autoantibody to GM-CSF.
- bispecific antibody or bispecific antibody fragment for the treatment and/or manufacture of a diagnostic agent for diseases associated with GM-CSF.
- A13. The use according to A12 above, wherein the disease associated with GM-CSF is a disease associated with an autoantibody to GM-CSF.
- A14. A reagent for detecting or measuring at least one of CD116 and CD131, comprising the bispecific antibody or bispecific antibody fragment of any one of 1 to 18 and A1 to A5 above.
- a method for purifying a composition containing an antibody comprising purifying an antibody containing an Fc region by protein A column chromatography, wherein the antibody has a H435F mutation in the Fc region.
- purification method. 24 binds to an epitope comprising W at position 163, R at position 221 of CD131 (SEQ ID NO: 211) and an epitope comprising N at position 156, K at position 158, T at position 187 of CD116 (SEQ ID NO: 210); 19.
- the bispecific antibody or the bispecific antibody fragment according to any one of 1 to 18 above.
- a novel bispecific antibody that binds to CD116 and CD131 a novel bispecific antibody that has agonistic activity against the GM-CSF receptor, said bispecific antibody fragment, said bispecific antibody or bispecific antibody fragment encoding DNA, vector containing said DNA, hybridoma and transformant producing said bispecific antibody or bispecific antibody fragment, method for producing said bispecific antibody or bispecific antibody fragment, said bispecific antibody or bispecific antibody fragment Therapeutic and diagnostic agents, therapeutic and diagnostic methods using the bispecific antibody or bispecific antibody fragment, and detection or measurement reagents comprising the bispecific antibody or bispecific antibody fragment can be provided.
- FIG. 1 shows a schematic representation of the GM-CSF receptor.
- FIG. 2 shows a schematic diagram of an IgG-type CD131-CD116 bispecific antibody.
- (A) and (B) of FIG. 3 show the GM-CSF receptor agonist activity of the IgG-type CD131-CD116 bispecific antibody on TF-1 cells.
- Agonist activity is shown as the proliferation rate of TF-1 cells when the activity when 200 pM of recombinant human GM-CSF (rhGM-CSF) is added is defined as 100%.
- FIG. 4A shows the structure of an N-terminal CD131-CD116 bispecific antibody or an N-terminal CD116-CD131 bispecific antibody.
- FIG. 4B shows the structure of a C-terminal CD131-CD116 bispecific antibody or a C-terminal CD116-CD131 bispecific antibody.
- FIG. 5 shows the GM-CSF receptor agonist activity of the CD131-CD116 bispecific antibody on TF-1 cells.
- Agonist activity is shown as the proliferation rate of TF-1 cells when the activity when 200 pM of recombinant human GM-CSF (rhGM-CSF) is added is defined as 100%. All constant regions used IgG4PE R409K. The horizontal axis indicates the antibody concentration.
- FIG. 6 shows the GM-CSF receptor agonist activity against TF-1 cells of CD131-CD116 bispecific antibodies with mutations inserted in the Fc region.
- the horizontal axis indicates the antibody concentration.
- FIG. 7 shows the GM-CSF receptor agonist activity against TF-1 cells of CD131-CD116 bispecific antibodies with mutations inserted in the Fc region.
- Agonist activity is shown as the proliferation rate of TF-1 cells when the activity when 200 pM of recombinant human GM-CSF (rhGM-CSF) is added is defined as 100%.
- the horizontal axis indicates the antibody concentration.
- FIG. 8 shows the agonist activity of CD131-CD116 bispecific antibodies against human CD14-positive monocytes.
- (A) to (C) of FIG. 9 show the specificity of the agonist activity exerted by the CD131-CD116 bispecific antibody to the GM-CSF receptor.
- FIG. 11 shows the GM-CSF receptor agonist activity on TF-1 cells of the CD131-CD116 bispecific antibody produced from the anti-CD116 antibody obtained using the next-generation sequencing system.
- the horizontal axis indicates the antibody concentration.
- FIG. 12 shows the GM-CSF receptor agonist activity on TF-1 cells of the CD131-CD116 bispecific antibody generated from the anti-CD116 antibody obtained by affinity maturation.
- FIG. 13 shows the GM-CSF receptor agonist activity of the CD116-CD131 bispecific antibody on TF-1 cells.
- FIG. 14 shows the GM-CSF receptor agonist activity of the C-terminal CD131-CD116 bispecific antibody on TF-1 cells.
- FIG. 14(B) shows the GM-CSF receptor agonist activity of the C-terminal CD116-CD131 bispecific antibody on TF-1 cells.
- the horizontal axis indicates the antibody concentration.
- FIG. 15 shows the GM-CSF receptor agonist activity on TF-1 cells of the CD131-CD116 bispecific antibody converted to IgG-type bispecific antibody.
- FIG. 16 shows the structure of a CD131-CD116 bispecific antibody with controlled valency. 116-408 D31A_Y98 VH is 116-408 VH that has lost its binding activity due to amino acid mutation. (valence of anti-CD116 antibody ⁇ valence of anti-CD131 antibody) is shown in parentheses.
- 17A and 17B show the GM-CSF receptor agonist activity of the valency-controlled CD131-CD116 bispecific antibody shown in FIG. 16 on TF-1 cells.
- (A) to (C) of FIG. 18 show the results of human FcRn-binding activity analysis of the CD131-CD116 bispecific antibody in which an amino acid mutation abolishing FcRn binding was inserted in the Fc region.
- FIG. 18 is a sensorgram showing binding to human FcRn when IgG4PE R409K wild type (WT) is used as the Fc region, and (B) of FIG. 18 is the IgG4PE R409 I253A mutant used as the Fc region. In this case, (C) of FIG. 18 shows a sensorgram when IgG4PE R409 H435F was used as the Fc region. No binding to human FcRn was observed when the I253A or H435F mutants were used.
- the vertical axis indicates resonance units (RU), and the horizontal axis indicates time (sec).
- FIG. 19 shows equilibrium plots for the binding of each CD131-CD116 bispecific antibody variant using the IgG4PE R409K variant in the Fc region to human FcRn.
- the vertical axis indicates the resonance unit (RU), and the horizontal axis indicates the bispecific antibody concentration (M, mol/L).
- FIG. 20 shows equilibrium value plots for the binding of each CD131-CD116 bispecific antibody variant using the IgG1 LALAGA variant in the Fc region to human FcRn.
- the vertical axis indicates the resonance unit (RU), and the horizontal axis indicates the bispecific antibody concentration (M, mol/L).
- the present invention relates to a novel bispecific antibody that binds to CD116 and CD131, a novel bispecific antibody that has agonistic activity against the GM-CSF receptor, and the bispecific antibody fragment.
- CD116 in the present invention is used synonymously with CSF2RA, GM-CSFR ⁇ , GM-CSF-R-alpha, CDw116, CSF2RAX, CSF2RAY, CSF2RX, CSF2RY, GMCSFR, GMR, MGC3848 and MGC4838.
- CD116 for example, GenBank Accession No. 1 at NCBI (https://www.ncbi.nlm.nih.gov/) monkey CD116 containing the amino acid sequence shown in human CD116 containing the amino acid sequence shown in P15509; Also, for example, GenBank accession No. Examples thereof include polypeptides consisting of an amino acid sequence in which one or more amino acids are deleted, substituted or added in the amino acid sequence shown in P15509 and having the function of CD116.
- GenBank Accession No. A polypeptide comprising an amino acid sequence having usually 70% or more, preferably 80% or more, more preferably 90% or more homology with the amino acid sequence shown in P15509, most preferably 95% or more, 96% or more, 97% or more , 98% or more, and 99% or more homology, and having the functions of CD116 are also included in the CD116 of the present invention.
- GenBank Accession No. A polypeptide having an amino acid sequence in which one or more amino acid residues are deleted, substituted, or added to the amino acid sequence shown in P15509 can be obtained by site-directed mutagenesis [Molecular Cloning, A Laboratory Manual, Second Edition, Cold Spring Harbor Laboratory Press (1989), Current Protocols in Molecular Biology, John Wiley & Sons (1987-1997), Nucleic Acids Research, 10, 6487 (1982), Proc. Natl. Acad. Sci. USA, 79, 6409 (1982) , Gene, 34, 315 (1985), Nucleic Acids Research, 13, 4431 (1985), Proceeding of the National Academy of Sciences in USA, 82, 488 (1985)], for example, GenBank Accession No.
- the number of amino acids to be deleted, substituted or added is not particularly limited, but preferably 1 to several tens, for example 1 to 20, more preferably 1 to several, for example 1 to 5 amino acids. is.
- CD116 for example, SEQ ID NO: 6 or GenBank Accession No. Examples thereof include the human CD116 base sequence shown in X17648 and the monkey CD116 base sequence shown in SEQ ID NO:7.
- DNAs that hybridize under stringent conditions include, for example, SEQ ID NO: 6, GenBank Accession No. Hybridizable obtained by a colony hybridization method, a plaque hybridization method, a Southern blot hybridization method, a DNA microarray method, or the like using a DNA having the nucleotide sequence shown in X17648 or SEQ ID NO: 7 as a probe means DNA.
- hybridizable DNA examples include SEQ ID NO: 6, GenBank Accession No. A DNA having preferably 60% or more homology, more preferably 80% or more homology, and still more preferably 95% or more homology with the nucleotide sequence shown in X17648 or SEQ ID NO: 7. be able to.
- Gene polymorphisms are often found in the nucleotide sequences of genes that encode eukaryotic proteins. Genes used in the present invention that have minor mutations in their base sequences due to such polymorphisms are also included in the CD116-encoding gene of the present invention.
- Homology values in the present invention may be values calculated using a homology search program known to those skilled in the art, unless otherwise specified. ., 215, 403 (1990)], for amino acid sequences, BLAST 2 [Nucleic Acids Research, 25, 3389 (1997), Genome Research, 7, 649 (1997)]. numerical values calculated using the default parameters in .
- a polypeptide consisting of a partial sequence of the amino acid sequence of CD116 can be produced by a method known to those skilled in the art.
- a polypeptide consisting of a partial sequence of CD116 can be obtained from GenBank Accession No. It can be produced by culturing a transformant into which a part of the DNA encoding the amino acid sequence shown in P15509 has been deleted and an expression vector containing this has been introduced.
- polypeptide having an amino acid sequence in which one or more amino acids are deleted, substituted or added in a partial sequence of the amino acid sequence shown in P15509 can be obtained.
- a polypeptide consisting of a partial sequence of the amino acid sequence of CD116 or a polypeptide having an amino acid sequence in which one or more amino acids are deleted, substituted or added in the partial sequence of the amino acid sequence of CD116 is fluorenylmethyloxycarbonyl It can also be produced by chemical synthesis methods such as the (Fmoc) method and the t-butyloxycarbonyl (tBoc) method.
- the extracellular region of CD116 in the present invention for example, GenBank Accession No.
- the amino acid sequence of human CD116 shown in P15509 was analyzed using a known transmembrane region prediction program SOSUI, TMHMM ver. 2 (https://services.healthtech.dtu.dk/service.php?TMHMM-2.0) or regions predicted using ExPASy Proteomics Server (http://Ca.expasy.org/) .
- the extracellular region of CD116 is GenBank Accession No. Examples include the amino acid sequence shown at positions 23-320 of P15509.
- CD116 Functions of CD116 include binding of the ligand GM-CSF [Cytokine Growth Factor Rev., 12, 19 (2001)].
- Cells expressing CD116 include, for example, monocytes, granulocytes, their progenitor cells, endothelial cells, fibroblasts, and Langerhans cells.
- CD131 in the present invention is used synonymously with CSF2RB, IL3RB, IL5RB, SMDP5, common ⁇ receptor, and ⁇ c.
- CD131 for example, UniProt Entry. No. Human CD131 comprising the amino acid sequence shown in P32927, and GenBank Accession No. XP_015312724_1 and monkey CD131 comprising the amino acid sequence shown.
- UniProt Entry. No. P32927 or GenBank Accession No. Examples thereof include polypeptides having an amino acid sequence in which one or more amino acids are deleted, substituted or added in the amino acid sequence shown in XP_015312724_1 and having the function of CD131.
- a polypeptide comprising an amino acid sequence having usually 70% or more, preferably 80% or more, more preferably 90% or more homology with the amino acid sequence shown in XP_015312724_1, most preferably 95% or more, 96% or more, 97% or more , 98% or more and 99% or more homology with amino acid sequences and having the functions of CD131 are also included in CD131 in the present invention.
- a polypeptide having an amino acid sequence in which one or more amino acid residues are deleted, substituted, or added in XP_015312724_1 can be obtained using the above-described site-directed mutagenesis method, for example, UniProt Entry. No. P32927 or GenBank Accession No. It can be obtained by introducing site-directed mutation into DNA encoding the amino acid sequence shown in XP_015312724_1.
- the number of amino acids to be deleted, substituted or added is not particularly limited, but preferably 1 to several tens, for example 1 to 20, more preferably 1 to several, for example 1 to 5 amino acids. is.
- CD131 for example, SEQ ID NO: 1 or GenBank Accession No. Examples thereof include the human CD131 base sequence shown in M59941 and the monkey CD131 base sequence shown in SEQ ID NO:2.
- SEQ ID NO: 1, GenBank accession No. M59941 or a gene comprising a nucleotide sequence in which one or more bases are deleted, substituted or added in the nucleotide sequence shown in SEQ ID NO: 2 and encoding a polypeptide having the function of CD131 SEQ ID NO: 1, GenBank Accession No.
- DNAs that hybridize under stringent conditions include, for example, SEQ ID NO: 1 or GenBank Accession No. 1, as described above.
- Hybridizable obtained by a colony hybridization method, a plaque hybridization method, a Southern blot hybridization method, a DNA microarray method, or the like using a DNA having the nucleotide sequence shown in M59941 or SEQ ID NO: 2 as a probe means DNA.
- Examples of hybridizable DNA include SEQ ID NO: 1, GenBank Accession No. A DNA having preferably 60% or more homology, more preferably 80% or more homology, and still more preferably 95% or more homology with the nucleotide sequence shown in M59941 or SEQ ID NO: 2. be able to.
- Gene polymorphisms are often found in the nucleotide sequences of genes that encode eukaryotic proteins. Genes used in the present invention that have minor mutations in their base sequences due to such polymorphisms are also included in the CD131-encoding genes of the present invention.
- a polypeptide consisting of a partial sequence of the amino acid sequence of CD131 is UniProt Entry. No. P32927 or GenBank Accession No. Using a DNA encoding the amino acid sequence shown in XP_015312724_1, it can be produced by methods known to those skilled in the art in the same manner as described above.
- the extracellular domain of CD131 in the present invention includes, for example, UniProt Entry. No. Examples include the region predicted by the same method as described above using the amino acid sequence of human CD131 shown in P32927. Specifically, the extracellular region of CD131 includes UniProt Entry. No. The amino acid sequence shown at positions 17 to 443 of P32927 is exemplified.
- CD131 The function of CD131 is to associate with CD116 (GM-CSFR ⁇ ), CD123 (IL-3R ⁇ ), and CD125 (IL-5R ⁇ ), and transduce GM-CSF, IL-3, and IL-5 signals into cells, respectively. [Cytokine Growth Factor Rev., 12, 19 (2001)].
- Cells that express CD131 include, for example, monocytes, granulocytes and early B cells.
- An antibody is a gene (referred to as an "antibody gene") encoding all or part of a heavy chain variable region and a heavy chain constant region, and a light chain variable region and a light chain constant region, which constitute an immunoglobulin.
- an antibody gene a gene encoding all or part of a heavy chain variable region and a heavy chain constant region, and a light chain variable region and a light chain constant region, which constitute an immunoglobulin.
- is a protein derived from Antibodies of the present invention include antibodies or antibody fragments of any immunoglobulin class and subclass.
- a heavy chain refers to the polypeptide with the larger molecular weight of the two types of polypeptides that constitute an immunoglobulin molecule. Heavy chains determine the class and subclass of an antibody. IgA, IgD, IgE, IgG and IgM have ⁇ , ⁇ , ⁇ , ⁇ and ⁇ chains as heavy chains, respectively, and the constant regions of the heavy chains are characterized by different amino acid sequences.
- a light chain refers to a polypeptide having a smaller molecular weight among two types of polypeptides that constitute an immunoglobulin molecule. In the case of human antibodies, there are two types of light chains, the ⁇ chain and the ⁇ chain.
- variable region usually refers to a highly diverse region present in the N-terminal amino acid sequence of an immunoglobulin.
- the portion other than the variable region is called a constant region (C region) because it has a structure with less diversity.
- the variable regions of the heavy and light chains associate to form the antigen-binding site and determine the binding characteristics of the antibody to antigen.
- variable region corresponds to the amino acid sequence from 1 to 117 in the EU index of Kabat et al. (Kabat et al., Sequences of proteins of immunological interest, 1991 Fifth edition), and the constant region is It corresponds to the 118th and subsequent amino acid sequences.
- amino acid sequence from 1st to 107th in Kabat numbering corresponds to the variable region, and the amino acid sequence after 108th corresponds to the constant region.
- VH or VL the heavy chain variable region or light chain variable region.
- the antigen-binding site is the site of an antibody that recognizes and binds to an antigen, and refers to the site that forms a three-dimensional structure complementary to the antigenic determinant (epitope). Antigen-binding sites generate strong intermolecular interactions with antigenic determinants.
- the antigen-binding site is composed of VH and VL, which contain at least three complementarity determining regions (CDRs). For human antibodies, VH and VL each have three CDRs. These CDRs are called CDR1, CDR2 and CDR3 in order from the N-terminal side.
- CH heavy chain constant region or light chain constant region
- CHs are classified by the heavy chain subclasses alpha, delta, epsilon, gamma and mu chains.
- CH consists of a CH1 domain, a hinge domain, a CH2 domain and a CH3 domain arranged in order from the N-terminal side, and the CH2 domain and the CH3 domain are collectively referred to as the Fc region.
- CL is classified into two subclasses called C ⁇ chains and C ⁇ chains.
- Monoclonal antibodies are antibodies that are secreted by antibody-producing cells that retain their monoclonality, and recognize a single epitope (also called antigenic determinant). Monoclonal antibody molecules have the same amino acid sequence (primary structure) and have a single structure.
- a polyclonal antibody refers to a population of antibody molecules secreted by different clones of antibody-producing cells.
- An oligoclonal antibody refers to a population of antibody molecules in which multiple different monoclonal antibodies are mixed.
- An epitope refers to the structural site of an antigen that is recognized and bound by an antibody.
- Epitopes include, for example, a single amino acid sequence recognized and bound by a monoclonal antibody, a three-dimensional structure consisting of an amino acid sequence, an amino acid sequence bound with a sugar chain, and a three-dimensional structure consisting of an amino acid sequence bound with a sugar chain. .
- Monoclonal antibodies in the present invention include antibodies produced by hybridomas and genetically recombinant antibodies produced by transformants transformed with expression vectors containing antibody genes.
- Hybridomas can be prepared, for example, by preparing an antigen, obtaining antibody-producing cells having antigen specificity from an animal immunized with the antigen, and fusing the antibody-producing cells with myeloma cells.
- the desired monoclonal antibody can be obtained by culturing the hybridoma or administering the hybridoma to an animal to induce ascites carcinoma in the hybridoma, and separating and purifying the culture medium or ascites.
- Any animal can be used as an animal to be immunized with an antigen as long as a hybridoma can be produced, and mice, rats, hamsters, rabbits and the like are preferably used.
- cells capable of producing antibodies can be obtained from such immunized animals, immunized in vitro, and then fused with myeloma cells to produce hybridomas.
- genetically modified antibodies in the present invention include recombinant mouse antibodies, recombinant rat antibodies, recombinant hamster antibodies, recombinant rabbit antibodies, human chimeric antibodies (also referred to as chimeric antibodies), humanized antibodies (CDR-grafted antibodies Also referred to as ) and antibodies produced by genetic recombination techniques, such as human antibodies.
- genetically engineered antibodies it is possible to determine the heavy and light chain variable regions and constant regions derived from which animal species to be applied, depending on the target animal species and purpose. For example, when the target animal species is human, the variable region can be human-derived or non-human animal-derived such as mouse, and the constant region and linker can be human-derived.
- a chimeric antibody refers to an antibody consisting of non-human animal (non-human animal) antibody VH and VL and human antibody CH and CL. Any non-human animals such as mice, rats, hamsters and rabbits can be used as long as hybridomas can be produced.
- Chimeric antibodies are obtained by obtaining cDNAs encoding VH and VL from hybridomas derived from non-human animals that produce monoclonal antibodies, and inserting them into expression vectors for animal cells having DNAs encoding CH and CL of human antibodies, respectively. It can be produced by constructing a chimeric antibody expression vector and introducing it into animal cells for expression.
- a humanized antibody refers to an antibody in which the CDRs of the VH and VL of a non-human animal antibody have been grafted into the corresponding CDRs of the VH and VL of a human antibody. Regions other than the CDRs of VH and VL are called framework regions (hereinafter referred to as FRs).
- a humanized antibody comprises a cDNA encoding a VH amino acid sequence consisting of a non-human animal antibody VH CDR amino acid sequence and an arbitrary human antibody VH FR amino acid sequence, and a non-human animal antibody VL CDR amino acid sequence.
- a cDNA encoding the VL amino acid sequence consisting of the sequence and the FR amino acid sequence of the VL of any human antibody is constructed and inserted into an expression vector for animal cells having DNA encoding the CH and CL of a human antibody, respectively. It can be produced by constructing a modified antibody expression vector and introducing it into animal cells for expression.
- Human antibodies originally refer to antibodies that naturally exist in the human body. Antibodies obtained from genetic animals are also included.
- Antibodies that naturally exist in the human body are, for example, immortalized by infecting human peripheral blood lymphocytes with EB virus or the like, cloned, culturing lymphocytes that produce the antibodies, and extracting the antibodies from the culture supernatant. It can be obtained by purifying the antibody.
- a human antibody phage library is a library in which antibody fragments such as Fab and scFv (single chain Fv) are expressed on the phage surface by inserting antibody genes prepared from human B cells into the phage genes. Using the binding activity to the antigen-immobilized substrate as an index, phage expressing on the surface an antibody fragment having desired antigen-binding activity can be recovered from the library. The antibody fragment can be further converted into a human antibody molecule consisting of two complete H chains and two complete L chains by genetic engineering techniques.
- Human antibody-producing transgenic animals mean animals in which human antibody genes have been integrated into cells.
- a human antibody-producing transgenic mouse can be produced by introducing a human antibody gene into a mouse ES cell, transplanting the ES cell into an early embryo of a mouse, and developing an individual.
- Human antibodies derived from human antibody-producing transgenic animals are produced and accumulated in the culture supernatant by obtaining and culturing hybridomas using a hybridoma production method that is commonly used in non-human animals. can be prepared.
- Any CH of the recombinant antibody may be used as long as it belongs to human immunoglobulin, but the human immunoglobulin G (hIgG) class is preferable. Furthermore, any of the subclasses of hIgG1, hIgG2, hIgG3 and hIgG4 belonging to the hIgG class can be used. As the CL of the recombinant antibody, any one belonging to human immunoglobulin may be used, and those of the ⁇ class or the ⁇ class can be used.
- a bispecific antibody refers to a polypeptide or protein having an antigen-binding domain that specifically binds to each of two different epitopes.
- a bispecific antibody may bind to different epitopes of a single antigen or may bind to different antigens. Moreover, when binding to different antigens, those antigens may be present in the same cell or in different cells.
- the bispecific antibody of the present invention contains two different epitopes, a first antigen-binding domain and a second antigen-binding domain that specifically bind to CD131 or CD116, respectively. Either one of the first antigen-binding domain and the second antigen-binding domain is an antigen-binding domain that binds to CD116, and the other is an antigen-binding domain that binds to CD131.
- the epitopes of the bispecific antibody of the present invention include an epitope containing tryptophan (W) at position 163 of CD131 (SEQ ID NO: 211) and arginine (R) at position 221, and asparagine at position 156 of CD116 (SEQ ID NO: 210) ( N), lysine at position 158 (K) and threonine at position 187 (T).
- Epitopes comprising tryptophan (W) at position 163 and arginine (R) at position 221 of CD131 (SEQ ID NO: 211) and asparagine (N) at position 156, lysine (K) at position 158 of CD116 (SEQ ID NO: 210) and All epitopes containing the 187th threonine (T) are conformational epitopes.
- binding of the polypeptide, antibody or antibody fragment or bispecific antibody or bispecific antibody fragment to CD116 and/or CD131 can be detected by, for example, a known immunological detection method, preferably fluorescent cell staining. It can be confirmed by a method for confirming the binding between the cells expressing CD131 or CD116 to be evaluated and the antibody using a method or the like.
- known immunological detection methods [Monoclonal Antibodies - Principles and Practice, Third Edition, Academic Press (1996), Antibodies - A Laboratory Manual, Cold Spring Harbor Laboratory (1988), Monoclonal Antibody Experiment Manual, Kodansha Scientific (1987)] can also be used in combination.
- the number of amino acids to be deleted, substituted, inserted and/or added is one or more, and the number is not particularly limited. Molecular Cloning, The Second Edition, Cold Spring Harbor Laboratory Press (1989), Current Protocols in Molecular Biology Sci., USA, 79, 6409 (1982), Gene, 34, 315 (1985), Nucleic Acids Research, 13, 4431 (1985), Proc. Natl. Acad. Sci USA, 82, 488 (1985), etc., by known techniques such as site-directed mutagenesis, etc. as many as possible. For example, it is usually 1 to several tens, preferably 1 to 20, more preferably 1 to 10, still more preferably 1 to 5.
- deletion, substitution, insertion or addition of one or more amino acid residues in the amino acid sequence of the bispecific antibody of the present invention above indicates the following. Deletion, substitution, insertion or addition of one or more amino acid residues in any of the same sequences and in one or more amino acid sequences. Moreover, deletion, substitution, insertion or addition may occur simultaneously, and the substituted, inserted or added amino acid residue may be either natural or non-natural.
- Natural amino acid residues include, for example, L-alanine, L-asparagine, L-aspartic acid, L-glutamine, L-glutamic acid, glycine, L-histidine, L-isoleucine, L-leucine, L-lysine, L -arginine, L-methionine, L-phenylalanine, L-proline, L-serine, L-threonine, L-tryptophan, L-tyrosine, L-valine and L-cysteine.
- Group A leucine, isoleucine, norleucine, valine, norvaline, alanine, 2-aminobutanoic acid, methionine, O-methylserine, t-butylglycine, t-butylalanine, cyclohexylalanine
- Group B aspartic acid, glutamic acid, isoaspartic acid, Isoglutamic acid, 2-aminoadipic acid, 2-aminosuberic acid
- Group C asparagine, glutamine
- D lysine, arginine, ornithine, 2,4-diaminobutanoic acid, 2,3-diaminopropionic acid
- Group E proline, 3 -Hydroxyproline, 4-hydroxyproline
- Group F serine, threonine, homoserine
- Group G phenylalanine, tyrosine
- the bispecific antibodies or antibody fragments of the present invention may contain unnatural amino acids, such as the Z lysine derivative disclosed in WO 2017/030156 (N6-((benzyloxy)carbonyl) -L-lysine derivative), TCO*-Lys (N6-(((trans-cyclooct-2-en-1-yl)oxy)carbonyl)-L-lysine) or BCN-Lys (N6-((bicyclo[6 .1.0]non-4-yn-9-ylmethoxy)carbonyl)-L-lysine).
- Z lysine derivative disclosed in WO 2017/030156
- TCO*-Lys N6-(((trans-cyclooct-2-en-1-yl)oxy)carbonyl)-L-lysine)
- BCN-Lys N6-((bicyclo[6 .1.0]non-4-yn-9-ylmethoxy)carbonyl)-L-ly
- the bispecific antibody or bispecific antibody fragment of the present invention includes antibodies containing any post-translationally modified amino acid residues.
- Post-translational modifications include, for example, deletion of lysine residues at the C-terminus of H chains (lysine clipping) and substitution of glutamine residues with pyroglutamine (pyroGlu) at the N-terminus of polypeptides. [Beck et al, Analytical Chemistry, 85, 715-736 (2013)].
- the bispecific antibody or bispecific antibody fragment of the present invention includes, for example, a bispecific antibody or bispecific antibody fragment having GM-CSF receptor agonist activity.
- the bispecific antibody or bispecific antibody fragment of the present invention does not exhibit GM-CSF receptor agonist activity on cells that do not express CD116 and CD131, and does not exhibit GM-CSF receptor agonist activity only on cells that express CD116 and CD131.
- the bispecific antibody or the bispecific antibody fragment of the present invention has CD131 as a common constituent molecule with GM-CSF receptor, and does not put signals into IL-3 receptor or IL-5 receptor. is preferred.
- the bispecific antibody or bispecific antibody fragment of the invention may bind to CD116 and CD131 expressed on the same cell or may bind to CD116 and CD131 expressed on different cells. preferably binds to CD116 and CD131 expressed on the same cell.
- Agonist activity refers to activity that binds to a receptor and performs intracellular signal transduction similar to that of the original ligand for that receptor.
- the bispecific antibody of the present invention preferably has agonistic activity against the GM-CSF receptor.
- the bispecific antibody of the present invention can act on the GM-CSF receptor in the same manner as GM-CSF and exhibit agonistic activity.
- the agonist activity to the GM-CSF receptor is, for example, GM-CSF binds to both CD116 and CD131 on the cell, resulting in signal transduction from the GM-CSF receptor into the cell.
- GM-CSF binds to both CD116 and CD131 on the cell, resulting in signal transduction from the GM-CSF receptor into the cell.
- signal transduction from the GM-CSF receptor results in the activity of inducing differentiation into macrophages.
- the bispecific antibody or bispecific antibody fragment of the present invention preferably has agonistic activity against the GM-CSF receptor and transduces a signal into cells after binding to the GM-CSF receptor.
- the bispecific antibody or bispecific antibody fragment of the present invention preferably binds to GM-CSF receptors on monocytes and has the ability to induce differentiation into macrophages.
- the bispecific antibody or the bispecific antibody fragment of the present invention binds to CD116 and CD131 expressed on the same cell, and then induces the formation of a GM-CSF receptor complex to transmit a signal into the cell. is preferred.
- the bispecific antibody or bispecific antibody fragment of the present invention preferably binds to CD116 and CD131 on monocytes and has the ability to induce differentiation into macrophages.
- Agonist activity against the GM-CSF receptor can be measured using cells that express the GM-CSF receptor, such as the human erythroblast cell line TF-1 (CRL-2003), and proliferate in a GM-CSF dependent manner. It can be confirmed by evaluating the proliferation rate, survival rate, or viable cell count.
- bispecific antibodies or bispecific antibody fragments of the present invention specifically those that act as GM-CSF receptor agonists when bound to both CD116 and CD131, and/or bispecific antibodies or bispecific antibody fragments having the ability to induce differentiation of macrophages.
- the number of antigen-binding domains that a single molecule of bispecific antibody has for an antigen is called the binding valency.
- a molecule of bispecific antibody has one antigen-binding domain that binds to CD116 and one antigen-binding domain that binds to CD131, such bispecific antibody monovalently binds to CD116 and CD131, respectively. Join.
- the bispecific antibody of the present invention preferably binds monovalently or bivalently to CD116 and CD131, and more preferably binds bivalently from the viewpoint of improving agonist activity.
- the first antigen-binding domain and the second antigen-binding domain may be any domain that specifically recognizes and binds to CD131 or CD116, respectively.
- antibodies, ligands, receptors, and naturally occurring interacting molecules, polypeptides, protein molecules and fragments thereof that can be produced by genetic recombination techniques, and conjugates of such protein molecules with small molecules or natural products It may be in any form.
- the first antigen-binding domain and the second antigen-binding domain may be recombinant binding proteins using binding domains of known binding molecules such as antibodies (hereinafter also referred to as immunoglobulins), ligands and receptors. More specifically, recombinant proteins containing CDRs of antibodies that bind to each antigen, antibody variable regions (VH and VL) containing CDRs, antibody fragments such as antibody variable regions, and binding domains of ligands that bind to each antigen. Examples include recombinant proteins containing
- an immunoglobulin domain is a peptide consisting of about 100 amino acid residues having at least two cysteine residues and having an amino acid sequence similar to that of immunoglobulins.
- the immunoglobulin domain also includes polypeptides containing multiple immunoglobulin domains as the above minimum units. Immunoglobulin domains include, for example, VH, CH1, CH2 and CH3 of immunoglobulin heavy chains, and VL and CL of immunoglobulin light chains.
- the animal species for immunoglobulins is not particularly limited, but humans are preferred.
- the subclass of the constant region of the immunoglobulin heavy chain may be any of IgD, IgM, IgG1, IgG2, IgG3, IgG4, IgA1, IgA2 and IgE, preferably IgG-derived and IgM-derived.
- the constant region subclass of immunoglobulin light chains may be either ⁇ or ⁇ .
- Immunoglobulin domains are also present in proteins other than immunoglobulins, including proteins belonging to the immunoglobulin superfamily such as major histocompatibility antigen (MHC), CD1, B7 and T cell receptor (TCR). is mentioned. Any immunoglobulin domain can be applied as the immunoglobulin domain used for the bispecific antibody of the present invention.
- MHC major histocompatibility antigen
- CD1, B7 CD1, B7 and T cell receptor (TCR).
- CH1 refers to the region having the 118th to 215th amino acid sequence indicated by the EU index.
- CH2 refers to the region having the 231st to 340th amino acid sequence indicated by the EU index of Kabat et al.
- CH3 refers to the region having the 341st to 447th amino acid sequence indicated by the EU index of Kabat et al.
- a highly flexible amino acid region called a hinge region (hereinafter also referred to as hinge) exists between CH1 and CH2.
- Hinge region refers to the region having amino acid sequence 216 to 230 as indicated by the EU index of Kabat et al.
- CL is a region having an amino acid sequence from 108th to 214th indicated by Kabat numbering in the case of a human antibody ⁇ chain, and a region having an amino acid sequence from 108th to 215th in the case of a ⁇ chain. respectively.
- the antigen-binding domain that binds to CD131 contained in the bispecific antibody of the present invention refers to an antigen-binding domain that specifically recognizes and binds to the extracellular region of CD131.
- the antigen-binding domain that binds to CD116 contained in the bispecific antibody of the present invention refers to an antigen-binding domain that specifically recognizes and binds to the extracellular region of CD116.
- the bispecific antibody of the present invention may have an antibody Fc region in addition to the antigen-binding domain that binds to CD116 and the antigen-binding domain that binds to CD131.
- the Fc region is preferably of the IgG1 or IgG4 subclass, and more preferably contains the amino acid residue substitutions shown below.
- the Fc region When the Fc region is an IgG1 subclass, it preferably contains amino acid residue substitutions of L234A, L235A and G237A represented by the EU index, and H435F represented by the EU index in addition to these amino acid residue substitutions It is more preferred to include amino acid residue substitutions of (2) When the Fc region is of the IgG4 subclass, it preferably contains amino acid residue substitutions of S228P, L235E and R409K represented by the EU index, and in addition to these amino acid residue substitutions H435F represented by the EU index It is more preferred to include amino acid residue substitutions of
- the antigen-binding domain may be a single chain or a multimer consisting of multiple polypeptide chains, as long as it has antigen-binding ability to CD131 or CD116.
- Antigen-binding domains include, for example, antibodies, antibody fragments, or partial fragments of GM-CSF that bind to CD131 or CD116.
- antigen-binding domains preferably include VH and VL, which contain the CDRs of antibodies that bind to each antigen (CD131 or CD116).
- Antigen-binding domains that bind to CD131 in the present invention include antigen-binding domains that are any one selected from (1a) to (1e) below.
- Antigen-binding domains that bind to CD131 in the present invention more specifically include any one selected from the following (1A) to (1E).
- (1E) VH containing the amino acid sequence represented by SEQ ID NO: 29 and SEQ ID NO: 30 contains a VL containing the amino acid sequence represented
- the antigen-binding domain that binds to CD116 in the present invention is, for example, any one antigen-binding domain selected from (2a) to (2q) and (2r-1) to (2r-12) below. are mentioned.
- 2b VH comprising CDRs 1-3 comprising amino acid sequences represented by SEQ ID NOs: 37-39, respectively, and VL comprising CDRs 1-3 comprising amino acid sequences represented by SEQ ID NOs: 40-42, respectively
- (2r-3) CDR1 comprising the amino acid sequence represented by SEQ ID NO: 137, including the VL containing ⁇ 3, a modification was introduced to replace arginine at position 9 with threonine in the amino acid sequence represented by SEQ ID NO: 138 a VH comprising a CDR2 comprising an amino acid sequence and a CDR3 comprising an amino acid sequence represented by SEQ ID NO: 139; (2r-4) CDR1 containing the amino acid sequence represented by SEQ ID NO: 137, including VL containing CDRs 1 to 3 containing the amino acid sequences represented by sequence numbers 88 to 90, in the amino acid sequence represented by SEQ ID NO: 138 A VH comprising a CDR3 comprising an amino acid sequence represented by CDR2 and SEQ ID NO: 139 containing an amino acid sequence in which a modification was introduced to replace phenylalanine at position 2 with leucine and arginine at position 9 with threonine, and SEQ ID NO: 88, respectively (2r-
- VL comprising CDR1-3 comprising amino acid sequences represented by SEQ ID NOS: 88-90, respectively CDR1 comprising the amino acid sequence represented by SEQ ID NO: 137, represented by SEQ ID NO: 138
- CDR2 containing an amino acid sequence and an amino acid sequence in which modifications have been introduced to replace the second leucine of the amino acid sequence represented by SEQ ID NO: 139 with glutamic acid, the fifth tyrosine with tryptophan, and the sixth tyrosine with methionine.
- the second leucine in the amino acid sequence represented by SEQ ID NO:137 is replaced by phenylalanine , CDR1 containing an amino acid sequence in which a modification was introduced to replace the 3rd serine with alanine and the 4th methionine with leucine, CDR2 containing the amino acid sequence represented by SEQ ID NO: 138 and SEQ ID NO: 139
- the antigen-binding domain that binds to CD116 in the present invention is any one selected from the following (2A) to (2Y) and (2Z-1) to (2Z-20): are mentioned.
- (2J) an amino acid sequence represented by SEQ ID NO:96 comprising a VL containing an amino acid sequence represented by SEQ ID NO:30 and VL comprising the amino acid sequence represented by SEQ ID NO: 30
- (2M) a VH comprising the amino acid sequence represented by SEQ ID NO: 99 comprising a VL comprising the amino acid sequence represented by SEQ ID NO: 30, and (2N) a VH containing the amino acid sequence represented by SEQ ID NO: 100, and a VL containing the amino acid sequence represented by SEQ ID NO: 30
- the structure of the bispecific antibody of the present invention is not particularly limited as long as it contains a first antigen-binding domain and a second antigen-binding domain. is preferably
- first antigen-binding domain when the first antigen-binding domain is Fab, it is referred to as first Fab, and when the second antigen-binding domain is Fab, it is referred to as second Fab.
- the first Fab preferably comprises a heavy chain of the first antigen-binding domain comprising VH and CH1 domains (hereinafter abbreviated as the heavy chain of the first Fab) and a light chain comprising VL and CL
- second Fab preferably comprises a second binding domain heavy chain comprising VH and CH1 domains (hereinafter abbreviated as second Fab heavy chain) and a light chain comprising VL and CL.
- Examples of the structure of the bispecific antibody of the present invention include structures shown in (1) to (3) below.
- a structure in which the C-terminus of the chain and the C-terminus of the heavy chain in the second Fab are respectively linked to the N-terminus of the hinge region hereinafter also abbreviated as IgG type.
- the IgG-type bispecific antibody preferably further comprises an Fc region and has a structure in which the N-terminus of the Fc region is bound to the C-terminus of the hinge region.
- FIG. (2) A schematic diagram of such an IgG-type bispecific antibody is shown in FIG. (2) comprising the following first polypeptide, the following second polypeptide, and a hinge region, wherein the C-terminus of the first polypeptide and the C-terminus of the second polypeptide are each at the N-terminus of the hinge region structure that binds.
- First polypeptide A polypeptide comprising at least a first Fab (VH 1 -CH1, VL-CL) at the N-terminus.
- Second polypeptide A polypeptide comprising at least a second Fab (VH 2 -CH1′, VL-CL) at the C-terminus.
- the antigen-binding properties of the first Fab in the first polypeptide and the antigen-binding properties of the second Fab in the second polypeptide are retained.
- first polypeptide comprising the first Fab and the second Fab in order from the N-terminus
- second polypeptide comprising the first Fab and the second Fab in order from the N-terminus
- a structure containing a hinge region the first and second polypeptides are respectively the C-terminus of the heavy chain (VH 1 -CH1) in the first Fab and the heavy chain (VH 2 -CH1' ) to the N-terminus of the hinge region directly or via a linker (VH 1 -CH1-VH 2 -CH1′), and the C-terminus of the polypeptide chain is connected to the N-terminus of the hinge region, respectively.
- the N-terminal bispecific antibody preferably further comprises an Fc region and has a structure in which the N-terminus of the Fc region is bound to the C-terminus of the hinge region.
- a schematic diagram of such an N-terminal bispecific antibody is shown in FIG. 4(A).
- One specific embodiment includes, for example, the GM408WT (2 ⁇ 2) shown in FIG. (2-2) A structure comprising a first polypeptide comprising a first Fab and a second Fab in order from the N-terminus, a second polypeptide comprising the second Fab, and a hinge region.
- the first polypeptide is directly connected to the C-terminus of the heavy chain (VH 1 -CH1) in the first Fab and the N-terminus of the heavy chain (VH 2 -CH1′) in the second Fab. or comprising polypeptide chains (VH 1 -CH1-VH 2 -CH1′) linked via linkers.
- One specific embodiment is, for example, the GM408v8 (2 ⁇ 1) shown in FIG.
- (2-3) a first polypeptide comprising the first Fab and the second Fab in order from the N-terminus, a second polypeptide comprising the second Fab and the second Fab in order from the N-terminus, and A structure containing a hinge region and having a mutation introduced into VH2 that deactivates the second antigen-binding activity of the second Fab on the N-terminal side of the second polypeptide.
- the first polypeptide is directly connected to the C-terminus of the heavy chain (VH 1 -CH1) in the first Fab and the N-terminus of the heavy chain (VH 2 -CH1′) in the second Fab.
- the second polypeptide is such that the C-terminus of the heavy chain (VH 2 -CH1) in the second Fab and the N-terminus of the heavy chain (VH 2 -CH1′) in the second Fab are directly connected or via a linker. It includes polypeptide chains (VH 2 -CH1-VH 2 -CH1′) linked via. In such an embodiment, it is preferable to further include an Fc region and a structure in which the N-terminus of the Fc region is bound to the C-terminus of the hinge region.
- (2-4) The structure of (2-1) above, in which a mutation is introduced into VH 1 that inactivates the binding activity to the second antigen of the second Fab in the second polypeptide.
- One specific embodiment includes, for example, GM408v2 (1 ⁇ 2) shown in FIG. (2-5)
- a mutation that deactivates the binding activity to the second antigen of the second Fab in the first polypeptide was introduced into VH 2 of the heavy chain.
- One specific embodiment includes, for example, GM408v3 (1 ⁇ 1) shown in FIG.
- the mutations introduced into VH 2 of the heavy chain for inactivating the binding activity to the second antigen of the second Fab include, for example, D31A and Y98A. mentioned.
- the N-terminal bispecific antibody (2) is preferable from the viewpoint of improving the agonist activity against the GM-CSF receptor.
- the linker used for chemically linking the antigen-binding domains is not particularly limited as long as it has a functional group necessary for chemically linking the antigen-binding domains.
- Linkers having CH 2 CH 2 O)n- are preferred.
- the repeating number n is preferably an integer of 1-100, more preferably an integer of 1-25.
- the linker used preferably contains an alkynyl group.
- Huisgen [3+2] cycloaddition reaction can be used as a reaction to chemically link the antigen-binding domain and the linker.
- the peptide linker of the bispecific antibody which is expressed as a recombinant protein by connecting antigen-binding domains with an appropriate peptide linker amino acid sequence, is not particularly limited. Examples include so-called GS linkers, linkers containing immunoglobulin domains or fragments thereof, etc., but linkers consisting of any amino acid sequence can be used as long as they can be expressed as a recombinant protein.
- the first antigen-binding domain is an antigen-binding domain that binds to CD131
- the second antigen-binding domain is preferably an antigen-binding domain that binds to CD116.
- the first antigen-binding domain and the second antigen-binding domain are each Fab
- the first Fab is an antigen-binding domain that binds to CD131
- the second Fab is an antigen-binding domain that binds to CD116 is preferred.
- the first Fab is one selected from the group consisting of the following (1a) to (1e)
- the second Fab is the following (2a) Bispecific antibodies that are one selected from the group consisting of ⁇ (2q) and (2r-1) ⁇ (2r-12).
- VH containing CDR3 and VL containing CDR1-3 containing amino acid sequences represented by SEQ ID NOS: 88-90, respectively (2r-7)
- the second leucine in the amino acid sequence represented by SEQ ID NO: 137 is replaced with phenylalanine VH comprising CDR1 containing an amino acid sequence in which a modification was introduced to replace the third serine with alanine, CDR2 containing the amino acid sequence represented by SEQ ID NO: 138, and CDR3 containing the amino acid sequence represented by SEQ ID NO: 139 , and (2r-8) containing a VL containing CDRs 1 to 3 containing the amino acid sequences represented by SEQ ID NOS: 88 to 90, respectively.
- VH comprising CDR1 comprising an amino acid sequence in which a modification was introduced to replace methionine with leucine
- CDR2 comprising the amino acid sequence represented by SEQ ID NO: 138
- CDR3 comprising the amino acid sequence represented by SEQ ID NO: 139
- SEQ ID NO: 137 the 2nd leucine in the amino acid sequence represented by SEQ ID NO: 137 is replaced with tyrosine
- the 3rd serine is replaced with alanine.
- VH comprising CDR1 comprising an amino acid sequence introduced with a modification to replace with, CDR2 comprising an amino acid sequence represented by SEQ ID NO: 138 and CDR3 comprising an amino acid sequence represented by SEQ ID NO: 139, and SEQ ID NO: 88 to (2r-10) CDR1 comprising the amino acid sequence represented by SEQ ID NO: 137, CDR2 comprising the amino acid sequence represented by SEQ ID NO: 138 and SEQ ID NO: VH comprising CDR3 comprising an amino acid sequence in which the second leucine in the amino acid sequence represented by 139 is replaced with glutamic acid, and CDR1 to 3 comprising the amino acid sequences represented by SEQ ID NOs: 88 to 90, respectively (2r-11) CDR1 comprising the amino acid sequence represented by SEQ ID NO: 137, CDR2 comprising the amino acid sequence represented by SEQ ID NO: 138 and the second leucine of the amino acid sequence represented by SEQ ID NO: 139 to glutamic acid, the 5th tyros
- the first Fab is one selected from the group consisting of (1A) to (1E) below
- the second Fab is Examples include bispecific antibodies selected from the group consisting of (2A) to (2Y) and (2Z-1) to (2Z-20) below.
- Tables 1 to 3 to be described later show the clone names of Fabs that bind to CD131 or CD116, and the sequence numbers of the VH, VL, and CDR amino acid sequences contained therein. Henceforth, when clone names are used, they refer to Fabs or antibodies containing these VH and VL amino acid sequences.
- bispecific antibody or bispecific antibody fragment of the present invention for example, a first Fab and 116-08, 116-09, 116-18, 116-21, 116-22, 116-398, 116-412, 116-412a, 116-413, 116-413a, 116-421, 116-421a , 116-433, 116-433a, 116-435, 116-439, 116-463, 116-463a, 116-464, 116-464a, 116-465, 116-465a, 116-466, 116-466a or 116 and a second Fab comprising the VH and VL of -408, and a bispecific antibody or fragment thereof.
- These bispecific antibodies or said bispecific antibody fragments are preferably N-terminal.
- the bispecific antibody of the present invention is not limited to the following, for example, any one selected from the group consisting of the following (x1) ⁇ (x12) and (x13-1) ⁇ (x13-12) be done.
- the first antigen-binding domain and the second antigen-binding domain are the first Fab and the second Fab, respectively. is preferred.
- a bispecific antibody (x2) comprising a VL comprising CDRs 1-3 comprising a sequence, a VH comprising CDRs 1-3 wherein said first antigen-binding domain comprises the amino acid sequences represented by SEQ ID NOS: 85-87, respectively, and each VL comprising CDRs 1-3 comprising amino acid sequences represented by SEQ ID NOs: 88-90, and CDRs 1-3 comprising amino acid sequences wherein the second antigen-binding domains are represented by SEQ ID NOs: 107-109, respectively
- a bispecific antibody (x3) comprising a VH and a VL comprising CDRs 1-3 comprising amino acid sequences represented by SEQ ID NOs: 88-90, respectively, wherein said first antigen-binding domains are represented by SEQ ID NOs: 85-87, respectively and a VH comprising CDR1-3 comprising an amino acid sequence represented by SEQ ID NO: 88-90, respectively, and a VL comprising CDR1-3 comprising an amino acid
- VH comprising CDR1-3 wherein the second antigen-binding domain comprises amino acid sequences represented by SEQ ID NOs: 113-115, respectively, and CDR1-3, each comprising amino acid sequences represented by SEQ ID NOs: 88-90 a bispecific antibody (x5) comprising a VL comprising 3, a VH comprising CDRs 1-3 wherein said first antigen-binding domain comprises the amino acid sequences represented by SEQ ID NOs: 85-87, respectively, and SEQ ID NOs: 88-90, respectively and a VL comprising CDRs 1-3 comprising an amino acid sequence represented by, and wherein the second antigen-binding domains are SEQ ID NOS: 116-1, respectively
- VH comprising CDR1-3 comprising the amino acid sequences represented by SEQ ID NOS: 85-87, respectively, and VL comprising CDR1-3 comprising the amino acid sequences represented by SEQ ID NOS: 88-90, respectively and a VH comprising CDRs 1 to 3 in which the second antigen-binding domain comprises the amino acid sequences represented by SEQ ID NOs: 119 to 121, respectively, and CDRs 1 to 3 comprising the amino acid sequences represented by SEQ ID NOs: 88 to 90, respectively.
- a bispecific antibody (x9) comprising a VH comprising CDRs 1-3 comprising amino acid sequences and a VL comprising CDRs 1-3 comprising amino acid sequences represented by SEQ ID NOs: 88-90, respectively, wherein the first antigen-binding domain is A VH comprising CDR1-3 comprising amino acid sequences represented by SEQ ID NOs:85-87, respectively, and a VL comprising CDR1-3 comprising amino acid sequences represented by SEQ ID NOs:88-90, respectively, and the second VH comprising CDR1-3, each of which has an antigen-binding domain comprising amino acid sequences represented by SEQ ID NOs: 128-130, and VL comprising CDR1-3, each comprising amino acid sequences represented by SEQ ID NOs: 88-90 , a bispecific antibody (x10) wherein the first antigen-binding domain comprises an amino acid sequence represented by SEQ ID NOs: 85-87, respectively VH comprising DR1-3, and VL comprising CDR1-3 comprising amino
- a bispecific antibody (x11) comprising a VH comprising CDRs 1 to 3 comprising an amino acid sequence represented by SEQ ID NOS: 88 to 90, and a VL comprising CDRs 1 to 3 comprising amino acid sequences represented by SEQ ID NOS: 88 to 90, respectively, the first antigen-binding domain VH comprising CDR1-3 comprising amino acid sequences represented by SEQ ID NOS: 85-87, respectively, and VL comprising CDR1-3 comprising amino acid sequences represented by SEQ ID NOS: 88-90, respectively, and A VH comprising CDRs 1 to 3 in which two antigen-binding domains each comprise the amino acid sequences represented by SEQ ID NOs: 134 to 136, and a VL comprising CDRs 1 to 3 each comprising the amino acid sequences represented by SEQ ID NOs: 88 to 90.
- a bispecific antibody wherein the first antigen-binding domain comprises CDRs 1-3 comprising amino acid sequences represented by SEQ ID NOs: 85-87, respectively, and amino acids represented by SEQ ID NOs: 88-90, respectively a VH comprising CDR1-3 comprising a VL comprising CDR1-3 comprising a sequence, and said second antigen-binding domain comprising an amino acid sequence represented by SEQ ID NOS: 137-139, respectively; and SEQ ID NOS: 88-90, respectively
- a bispecific antibody (x13-1) comprising a VL comprising CDRs 1 to 3 comprising an amino acid sequence represented by CDRs 1 to 3 wherein the first antigen-binding domain comprises an amino acid sequence represented by SEQ ID NOS: 85 to 87, respectively and a VL comprising CDR1-3 comprising amino acid sequences represented by SEQ ID NOS: 88-90, respectively, and wherein the second antigen-binding domain comprises an amino acid sequence represented by SEQ ID NO: 137 CDR
- a bispecific antibody comprising a VL comprising CDRs 1-3, a VH comprising CDRs 1-3 wherein said first antigen-binding domain comprises the amino acid sequences represented by SEQ ID NOs: 85-87, respectively, and sequences, respectively
- a CDR1 comprising a VL comprising CDRs 1-3 comprising the amino acid sequences represented by numbers 88-90
- the second antigen-binding domain comprises the amino acid sequence represented by SEQ ID NO: 137, represented by SEQ ID NO: 138
- a VH comprising a CDR3 comprising an amino acid sequence represented by CDR2 and SEQ ID NO: 139 which contains an amino acid sequence in which the second phenylalanine in the amino acid sequence is replaced with leucine and the ninth arginine is replaced with threonine
- a bispecific antibody (x13-5) comprising a VL comprising CDRs 1-3 comprising amino acid sequences represented by SEQ ID NOs: 88-90, respectively, amino
- CDR1 containing the introduced amino acid sequence, the amino acid sequence represented by SEQ ID NO: 138 A bispecific antibody (x13- 9) VH comprising CDR1-3, wherein the first antigen-binding domain comprises amino acid sequences represented by SEQ ID NOs: 85-87, respectively, and CDR1-3 comprising amino acid sequences represented by SEQ ID NOs: 88-90, respectively and the second antigen-binding domain is an amino acid sequence in which a modification was introduced to replace the second leucine with tyrosine and the third serine with alanine in the amino acid sequence represented by SEQ ID NO: 137 VH comprising CDR1 comprising the amino acid sequence represented by SEQ ID NO: 138, CDR2 comprising the amino acid sequence represented by SEQ ID NO: 139 and CDR3 comprising the amino acid sequence represented by SEQ ID NO: 139, and CDR1 ⁇ comprising the amino acid sequences represented by SEQ ID NOS: 88 to 90, respectively a bispecific antibody (x13-10) comprising
- the bispecific antibody of the present invention include any one selected from the following (y1) to (y12) and (y13-1) to (y13-20).
- the first antigen-binding domain and the second antigen-binding domain are the first Fab and the second Fab, respectively. is preferred.
- the first antigen-binding domain comprises a VH comprising the amino acid sequence represented by SEQ ID NO: 29, and a VL comprising the amino acid sequence represented by SEQ ID NO: 30, and the second antigen-binding domain comprises A bispecific antibody (y2) comprising a VH comprising the amino acid sequence represented by SEQ ID NO: 175 and a VL comprising the amino acid sequence represented by SEQ ID NO: 30, wherein the first antigen-binding domain is represented by SEQ ID NO: 29 and a VH comprising a VL comprising the amino acid sequence represented by SEQ ID NO: 30, and wherein the second antigen-binding domain comprises the amino acid sequence represented by SEQ ID NO: 176, and SEQ ID NO: a bispecific antibody (y3) comprising a VL comprising an amino acid sequence represented by 30, a VH comprising an amino acid sequence wherein the first antigen-binding domain is represented by SEQ ID NO: 29, and an amino acid represented by SEQ ID NO: 30
- a bispecific antibody ( y4) the
- the first antigen-binding domain comprises VH comprising the amino acid sequence represented by SEQ ID NO: 29, and the VL comprising the amino acid sequence represented by SEQ ID NO: 30, and the second antigen-binding domain comprises SEQ ID NO: 194.
- a bispecific antibody (y13-6) comprising a VH comprising the amino acid sequence represented by SEQ ID NO:30 and a VL comprising the amino acid sequence represented by SEQ ID NO:30, wherein the first antigen-binding domain is represented by SEQ ID NO:29 VH comprising the sequence, and VL comprising the amino acid sequence represented by SEQ ID NO: 30, and wherein the second antigen-binding domain comprises the amino acid sequence represented by SEQ ID NO: 195, and SEQ ID NO: 30
- a bispecific antibody (y13-7) comprising a VL comprising the amino acid sequence represented by VH wherein the first antigen-binding domain comprises the amino acid sequence represented by SEQ ID NO: 29, and an amino acid represented by SEQ ID NO: 30
- the bispecific antibody or the bispecific antibody fragment of the present invention preferably the first Fab containing 131-B2, 116-398, 116-412a, 116-413a, 116-421a, 116-433a, 116- and a second Fab comprising 435, 116-439, 116-463a, 116-464a, 116-465a, 116-466a or 116-408, or a bispecific antibody fragment thereof.
- the C-terminus of the heavy chain in the first Fab and the N-terminus of the heavy chain in the second Fab are linked directly or via a linker. and a hinge region, wherein the C-termini of the two polypeptide chains are each linked to the N-terminus of the hinge region, or a bispecific antibody fragment thereof
- Examples include bispecific antibodies or bispecific antibody fragments in which the first Fab and the second Fab are any one of (z1) to (z12) below.
- bispecific antibody or the bispecific antibody fragment of the present invention specifically, for example, as shown in FIG . CH1) and the N-terminus of the heavy chain (VH 2 -CH1′) in the second Fab are linked directly or via a linker to the polypeptide chain (VH 1 -CH1-VH 2 -CH1′ ), wherein the C-terminus of the polypeptide chain is bound to the N-terminus of the hinge region, and the N-terminus of the Fc region (CH2-CH3) is bound to the C-terminus of the hinge region (VH 1 -CH1 -VH 2 -CH1′-CH2-CH3) and 4 light chains (VL-CL), in which VH 1 is preferably SEQ ID NO: 21, 23, 25, 27 and 29, more preferably the amino acid sequence represented by SEQ ID NO: 29, and VH 2 comprises the amino acid sequence represented by any one of SEQ ID NOS: 175-186 is preferred.
- VH 1 is preferably SEQ ID NO: 21, 23, 25, 27 and 29, more
- (VH 1 -CH1-VH 2 ) in the heavy chain (VH 1 -CH1-VH 2 -CH1′-CH2- CH3 ) is the following (v1) to (v12) and (v13-1) to Any one selected from (v13-20) is preferable.
- (CH1'-CH2-CH3) in the heavy chain preferably contains the amino acid sequence represented by any one of SEQ ID NOS: 145-172.
- VL in the light chain (VL-CL) contains the amino acid sequence represented by SEQ ID NO:30.
- the bispecific antibodies of the present invention also include bispecific antibodies that compete with any of the above bispecific antibodies in binding to CD116 and/or CD131.
- the bispecific antibody of the present invention includes a bispecific antibody that recognizes the same epitope as the CD116 and / or CD131 epitope recognized by any of the above bispecific antibodies, CD116 that any of the above bispecific antibodies recognizes, and / or a bispecific antibody that recognizes part of the epitope of CD131, Also included are bispecific antibodies that recognize epitopes that include epitopes of CD116 and/or CD131 that any of the above bispecific antibodies recognize.
- the bispecific antibody of the present invention may or may not have effector activity attributed to the antibody constant region, but preferably does not have effector activity.
- Effector activity refers to antibody-dependent cytotoxicity activity induced via the Fc region of an antibody, for example, antibody-dependent cellular cytotoxicity activity (ADCC activity), complement-dependent cytotoxicity Activity (Complement-Dependent Cytotoxicity; CDC activity), Antibody-dependent cellular phagocytosis activity (ADCP activity) by phagocytic cells such as macrophages and dendritic cells, and opsonic effects.
- ADCC activity antibody-dependent cellular cytotoxicity activity
- CDC activity complement-dependent cytotoxicity Activity
- ADCP activity Antibody-dependent cellular phagocytosis activity
- ADCP activity Antibody-dependent cellular phagocytosis activity
- ADCC activity and CDC activity in the present invention can be measured using a known measurement method [Cancer Immunol. Immunother., 36, 373 (1993)].
- ADCC activity means that the antibody bound to the antigen on the target cell activates immune cells (such as natural killer cells) by binding to the Fc receptor of immune cells via the Fc region of the antibody, and damages the target cells. refers to the activity to
- FcR Fc receptor
- Each FcR corresponds to a subclass of antibodies, with IgG, IgE, IgA and IgM specifically binding to Fc ⁇ R, Fc ⁇ R, Fc ⁇ R and Fc ⁇ R, respectively.
- Fc ⁇ R has subtypes of Fc ⁇ RI (CD64), Fc ⁇ RII (CD32) and Fc ⁇ RIII (CD16), each of which has an isoform of Fc ⁇ RIA, Fc ⁇ RIB, Fc ⁇ RIC, Fc ⁇ RIIA, Fc ⁇ RIIB, Fc ⁇ RIIC, Fc ⁇ RIIIA and Fc ⁇ RIIIB. exists.
- Fc ⁇ RIIIB is specifically expressed on neutrophils and Fc ⁇ RIIIA is expressed on monocytes, natural killer cells (NK cells), macrophages and some T cells.
- NK cell-dependent ADCC activity is induced through antibody binding to Fc ⁇ RIIIA.
- CDC activity refers to the activity in which antibodies that bind to antigens on target cells activate a series of cascades (complement activation pathway) consisting of complement-related proteins in the blood and damage target cells. In addition, protein fragments generated by complement activation induce migration and activation of immune cells.
- the cascade of CDC activity is initiated by first binding of C1q to the Fc region and then to two serine proteases, C1r and C1s, forming the C1 complex.
- the CDC activity or ADCC activity of the bispecific antibody or antibody fragment of the present invention against antigen-expressing cells can be evaluated by a known measurement method [Cancer Immunol. Immunother., 36, 373 (1993)].
- the ADCC activity of the antibody can be increased or decreased.
- a bispecific antibody is expressed using host cells lacking the ⁇ 1,6-fucosyltransferase gene. By doing so, a bispecific antibody with high ADCC can be obtained.
- the antibody is expressed using host cells into which the ⁇ 1,6-fucosyltransferase gene has been introduced. A bispecific antibody with low ADCC activity can be obtained by allowing the
- ADCC activity and CDC activity can be increased or decreased by modifying amino acid residues in the Fc region of the bispecific antibody.
- the Fc region amino acid sequences described in US Patent Application Publication No. 2007/0148165 can be used to increase the CDC activity of a bispecific antibody.
- CDC activity can be increased or decreased.
- the stability of the bispecific antibody of the present invention can be evaluated by measuring the amount of aggregates (oligomers) formed in the purification process or in samples stored under certain conditions. That is, when the amount of aggregates decreases under the same conditions, the stability of the antibody is evaluated as improved.
- the amount of aggregates can be measured by separating aggregated and non-aggregated antibodies using suitable chromatography, including gel filtration chromatography.
- the productivity of the bispecific antibody of the present invention can be evaluated by measuring the amount of antibody produced in the culture medium from antibody-producing cells. More specifically, it can be evaluated by measuring the amount of antibody contained in the culture supernatant obtained by removing the producing cells from the culture medium by an appropriate method such as HPLC method or ELISA method.
- an antibody fragment is a protein that contains an antigen-binding site and has antigen-binding activity against the antigen.
- Examples include Fab, Fab', F(ab') 2 , scFv, Diabody, dsFv, VHH, or peptides containing CDRs.
- Fab is a fragment obtained by treating an IgG antibody with a proteolytic enzyme papain (cleaved at the 224th amino acid residue of the H chain), about half of the N-terminal side of the H chain and the entire L chain are disulfides It is an antibody fragment having antigen-binding activity and having a molecular weight of about 50,000, bound by a bond (SS bond).
- F(ab′) 2 is a fragment obtained by treating IgG with the protease pepsin (cleaved at the 234th amino acid residue of the H chain). It is an antibody fragment having antigen-binding activity with a molecular weight of about 100,000, which is slightly larger than that conjugated with a protein.
- Fab' is an antibody fragment having a molecular weight of about 50,000 and having antigen-binding activity, which is obtained by cleaving the S—S bond of the hinge region of F(ab') 2 described above.
- scFv is a VH-P-VL or VL-P-VH polypeptide in which one VH and one VL are linked using an appropriate peptide linker (P) of 12 residues or more, and antigen binding It is an active antibody fragment.
- P peptide linker
- Diabody is an antibody fragment in which scFv having the same or different antigen-binding specificities form a dimer, and is an antibody fragment having bivalent antigen-binding activity against the same antigen or specific antigen-binding activity against different antigens. is.
- a dsFv is a polypeptide in which one amino acid residue in each of VH and VL is substituted with a cysteine residue and bound via an S—S bond between the cysteine residues.
- VHH also called nanobody
- VHH refers to the heavy chain variable region in VHH antibodies, which can bind to antigens in the absence of other polypeptides.
- a VHH antibody is an antibody that exists in camelid animals such as alpacas and cartilaginous fish such as sharks, and consists only of heavy chains without light chains and CH1.
- a CDR-containing peptide comprises at least one region of a VH or VL CDR.
- Peptides containing multiple CDRs can be produced by linking the CDRs directly or via an appropriate peptide linker.
- Peptides containing CDRs construct DNAs encoding the VH and VL CDRs of the bispecific antibody of the present invention, insert the DNAs into a prokaryotic expression vector or a eukaryotic expression vector, and convert the expression vector into a prokaryotic expression vector. It can be expressed and produced by introduction into an organism or eukaryote.
- Peptides containing CDRs can also be produced by chemical synthesis methods such as the Fmoc method or the tBoc method.
- a bispecific antibody fragment essentially consists of a partial structure of a bispecific antibody, and may be a fragment of any bispecific antibody as long as it has antigen-binding activity for two types of antigens. .
- a protein in which Fc is fused to the bispecific antibody or bispecific antibody fragment of the present invention, a fusion protein in which an antibody fragment is further bound thereto, an Fc fusion protein in which the Fc is bound to a naturally occurring ligand or receptor (immuno Adhesin), Fc fusion proteins in which multiple Fc regions are fused, etc. are also included in the bispecific antibodies of the present invention.
- an Fc region to which techniques for enhancing or deficient antibody effector activity, stabilizing antibodies, and controlling half-life in blood have been applied can also be used in the bispecific antibodies of the present invention.
- Techniques for controlling the blood half-life described above include, for example, a method of inhibiting antibody recycling by cleaving the binding to FcRn at pH 6.0.
- Methods for cleaving the binding to FcRn at pH 6.0 to inhibit antibody recycling include, for example, Ile at position 253, His at position 310, His at position 435 and His at position 436 represented by the EU index. It is preferable to introduce an amino acid residue modification into at least one selected from Tyr. Such modification specifically includes, for example, H435F.
- FcRn does not bind to the Fc region outside the cell (pH 7.0-7.5), but binds to the IgG taken into the cell in the early endosome (pH 6.0) and recycles the IgG outside the cell.
- the bispecific antibody or the bispecific antibody fragment of the present invention may be chemically treated with a radioactive isotope, a low-molecular-weight drug, a high-molecular-weight drug, a protein or an antibody drug, or the like. or genetically engineered derivative of the antibody.
- bispecific antibodies of the present invention include the N-terminal side or C-terminal side of the bispecific antibody or bispecific antibody fragment of the present invention, suitable substituents or side chains in the bispecific antibody or bispecific antibody fragment thereof.
- the sugar chains in the bispecific antibody or the bispecific antibody fragment thereof may be chemically treated with radioactive isotopes, low-molecular-weight drugs, high-molecular-weight drugs, immunostimulants, proteins or antibody drugs, etc. [antibody engineering] Introduction, Jijin Shokan (1994)].
- the bispecific antibody derivative of the present invention is obtained by linking the DNA encoding the bispecific antibody or the bispecific antibody fragment of the present invention with the DNA encoding the desired protein or antibody drug and inserting it into an expression vector. Then, the expression vector can be introduced into a suitable host cell and expressed by a genetic engineering technique.
- Radioisotopes include, for example, 111 In, 131 I, 125 I, 90 Y, 64 Cu, 99 Tc, 77 Lu or 211 At. Radioisotopes can be directly conjugated to antibodies, such as by the chloramine T method. Alternatively, a substance that chelates the radioisotope may be bound to the antibody. Chelating agents include, for example, 1-isothiocyanatobenzyl-3-methyldiethylenetriaminepentaacetic acid (MX-DTPA).
- low-molecular drugs examples include alkylating agents, nitrosourea agents, antimetabolites, antibiotics, plant alkaloids, topoisomerase inhibitors, hormone therapy agents, hormone antagonists, aromatase inhibitors, P-glycoprotein inhibitors, and platinum.
- anticancer agents such as M-phase inhibitors or kinase inhibitors [Clinical Oncology, Cancer and Chemotherapy (1996)]
- steroidal agents such as hydrocortisone or prednisone
- non-steroidal agents such as aspirin or indomethacin
- gold thiomalate gold thiomalate
- Immunomodulators such as penicillamine
- immunosuppressants such as cyclophosphamide or azathioprine
- anti-inflammatory agents such as antihistamines such as chlorpheniramine maleate or clemacitin [Inflammation and anti-inflammatory therapy, Ishiyaku Shuppan Co., Ltd. (1982) )] and the like.
- Anticancer agents include, for example, amifostine (ethol), cisplatin, dacarbazine (DTIC), dactinomycin, mechlorethamine (nitrogen mustard), streptozocin, cyclophosphamide, ifosfamide, carmustine (BCNU), lomustine (CCNU), doxorubicin.
- Methods for binding a low-molecular-weight drug to the bispecific antibody or bispecific antibody fragment of the present invention include, for example, binding between the amino groups of the drug and the antibody via glutaraldehyde, or water-soluble carbodiimide. and binding the amino group of the drug to the carboxyl group of the antibody via .
- Polymer drugs include polyethylene glycol (PEG), albumin, dextran, polyoxyethylene, styrene-maleic acid copolymer, polyvinylpyrrolidone, pyran copolymer, or hydroxypropylmethacrylamide.
- methods for binding PEG to the bispecific antibody of the present invention include a method of reacting with a PEG modification reagent [Bioconjugate Pharmaceuticals, Hirokawa Shoten (1993)].
- PEGylation modification reagents include modifiers for the ⁇ -amino group of lysine (Japanese Patent Laid-Open No. 61-178926), modifiers for the carboxyl groups of aspartic acid and glutamic acid (Japanese Patent Laid-Open No. 56-23587 Japanese Patent Application Laid-Open No. 2-117920), or modifiers for the guanidino group of arginine (Japanese Patent Application Laid-Open No. 2-117920).
- the immunostimulant may be a natural product known as an immunoadjuvant, and as a specific example, the immune-enhancing agent is ⁇ (1 ⁇ 3) glucan (e.g., lentinan or schizophyllan), or ⁇ -galactosylceramide ( KRN7000) and the like.
- the immune-enhancing agent is ⁇ (1 ⁇ 3) glucan (e.g., lentinan or schizophyllan), or ⁇ -galactosylceramide ( KRN7000) and the like.
- proteins include cytokines or growth factors that activate immunocompetent cells such as NK cells, macrophages or neutrophils, or toxin proteins.
- cytokines or growth factors examples include interferon (hereinafter referred to as IFN)- ⁇ , IFN- ⁇ , IFN- ⁇ , interleukin (hereinafter referred to as IL)-2, IL-12, IL-15, IL- 18, IL-21, IL-23, granulocyte colony stimulating factor (G-CSF), granulocyte/macrophage colony stimulating factor (GM-CSF) or macrophage colony stimulating factor (M-CSF).
- IFN interferon
- IFN- ⁇ interleukin-2
- IL-12 interleukin
- IL-15 interleukin
- IL-12 interleukin
- IL-15 interleukin- 18, IL-21
- IL-23 granulocyte colony stimulating factor
- G-CSF granulocyte colony stimulating factor
- GM-CSF granulocyte/macrophage colony stimulating factor
- M-CSF macrophage colony stimulating factor
- Toxin proteins include, for example, ricin, diphtheria toxin, and ONTAK, and also include protein toxins in which mutations are introduced into proteins to regulate toxicity.
- a fusion antibody with a protein or antibody drug is produced by linking the cDNA encoding the protein to the cDNA encoding the bispecific antibody or antibody fragment of the present invention, constructing the DNA encoding the fusion antibody, and transferring the DNA to prokaryotes or eukaryotes. It can be produced by inserting it into an expression vector for karyotes and introducing the expression vector into prokaryotes or eukaryotes.
- the agent that binds to the bispecific antibody of the present invention or an antibody fragment thereof may be a conventional immunological detection method.
- labels used in methods or assays.
- labels include enzymes such as alkaline phosphatase, peroxidase, or luciferase, luminescent substances such as acridinium esters or lofins, fluorescein isothiocyanate (FITC) or tetramethylrhodamine isothiocyanate (RITC), and Alexa (registered trademark).
- fluorescent substances such as Fluor 488 and R-phycoerythrin (R-PE).
- the present invention includes bispecific antibodies and bispecific antibody fragments having cytotoxic activity such as CDC activity or ADCC activity.
- cytotoxic activity such as CDC activity or ADCC activity.
- the CDC activity or ADCC activity of the bispecific antibody or the bispecific antibody fragment of the present invention against antigen-expressing cells can be evaluated by a known measurement method [Cancer Immunol. Immunother., 36, 373 (1993)].
- the present invention also provides a composition comprising a bispecific antibody or bispecific antibody fragment that specifically recognizes and binds CD116 and CD131, or a composition containing the bispecific antibody or the bispecific antibody fragment as an active ingredient, CD116 and CD131-related diseases, preferably diseases involving CD116- and CD131-expressing cells.
- the disease in which at least one of CD116 and CD131 is involved may be any disease in which at least one of CD116 and CD131 is involved. , various infectious diseases, Alzheimer's disease, diseases associated with neutralizing antibodies to GM-CSF, and the like.
- diseases associated with GM-CSF or diseases associated with neutralizing antibodies to GM-CSF include, for example, melanoma, head and neck cancer, breast cancer, gastrointestinal cancer, pancreatic cancer, hepatocellular carcinoma, and prostate cancer.
- Cancer colorectal cancer, lung cancer, renal cell cancer, ovarian cancer, chemotherapy-induced leukopenia, bone marrow transplant-induced leukopenia, aplastic anemia-induced leukopenia, myelodysplastic syndrome-induced leukopenia , recovery of bone marrow function in bone marrow transplantation, acute myelogenous leukemia, chronic myelomonocytic leukemia, sepsis, mycosis, HIV infection, influenza virus infection, non-tuberculous mycobacterial infection, acute respiratory distress syndrome, alveoli Examples include proteinosis and Crohn's disease.
- the therapeutic agent containing the bispecific antibody, the bispecific antibody fragment, or the derivative thereof of the present invention contains only the bispecific antibody, the bispecific antibody fragment, or the derivative thereof as an active ingredient. However, it is usually preferable to provide it as a pharmaceutical formulation prepared by any method known in the technical field of pharmaceutical science, mixed with one or more pharmacologically acceptable carriers.
- administration route that is most effective for treatment. mentioned. Among them, intravenous or transpulmonary administration is preferred.
- Dosage forms include, for example, inhalants, sprays, capsules, tablets, powders, granules, syrups, emulsions, suppositories, injections, ointments, and tapes.
- the dosage or frequency of administration varies depending on the desired therapeutic effect, administration method, treatment period, age and body weight, but it is usually 10 ⁇ g/kg to 10 mg/kg per day for adults.
- the present invention provides an immunological detection or measurement reagent for at least one of CD116 and CD131, or a disease associated with at least one of CD116 and CD131, which contains the bispecific antibody or bispecific antibody fragment of the present invention.
- it relates to diagnostic agents for diseases involving cells expressing CD116 and CD131.
- the present invention also provides a method for immunological detection or measurement of at least one of CD116 and CD131 using the bispecific antibody or the bispecific antibody fragment of the present invention, a disease associated with at least one of CD116 and CD131, Preferably, the present invention relates to a method for treating diseases involving CD116- and CD131-expressing cells, or a diagnostic method for diseases involving at least one of CD116 and CD131, preferably involving CD116- and CD131-expressing cells.
- Any known method can be used as a method for detecting or measuring the amount of at least one of CD116 and CD131 in the present invention. Examples thereof include immunological detection or measurement methods.
- An immunological detection or measurement method is a method of detecting or measuring the amount of antibody or antigen using a labeled antigen or antibody.
- Immunological detection or measurement methods include, for example, radioimmunoassay (RIA), enzyme immunoassay (EIA or ELISA), fluorescence immunoassay (FIA), luminescence immunoassay, Western blotting. Alternatively, a physicochemical method or the like may be used.
- disease associated with at least one of CD116 and CD131 preferably CD116 and CD131 Diseases involving expressing cells can be diagnosed.
- Suitable immunological detection methods can be used to detect cells expressing at least one of CD116 and CD131, such as immunoprecipitation, immunocytostaining, immunohistochemical staining or fluorescent antibody staining. law, etc.
- a fluorescent antibody staining method such as FMAT8100HTS system (manufactured by Applied Biosystems) can be used.
- Biological samples for which at least one of CD116 and CD131 is to be detected or measured in the present invention include, for example, tissue cells, blood, plasma, serum, pancreatic juice, urine, feces, tissue fluid, culture fluid, etc. There is no particular limitation as long as one of them may contain cells expressing the expression.
- the diagnostic agent containing the bispecific antibody, the bispecific antibody fragment, or the derivative thereof of the present invention includes a reagent for antigen-antibody reaction and a reagent for detecting the reaction, depending on the intended diagnostic method. It's okay.
- reagents for antigen-antibody reaction include buffers, salts and the like.
- Detection reagents include, for example, the bispecific antibody, the bispecific antibody fragment, or a labeled secondary antibody that binds to a derivative thereof, or a conventional immunological detection or measurement method such as a substrate corresponding to the label. reagents used for
- the method for producing the bispecific antibody of the present invention the method for evaluating the activity of the bispecific antibody or the bispecific antibody fragment, and the method for treating and diagnosing diseases using the bispecific antibody or the bispecific antibody fragment are specifically described. described as
- the method for producing a monoclonal antibody in the present invention includes the following working steps. Specifically, (1) at least one of purification of an antigen to be used as an immunogen and production of cells overexpressing the antigen on the cell surface, and (2) after immunizing an animal with the antigen, blood is collected and its antibody titer is assayed.
- myeloma myeloma
- cell fusion between antibody-producing cells and myeloma Selection of a group of hybridomas producing antibodies, (6) Separation (cloning) of monoclonal cells from the group of hybridomas, (7) In some cases, cultivation of hybridomas for large-scale production of monoclonal antibodies, or hybridomas (8) examination of the physiological activity and antigen-binding specificity of the monoclonal antibody thus produced, or testing of its properties as a labeling reagent;
- the method for producing the monoclonal antibody that binds to CD116 and the monoclonal antibody that binds to CD131, which is used to produce the bispecific antibody that binds to CD116 and CD131 in the present invention, will be described below in detail along the above steps.
- the method for producing the antibody is not limited to this, and for example, antibody-producing cells other than spleen cells and myeloma can be used.
- Antigen purification Cells expressing CD116 or CD131 can be obtained by introducing an expression vector containing cDNA encoding the full-length or partial length of CD116 or CD131 into Escherichia coli, yeast, insect cells, animal cells, or the like.
- at least one of CD116 and CD131 can be purified from various human tumor culture cells or human tissues expressing at least one of CD116 and CD131 in large amounts and used as an antigen.
- the cultured tumor cells, tissue, or the like can be used directly as an antigen.
- a synthetic peptide having a partial sequence of CD116 or CD131 can be prepared by a chemical synthesis method such as the Fmoc method or the tBoc method and used as an antigen.
- CD116 or CD131 used in the present invention can be obtained by methods described in Molecular Cloning, A Laboratory Manual, Second Edition, Cold Spring Harbor Laboratory Press (1989), Current Protocols In Molecular Biology, John Wiley & Sons (1987-1997), etc. etc., for example, by the following method, by expressing the DNA encoding the CD116 or CD131 in host cells.
- a recombinant vector is constructed by inserting a full-length cDNA containing a portion encoding CD116 or CD131 downstream of the promoter of an appropriate expression vector.
- a DNA fragment of appropriate length containing a portion encoding a polypeptide prepared based on full-length cDNA may be used.
- a transformant strain that produces CD116 or CD131 can be obtained.
- Any expression vector can be used as long as it is capable of autonomous replication or integration into the chromosome in the host cell used and contains an appropriate promoter at a position where the DNA encoding CD116 or CD131 can be transcribed. can be used.
- Any host cell that can express the gene of interest can be used, for example, microorganisms belonging to the genus Escherichia such as Escherichia coli, yeast, insect cells, or animal cells.
- the recombinant vector When a prokaryote such as E. coli is used as a host cell, the recombinant vector is capable of autonomous replication in the prokaryote and contains a promoter, a ribosome binding sequence, a DNA containing a portion encoding CD116 or CD131, and a transcription terminator.
- a vector containing the sequence is preferred.
- the recombinant vector does not necessarily have a transcription termination sequence, it is preferable to place a transcription termination sequence immediately below the structural gene.
- the recombinant vector may contain a gene controlling a promoter.
- the recombinant vector it is preferable to use a plasmid in which the distance between the Shine-Dalgarno sequence, which is the ribosome binding sequence, and the initiation codon is adjusted to an appropriate distance (eg, 6 to 18 bases).
- nucleotide sequence of the DNA encoding CD116 or CD131 nucleotides can be substituted so that the codons are optimal for expression in the host, thereby improving the production rate of the desired CD116 or CD131.
- Any expression vector can be used as long as it can exhibit its function in the host cell to be used.
- Pharmacia pSE280 (Invitrogen), pGEMEX-1 (Promega), pQE-8 (Qiagen), pKYP10 (Japanese Patent Laid-Open No. 58-110600), pKYP200 [Agricultural Biological Chemistry, 48, 669 (1984)], pLSA1 [Agric. Biol. Chem., 53, 277 (1989)], pGEL1 [Proc. Natl. Acad. ) (manufactured by Stratagene), pTrs30 [prepared from E.
- Any promoter can be used as long as it functions in the host cell used.
- promoters derived from E. coli or phage such as trp promoter (Ptrp), lac promoter, PL promoter, PR promoter or T7 promoter.
- Terp trp promoter
- lac promoter lac promoter
- PL promoter PL promoter
- PR promoter PR promoter
- T7 promoter T7 promoter
- artificially designed and modified promoters such as a tandem promoter in which two Ptrps are arranged in series, a tac promoter, a lacT7 promoter, or a let I promoter.
- E. coli XL1-Blue E. coli XL2-Blue
- E. coli DH1 E. coli MC1000
- E. coli KY3276 E. coli W1485, E. coli JM109, E. coli HB101
- E. coli No. 49 E. coli W3110, E. coli NY49, or E. coli DH5 ⁇ .
- any method for introducing a recombinant vector into a host cell any method can be used as long as it introduces DNA into the host cell to be used.
- a method using calcium ions Proc. Natl. Acad. Sci. USA, 69, 2110 (1972), Gene, 17, 107 (1982), Molecular & General Genetics, 168, 111 (1979)].
- any expression vector can be used as long as it functions in animal cells.
- Any promoter can be used as long as it can exhibit its function in animal cells.
- CMV cytomegalovirus
- IE immediate early gene promoter
- SV40 early promoter SV40 early promoter
- retrovirus promoter SV40 early promoter
- metallothionein promoter the metallothionein promoter
- the heat shock promoter the SR ⁇ promoter
- Moloney murine leukemia virus promoter or enhancer the enhancer of the IE gene of human CMV may be used together with the promoter.
- host cells examples include human Burkitt's lymphoma cells Namalwa, African green monkey kidney-derived cells COS, Chinese hamster ovary-derived cells CHO, and human leukemia cells HBT5637 (Japanese Patent Laid-Open No. 63-000299).
- Any method for introducing DNA into animal cells can be used as a method for introducing a recombinant vector into host cells.
- Japanese Patent Laid-Open No. 2-227075 Japanese Patent Laid-Open No. 2-227075
- the lipofection method Japanese Patent Laid-Open No. 2-227075
- Microorganisms carrying a recombinant vector containing a DNA encoding CD116 or CD131 obtained as described above, or transformants derived from animal cells or the like are cultured in a medium, and the CD116 and CD116 /or CD116 or CD131 can be produced by producing and accumulating CD131 and harvesting from the culture.
- a method for culturing the transformant in a medium can be carried out according to a conventional method used for culturing a host.
- CD116 or CD131 When expressed in eukaryotic cells, it is possible to obtain CD116 or CD131 with added sugars or sugar chains.
- an inducer may be added to the medium as necessary.
- an inducer may be added to the medium as necessary.
- culturing a microorganism transformed with a recombinant vector using a lac promoter, isopropyl- ⁇ -D-thiogalactopyranoside, etc. is transformed with a recombinant vector using a trp promoter.
- indole acrylic acid or the like may be added to each medium.
- Examples of media for culturing transformants obtained using animal cells as hosts include the commonly used RPMI1640 medium [The Journal of the American Medical Association, 199, 519 (1967)], Eagle's MEM medium [Science , 122, 501 (1952)], Dulbecco's modified MEM medium [Virology, 8, 396 (1959)], 199 medium [Proc. Soc. Exp. Biol. Med., 73, 1 (1950)], Iscove's Modified Examples thereof include Dulbecco's Medium (IMDM) medium, or a medium obtained by adding fetal bovine serum (FBS) or the like to these medium. Cultivation is usually carried out for 1-7 days under conditions such as pH 6-8, 30-40° C. in the presence of 5% CO 2 . In addition, antibiotics such as kanamycin and penicillin may be added to the medium during the culture, if necessary.
- RPMI1640 medium The Journal of the American Medical Association, 199, 519 (1967)]
- Methods for producing CD116 or CD131 include, for example, a method of producing it in the host cell, a method of secreting it outside the host cell, or a method of producing it on the extracellular membrane of the host cell. Alternatively, an appropriate method can be selected by changing the structure of CD131.
- DNA encoding the amino acid sequence of the extracellular region DNA encoding the Fc region of an antibody, DNA encoding glutathione S-transferase (GST), DNA encoding a FLAG tag, DNA encoding a Histidine tag, etc.
- GST glutathione S-transferase
- An antigen fusion protein can be produced by preparing a DNA that ligates the .
- Specific examples include Fc fusion proteins in which the extracellular domain of CD116 or CD131 is bound to the Fc region of human IgG, and fusion proteins between the extracellular domain of CD116 or CD131 and glutathione S-transferase (GST).
- CD116 or CD131 When CD116 or CD131 is produced in the host cell or on the host cell extracellular membrane, the method of Paulson et al. [J. Biol. Chem., 264, 17619 (1989)], the method of Row et al. [Proc. Sci., USA, 86, 8227 (1989), Genes Develop., 4, 1288 (1990)], Japanese Patent Laid-Open No. 05-336963, or International Publication No. 1994/23021. CD116 or CD131 can be actively secreted outside the host cell. In addition, a gene amplification system using a dihydrofolate reductase gene or the like (Japanese Patent Laid-Open No. 2-227075) can be used to increase the production of CD116 or CD131.
- the produced CD116 or CD131 can be isolated and purified, for example, as follows.
- CD116 or CD131 When CD116 or CD131 is expressed in a dissolved state in cells, the cells are collected by centrifugation after completion of the culture, suspended in an aqueous buffer, and treated with an ultrasonicator, French press, Mantongaurin homogenizer, Dynomill, or the like. to disrupt the cells using to obtain a cell-free extract.
- CD116 or CD131 forms an insoluble form in cells and is expressed
- the cells are collected and crushed in the same manner as described above, and centrifuged to collect the insoluble form of CD116 or CD131 as a precipitate fraction.
- the collected insoluble form of CD116 or CD131 is solubilized with a protein denaturant.
- the purified protein of the polypeptide can be obtained by the same isolation and purification method as described above.
- CD116 or CD131 or a derivative such as a sugar modification thereof When CD116 or CD131 or a derivative such as a sugar modification thereof is extracellularly secreted, the CD116 or CD131 or a derivative such as a sugar modification thereof can be recovered from the culture supernatant.
- a soluble fraction is obtained by treating the culture supernatant using a technique such as centrifugation in the same manner as described above, and a purified protein is obtained from the soluble fraction by using the same isolation and purification method as described above. be able to.
- CD116 or CD131 used in the present invention can also be produced by a chemical synthesis method such as the Fmoc method or the tBoc method.
- a chemical synthesis method such as the Fmoc method or the tBoc method.
- a peptide synthesizer manufactured by Advanced Chemtech, Perkin-Elmer, Pharmacia, Protein Technology Instrument, Synthecel-Vega, Perceptive, or Shimadzu Corporation. can be chemically synthesized using
- Animals such as mice, rats, hamsters, rabbits, cows, or alpacas are immunized with the antigen obtained in (1), and the spleen, lymph nodes, or peripheral blood of the animals Collect antibody-producing cells.
- animals include transgenic mice producing human-derived antibodies described in Tomizuka et al. [Tomizuka et al., Proc Natl Acad Sci USA., 97, 722 (2000)], immunogens
- a conditional knockout mouse of CD116 or CD131 is exemplified as an animal to be immunized.
- Immunization is performed by administering the antigen together with an appropriate adjuvant such as complete Freund's adjuvant or aluminum hydroxide gel and pertussis vaccine.
- Immunogen administration method for mouse immunization may be subcutaneous injection, intraperitoneal injection, intravenous injection, intradermal injection, intramuscular injection or footpad injection. is preferred.
- a conjugate with a carrier protein such as BSA (bovine serum albumin) or KLH (Keyhole Limpet Hemocyanin) is prepared and used as an immunogen.
- BSA bovine serum albumin
- KLH Keyhole Limpet Hemocyanin
- the antigen is administered 5-10 times at intervals of 1-2 weeks after the first administration.
- Blood is collected from the fundus venous plexus 3 to 7 days after each administration, and the antibody titer of the serum is measured using an enzyme immunoassay [Antibodies-A Laboratory Manual, Cold Spring Harbor Laboratory (1988)] or the like.
- an enzyme immunoassay Antibodies-A Laboratory Manual, Cold Spring Harbor Laboratory (1988)] or the like.
- tissue containing antibody-producing cells such as spleen is excised from the immunized animal, and antibody-producing cells are collected.
- Antibody-producing cells are plasma cells and their progenitor cells, lymphocytes, which may be obtained from any part of an individual, generally spleen, lymph nodes, bone marrow, tonsils, peripheral blood, or an appropriate combination thereof.
- lymphocytes which may be obtained from any part of an individual, generally spleen, lymph nodes, bone marrow, tonsils, peripheral blood, or an appropriate combination thereof.
- Spleen cells are most commonly used, although they can be obtained from other sources such as spleen cells.
- fusion antibody-producing cells are obtained by mincing the spleen, loosening it, centrifuging it, and removing red blood cells.
- Myeloma preparation process As myeloma, cells incapable of producing autoantibodies derived from mammals such as mice, rats, guinea pigs, hamsters, rabbits, and humans can be used. 8-azaguanine-resistant mouse (BALB/c-derived) myeloma cell line P3-X63Ag8-U1 (P3-U1) [Current Topics in Microbiology and Immunology, 18, 1 (1978)], P3- NS1/1-Ag41 (NS-1) [European J. Immunology, 6, 511 (1976)], SP2/0-Ag14 (SP-2) [Nature, 276, 269 (1978)], P3-X63-Ag8653 (653) [J.
- BALB/c-derived myeloma cell line P3-X63Ag8-U1 (P3-U1) [Current Topics in Microbiology and Immunology, 18, 1 (1978)], P3- NS1/1-Ag41 (NS-
- the cell line is grown in a suitable medium, such as 8-azaguanine medium [RPMI-1640 medium supplemented with glutamine, 2-mercaptoethanol, gentamicin, FCS and 8-azaguanine], Iscove's Modified Dulbecco's Medium (Iscove's Modified Dulbecco's Medium). Medium; hereinafter referred to as "IMDM”) or a medium such as Dulbecco's Modified Eagle Medium (hereinafter referred to as "DMEM").
- IMDM Iscove's Modified Dulbecco's Medium
- DMEM Dulbecco's Modified Eagle Medium
- the fusion antibody-producing cells obtained in (2) and the myeloma cells obtained in (3) were mixed in Minimum Essential Medium (MEM) medium or PBS (disodium phosphate 1.83 g, monopotassium phosphate 0 21 g, 7.65 g of sodium chloride, 1 liter of distilled water, pH 7.2), mixed with fusion antibody-producing cells: myeloma cells at a ratio of 5:1 to 10:1, and centrifuged. Remove the supernatant. After loosening the precipitated cell clumps, a mixture of polyethylene glycol-1000 (PEG-1000), MEM medium and dimethylsulfoxide is added at 37° C. with stirring.
- MEM Minimum Essential Medium
- PBS disodium phosphate 1.83 g, monopotassium phosphate 0 21 g, 7.65 g of sodium chloride, 1 liter of distilled water, pH 7.2
- MEM medium is added to bring the total volume to 50 mL. After centrifugation, the supernatant is removed, the precipitated cell clumps are loosened, and the cells are gently suspended in HAT medium [normal medium supplemented with hypoxanthine, thymidine and aminopterin]. This suspension is cultured for 7-14 days at 37° C. in a 5% CO 2 incubator.
- Cell fusion can also be performed by the following method. Spleen cells and myeloma cells were washed well with a serum-free medium (e.g., DMEM) or phosphate-buffered saline (hereinafter referred to as "phosphate buffer") so that the cell number ratio of spleen cells and myeloma cells was 5: Mix at a ratio of about 1 to 10:1 and centrifuge. After removing the supernatant and loosening the precipitated cell clumps well, 1 mL of serum-free medium containing 50% (w/v) polyethylene glycol (molecular weight 1000-4000) is added dropwise while stirring.
- a serum-free medium e.g., DMEM
- phosphate buffer phosphate-buffered saline
- HAT medium hypoxanthine-aminopterin-thymidine
- IL-2 human interleukin-2
- the medium is changed from HAT medium to medium without aminopterin (hereinafter referred to as HT medium). Thereafter, a portion of the culture supernatant can be collected, and antibody-producing hybridomas can be selected using the antibody titer measurement method described below.
- methods for measuring antibody titer include various known techniques such as radioisotope immunoassay (RIA method), enzyme-linked immunosorbent assay (ELISA method), fluorescent antibody method and passive hemagglutination method.
- RIA method radioisotope immunoassay
- ELISA method enzyme-linked immunosorbent assay
- fluorescent antibody method and passive hemagglutination method.
- the RIA method or the ELISA method is preferable from the viewpoints of detection sensitivity, rapidity, accuracy, possibility of automation of operation, and the like.
- hybridomas that are found to produce the desired antibody are transferred to another plate and cloned.
- this cloning method include a limiting dilution method in which one cell is diluted in one well of a plate and cultured, a soft agar method in which culture is performed in a soft agar medium and colonies are collected, and a micromanipulator. Examples include a method of isolating individual cells, a method of isolating a single cell by a cell sorter, and the like.
- cloning by limiting dilution is repeated 2 to 4 times, and those with stable antibody titers are selected as hybridoma strains that produce monoclonal antibodies against CD116 or CD131.
- large amounts of monoclonal antibodies that bind to CD116 or CD131 can be obtained by growing the hybridoma intraperitoneally in syngeneic mice (e.g., BALB/c) or Nu/Nu mice, rats, guinea pigs, hamsters, rabbits, or the like. Ascites containing fluid can be obtained.
- syngeneic mice e.g., BALB/c
- Nu/Nu mice rats, guinea pigs, hamsters, rabbits, or the like.
- Ascites containing fluid can be obtained.
- the monoclonal antibody-producing hybridoma obtained in (5) in RPMI1640 medium supplemented with 10% FBS After culturing the monoclonal antibody-producing hybridoma obtained in (5) in RPMI1640 medium supplemented with 10% FBS, the supernatant was removed by centrifugation, and GIT medium or Hybridoma-SFM supplemented with 5% Daigo GF21 was obtained. It is suspended in a medium or the like, and cultured for 3 to 7 days by flask culture, spinner culture, bag culture, or the like. The obtained cell suspension is centrifuged, the supernatant obtained is purified by a protein A column or a protein G column, and the IgG fraction is collected to obtain a purified monoclonal antibody.
- a commercially available monoclonal antibody purification kit eg, MAbTrap GII kit; manufactured by Amersham Pharmacia Biotech
- MAbTrap GII kit manufactured by Amersham Pharmacia Biotech
- Antibody subclass determination is performed by enzyme immunoassay using a subclass typing kit.
- Binding activity of monoclonal antibodies to CD116 or CD131 is determined by Ouchterlony method, ELISA method, RIA method, flow cytometry method (FCM) or surface plasmon resonance method (SPR). It can be measured by a binding assay system such as.
- the Ouchterlony method is simple, but if the antibody concentration is low, a concentration operation is required.
- the culture supernatant is allowed to react with the antigen-adsorbed solid phase as it is, and furthermore, antibodies corresponding to various immunoglobulin isotypes and subclasses are used as secondary antibodies to determine antibody isotypes and subclasses. As well as identifying the subclass, it is possible to measure the binding activity of the antibody.
- purified or partially purified recombinant CD116 or CD131 is adsorbed to a solid surface such as a 96-well plate for ELISA, and the solid surface to which no antigen is adsorbed is subjected to antigen-unrelated proteins such as Blocking is done with bovine serum albumin (BSA).
- BSA bovine serum albumin
- a serially diluted first antibody e.g., mouse serum, culture supernatant, etc.
- Antibodies are allowed to bind to the immobilized antigen.
- biotin an enzyme (horse radish peroxidase; HRP, alkaline phosphatase; ALP, etc.), an anti-immunoglobulin antibody labeled with a chemiluminescent substance, a radioactive compound, or the like is dispensed and bound to the plate.
- the antibody is reacted with the second antibody.
- Tween-PBS After thorough washing with Tween-PBS, a reaction is performed according to the labeled substance of the second antibody to select a monoclonal antibody that specifically reacts with the target antigen.
- the FCM method can measure the binding activity of antibodies to antigen-expressing cells [Cancer Immunol. Immunother., 36, 373 (1993)]. Binding of an antibody to a membrane protein antigen expressed on the cell membrane means that the antibody recognizes and binds to the three-dimensional structure of the naturally occurring antigen.
- the SPR method includes kinetics analysis by Biacore.
- Biacore T100 the kinetics of the binding between the antigen and the test substance is measured, and the results are analyzed with the analysis software attached to the instrument.
- a test substance such as a hybridoma culture supernatant or purified monoclonal antibody is flowed to bind an appropriate amount, and further, the concentration is known. Multiple concentrations of antigen are run and binding and dissociation are measured.
- the obtained data is subjected to kinetics analysis using a 1:1 binding model using the software attached to the device, and various parameters are obtained.
- a 1:1 binding model using the software attached to the device After immobilizing CD116 or CD131 on a sensor chip by, for example, an amine coupling method, multiple concentrations of purified monoclonal antibodies with known concentrations are run to measure binding and dissociation.
- the obtained data is subjected to kinetics analysis by a bivalent binding model using software attached to the device, and various parameters are obtained.
- antibodies that bind to CD116 or CD131 in competition with antibodies against CD116 or CD131 can be selected by allowing the test antibody to coexist in the binding assay system described above to react.
- antibodies that compete with the above-obtained antibody for binding to CD116 or CD131 can be obtained by screening for antibodies that inhibit binding to the antigen when the test antibody is added.
- the epitope recognized and bound by the antibody can be identified as follows.
- antigen partial deletions and mutants can be obtained as secreted proteins using suitable host cells such as E. coli, yeast, plant cells or mammalian cells, or can be obtained on the cell membrane of host cells. It may be expressed and prepared as antigen-expressing cells.
- suitable host cells such as E. coli, yeast, plant cells or mammalian cells, or can be obtained on the cell membrane of host cells. It may be expressed and prepared as antigen-expressing cells.
- Membrane-type antigens are preferably expressed on the membrane of the host cell in order to express the antigen while maintaining its three-dimensional structure.
- Synthetic peptides include methods for producing various partial peptides of the molecule using known peptide synthesis techniques.
- a chimeric protein is prepared by appropriately combining the domains that constitute each region, and the antibody epitope is identified by confirming the reactivity of the antibody to the protein. be able to. Then, more precisely, various oligopeptides corresponding to the corresponding portions or mutants of the peptides are synthesized using oligopeptide synthesis techniques well known to those skilled in the art, and the reactivity of the antibody to the peptides is confirmed to confirm the epitope. can be specified.
- kits for example, SPOTs kit (manufactured by Genesis Biotechnologies), a series of multi-pin peptide synthesis kits (manufactured by Chiron) using multi-pin synthesis method, etc. ] can also be used.
- Antibody fragments that bind to CD116 or CD131, such as Fab can be isolated and obtained by techniques such as the Phage Display method and the Yeast display method, in addition to the method using the hybridoma described above [Emmanuelle Laffy et. ., Human Antibodies 14, 33-55, (2005)].
- An antibody that binds to the same epitope as that bound by an antibody that binds to CD116 or CD131 identifies the epitope of the antibody obtained in the binding assay system described above, a partial synthetic peptide of the epitope, and the three-dimensional structure of the epitope. It can be obtained by preparing a mimetic synthetic peptide or a recombinant of the epitope and immunizing it.
- the epitope is a membrane protein
- a suitable tag such as a FLAG tag, a Histidine tag, a GST protein or an antibody Fc region.
- mRNA is extracted from hybridomas that produce monoclonal antibodies, and cDNA is synthesized.
- the synthesized cDNA is then cloned into a vector such as a phage or plasmid to create a cDNA library.
- Recombinant phages or recombinant plasmids having cDNAs encoding VH or VL are isolated from the library using DNAs encoding the antibody C region portion or V region portion as probes.
- the entire VH or VL nucleotide sequence in the isolated recombinant phage or recombinant plasmid is determined, and the entire VH or VL amino acid sequence is deduced from the nucleotide sequence.
- mice, rats, hamsters, rabbits, etc. are used as non-human animals for hybridoma production, but any animal can be used as long as it is possible to produce hybridomas.
- RNA easy kit manufactured by Qiagen
- oligo(dT) immobilized cellulose column method [Molecular Cloning, A Laboratory Manual, Second Edition, Cold Spring Harbor Laboratory Press (1989)], or Oligo-dT30 ⁇ Super> mRNA Purification Kit (manufactured by Takara Bio Inc.) or the like is used.
- mRNA can also be prepared using a kit such as Fast Track mRNA Isolation Kit (manufactured by Invitrogen) or QuickPrep mRNA Purification Kit (manufactured by Pharmacia).
- Synthesis of cDNA and construction of cDNA libraries can be carried out by known methods [Molecular Cloning, A Laboratory Manual, Second Edition, Cold Spring Harbor Laboratory Press (1989), Current Protocols in Molecular Biology, Supplement 1, John Wiley & Sons (1987 -1997)], or a kit such as Superscript Plasmid System for cDNA Synthesis and Plasmid Cloning (manufactured by Invitrogen) or ZAP-cDNA Synthesis Kit (manufactured by Stratagene).
- Any vector into which the cDNA can be incorporated can be used as a vector into which the cDNA synthesized using the mRNA extracted from the hybridoma as a template when constructing the cDNA library.
- E. coli into which a cDNA library constructed by a phage or plasmid vector can be introduced can be used as long as the cDNA library can be introduced, expressed and maintained.
- XL1-Blue MRF' [Strategies, 5, 81 (1992)], C600 [Genetics, 39, 440 (1954)], Y1088, Y1090 [Science, 222, 778 (1983)], NM522 [J. Mol. Biol., 166, 1 (1983)], K802 [J. Mol. Biol., 16, 118 (1966)], or JM105 [Gene, 38, 275 (1985)].
- primers were prepared and cDNA synthesized from mRNA or a cDNA library was used as a template in the Polymerase Chain Reaction method [hereinafter referred to as the PCR method, Molecular Cloning, A Laboratory Manual, Second Edition, Cold Spring Harbor Laboratory Press (1989 ), Current Protocols in Molecular Biology, Supplement 1, John Wiley & Sons (1987-1997)].
- a plasmid such as pBluescript SK(-) (manufactured by Stratagene), and the nucleotide sequence of the cDNA is determined by a commonly used nucleotide sequence analysis method. do. For example, after performing a reaction such as the dideoxy method [Proc. Natl. Acad. Sci. USA, 74, 5463 (1977)], A. L. F. Analysis is performed using a base sequence automatic analyzer such as a DNA sequencer (manufactured by Pharmacia).
- a base sequence automatic analyzer such as a DNA sequencer (manufactured by Pharmacia).
- amino acid sequence of each CDR of VH and VL can be estimated by comparing with the amino acid sequences of VH and VL of known antibodies [Sequences of Proteins of Immunological Interest, US Dept. Health and Human Services (1991)]. can be done.
- the complete amino acid sequences of the obtained VH and VL for example, BLAST method [J. Mol. Biol., 215, 403 (1990)] using any database such as SWISS-PROT or PIR-Protein It is possible to confirm whether or not the complete amino acid sequences of the VH and VL are novel by performing a homology search with .
- a genetically modified antibody expression vector can be constructed by cloning DNA encoding at least one of human antibody CH and CL into an animal cell expression vector.
- CH and CL of any human antibody can be used, for example, ⁇ 1 subclass CH and ⁇ class CL of a human antibody can be used.
- cDNAs are used as DNAs encoding CH and CL of human antibodies, but chromosomal DNAs consisting of exons and introns can also be used.
- any vector can be used as long as it can incorporate and express a gene encoding the C region of a human antibody.
- pAGE103 J. Biochem., 101, 1307 (1987)]
- pHSG274 [Gene, 27, 223 (1984)]
- pKCR Proc. Natl. Acad. Sci. USA, 78, 1527 (1981)]
- pSG1bd2-4 [Cytotechnol., 4, 173 (1990)]
- pSE1UK1Sed1-3 [Cytotechnol., 13, 79 (1993)]
- INPEP4 manufactured by Biogen-IDEC
- N5KG1val US Pat. No.
- N5KG4PE R409K described in International Publication No. 2006/033386
- N5KG2 vector described in International Publication No. 2003/033538
- transposon vector International Publication No. 2010/143698
- Promoters and enhancers for expression vectors for animal cells include SV40 early promoter [J. )], CMV promoter (U.S. Pat. No. 5,168,062) or immunoglobulin H chain promoter [Cell, 41, 479 (1985)] and enhancer [Cell, 33, 717 (1983)], etc. be able to.
- antibody H chains and L chains For the expression of recombinant antibodies, from the viewpoint of ease of vector construction, ease of introduction into animal cells, balance of expression levels of antibody H chains and L chains in cells, etc., antibody H chains and L chains Although a vector (tandem vector) carrying both antibody chain genes (tandem vector) [J. Immunol. Methods, 167, 271 (1994)] is used, multiple vectors carrying each antibody H chain and L chain gene separately (separate type vectors) can also be used in combination.
- Tandem-type recombinant antibody expression vectors include pKANTEX93 (International Publication No. 97/10354), pEE18 [Hybridoma, 17, 559 (1998)], N5KG1val (US Pat. No. 6,001,358), N5KG4PE R409K (described in International Publication No. 2006/033386), N5KG2 vector (described in International Publication No. 2003/033538), Tol2 transposon vector (International Publication No. 2010/143698), etc. are used.
- a chimeric antibody expression vector can be constructed by cloning each of the VL-encoding cDNAs.
- the base sequence of the linking portion encodes an appropriate amino acid. , and designed to have appropriate restriction enzyme recognition sequences.
- the prepared VH and VL cDNAs are expressed in an appropriate form upstream of each gene encoding CH or CL of the human antibody in the recombinant antibody expression vector obtained in (2). Each is cloned in the same manner to construct a chimeric antibody expression vector.
- the cDNA encoding the non-human antibody VH or VL is amplified by PCR using synthetic DNA having appropriate restriction enzyme recognition sequences at both ends, and the recombinant antibody expression vector obtained in (2).
- a chimeric antibody expression vector can also be constructed by cloning into .
- a cDNA encoding VH or VL of a humanized antibody can be prepared as follows. First, the amino acid sequence of the human antibody VH or VL framework region (hereinafter referred to as FR) to which the non-human antibody VH or VL CDR amino acid sequence obtained in (1) is to be grafted is selected.
- FR human antibody VH or VL framework region
- Any FR amino acid sequence can be used as long as it is derived from a human antibody.
- amino acid sequences of FRs of human antibodies registered in databases such as the Protein Data Bank, or common amino acid sequences of each subgroup of FRs of human antibodies [Sequences of Proteins of Immunological Interest, US Dept. Health and Human Services ( 1991)], etc.
- a human FR amino acid sequence having as high a homology (60% or more) as possible with the VH or VL FR amino acid sequence of the original non-human antibody is selected.
- the amino acid sequences of the CDRs of the original non-human antibody are grafted into the FR amino acid sequences of the selected human antibody VH or VL, respectively, to design the VH or VL amino acid sequences of the humanized antibody, respectively.
- the designed amino acid sequence into a DNA sequence considering the frequency of codon usage [Sequences of Proteins of Immunological Interest, US Dept. Health and Human Services (1991)] found in the base sequence of the antibody gene, human The VH or VL cDNA sequences of the modified antibody are designed, respectively.
- the humanized antibody VH or VL can be easily inserted into the recombinant antibody expression vector obtained in (2).
- the encoding cDNA can be cloned.
- each amplified product is cloned into a plasmid such as pBluescript SK(-) (manufactured by Stratagene), the nucleotide sequence is determined by the same method as described in (1), and the desired humanized antibody is obtained.
- a plasmid is obtained that has a DNA sequence that encodes the VH or VL amino acid sequence.
- a humanized antibody retains its antigen-binding activity only by grafting only the VH and VL CDRs of a non-human antibody to the VH and VL FRs of a human antibody. of non-human antibodies [BIO/TECHNOLOGY, 9, 266 (1991)]. Therefore, among the amino acid sequences of the VH and VL FRs of the human antibody, the amino acid residues involved in direct binding to the antigen, the amino acid residues interacting with the CDR amino acid residues, and the three-dimensional structure of the antibody are maintained. By identifying amino acid residues that are indirectly involved in binding to an antigen and substituting those amino acid residues with the amino acid residues of the original non-human antibody, the reduced antigen-binding activity of the humanized antibody can be raised.
- X-ray crystallography [J. Mol. Biol., 112, 535 (1977)] or computer modeling [Protein Engineering, 7, 1501 (1994)], etc. to identify amino acid residues of FR involved in antigen-binding activity can be used to construct and analyze the three-dimensional structure of an antibody.
- X-ray crystallography [J. Mol. Biol., 112, 535 (1977)] or computer modeling [Protein Engineering, 7, 1501 (1994)], etc. to identify amino acid residues of FR involved in antigen-binding activity
- a modified humanized antibody having the necessary antigen-binding activity can be obtained. .
- the FR amino acid residues of the VH and VL of the human antibody can be modified by performing the PCR reaction described in (4) using the synthetic DNA for modification.
- the base sequence of the amplified product after PCR reaction is determined by the method described in (1) to confirm that the intended modification has been carried out.
- a suitable restriction enzyme recognition sequence is introduced into the 5' ends of the synthetic DNAs located at both ends. By doing so, they are cloned upstream of each gene encoding CH or CL of the human antibody in the recombinant antibody expression vector obtained in (2) so that they are expressed in an appropriate form.
- Any host cell that can express a recombinant antibody can be used as the host cell into which the expression vector is introduced.
- COS-7 cells [American Type Culture Collection (ATCC) number: CRL1651] can be used. use.
- ATCC American Type Culture Collection
- CRL1651 the DEAE-dextran method
- lipofection method Proc. Natl. Acad. Sci. USA, 84, 7413 ( 1987)].
- the expression level and antigen-binding activity of the recombinant antibody in the culture supernatant was measured by an enzyme-linked immunosorbent method [Monoclonal Antibodies-Principles and Practice, Third Edition, Academic Press (1996), Antibodies-A Laboratory Manual , Cold Spring Harbor Laboratory (1988), Monoclonal Antibody Experiment Manual, Kodansha Scientific (1987)] and the like.
- Introduction of expression vectors into host cells includes, for example, electroporation [Japanese Patent Laid-Open No. 2-257891, Cytotechnology, 3, 133 (1990)], calcium ion method, electroporation method, spheroplast method, lithium acetate method, calcium phosphate method, lipofection method, and the like.
- electroporation Japanese Patent Laid-Open No. 2-257891, Cytotechnology, 3, 133 (1990)
- calcium ion method calcium ion method
- electroporation method electroporation method
- spheroplast method lithium acetate method
- calcium phosphate method calcium phosphate method
- lipofection method and the like.
- methods for introducing genes into animals which will be described later, include microinjection, methods for introducing genes into ES cells using electroporation or lipofection, and nuclear transplantation.
- Any cell can be used as the host cell into which the recombinant antibody expression vector is introduced, as long as it is a host cell that can express the recombinant antibody.
- mouse SP2/0-Ag14 cells ATCC CRL1581
- mouse P3X63-Ag8.653 cells ATCC CRL1580
- Chinese hamster CHO-K1 cells ATCC CCL-61
- DUKXB11 ATCC CCL-9096
- Pro-5 cells ATCC CCL-1781
- CHO-S cells Life Technologies, Cat No. 11619
- CHO cells deficient in the dihydrofolate reductase gene (dhfr) CHO/DG44 cells
- proteins such as enzymes involved in the synthesis of the intracellular sugar nucleotide GDP-fucose, sugar chain modifications in which the 1-position of fucose is ⁇ -bonded to the 6-position of N-acetylglucosamine at the reducing end of N-glycoside-linked complex-type sugar chains.
- a host cell with reduced or deleted activity such as a protein involved in the transport of the intracellular sugar nucleotide GDP-fucose to the Golgi apparatus, e.g. CHO cells (International Publication No. 2005/035586, International Publication No. 02/31140) and the like can also be used.
- a transformant that stably expresses the recombinant antibody is selected by culturing in an animal cell culture medium containing a drug such as G418 sulfate (hereinafter referred to as G418) ( Japanese Patent Laid-Open No. 2-257891).
- Animal cell culture medium includes RPMI1640 medium (manufactured by Invitrogen), GIT medium (manufactured by Nihon Pharmaceutical Co., Ltd.), EX-CELL301 medium (manufactured by JRH), EX-CELL302 medium (manufactured by JRH), EX -CELL325 medium (manufactured by JRH), IMDM medium (manufactured by Invitrogen), or Hybridoma-SFM medium (manufactured by Invitrogen), or a medium obtained by adding various additives such as FBS to these medium is used.
- RPMI1640 medium manufactured by Invitrogen
- GIT medium manufactured by Nihon Pharmaceutical Co., Ltd.
- EX-CELL301 medium manufactured by JRH
- EX-CELL302 medium manufactured by JRH
- EX -CELL325 medium manufactured by JRH
- IMDM medium manufactured by Invitrogen
- Hybridoma-SFM medium
- the expression level and antigen-binding activity of the genetically modified antibody in the culture supernatant can be measured by ELISA or the like.
- the DHFR amplification system Japanese Patent Laid-Open No. 2-257891 or the like can be used to increase the expression level of the recombinant antibody produced by the transformant.
- Recombinant antibodies can be purified from the culture supernatant of transformants using a protein A column [Monoclonal Antibodies - Principles and practice, Third edition, Academic Press (1996), Antibodies - A Laboratory Manual, Cold Spring Harbor Laboratory (1988)]. Purification can also be carried out by combining methods used in protein purification, such as gel filtration, ion exchange chromatography, and ultrafiltration.
- a method for purifying a composition containing an antibody comprising purifying an antibody containing an Fc region by protein A column chromatography, wherein said antibody has the H435F mutation in said Fc region is an antibody into which has been introduced.
- Antibodies in which the H435F mutation has been introduced in the Fc region have excellent binding properties to protein A columns, and can be purified by protein A column chromatography to achieve high purification efficiency.
- the molecular weight of the purified recombinant antibody H chain, L chain or the entire antibody molecule can be determined by polyacrylamide gel electrophoresis [Nature, 227, 680 (1970)] or Western blotting [Monoclonal Antibodies - Principles and practice, Third edition, Academic Press (1996), Antibodies - A Laboratory Manual, Cold Spring Harbor Laboratory (1988)].
- bispecific antibody of the present invention can be prepared, for example, by preparing a first antigen-binding domain that binds to CD131 and a second antigen-binding domain that binds to CD116, and linking them. .
- first antigen-binding domain that binds to CD116
- first antigen-binding domain is an antibody or an antibody fragment
- DNA sequences encoding the amino acid sequences of the CDRs or variable regions of the antibody are determined by the methods described in .
- an antigen binding domain comprising said CDRs or variable regions is designed, and a DNA sequence encoding the amino acid sequence of said antigen binding domain is designed.
- the first antigen-binding domain is Fab
- the CDR DNA sequence of the antibody is determined by the method described in .
- a DNA sequence encoding a polypeptide chain linking the determined VH sequence containing the CDRs of the heavy chain and the CH1 sequence, and a polypeptide chain linking the determined VL sequence containing the CDRs of the light chain and the CL sequence are encoded.
- Design a DNA sequence. Their DNA sequences are, for example, 2. It can be prepared by incorporating into the recombinant antibody expression vector described in (2) and expressing the antigen-binding domain.
- the first antigen-binding domain is a polypeptide containing a CD116-binding portion of a protein having binding ability to GM-CSF or CD116, designing a DNA sequence encoding the polypeptide, for example, 2. It can be prepared by incorporating into the recombinant antibody expression vector described in (2) and expressing the antigen-binding domain.
- the antigen-binding activity of the prepared antigen-binding domains can be evaluated by the method described above, and those that retain the antigen-binding activity can be selected.
- the antigen-binding domain that binds to CD131 is prepared according to 3-1. It can be produced by the same method as.
- the bispecific antibody of the present invention can also be produced by the above-described method when the first and second antigen-binding domains are linked with an appropriate amino acid sequence to express a recombinant protein.
- amino acid residues contained in each antigen-binding domain can be used to chemically link via any linker.
- Amino acid residues used for linkage may be natural amino acid residues or non-natural amino acid residues. Examples of natural amino acid residues that can be used include cysteine, tyrosine, serine, threonine, lysine, glutamic acid, and aspartic acid.
- non-natural amino acid residues include, for example, Z-lysine derivatives (N6-((benzyloxy)carbonyl)-L-lysine derivatives) disclosed in WO 2017/030156, TCO*-Lys (N6-( ((trans-cyclooct-2-en-1-yl)oxy)carbonyl)-L-lysine) or BCN-Lys (N6-((bicyclo[6.1.0]non-4-yn-9-ylmethoxy) carbonyl)-L-lysine) can be used.
- Z-lysine derivatives N6-((benzyloxy)carbonyl)-L-lysine derivatives
- TCO*-Lys N6-( ((trans-cyclooct-2-en-1-yl)oxy)carbonyl)-L-lysine)
- BCN-Lys N6-((bicyclo[6.1.0]non-4-yn-9-ylmethoxy)
- a chemical reaction via non-natural amino acid residues is used because it can selectively react with the linker without affecting other amino acids contained in the antigen-binding domains. It is preferred to use ligation.
- the method used to link the antigen-binding domains is not particularly limited, and any method for chemically linking the desired amino acid residue and the linker can be used. Examples thereof include chemical ligation using a chemical reaction [Introduction to Antibody Engineering, Chijinshokan (1994), Kolb et al., Angew Chem Int Ed Engl. 40. 2004-21, 2001].
- the linker used for chemically linking the antigen-binding domain is not particularly limited as long as it has a functional group necessary for reacting with the amino acid residues contained in the antigen-binding domain.
- the antigen-binding domains can be connected by using a linker having two alkynyl groups in one molecule.
- the antigen-binding domain prepared in is Fab
- a part or all of the hinge region of the antibody is added to the C-terminal side of each antigen-binding domain, and the S—S bond forms a binder having a structure of (Fab′) 2.
- Specific antibodies can also be produced. By adding Fc thereto, an IgG antibody-type bispecific antibody can be produced.
- the binding activity of the bispecific antibody of the present invention to cell lines expressing at least one of CD116 and CD131 is determined by the above-mentioned 1. It can be measured using the binding assay system described in (7).
- CDC activity or ADCC activity against cells expressing at least one of CD116 and CD131 can be measured by a known measurement method [Cancer Immunol. Immunother., 36, 373 (1993)].
- the agonistic activity of the bispecific antibody of the present invention to the GM-CSF receptor can be measured by the following method. For example, TF-1 cells that proliferate in a GM-CSF-dependent manner are seeded in a 96-well plate, GM-CSF or the bispecific antibody of the present invention is added, and cultured for a certain period of time. By measuring, the proliferation rate of the cells is determined.
- the bispecific antibody or the bispecific antibody fragment addition group that there is agonist activity when the cell proliferation rate is 30% or higher.
- the agonist activity of the bispecific antibody or the bispecific antibody fragment is preferably 40% or more, more preferably 50% or more, still more preferably 60% or more, still more preferably 70%, when GM-CSF is 100%. % or more.
- the agonistic activity of the bispecific antibody of the present invention for the GM-CSF receptor can also be evaluated by the differentiation-inducing activity from monocytes to macrophages. Differentiation-inducing activity can be measured by the following method. For example, monocytes are seeded in a 96-well plate, a bispecific antibody is added, cultured for a certain period of time, and then changes in the expression levels of CD14 and CD206 are analyzed by flow cytometry.
- Signal transduction from CD116 and CD131 into cells can be evaluated by detecting phosphorylation of intracellular proteins by Western blotting or the like.
- the bispecific antibody or antibody fragment of the present invention is used to treat diseases associated with GM-CSF or neutralizing antibodies to GM-CSF.
- diseases associated with GM-CSF or neutralizing antibodies to GM-CSF can be used for example, melanoma, head and neck cancer, breast cancer, gastrointestinal cancer, pancreatic cancer, hepatocellular carcinoma, prostate cancer, colorectal cancer, lung cancer, renal cell carcinoma, ovarian cancer, chemotherapy-induced leukopenia, Leukopenia due to bone marrow transplantation, leukopenia due to aplastic anemia, leukopenia due to myelodysplastic syndrome, recovery of bone marrow function after bone marrow transplantation, acute myelogenous leukemia, chronic myelomonocytic leukemia, sepsis, mycosis, HIV Infectious diseases, influenza virus infections, non-tuberculous mycobacterial infections, acute respiratory distress syndrome, alveolar proteinosis, Crohn'
- a therapeutic agent containing the bispecific antibody or the bispecific antibody fragment of the present invention, or a derivative thereof may contain only the antibody, the antibody fragment, or a derivative thereof as an active ingredient, They are usually mixed with one or more pharmacologically acceptable carriers and provided as a pharmaceutical formulation prepared by a method known in the technical field of pharmaceutical science.
- the route of administration includes, for example, oral administration, or parenteral administration such as intraoral administration, intratracheal administration, intrarectal administration, subcutaneous administration, intramuscular administration, and intravenous administration.
- Dosage forms include, for example, sprays, capsules, tablets, powders, granules, syrups, emulsions, suppositories, injections, ointments, and tapes.
- Various formulations contain commonly used excipients, extenders, binders, wetting agents, disintegrants, surfactants, lubricants, dispersants, buffers, preservatives, solubilizers, preservatives, coloring agents. It can be manufactured by a conventional method using ingredients, flavoring agents, stabilizers, and the like.
- Excipients include, for example, lactose, fructose, glucose, cornstarch, sorbitol, crystalline cellulose, sterilized water, ethanol, glycerol, physiological saline and buffer solutions.
- Disintegrants include, for example, starch, sodium alginate, gelatin, calcium carbonate, calcium citrate, dextrin, magnesium carbonate and synthetic magnesium silicate.
- Binders include, for example, methylcellulose or its salts, ethylcellulose, gum arabic, gelatin, hydroxypropylcellulose and polyvinylpyrrolidone.
- Lubricants include, for example, talc, magnesium stearate, polyethylene glycol and hydrogenated vegetable oils.
- stabilizers include amino acids such as arginine, histidine, lysine, and methionine, human serum albumin, gelatin, dextran 40, methylcellulose, sodium sulfite, and sodium metasulfite.
- additives include, for example, syrup, petrolatum, glycerin, ethanol, propylene glycol, citric acid, sodium chloride, sodium nitrite and sodium phosphate.
- Formulations suitable for oral administration include, for example, emulsions, syrups, capsules, tablets, powders or granules.
- Liquid preparations such as emulsions or syrups may contain water, sugars such as sucrose, sorbitol or fructose, glycols such as polyethylene glycol or propylene glycol, oils such as sesame oil, olive oil or soybean oil, p-hydroxybenzoic acid. It is manufactured using preservatives such as esters, or flavors such as strawberry flavor or peppermint as additives.
- Capsules, tablets, powders, granules, etc. contain excipients such as lactose, glucose, sucrose or mannitol, disintegrants such as starch or sodium alginate, lubricants such as magnesium stearate or talc, polyvinyl alcohol, hydroxy It is manufactured using a binder such as propylcellulose or gelatin, a surfactant such as fatty acid ester, or a plasticizer such as glycerin as an additive.
- excipients such as lactose, glucose, sucrose or mannitol, disintegrants such as starch or sodium alginate, lubricants such as magnesium stearate or talc, polyvinyl alcohol, hydroxy It is manufactured using a binder such as propylcellulose or gelatin, a surfactant such as fatty acid ester, or a plasticizer such as glycerin as an additive.
- Formulations suitable for parenteral administration include, for example, injections, suppositories and sprays. Injections are prepared using a carrier consisting of a salt solution, a glucose solution, or a mixture of both.
- Suppositories are prepared using carriers such as cocoa butter, hydrogenated fats or carboxylic acids. Aerosols are manufactured using a carrier that does not irritate the recipient's oral cavity and respiratory tract mucosa, disperses the monoclonal antibody or antibody fragment thereof of the present invention as fine particles, and facilitates absorption. Carriers include, for example, lactose, glycerin, and the like. It can also be manufactured as an aerosol or dry powder. Furthermore, in the parenteral preparations described above, the ingredients exemplified as additives in formulations suitable for oral administration can also be added.
- the effective amount administered as a combination of an effective amount of the bispecific antibody of the present invention with a suitable diluent and a pharmacologically acceptable carrier is 0.0001 mg to 100 mg per kg of body weight per administration for 2 days. to 8 weeks apart.
- a method for diagnosing a disease using the bispecific antibody or the bispecific antibody fragment of the present invention Detecting or measuring cells expressing at least one of CD116 and CD131 using the bispecific antibody or the bispecific antibody fragment of the present invention
- a disease associated with GM-CSF or a disease associated with a neutralizing antibody to GM-CSF can be diagnosed.
- GM-CSF Diseases involving GM-CSF can be diagnosed, for example, by detecting or measuring at least one of CD116 and CD131 as follows.
- the abundance of at least one of CD116 and CD131 in the subject's biological sample is similarly examined, and the abundance is compared with the abundance of healthy subjects.
- a disease involving GM-CSF can be diagnosed when the abundance of at least one of CD116 and CD131 in a subject is increased or decreased compared to healthy subjects.
- An immunological method is a method of detecting or measuring the amount of antibody or antigen using a labeled antigen or antibody.
- Examples thereof include radiolabeled immunoassay, enzyme immunoassay, fluorescence immunoassay, luminescence immunoassay, Western blotting, physicochemical techniques and the like.
- radiolabeled immuno-antibody method for example, an antigen or a cell expressing the antigen is reacted with the bispecific antibody or antibody fragment of the present invention, and then reacted with a radiolabeled anti-immunoglobulin antibody or binding fragment.
- a method of measuring with a scintillation counter or the like can be mentioned.
- an antigen or a cell expressing the antigen is reacted with the bispecific antibody or the bispecific antibody fragment of the present invention, and further reacted with a labeled anti-immunoglobulin antibody or binding fragment. After that, the color-developing dye is measured with an absorptiometer.
- sandwich ELISA method and the like can be mentioned.
- a known enzyme label [enzyme immunoassay, Igakushoin (1987)] can be used as the label used in the enzyme immunoassay.
- enzyme immunoassay Igakushoin (1987)
- alkaline phosphatase label, peroxidase label, luciferase label, biotin label, or the like is used.
- the sandwich ELISA method is a method in which an antibody is bound to a solid phase, an antigen to be detected or measured is trapped, and a second antibody is reacted with the trapped antigen.
- a fluorescent substance such as FITC
- an enzyme such as peroxidase, or biotin.
- the above antibody-adsorbed plate was reacted with cells isolated from the living body or their lysate, tissue or its lysate, cell culture supernatant, serum, pleural effusion, ascitic fluid, eye fluid, etc., and then labeled. An antibody or antibody fragment is reacted, and a detection reaction is performed according to the labeling substance.
- the antigen concentration in the test sample is calculated from a standard curve prepared by serially diluting antigens of known concentrations.
- Antibodies used in sandwich ELISA may be either polyclonal antibodies or monoclonal antibodies, and antibody fragments such as Fab, Fab', or F(ab') 2 may be used.
- the combination of two types of antibodies used in the sandwich ELISA method may be a combination of monoclonal antibodies or antibody fragments that bind to different epitopes, or a combination of a polyclonal antibody and a monoclonal antibody or antibody fragment thereof.
- fluorescence immunoassay method for example, it is measured by the method described in the literature [Monoclonal Antibodies-Principles and practice, Third edition, Academic Press (1996), Monoclonal Antibody Experiment Manual, Kodansha Scientific (1987)], etc. .
- a known fluorescent label [fluorescent antibody method, Soft Science (1983)] can be used as the label used in the fluorescence immunoassay method. For example, FITC or RITC is used.
- luminescence immunoassay method for example, the method described in the literature [Bioluminescence and Chemiluminescence Clinical Test 42, Hirokawa Shoten (1998)] is used. Labels used in luminescence immunoassays include known luminescent labels such as acridinium esters and lophine.
- antigens or cells expressing antigens are fractionated by SDS (sodium dodecyl sulfate)-PAGE [Antibodies-A Laboratory Manual Cold Spring Harbor Laboratory (1988)], and then the gel is treated with polyvinylidene fluoride ( PVDF) membrane or nitrocellulose membrane, reacted with an antibody or antibody fragment that binds to the antigen on the membrane, and further labeled with a fluorescent substance such as FITC, an enzyme label such as peroxidase, or an anti-IgG antibody or biotin label. After reacting with the antibody fragment, the label is measured by visualization. An example is shown below.
- cells or tissues expressing a polypeptide having a desired amino acid sequence are lysed, and 0.1 to 30 ⁇ g of protein per lane is electrophoresed by SDS-PAGE under reducing conditions.
- the electrophoresed protein is transferred to a PVDF membrane and reacted with PBS containing 1 to 10% BSA (hereinafter referred to as BSA-PBS) at room temperature for 30 minutes for blocking operation.
- BSA-PBS PBS containing 1 to 10% BSA
- the bispecific antibody of the present invention is reacted, washed with PBS containing 0.05 to 0.1% Tween-20 (Tween-PBS), and reacted with peroxidase-labeled goat anti-mouse IgG at room temperature for 2 hours. .
- the antigen is detected by detecting the antibody-bound band using ECL Western Blotting Detection Reagents (manufactured by Amersham) or the like.
- ECL Western Blotting Detection Reagents manufactured by Amersham
- An antibody that can bind to a polypeptide that does not retain its native three-dimensional structure is used as the antibody used for detection in Western blotting.
- a physicochemical method for example, by binding at least one of the antigens CD116 and CD131 to the bispecific antibody or the bispecific antibody fragment of the present invention, aggregates are formed and the aggregates are detected. do.
- a capillary tube method for example, a capillary tube method, a one-dimensional immunodiffusion method, an immunoturbidimetric method, or a latex immunoturbidimetric method [Clinical Test Method Report, Kanehara Shuppan (1998)] can be used.
- a carrier such as polystyrene latex having a particle size of about 0.1 to 1 ⁇ m sensitized with an antibody or an antigen is used, and an antigen-antibody reaction is caused by the corresponding antigen or antibody. Scattered light increases and transmitted light decreases. By detecting this change as absorbance or integrating sphere turbidity, the antigen concentration and the like in the test sample are measured.
- known immunological detection methods can be used, preferably immunoprecipitation, immunocytostaining, immunohistochemical staining.
- a fluorescent antibody staining method or the like is used.
- cells expressing at least one of CD116 and CD131 are reacted with the bispecific antibody of the present invention or an antibody fragment thereof, and then a carrier having specific binding ability to immunoglobulins such as protein G sepharose is used. is added to precipitate the antigen-antibody complex.
- a carrier having specific binding ability to immunoglobulins such as protein G sepharose is used. is added to precipitate the antigen-antibody complex.
- the bispecific antibody or the bispecific antibody fragment of the present invention is immobilized on a 96-well plate for ELISA, and then blocked with BSA-PBS.
- BSA-PBS is discarded, and after thorough washing with PBS, a lysate of cells or tissues expressing at least one of CD116 and CD131 is reacted.
- Immunoprecipitates are extracted from the well-washed plate with a sample buffer for SDS-PAGE and detected by Western blotting as described above.
- Immune cell staining method or immunohistochemical staining method is a method in which cells or tissues expressing an antigen are treated with a surfactant, methanol, or the like in some cases to improve antibody permeability, and then subjected to the bispecific staining method of the present invention. After reacting with an antibody and further reacting with an anti-immunoglobulin antibody or a binding fragment thereof labeled with a fluorescent label such as FITC, an enzyme label such as peroxidase, or a biotin label, the label is visualized and microscopically observed. The method.
- the bispecific antibody or bispecific antibody fragment of the present invention can detect at least one of CD116 and CD131 expressed on the cell membrane by fluorescent antibody staining.
- the formed antibody-antigen complex and the free antibody-antigen complex not involved in the formation of the antibody-antigen complex can be measured without separating the antibody or antigen.
- Example 1 Production of CD131 and CD116 antigen expression vectors and soluble antigens (1) Production of human, monkey, and mouse CD131 expression vectors Base sequence of human CD131 gene (Genbank Accession Number: M59941), base sequence of monkey CD131 gene (Genbank Accession Number: XP_015312724_1) and the nucleotide sequence of the mouse CD131 gene (Genbank Accession Number: M34397), obtain the full-length amino acid sequence of human, monkey, and mouse CD131, and convert it to the optimal codon for expression in mammalian cells. was performed to obtain nucleotide sequences encoding human, monkey, and mouse full-length CD131.
- DNA having the full-length base sequences of human and monkey CD131 (SEQ ID NO: 1, SEQ ID NO: 2) was totally synthesized, and Infusion-HD Cloning Kit (manufactured by Clontech) was added to pEF6-myc-His vector (manufactured by Thermo Fisher). to obtain human and monkey CD131 full-length expression vectors.
- DNAs (SEQ ID NO: 3, SEQ ID NO: 4, SEQ ID NO: 5) having nucleotide sequences of human, monkey, and mouse CD131 extracellular regions, and DNAs having nucleotide sequences to which a signal sequence and a human Fc sequence or His tag sequence were added. It was totally synthesized and inserted into a pCI vector (manufactured by Promega) using Infusion-HD Cloning Kit (manufactured by Clontech) to obtain human, monkey and mouse CD131 soluble antigen expression vectors.
- pCI vector manufactured by Promega
- Infusion-HD Cloning Kit manufactured by Clontech
- Human and monkey CD116 full-length base sequences (SEQ ID NO: 6, SEQ ID NO: 7) were totally synthesized, inserted into pCI vector (manufactured by Promega) using Infusion-HD Cloning Kit (manufactured by Clontech), and human and monkey A CD116 full-length expression vector was obtained.
- a DNA having the nucleotide sequence of human, monkey, and mouse CD116 extracellular region (SEQ ID NO: 8, SEQ ID NO: 9, SEQ ID NO: 10) and a DNA having a nucleotide sequence to which a signal sequence and a human Fc sequence or His tag sequence are added. It was totally synthesized and inserted into a pCI vector (manufactured by Promega) using Infusion-HD Cloning Kit (manufactured by Clontech) to obtain human, monkey and mouse CD116 soluble antigen expression vectors.
- the culture supernatant was affinity purified using Protein A resin (MabSelect, manufactured by GE Healthcare) or cOmplete His-Tag Purification Resin (manufactured by Roche).
- Purification of human Fc fusion using Protein A resin involves adsorbing protein in the culture supernatant to Protein A, washing with D-PBS (-), 20 mM sodium citrate, 50 mM NaCl buffer (pH 3 .4) and collected in a tube containing 1M sodium phosphate buffer (pH 7.0).
- the concentration of the obtained protein was calculated by measuring the absorbance at a wavelength of 280 nm and using the extinction coefficient estimated from the amino acid sequence of each protein.
- Example 2 Preparation of anti-human CD131 monoclonal antibody and anti-human CD116 monoclonal antibody (1) Immunization of animals and preparation of antibody-producing cells Human antibody-producing mice [Ishida & Lonberg, IBC's 11th Antibody Engineering, Abstract 2000; , I. et al., Cloning & Stem Cells 4, 91-102 (2002), and Isao Ishida (2002) Experimental medicine 20, 6, 846-851], human CD131-Fc (R&D Systems Inc.
- Example 2 human CD131 soluble antigen (human Fc fusion) and human CD116 soluble antigen (human Fc fusion) prepared in Example 1 were administered at 20 ⁇ g/mouse or 50 ⁇ g/mouse for a total of 4 to 6 times. Only at the first immunization, Alum gel (0.25 mg/mouse or 2 mg/mouse) and inactivated Bordetella pertussis suspension (manufactured by Nacalai Tesque) (1 ⁇ 10 9 cells/mouse) were added as adjuvants.
- Alum gel (0.25 mg/mouse or 2 mg/mouse
- Bordetella pertussis suspension manufactured by Nacalai Tesque
- the second immunization was performed two weeks after the first immunization, the third immunization was performed one week after that, and the final immunization was performed two weeks after the third immunization. Some individuals were given two booster immunizations at 2-week intervals from the third immunization, and then the final immunization two weeks later.
- Four days after the final immunization the animals were dissected and lymph nodes or spleens were surgically removed. After the excised lymph node or spleen was homogenized, the cells were transferred to a tube through a cell strainer (manufactured by Falcon) and centrifuged to precipitate the cells.
- the obtained spleen cells were mixed with an erythrocyte removal reagent (manufactured by Sigma-Aldrich), reacted in a water bath at 37°C for 1 minute, diluted with MEM medium (manufactured by Sigma-Aldrich), and further centrifuged. separated.
- the obtained splenocytes or lymphocytes were washed twice with MEM medium and then subjected to hybridoma production or antibody library production.
- mice splenocytes or lymphocytes obtained in (1) and myeloma cells were mixed at a ratio of 2:1 and centrifuged (1500 rpm, 5 minutes). After loosening the obtained precipitated fraction (cell group), cell fusion was performed using GenomONE-CF (manufactured by Ishihara Sangyo Co., Ltd.). After reacting on ice for 5 minutes, it was incubated at 37° C. for 15 minutes.
- HAT medium a medium obtained by adding 10% FBS (manufactured by Access Biologicals), HAT supplement (manufactured by Thermo Fisher), and gentamicin (20 ⁇ g/mL) to cloning medium CM-B (manufactured by Sekisui Medical Co., Ltd.) (hereinafter referred to as HAT medium).
- HAT medium a medium obtained by adding 10% FBS (manufactured by Access Biologicals), HAT supplement (manufactured by Thermo Fisher), and gentamicin (20 ⁇ g/mL) to cloning medium CM-B (manufactured by Sekisui Medical Co., Ltd.)
- HAT medium a medium obtained by adding 10% FBS (manufactured by Access Biologicals), HAT supplement (manufactured by Thermo Fisher), and gentamicin (20 ⁇ g/mL)
- HAT medium a medium obtained by adding 10% FBS (manufact
- Various antigen proteins were prepared to 5 ⁇ g/mL with D-PBS(-) (manufactured by Nacalai Tesque) and applied to 96-well or 384-well ELISA plates (MAXISORP NUNC-IMMNO PLATE, Thermo Fisher Scientific). Dispensed at 50 ⁇ L/well or 25 ⁇ L/well, allowed to stand overnight at 4° C. for adsorption, washed 2-3 times with PBS, and added 100 ⁇ L/well of 1% BSA-PBS (manufactured by Nacalai Tesque). It was dispensed into wells or 50 ⁇ L/well and allowed to stand at room temperature for 1 hour for blocking.
- the hybridoma supernatant was dispensed at 50 ⁇ L/well or 25 ⁇ L/well and allowed to stand at room temperature for 1 hour. After washing this plate three times with PBST, 50 ⁇ L/well of Peroxidase-labeled Goat Anti-Human IgG, Fc ⁇ fragment specific antibody (manufactured by Jackson ImmunoResearch, Cat# 109-035-008) diluted with 1% BSA-PBS or 25 ⁇ L/well was dispensed and allowed to stand at room temperature for 1 hour.
- This plate was washed three times with PBST, and then treated with ABTS (2,2'-Azino-bis (3-ethylbenzothiazoline-6-sulfonic Acid, manufactured by Wako, Cat # 016-08521) substrate solution or TMB substrate solution (Thermo Fisher). ) was added at 50 ⁇ L/well or 25 ⁇ L/well to develop color, and when appropriate color development was obtained, an equal volume of 1% SDS solution or 0.5 mol/L sulfuric acid was added to stop color development.
- ABTS 2,2'-Azino-bis (3-ethylbenzothiazoline-6-sulfonic Acid, manufactured by Wako, Cat # 016-08521) substrate solution or TMB substrate solution (Thermo Fisher).
- the absorbance (415 nm-490 nm) at a sample wavelength of 415 nm and a reference wavelength of 490 nm or the absorbance (450 nm-570 nm) at a sample wavelength of 450 nm and a reference wavelength of 570 nm was measured using a plate reader (Spectra Max, manufactured by Molecular Devices, or Spark 10M, manufactured by TECAN). was measured using
- Expi293 (trademark) Expression System (manufactured by Thermo Fisher) using cells transiently transfected with the human and monkey CD131 full-length expression vectors prepared in Example 1-(1) and non-transfected cells. .
- Each cell was suspended in 1% BSA-PBS (manufactured by Nacalai Tesque), dispensed into a 96-well plate at 1-2 ⁇ 10 5 cells/well, incubated on ice for 30 minutes, and then centrifuged ( 2000 rpm for 2 minutes). After removing the supernatant, the hybridoma supernatant was dispensed at 20-50 ⁇ L/well and allowed to react on ice for 30 minutes.
- BSA-PBS manufactured by Nacalai Tesque
- Anti-human CD116 antibody-producing hybridomas were screened by ELISA and FCM. Screening by ELISA was carried out by applying the human CD116 soluble antigen (His-tagged) and monkey CD116 soluble antigen prepared in Example 1-(3) to a plate on which Tetra His Antibody (manufactured by Qiagen, Cat#34670) was immobilized. (His-tagged), and an indirect solid-phase antigen ELISA system in which mouse CD116 soluble antigen (His-tagged) was captured.
- Tetra His Antibody was prepared to 5 ⁇ g/mL with D-PBS(-) (manufactured by Nacalai Tesque) and applied to a 96-well or 384-well ELISA plate (MAXISORP NUNC-IMMNO PLATE, ThermoFisher Scientific). Dispensed at 50 ⁇ L/well or 25 ⁇ L/well, allowed to stand overnight at 4° C. for adsorption, washed 2-3 times with PBS, and added 100 ⁇ L/well of 1% BSA-PBS (manufactured by Nacalai Tesque). It was dispensed into wells or 50 ⁇ L/well and allowed to stand at room temperature for 1 hour for blocking.
- human CD116 soluble antigen (His-tagged), monkey CD116 soluble antigen (His-tagged), and mouse CD116 soluble antigen (His-tagged) prepared in Example 1-(3) were added to 5 ⁇ g/mL with 1% BSA. - 50 ⁇ L/well or 25 ⁇ L/well of the PBS-diluted solution was dispensed and allowed to stand at room temperature for 1 hour. After washing this plate with PBST three times, hybridoma supernatant diluted with 1% BSA-PBS was dispensed at 50 ⁇ L/well or 25 ⁇ L/well and allowed to stand at room temperature for 1 hour.
- Peroxidase-labeled Goat Anti-Human IgG, Fc antibody (manufactured by IBL, Cat#17507) diluted with 1% BSA-PBS was dispensed at 50 ⁇ L/well or 25 ⁇ L/well. , at room temperature for 1 hour.
- This plate was washed three times with PBST, and then treated with ABTS (2,2'-Azino-bis (3-ethylbenzothiazoline-6-sulfonic Acid, manufactured by Wako, Cat # 016-08521) substrate solution or TMB substrate solution (Thermo Fisher). ) was added at 50 ⁇ L/well or 25 ⁇ L/well to develop color, and when appropriate color development was obtained, an equal volume of 1% SDS solution or 0.5 mol/L sulfuric acid was added to stop color development.
- ABTS 2,2'-Azino-bis (3-ethylbenzothiazoline-6-sulfonic Acid, manufactured by Wako, Cat # 016-08521) substrate solution or TMB substrate solution (Thermo Fisher).
- the absorbance (415 nm-490 nm) at a sample wavelength of 415 nm and a reference wavelength of 490 nm or the absorbance (450 nm-570 nm) at a sample wavelength of 450 nm and a reference wavelength of 570 nm was measured using a plate reader (Spectra Max, manufactured by Molecular Devices, or Spark 10M, manufactured by TECAN). was measured using
- Expi293 (trademark) Expression System (manufactured by Thermo Fisher) using cells transiently transfected with the human and monkey CD116 full-length expression vectors prepared in Example 1-(2) and non-transfected cells. .
- Each cell was suspended in 1% BSA-PBS (manufactured by Nacalai Tesque), dispensed into a 96-well plate at 1-2 ⁇ 10 5 cells/well, incubated on ice for 30 minutes, and then centrifuged ( 2000 rpm for 2 minutes).
- the hybridoma supernatant was dispensed at 20-50 ⁇ L/well and allowed to react on ice for 30 minutes. After centrifugation and washing with 1% BSA-PBS 1-2 times, APC-labeled F(ab') 2 Fragment Goat Anti-Human IgG, Fc ⁇ fragment specific antibody (Jackson ImmunoResearch) diluted with 1% BSA-PBS (manufacturer, Cat#109-136-098) was dispensed at 50 ⁇ L/well and allowed to react for 30 minutes on ice in the dark.
- Hybridomas in positive wells selected by hybridoma screening were seeded on a 96-well plate in which HAT medium was dispensed using a cell sorter (manufactured by SONY, SH800), and single clones were obtained. changed.
- Cultivation is performed under conditions of 37° C. and 5% CO 2 until the number of cells in the well reaches a cell number suitable for screening, and the obtained monoclonal hybridoma culture supernatant is used to perform (2) or (3) Screening was performed again by the method described in 1. to establish anti-CD131 monoclonal antibody-producing hybridomas and anti-CD116 monoclonal antibody-producing hybridomas.
- RNA was prepared from the obtained hybridoma using MagNA Pure 96 (manufactured by Roche) and MagNA Pure 96 Cellular RNA Large Volume Kit (manufactured by Roche). Using the prepared total RNA as a template, cDNA was prepared using SMARTer RACE 5'/3' Kit (manufactured by Clontech).
- a PCR reaction is performed by combining the kit-attached universal primer A mix (containing a forward primer) and a reverse primer encoding a human IgG heavy chain constant region or light chain constant region. was performed using PrimeSTAR Max DNA Polymerase (manufactured by Takara Bio Inc.) to amplify the heavy chain antibody gene fragment and the light chain antibody gene fragment.
- sequence identification by DNA sequence analysis by direct sequencing method or by DNA sequence analysis by subcloning method using Zero Blunt TOPO PCR Cloning Kit for Sequencing did not occur in the amplified heavy chain antibody gene fragment and light chain antibody gene fragment.
- DNA sequence analysis by the direct sequencing method was carried out by adding 4 ⁇ L of ExoSAP-IT-Express (manufactured by Thermo Fisher) to 10 ⁇ L of the PCR product, and reacting at 37° C. for 4 minutes and 80° C. for 1 minute. A sample diluted with sterilized water was used as a template, and primers corresponding to the terminal sequences of the primers used for nested-PCR were used.
- DNA sequence analysis by a subcloning method using Zero Blunt TOPO PCR Cloning Kit for Sequencing was performed according to the following procedure. After inserting the PCR product into a pCR4 vector (manufactured by Invitrogen), the resulting plasmid was introduced into Escherichia coli DH5 ⁇ strain.
- DNA sequence analysis was performed using the M13 primer attached to the Zero Blunt TOPO PCR Cloning Kit for Sequencing, using the plasmid extracted from the obtained transformant using an automatic plasmid extractor (manufactured by Kurabo Industries) as a template.
- Table 1 shows the clone name of the CD131 antibody, the amino acid sequence deduced from the entire nucleotide sequence encoding VH, the amino acid sequence of CDR1-3 of VH (hereinafter sometimes referred to as HCDR1-3), and VL.
- the sequence numbers of the amino acid sequence deduced from the entire base sequence and the amino acid sequence of VL CDR1-3 (hereinafter sometimes referred to as LCDR1-3) are shown.
- Table 2 shows the clone name of the CD116 antibody, the amino acid sequence deduced from the entire nucleotide sequence encoding VH, the amino acid sequence of CDR1-3 of VH (hereinafter sometimes referred to as HCDR1-3), and VL.
- the sequence numbers of the amino acid sequence deduced from the entire base sequence and the amino acid sequence of VL CDR1-3 (hereinafter sometimes referred to as LCDR1-3) are shown.
- VH DNA fragment and the VL DNA fragment having the nucleotide sequence shown in SEQ ID NO: 91 were inserted into a vector in which the tag sequence of phagemid pCANTAB 5E (manufactured by Amersham Pharmacia) was changed to a FLAG-His tag and a trypsin recognition sequence.
- E. coli TG1 manufactured by Lucigen was transformed to obtain an E. coli library.
- the resulting E. coli library was amplified and infected with VCSM13 Interference Resistant Helper Phage (manufactured by Agilent Technologies) to obtain CD116 having the VL nucleotide sequence shown in SEQ ID NO: 91 and a library of VH genes.
- An antibody phage library was obtained.
- the human CD116 soluble antigen (His-tagged) and the monkey CD116 soluble antigen (His-tagged) prepared in Example 1-(3) were converted to EZ-Link Sulfo-HNS-LC-Biotin, No-Weight Format (Thermo Fisher Scientific) to obtain biotinylated human CD116 soluble antigen (His-tagged) and biotinylated monkey CD116 soluble antigen (His-tagged).
- Biotinylated human CD116 soluble antigen (His-tagged) and CD116-immune human antibody M13 phage library were reacted at room temperature for 1-2 hours, then streptavidin (manufactured by Thermo Fisher) was immobilized and SuperBlock Blocking Buffer ( It was added to MAXISORP STARTUBE blocked using Thermo Fisher).
- Plasmids were prepared from transformed E. coli obtained by infecting TG1 with the concentrated phage.
- Mix & Go Competent Cells-Strain TG1 (manufactured by Zymo Research) was transformed with the prepared plasmid, and plated on a SOBAG plate (2.0% tryptone, 0.5% yeast extract, 0.05% NaCl, 2.0% glucose). , 10 mM MgCl 2 , 100 ⁇ g/mL ampicillin, 1.5% agar) to form colonies. After colonies were inoculated and cultured for several hours, 1 mM IPTG (manufactured by Nacalai Tesque) was added and cultured again to obtain a monoclonal Escherichia coli culture supernatant.
- streptavidin manufactured by Thermo Fisher
- MAXISORP plate manufactured by NUNC
- BSA-PBS manufactured by Nacalai Tesque
- biotinylated human CD116 soluble antigen was applied.
- His-tagged or biotinylated monkey CD116 soluble antigen (His-tagged) was conjugated.
- Each E. coli culture supernatant was added to each well of the plate, reacted at room temperature for 60 minutes, and then each well was washed with PBS-T three times.
- HRP-labeled goat poly, anti-human IgG F(ab') 2 (manufactured by Abcam) was diluted 1000-fold with 1% BSA-PBS, added to each well by 50 ⁇ L, and incubated at room temperature for 30 minutes. After washing the microplate three times with PBS-T, 50 ⁇ L of TMB coloring substrate solution (manufactured by DAKO) was added to each well and incubated at room temperature for 10 minutes. A 2N HCl solution (50 ⁇ L/well) was added to each well to stop the color development reaction, and absorbance at a wavelength of 450 nm (reference wavelength of 570 nm) was measured using a plate reader (EnSpire: manufactured by Perkin Elmer).
- Expi293 (trademark) Expression System (manufactured by Thermo Fisher) using cells transiently transfected with the human and monkey CD116 full-length expression vectors prepared in Example 1-(2) and non-transfected cells. .
- Each cell was suspended in 1% BSA-PBS (manufactured by Nacalai Tesque), dispensed into a 96-well plate at 1-2 ⁇ 10 5 cells/well, incubated on ice for 30 minutes, and then centrifuged ( 2000 rpm for 2 minutes).
- E. coli culture supernatant and anti-FLAG M2 Antibody (manufactured by SIGMA) were dispensed at 20-50 ⁇ L/well and allowed to react on ice for 30 minutes. After centrifugation and washing with 1% BSA-PBS 1-2 times, APC-labeled Goat anti-Mouse IgG (H+L) antibody (manufactured by Southern Bio) diluted with 1% BSA-PBS was added at 50 ⁇ L/well. The mixture was added and allowed to react for 30 minutes on ice in the dark.
- Table 3 shows the clone name of the anti-CD116 antibody whose VL amino acid sequence is SEQ ID NO: 30, the amino acid sequence deduced from the entire nucleotide sequence encoding VH, and CDR1-3 of VH (hereinafter referred to as HCDR1-3) SEQ ID NO: of the amino acid sequence of the
- Example 3 Production and activity evaluation of IgG-type bispecific antibody that binds to CD131 and CD116 (1) Production of IgG-type bispecific antibody that binds to CD131 and CD116 An IgG-type bispecific antibody expression vector having the sequence of the CD116 antibody was constructed. The structure of the IgG-type bispecific antibody, the article Mabs, 7, 377 (2015), and the article Protein Engineering, Design & Selection, 29, 457, (2016) with reference to Kobs-into-Holes described in Figure 2 The bispecific antibody having a hetero H chain used is hereinafter referred to as an IgG-type CD131-CD116 bispecific antibody.
- a DNA fragment having a nucleotide sequence encoding the amino acid sequence is ligated to a DNA fragment having a nucleotide sequence encoding the amino acid sequence shown in any one of SEQ ID NOs: 12, 14, 16, 18 and 20 as the L chain variable region.
- an antibody expression vector against the second antigen CD131
- a DNA fragment having the amino acid sequence shown in any one of SEQ ID NOS: 21, 23, 25, 27 and 29 as an H chain variable region, and an H chain constant region A DNA fragment having a nucleotide sequence encoding the amino acid sequence shown in SEQ ID NO: 142 containing Y349C/T366S/L368A/Y407V/H435R/Y436F mutations for making a heterozygous H chain is ligated to form an L chain variable region.
- any combination of the antibody expression vector against the first antigen (CD116) and the antibody expression vector against the second antigen (CD131) was combined with Expi293 cells using the Expi293TM Expression System (manufactured by Thermo Fisher). 16 hours after gene transfer, a Transfection Enhancer was added to express a total of 25 types of IgG-type bispecific antibodies in a transient expression system.
- the culture supernatant was collected, filtered through a membrane filter with a pore size of 0.22 ⁇ m (manufactured by MILLIPORE), and then using Protein A resin (POROS MabCapture A Affinity Chromatography Resin, manufactured by Thermo Scientific).
- Antibodies were affinity purified. A 20 mM sodium citrate, 150 mM NaCl buffer (pH 6.0) was used as a washing solution. The antibody adsorbed to Protein A was eluted with 40 mM sodium acetate, 500 mM calcium chloride buffer (pH 4.6) and collected in a tube containing 1 M sodium phosphate buffer (pH 7.0).
- the concentration of the obtained IgG-type CD131-CD116 bispecific antibody was calculated by measuring the absorbance at a wavelength of 280 nm and using the extinction coefficient estimated from the amino acid sequence of each antibody.
- SFM medium GFM medium
- each IgG-type CD131-CD116 bispecific antibody sample was prepared at 5 times the final concentration using Macrophage-SFM medium, added at 20 ⁇ L/well, and statically cultured at 37° C. and 5% CO 2 conditions for 3 days. bottom.
- luminescence reagent CellTiter-Glo2.0 Promega was added at 100 ⁇ L/well, and luminescence intensity by ATP luciferase reaction was measured using a microplate reader ARVO (PerkinElmer).
- the proliferation rate of TF-1 cells by each IgG-type CD131-CD116 bispecific antibody was calculated, taking the average value of luminescence in the 200 pM recombinant human GM-CSF added group as 100%. Representative results are shown in FIGS. 3A and 3B.
- each IgG-type CD131-CD116 bispecific antibody exhibited agonistic activity.
- Example 4 Production of bispecific antibody that binds to CD131 and CD116 and activity evaluation (1) Production of bispecific antibody that binds to CD131 and CD116 Having the anti-CD131 antibody sequence and anti-CD116 antibody sequence obtained in Example 2 Bispecific antibodies shown in Table 4 were generated.
- the structure of the bispecific antibody has the N-terminal structure shown in FIG. is shown in SEQ ID NO: 144), VH2 is the VH of the anti-CD116 antibody, the constant region is human IgG4PE R409K described in International Publication No. 2006/033386 (amino acid sequence is shown in SEQ ID NO: 145), wild-type IgG1, or internationally published
- the constant region sequence of a human antibody such as the human IgG1 LALAGA variant (amino acid sequence shown in SEQ ID NO: 146) described in 2006/031653, or a modified sequence thereof (amino acid sequence shown in SEQ ID NOS: 147-172).
- a specific antibody Such bispecific antibodies are hereinafter referred to as CD131-CD116 bispecific antibodies.
- a pCI-OtCMV_hK vector with a signal sequence and a human L chain ( ⁇ chain) constant region sequence was used as the L chain expression vector.
- H chain expression vector pCI-OtCAG_hG4PE (R409K) vector with signal sequence and human IgG4PE R409K or pCI-OtCAG_hG1LALAGA vector with human IgG1LALAGA was used.
- R409K pCI-OtCAG_hG4PE
- a DNA fragment having the base sequence shown by SEQ ID NO: 91 of the fully synthesized VL was inserted into an appropriate restriction enzyme site of the pCI-OtCMV_hK vector to obtain a CD131-CD116 bispecific antibody L chain expression vector.
- DNA fragment having the nucleotide sequence of anti-CD131 antibody VH shown in SEQ ID NO: 173 a DNA fragment having the nucleotide sequence encoding human IgG4 CH1 shown in SEQ ID NO: 177, and amino acid sequences shown in SEQ ID NOS: 175-186.
- a DNA fragment having a nucleotide sequence encoding the amino acid sequence of any one anti-CD116 antibody VH was prepared by total synthesis or PCR amplification, and the three DNA fragments were ligated by assemble PCR, followed by pCI-OtCAG_hG4PE (R409K), Alternatively, it was inserted into an appropriate restriction enzyme site of the pCI-OtCAG_hG1LALAGA vector to obtain an H chain expression vector for the CD131-CD116 bispecific antibody.
- the prepared CD131-CD116 bispecific antibody L chain expression vector and H chain expression vector were transfected by the following method, and the CD131-CD116 bispecific antibody was expressed and purified.
- the CD131-CD116 bispecific antibody L chain expression vector and H chain expression vector were co-transfected into Expi293 cells, and after 16 hours, a Transfection Enhancer was added. The antibody was expressed in a transient expression system.
- the culture supernatant was collected, filtered through a membrane filter with a pore size of 0.22 ⁇ m (manufactured by MILLIPORE), and then the antibody was affinity purified using Protein A resin (MabSelect, manufactured by GE Healthcare). bottom. D-PBS(-) was used as a washing solution. The antibody adsorbed to Protein A was eluted with 20 mM sodium citrate, 50 mM NaCl buffer (pH 3.4) and collected in a tube containing 1 M sodium phosphate buffer (pH 7.0).
- the concentration of the obtained CD131-CD116 bispecific antibody was calculated by measuring the absorbance at a wavelength of 280 nm and using the extinction coefficient estimated from the amino acid sequence of each antibody.
- a bispecific antibody whose Fc region is wild-type IgG1 was added using the enzyme IdeS (manufactured by Promega).
- a bispecific antibody from which the Fc region was removed was prepared by treating according to the protocol and performing size exclusion chromatography using a Superdex200increase column (manufactured by GE Healthcare).
- the human CD131 or CD116 soluble antigen (His-tagged) prepared in Example 1 was adjusted to 5 ⁇ g/mL with D-PBS (-) (manufactured by Nacalai Tesque) and applied to a 96-well or 384-well ELISA plate ( MAXISORP NUNC-IMMNO PLATE, Thermo Fisher Scientific) at 50 ⁇ L/well or 25 ⁇ L/well, allowed to stand overnight at 4° C. for adsorption, then washed 2-3 times with PBS.
- %BSA-PBS manufactured by Nacalai Tesque
- a CD131-CD116 bispecific antibody solution was dispensed at 50 ⁇ L/well or 25 ⁇ L/well and allowed to stand at room temperature for 1 hour. After washing this plate three times with PBST, peroxidase-labeled Goat Anti-Human IgG, Fc ⁇ fragment specific antibody (Jackson ImmunoResearch, Cat # 109-035-008) diluted with 1% BSA-PBS was added at 50 ⁇ L/well or 25 ⁇ L/well was dispensed and allowed to stand at room temperature for 1 hour.
- This plate was washed three times with PBST, and then treated with ABTS (2,2'-Azino-bis (3-ethylbenzothiazoline-6-sulfonic Acid, manufactured by Wako, Cat # 016-08521) substrate solution or TMB substrate solution (Thermo Fisher). ) was added at 50 ⁇ L/well or 25 ⁇ L/well to develop color, and when appropriate color development was obtained, an equal volume of 1% SDS solution or 0.5 mol/L sulfuric acid was added to stop color development.
- ABTS 2,2'-Azino-bis (3-ethylbenzothiazoline-6-sulfonic Acid, manufactured by Wako, Cat # 016-08521) substrate solution or TMB substrate solution (Thermo Fisher).
- the absorbance (415 nm-490 nm) at a sample wavelength of 415 nm and a reference wavelength of 490 nm or the absorbance (450 nm-570 nm) at a sample wavelength of 450 nm and a reference wavelength of 570 nm was measured using a plate reader (Spectra Max, manufactured by Molecular Devices, or Spark 10M, manufactured by TECAN). was measured using
- the CD131-CD116 bispecific antibody binds to human CD131 or CD116.
- Example 4 131-16 (VH amino acid sequence is shown in SEQ ID NO: 23, VL amino acid sequence is shown in SEQ ID NO: 24) combined with 43 types, 131-B2 (VH amino acid sequence) SEQ ID NO: 29, the amino acid sequence of VL is shown in SEQ ID NO: 30), CD131-CD116 bispecific antibodies having different VH sequences of anti-CD116 antibodies were prepared and analyzed for agonist activity. It was found that bispecific antibodies from
- CD131-CD116 bispecific antibody against human CD14-positive monocytes Human monocytes are differentiated into macrophages in vitro by culturing with the addition of recombinant human GM-CSF. The expression of CD14, a marker molecule for macrophages, is decreased, and the expression of CD206, a marker molecule for macrophages, is increased. Therefore, the agonistic activity of the CD131-CD116 bispecific antibody against human monocytes was evaluated using changes in CD206 expression accompanying differentiation from monocytes to macrophages as an index. In addition, Evaluation was performed by observing the morphology of the cells.
- CD131-CD116 bispecific antibodies GM398, GM408, GM413, GM435, GM463, GM464, GM466, constant regions using IgG4PE R409K
- Human CD14-positive monocytes were prepared from frozen human peripheral blood mononuclear cells (AllCells) using human CD14 microbeads (Miltenyi) and LS Columns (Miltenyi Biotec). The prepared CD14-positive monocytes were adjusted to 1.6 ⁇ 10 6 cells/mL in a culture medium [RPMI1640 (nacalai tesque) + 10% FBS + 1% Penicillin-Streptomycin, Mixed Solution (nacalai tesque)], and the conditions were 50 ⁇ L/well. was seeded in 96-well flat bottom plates (Nunc).
- CD131-CD116 bispecific antibody prepared in medium to final concentrations of 4000, 800, 160, 32, 6.4, 1.28 pM, and final concentrations of 2000, 400, 80, 16, 3 .2, CD131-CD116 bispecific antibodies (GM398, GM408, GM413, GM435, GM463, GM466, all using IgG4PE R409K constant regions) prepared in medium to 0.64 pM and recombinant human GM- 50 ⁇ L/well of CSF (R&D Systems) was added and co-cultured with CD14-positive monocytes under conditions of 37° C. and 5% CO 2 for 7 days.
- the morphology of the cells cultured for 7 days with each concentration of CD131-CD116 bispecific antibody or recombinant human GM-CSF was photographed and observed using the EVOS XL Core Imaging System (Thermo Fisher Scientific).
- the cells attached to the bottom of the plate were peeled off and collected.
- the collected cells were FcR-blocked with FcR Blocking Reagent, human (Miltenyi Biotec).
- FcR Blocking Reagent human (Miltenyi Biotec).
- each molecule on the cell surface was stained with a fluorescently labeled anti-human CD14 antibody (BioLegend) or anti-human CD206 antibody (BD Bioscience), and the fluorescence intensity was measured with FACS Canto II (BD Bioscience). The results are shown in FIG.
- CD131-CD116 bispecific antibody As shown in FIG. 8, a concentration-dependent increase in CD206 expression was observed in all cells to which the CD131-CD116 bispecific antibody and recombinant human GM-CSF were added. In addition, the efficiency of the CD131-CD116 bispecific antibody to increase the expression of CD206 was comparable to that of recombinant human GM-CSF.
- bispecific antibodies of the present invention exhibit agonistic activity equivalent to GM-CSF on CD14-positive monocytes derived from human peripheral blood mononuclear cells, and induce differentiation into macrophages.
- Example 5 Analysis of specificity of CD131-CD116 bispecific antibody to GM-CSF receptor (1) Construction of human GM-CSF receptor, IL-3 receptor, IL-5 receptor expression vector GM- CSF receptor, IL-3 receptor, and IL-5 receptor have CD131 as a receptor component in common. Therefore, the specificity of the obtained CD131-CD116 bispecific antibody to the GM-CSF receptor was analyzed.
- the human GM-CSF receptor, IL-3 receptor, and IL-5 receptor expression vectors contain EcoRI and Kozak sequences, 3 It was constructed by adding a stop codon and a NotI sequence to the ' end and inserting it into pEF6/Myc-His C (Invitrogen) digested with EcoRI and NotI.
- Human GM-CSF receptor expression vector extracellular domain of CSF2RA (CD116, UniProt Entry. No. P15509), extracellular domain of CSF2RB (CD131, UniProt Entry. No. P32927), Azami-Green sequence furin Amino acid sequence connected across a protein recognition sequence (SEQ ID NO: 147)
- Human IL-3 receptor expression vector IL3RA (CD123, UniProt Entry. No. P26951) extracellular domain, CSF2RB (CD131, UniProt Entry. No.
- human GM-CSF R&D Systems
- human IL-3 R&D Systems
- IL-5 R&D Systems
- medium for drug selection 10% FBS (GIBCO), 50 ⁇ g/mL Gentamycin (nacalai tesque), 50 mg/mL G418 (nacalai tesque), RPMI1640 (nacalai tesque), hereinafter also referred to as selection medium
- selection medium 10% FBS (GIBCO), 50 ⁇ g/mL Gentamycin (nacalai tesque), 50 mg/mL G418 (nacalai tesque), RPMI1640 (nacalai tesque), hereinafter also referred to as selection medium
- Ba/F3 cells expressing the prepared human GM-CSF receptor, human IL-3 receptor, or human IL-5 receptor are respectively Ba/F3-hGM-CSFR, Ba/F3-hIL-3R, or We will refer to it as Ba/F3-hIL-5R.
- the cells were suspended in an assay medium [10% FBS (GIBCO), 50 ⁇ g/mL Blasticidin (InvivoGen), RPMI1640 (nacalai tesque)] at 5.0 ⁇ 10 4 cells/mL, and seeded on a 96-well plate at 80 ⁇ L/well. .
- an assay medium 10% FBS (GIBCO), 50 ⁇ g/mL Blasticidin (InvivoGen), RPMI1640 (nacalai tesque)
- CD131-CD116 bispecific antibody, recombinant human GM-CSF (R&D Systems), recombinant human IL-3 (R&D Systems), or recombinant human IL-5 (R&D Systems) at 5 times the final concentration in medium was added at 20 ⁇ L/well, and statically cultured for 3 days under conditions of 37° C. and 5% CO 2 .
- the luminescence reagent CellTiter-Glo2.0 (Promega) was added at 100 ⁇ L/well, and the luminescence intensity due to the ATP luciferase reaction was measured using a microplate reader ARVO (PerkinElmer).
- the proliferation rate of each CD131-CD116 bispecific antibody sample was calculated by setting the average value of luminescence in the group added with 1 nM of recombinant human GM-CSF, IL-3, and IL-5 as 100%. The results are shown in (A) to (C) of FIG.
- the CD131-CD116 bispecific antibody showed cell proliferation activity only against Ba/F3 expressing human GM-CSF receptor, and human IL-3 receptor. It did not show cell proliferation activity against Ba/F3 expressed with cytoplasmic or IL-5 receptors. Therefore, it was confirmed that the CD131-CD116 bispecific antibody exhibited agonistic activity specifically to the GM-CSF receptor.
- Example 6 Analysis of agonist activity of CD131-CD116 bispecific antibody in the presence of anti-GM-CSF neutralizing antibody Agonist activity was analyzed in the presence of the sum antibody.
- GM-CSF neutralizing antibody a goat anti-human GM-CSF polyclonal antibody (R&D), whose GM-CSF neutralizing activity has been reported in the literature [Protein Eng Des Sel., 28, 461 (2015)] was used. .
- TF-1 cells After washing the TF-1 cells in the same manner as in Example 3, they were suspended in Macrophage-SFM medium (GIBCO) at 3.3 ⁇ 10 5 cells/mL, and added to 96-well plate (Greiner) at 60 ⁇ L per well. , 2.0 ⁇ 10 4 cells/well.
- GEBCO Macrophage-SFM medium
- Reiner 96-well plate
- GM-CSF and CD131-CD116 bispecific antibody were diluted with Macrophage-SFM medium to 100 pM and added at 20 ⁇ L/well. Further, the GM-CSF neutralizing antibody was diluted with Macrophage-SFM medium to 1000 nM, and 10-fold serial dilutions were prepared and added at 20 ⁇ L/well.
- the CD131-CD116 bispecific antibody of the present invention has GM-CSF receptor agonist activity even in the presence of a GM-CSF neutralizing antibody.
- Example 7 Production and activity evaluation of bispecific antibodies that bind to CD131 and CD116 (1) Acquisition of anti-CD116 monoclonal antibody using next-generation sequencing system Using DNA prepared from E. coli obtained by infecting with, sequence analysis was performed with the Ion S5 (trademark) system (manufactured by Thermo Fisher Scientific). The amino acid sequences shown were selected.
- bispecific antibody expression vector having the anti-CD116 antibody sequence and the anti-CD131 antibody sequence obtained in Examples 7-(1) and (2) was prepared.
- the structure of the bispecific antibody has the N-terminal structure shown in FIG. is represented by SEQ ID NO: 144), VH2 is the VH of the anti-CD116 antibody, and the constant region is human IgG4PE R409K with an amino acid residue substitution of H435F represented by the EU index (amino acid sequence is represented by SEQ ID NO: 155)
- Human antibody CD131-CD116 bispecific antibody, which is the constant region sequence of The same light chain as GM408 was used as the light chain.
- a pCI-OtCMV_hK vector with a signal sequence and a human L chain ( ⁇ chain) constant region sequence was used as the L chain expression vector.
- a pcDNA3.4 vector (manufactured by Thermo Fisher Scientific) having a signal sequence and human IgG4PE R409K and H435F mutations was used as the H chain expression vector.
- the L chain expression vector and H chain expression vector of the CD131-CD116 bispecific antibody produced were transfected, expressed and purified in the same manner as in Example 4 to obtain the CD131-CD116 bispecific antibody.
- Example 7-(2) Analysis of binding activity of CD131-CD116 bispecific antibody to CD116
- the clones obtained in Example 7-(2) were evaluated for affinity to CD116 using the Biacore T200 system (Cytiva).
- HBS-EP+buffer (Cytiva) was used as a running buffer.
- Anti-human Fc antibody was immobilized on the surface of CM5 Sensor chip (Cytiva) using Anti-human antibody capture kit and Amine Coupling Kit (Cytiva). At this time, each antibody was also immobilized on a control flow cell.
- a chip on which Anti-human Fc was immobilized was used to evaluate the binding of the CD131-CD116 bispecific antibody to the CD116 protein.
- a CD131-CD116 bispecific antibody diluted to 10 nM was added for 90 sec (flow rate: 10 ⁇ L/min) to capture the CD131-CD116 bispecific antibody on the chip.
- the human CD116 soluble antigen (His-tagged) prepared in Example 1-(3) diluted to 0.33, 1, 3, 9 or 27 nM was added at a time of 120 sec (flow rate: 30 ⁇ L/min), and the dissociation time was Measurement was performed for 90 sec (flow rate: 30 ⁇ L/min).
- concentrations of 3, 9, 27, 81 or 243 nM were added.
- both CD131-CD116 bispecific antibodies exhibited agonist activity comparable to recombinant human GM-CSF.
- Example 8 Preparation of CD116-CD131 bispecific antibody and analysis of agonist activity Regarding the three types of N-terminal CD131-CD116 bispecific antibodies (GM408, GM463, GM466) shown in Example 4, (A ), the N-terminal CD116-CD131 bispecific antibody was prepared in the same manner as in Example 4 (1) by replacing VH1 and VH2 shown in ) (GM408 inverse, GM463 inverse, GM466 inverse, and constant regions using IgG4PE R409K ). The agonist activities of these CD116-CD131 bispecific antibodies were analyzed in the same manner as in Example 3(2). The results are shown in FIG.
- Example 9 Preparation of C-terminal CD131-CD116 bispecific antibody and C-terminal CD116-CD131 bispecific antibody and analysis of agonist activity
- Three types of N-terminal CD131-CD116 bispecific antibodies shown in Example 4 GM408, GM463, GM466), two types of C-terminal bispecific antibodies were prepared. As shown in FIG.
- CD131-CD116 bispecific antibody Ct GM408, Ct GM463, Ct GM466, having a CD131-binding VH sequence in VH1 and a CD116-binding VH sequence in VH2; Both use IgG4PE R409K) and a C-terminal CD116-CD131 bispecific antibody (Ct GM408 inverse, Ct GM463 inverse, Ct GM466 inverse, constant All regions used IgG4PE R409K) were prepared in the same manner as in Example 3(2) and analyzed for agonist activity. The results are shown in FIGS. 14A and 14B.
- the C-terminal CD116-CD131 bispecific antibody shown in FIG. 14 (B) has high GM-CSF receptor agonist activity. It was confirmed that
- Example 10 Conversion of CD131-CD116 bispecific antibody to IgG type bispecific antibody and agonist activity analysis Regarding the three types of N-terminal CD131-CD116 bispecific antibodies (GM408, GM463, GM466) shown in Example 4 , as an IgG-type CD131-CD116 bispecific antibody shown in FIG. 2, was prepared in the same manner as in Example 3 (1).
- FIG. 15 shows the result of analyzing the agonist activity of the prepared IgG-type CD131-CD116 bispecific antibody in the same manner as in Example 3(2). As a result of analysis, it was confirmed that all of these IgG-type CD131-CD116 bispecific antibodies exhibit GM-CSF receptor agonist activity.
- Example 11 Analysis of CD131-CD116 bispecific antibody that exhibits high activity
- GM408 described in Example 4
- a variant in which the valency of the anti-CD131 antibody and the anti-CD116 antibody is controlled was prepared.
- the effect on the GM-CSF receptor agonist activity was analyzed.
- each variant was prepared in the same manner as in Examples 3 (1) and 4 (1) (both constant regions used IgG4PE R409K).
- D31A and Y98A 2 amino acid mutations (D31A and Y98A, denoted as D31A_Y98A) were introduced into CDR1 and CDR3 of anti-CD116 antibody 116-408. CD116-binding activity was completely lost. VHs were produced.
- Example 3 (1) since the light chain variable regions are all the same, unlike Example 3 (1), the first H chain, the second H chain, and the L chain constant region are wild-type, which do not contain mutations. used an array. Each variant was analyzed for agonist activity in the same manner as in Example 3(2). The results are shown in FIGS. 17(A) and (B).
- the numbers in parentheses represent (valence of anti-CD116 antibody x valence of anti-CD131 antibody).
- GM408WT 2 ⁇ 2
- GM408v1 (2 ⁇ 1)
- GM408v2 (1 ⁇ 2)
- GM408v3 (1 ⁇ 1)
- GM408v6 (1 ⁇ 1)
- GM408v7 (1 ⁇ 2)
- GM408v8 2 ⁇ 1
- GM408v4 (0 ⁇ 2) and GM408v5 (2 ⁇ 0) could not confirm GM-CSF receptor agonist activity, confirming that binding to both CD116 and CD131 is important for exerting agonist activity. was done.
- Example 12 Epitope analysis of CD131-CD116 bispecific antibody For anti-CD116 antibody 116-408 and anti-CD131 antibody 131-B2, which constitute the CD131-CD116 bispecific antibody described in Example 4, the respective antigens Certain human CD116 and human CD131 epitopes were analyzed by Integral Molecular.
- human CD116 289 amino acids of the full-length human CD116 extracellular domain were substituted, and for human CD131, 100 amino acids corresponding to human CD131 extracellular domain 3 were substituted (289 types of human CD116 amino acid substitutes, human 131 amino acid substitutes 100 types of expression vectors were constructed for ).
- Fabs were prepared from anti-CD116 antibody 116-408 and anti-CD131 antibody 131-B2 by enzymatic treatment, adjusted to 0.25 ⁇ g/mL using PBS, and added to mutant human CD116 or human CD131-expressing HEK-293T at 25°C. for 30 minutes. After washing with PBS, secondary antibody anti (AlexaFluor (registered trademark) 488 AffiniPure Goat Anti-Human IgG F(ab') 2 Fragment, manufactured by Jackson ImmunoResearch) adjusted to 7.5 ⁇ g/mL with PBS was added at 25°C for 30 minutes. After reacting for 1 minute, the amount of Fab binding was analyzed by flow cytometry.
- Mutant human CD116 and mutant human CD131 have an expression level of 70% or more of wild-type human CD116 and wild-type human CD131, respectively, and the Ala substitution site attenuates the Fab binding level to 40% or less Amino acids constituting epitopes was selected as a residue.
- Table 6 shows the results.
- N156, K158 and T187 in human CD116 were identified as epitopes for anti-CD116 antibody 116-408, and W163 and R221 in human CD131 as epitopes for anti-CD131 antibody 131-B2.
- Example 4 (1 ) (constant regions used were IgG4PE R409K and IgG1 LALAGA, shown in SEQ ID NOS: 147-159 and SEQ ID NOS: 160-172, respectively).
- the human FcRn-binding activity of the produced CD131-CD116 bispecific antibody mutant was analyzed by the surface plasmon resonance method (SPR method) as described below.
- Biacore T100 and T200 were used.
- Amine Coupling Kit manufactured by GE Healthcare
- Anti-His Antibody (BSA-Free, manufactured by QIAGEN) diluted to 20 ⁇ g/mL with Acetate 4.5 (manufactured by GE Healthcare) was applied to the CM5 sensor chip according to the package insert.
- Human FcRn (in-house preparation) was diluted with HBS-EP+ (pH 7.4, GE Healthcare) to 10 ⁇ g/mL and added at a flow rate of 10 ⁇ L/min for 120 seconds.
- a CD131-CD116 bispecific antibody variant (diluted with HBS-EP+ solution of pH 6.0) diluted by 2-fold serial dilutions from 1000 nM was added as an analyte at a flow rate of 30 ⁇ L/min, and FcRn was added.
- the binding reaction was measured for 60 seconds and the dissociation reaction for 150 seconds.
- the measurement was performed by the equilibrium value analysis method, and the obtained sensorgram was analyzed using Bia Evaluation Software (manufactured by GE Healthcare). The results are shown in FIGS. 18A to 18C, 19 and 20.
- FIG. 18A to 18C, 19 and 20 The results are shown in FIGS. 18A to 18C, 19 and 20.
- FIG. 19 shows a diagram plotting the equilibrium RU values at each analyte concentration for the mutants using the mutated IgG4PE R409K as the constant region. As shown in FIG. 19, it was confirmed that the mutants introduced with amino acid mutations at Tyr436 retained weak binding activity, while the mutants introduced with amino acid mutations at Ile253, His310, and His435 all lost binding. bottom.
- the mutant using the mutated IgG1 LALAGA as the constant region gave similar results to the case of using the mutated IgG4 PE R409K.
- Example 14 Analysis of Protein A binding activity of Fc mutants that have lost binding to FcRn For each mutant of the CD131-CD116 bispecific antibody prepared in Example 13, the binding activity to Protein A was compared with that of Example 13. Similarly, Biacore T100 and T200 were used.
- Protein A derived from Staphylococcus aureus, manufactured by Nacalai
- 75 RU of Protein A diluted to 1.0 ⁇ g/mL with Acetate 4.5 according to the package insert was immobilized on the CM5 sensor chip.
- the above antibody sample diluted with HBS-EP+ solution of pH 7.4
- protein A binding reaction was performed. was measured for 120 seconds, and the dissociation reaction was measured for 120 seconds.
- the CD131-CD116 bispecific antibody using wild-type IgG4PE R409K and IgG1 LALAGA lost its binding to FcRn in Example 13 under conditions where it exhibited an affinity of about 10 nM for Protein A. Many of the amino acid mutation insertions into Ile253, His310, and His435 that were confirmed to abolish Protein A binding affinity. However, the IgG4PE R409K H435F mutant and the IgG1 LALAGA H435F mutant maintained binding affinity to Protein A equivalent to that of the wild type.
- SEQ ID NO: 1 full-length nucleotide sequence of human CD131
- SEQ ID NO: 2 full-length nucleotide sequence of monkey CD131
- SEQ ID NO: 3 nucleotide sequence of human CD131 extracellular region
- SEQ ID NO: 4 nucleotide sequence of monkey CD131 extracellular region
- SEQ ID NO: 5 mouse CD131
- SEQ ID NO: 6 full-length nucleotide sequence of human CD116
- SEQ ID NO: 7 full-length nucleotide sequence of monkey CD116
- SEQ ID NO: 8 nucleotide sequence of human CD116 extracellular region
- SEQ ID NO: 9 nucleotide sequence of monkey CD116 extracellular region
- SEQ ID NO: 10 mouse CD116 extracellular domain nucleotide sequence
- SEQ ID NO: 12 116-08 VL amino acid sequence
- SEQ ID NO: 13 116-09
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Abstract
Description
1.第1の抗原結合ドメインおよび第2の抗原結合ドメインを含み、
前記第1の抗原結合ドメインおよび前記第2の抗原結合ドメインのいずれか一方がCD116に結合する抗原結合ドメインであり、もう一方がCD131に結合する抗原結合ドメインである、バイスペシフィック抗体または該バイスペシフィック抗体断片。
2.Granulocyte macrophage-colonystimulating factor(以下、GM-CSFと略記する)受容体に対してアゴニスト活性を有する、前記1に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。
3.前記第1の抗原結合ドメインおよび前記第2の抗原結合ドメインが、それぞれ重鎖可変領域(以下、VHと略記する)および軽鎖可変領域(以下、VLと略記する)を含む、前記1又は2に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。
4.CD116およびCD131に1価または2価でそれぞれ結合する、前記1~3のいずれか1に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。
5.前記CD131に結合する抗原結合ドメインが、下記(1a)~(1e)から選ばれるいずれか1である、前記1~4のいずれか1に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。
(1a)それぞれ配列番号61~63で表されるアミノ酸配列を含む相補性決定領域(以下、CDRと略記する)1~3を含むVH、および、それぞれ配列番号64~66で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(1b)それぞれ配列番号67~69で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号70~72で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(1c)それぞれ配列番号73~75で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号76~78で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(1d)それぞれ配列番号79~81で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号82~84で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(1e)それぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
6.前記CD131に結合する抗原結合ドメインが、下記(1A)~(1E)から選ばれるいずれか1である、前記1~5のいずれか1に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。
(1A)配列番号21で表されるアミノ酸配列を含むVH、および、配列番号22で表されるアミノ酸配列を含むVLを含む
(1B)配列番号23で表されるアミノ酸配列を含むVH、および、配列番号24で表されるアミノ酸配列を含むVLを含む
(1C)配列番号25で表されるアミノ酸配列を含むVH、および、配列番号26で表されるアミノ酸配列を含むVLを含む
(1D)配列番号27で表されるアミノ酸配列を含むVH、および、配列番号28で表されるアミノ酸配列を含むVLを含む
(1E)配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
7.前記CD116に結合する抗原結合ドメインが、下記(2a)~(2q)および(2r-1)~(2r-12)から選ばれるいずれか1である、前記1~6のいずれか1に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。
(2a)それぞれ配列番号31~33で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号34~36で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2b)それぞれ配列番号37~39で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号40~42で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2c)それぞれ配列番号43~45で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号46~48で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2d)それぞれ配列番号49~51で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号52~54で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2e)それぞれ配列番号55~57で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号58~60で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2f)それぞれ配列番号104~106で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2g)それぞれ配列番号107~109で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2h)それぞれ配列番号110~112で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2i)それぞれ配列番号113~115で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2j)それぞれ配列番号116~118で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2k)それぞれ配列番号119~121で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2l)それぞれ配列番号122~124で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2m)それぞれ配列番号125~127で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2n)それぞれ配列番号128~130で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2о)それぞれ配列番号131~133で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2p)それぞれ配列番号134~136で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2q)それぞれ配列番号137~139で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-1)配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列中の9番目のアルギニンをリジンに置換する改変が導入されたアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-2)配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列中の17番目のグリシンをアスパラギン酸に置換する改変が導入されたアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-3)配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列中の9番目のアルギニンをスレオニンに置換する改変が導入されたアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-4)配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列中の2番目のフェニルアラニンをロイシンに、9番目のアルギニンをスレオニンに置換する改変が導入されたアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-5)配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列中の2番目のフェニルアラニンをセリンに、9番目のアルギニンをスレオニンに置換する改変が導入されたアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-6)配列番号137で表されるアミノ酸配列の2番目のロイシンをバリンに、3番目のセリンをアラニンに、4番目のメチオニンをロイシンに置換する改変が導入されたアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-7)配列番号137で表されるアミノ酸配列の2番目のロイシンをフェニルアラニンに、3番目のセリンをアラニンに置換する改変が導入されたアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-8)配列番号137で表されるアミノ酸配列の3番目のセリンをアラニンに、4番目のメチオニンをロイシンに置換する改変が導入されたアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-9)配列番号137で表されるアミノ酸配列の2番目のロイシンをチロシンに、3番目のセリンをアラニンに置換する改変が導入されたアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-10)配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列の2番目のロイシンをグルタミン酸に置換する改変が導入されたアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-11)配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列の2番目のロイシンをグルタミン酸に、5番目のチロシンをトリプトファンに、6番目のチロシンをメチオニンに置換する改変が導入されたアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-12)配列番号137で表されるアミノ酸配列の2番目のロイシンをフェニルアラニンに、3番目のセリンをアラニンに、4番目のメチオニンをロイシンに置換する改変が導入されたアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
8.前記CD116に結合する抗原結合ドメインが、下記(2A)~(2Y)および(2Z-1)~(2Z-20)から選ばれるいずれか1である、前記1~7のいずれか1に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。
(2A)配列番号11で表されるアミノ酸配列を含むVH、および、配列番号12で表されるアミノ酸配列を含むVLを含む
(2B)配列番号13で表されるアミノ酸配列を含むVH、および、配列番号14で表されるアミノ酸配列を含むVLを含む
(2C)配列番号15で表されるアミノ酸配列を含むVH、および、配列番号16で表されるアミノ酸配列を含むVLを含む
(2D)配列番号17で表されるアミノ酸配列を含むVH、および、配列番号18で表されるアミノ酸配列を含むVLを含む
(2E)配列番号19で表されるアミノ酸配列を含むVH、および、配列番号20で表されるアミノ酸配列を含むVLを含む
(2F)配列番号92で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2G)配列番号93で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2H)配列番号94で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2I)配列番号95で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2J)配列番号96で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2K)配列番号97で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2L)配列番号98で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2M)配列番号99で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2N)配列番号100で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2O)配列番号101で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2P)配列番号102で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Q)配列番号103で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2R)配列番号176で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2S)配列番号177で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2T)配列番号178で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2U)配列番号179で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2V)配列番号182で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2W)配列番号183で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2X)配列番号184で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Y)配列番号185で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-1)配列番号190で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-2)配列番号191で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-3)配列番号192で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-4)配列番号193で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-5)配列番号194で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-6)配列番号195で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-7)配列番号196で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-8)配列番号197で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-9)配列番号198で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-10)配列番号199で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-11)配列番号200で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-12)配列番号201で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-13)配列番号202で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-14)配列番号203で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-15)配列番号204で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-16)配列番号205で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-17)配列番号206で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-18)配列番号207で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-19)配列番号208で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-20)配列番号209で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
9.前記第1の抗原結合ドメインがCD131に結合する抗原結合ドメインであり、前記第2の抗原結合ドメインがCD116に結合する抗原結合ドメインである、前記1~8のいずれか1に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。
10.前記第1の抗原結合ドメインおよび前記第2の抗原結合ドメインがそれぞれFab(以下、第1のFab、第2のFabとそれぞれ略記する)であり、
前記第1のFabは、VHおよびCH1ドメインを含む重鎖(VH1-CH1)と、軽鎖(VL-CL)とを含み、
前記第2のFabは、VHおよびCH1ドメインを含む重鎖(VH2-CH1’)と、軽鎖(VL-CL)とを含む、
前記1~9のいずれか1に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。
11.前記第1のFabおよび前記第2のFabをそれぞれ1つ、並びにヒンジ領域を含み、
前記第1のFabにおける前記重鎖のC末端と、前記第2のFabにおける前記重鎖のC末端とが、前記ヒンジ領域のN末端にそれぞれ結合している、前記10に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。
12.下記第1のポリペプチド、下記第2のポリペプチド、およびヒンジ領域を含み、前記第1のポリペプチドのC末端と前記第2のポリペプチドのC末端とが前記ヒンジ領域のN末端にそれぞれ結合している、前記10に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。
第1のポリペプチド:前記第1のFab(VH1-CH1、VL-CL)をN末端に少なくとも含む、ポリペプチド。
第2のポリペプチド:前記第2のFab(VH2-CH1’、VL-CL)をC末端に少なくとも含む、ポリペプチド。
13.前記第1のFabにおける前記重鎖のC末端と、前記第2のFabにおける前記重鎖のN末端とが直接またはリンカーを介して結合しているポリペプチド鎖(VH1-CH1-VH2-CH1’)を2本、およびヒンジ領域を含み、
2本の前記ポリペプチド鎖のC末端が前記ヒンジ領域のN末端にそれぞれ結合している、前記10に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。
14.さらにFc領域を含み、前記ヒンジ領域のC末端に前記Fc領域のN末端が結合している、前記11~13のいずれか1に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。
15.前記バイスペシフィック抗体が下記(x1)~(x12)および(x13-1)~(x13-12)から選ばれるいずれか1である、前記1~14のいずれか1に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。
(x1)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインがそれぞれ配列番号104~106で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x2)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインがそれぞれ配列番号107~109で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x3)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインがそれぞれ配列番号110~112で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x4)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインがそれぞれ配列番号113~115で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x5)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインがそれぞれ配列番号116~118で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x6)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインがそれぞれ配列番号119~121で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x7)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインがそれぞれ配列番号122~124で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x8)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインがそれぞれ配列番号125~127で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x9)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインがそれぞれ配列番号128~130で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x10)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインがそれぞれ配列番号131~133で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x11)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインがそれぞれ配列番号134~136で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x12)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインがそれぞれ配列番号137~139で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x13-1)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列中の9番目のアルギニンをリジンに置換する改変が導入されたアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x13-2)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列中の17番目のグリシンをアスパラギン酸に置換する改変が導入されたアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x13-3)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列中の9番目のアルギニンをスレオニンに置換する改変が導入されたアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(X13-4)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列中の2番目のフェニルアラニンをロイシンに、9番目のアルギニンをスレオニンに置換する改変が導入されたアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x13-5)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列中の2番目のフェニルアラニンをセリンに、9番目のアルギニンをスレオニンに置換する改変が導入されたアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x13-6)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号137で表されるアミノ酸配列の2番目のロイシンをバリンに、3番目のセリンをアラニンに、4番目のメチオニンをロイシンに置換する改変が導入されたアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x13-7)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号137で表されるアミノ酸配列の2番目のロイシンをフェニルアラニンに、3番目のセリンをアラニンに置換する改変が導入されたアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x13-8)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号137で表されるアミノ酸配列の3番目のセリンをアラニンに、4番目のメチオニンをロイシンに置換する改変が導入されたアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x13-9)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号137で表されるアミノ酸配列の2番目のロイシンをチロシンに、3番目のセリンをアラニンに置換する改変が導入されたアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x13-10)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列の2番目のロイシンをグルタミン酸に置換する改変が導入されたアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x13-11)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列の2番目のロイシンをグルタミン酸に、5番目のチロシンをトリプトファンに、6番目のチロシンをメチオニンに置換する改変が導入されたアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x13-12)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号137で表されるアミノ酸配列の2番目のロイシンをフェニルアラニンに、3番目のセリンをアラニンに、4番目のメチオニンをロイシンに置換する改変が導入されたアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
16.前記バイスペシフィック抗体が下記(y1)~(y12)および(y13-1)~(y13-20)から選ばれるいずれか1である、前記1~15のいずれか1に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。
(y1)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号175で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y2)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号176で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y3)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号177で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y4)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号178で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y5)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号179で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y6)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号180で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y7)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号181で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y8)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号182で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y9)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号183で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y10)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号184で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y11)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号185で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y12)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号186で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-1)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号190で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-2)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号191で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-3)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号192で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-4)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号193で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-5)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号194で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-6)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号195で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-7)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号196で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-8)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号197で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-9)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号198で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-10)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号199で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-11)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号200で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-12)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号201で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-13)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号202で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-14)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号203で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-15)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号204で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-16)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号205で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-17)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号206で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-18)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号207で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-19)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号208で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-20)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号209で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
17.前記ポリペプチド鎖が前記第1のFabにおける前記重鎖(VH1-CH1)のC末端と、前記第2のFabにおける前記重鎖(VH2-CH1’)のN末端とが直接またはリンカーを介して結合しているポリペプチド鎖であり、前記ポリペプチド鎖における(VH1-CH1-VH2)が下記(v1)~(v12)および(v13-1)~(v13-20)から選ばれるいずれか1である、前記13または14に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。
(v1)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号175で表されるアミノ酸配列を含むVH2を含む
(v2)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号176で表されるアミノ酸配列を含むVH2を含む
(v3)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号177で表されるアミノ酸配列を含むVH2を含む
(v4)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号178で表されるアミノ酸配列を含むVH2を含む
(v5)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号179で表されるアミノ酸配列を含むVH2を含む
(v6)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号180で表されるアミノ酸配列を含むVH2を含む
(v7)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号181で表されるアミノ酸配列を含むVH2を含む
(v8)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号182で表されるアミノ酸配列を含むVH2を含む
(v9)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号183で表されるアミノ酸配列を含むVH2を含む
(v10)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号184で表されるアミノ酸配列を含むVH2を含む
(v11)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号185で表されるアミノ酸配列を含むVH2を含む
(v12)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号186で表されるアミノ酸配列を含むVH2を含む
(v13-1)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号190で表されるアミノ酸配列を含むVH2を含む
(v13-2)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号191で表されるアミノ酸配列を含むVH2を含む
(v13-3)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号192で表されるアミノ酸配列を含むVH2を含む
(v13-4)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号193で表されるアミノ酸配列を含むVH2を含む
(v13-5)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号194で表されるアミノ酸配列を含むVH2を含む
(v13-6)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号195で表されるアミノ酸配列を含むVH2を含む
(v13-7)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号196で表されるアミノ酸配列を含むVH2を含む
(v13-8)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号197で表されるアミノ酸配列を含むVH2を含む
(v13-9)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号198で表されるアミノ酸配列を含むVH2を含む
(v13-10)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号199で表されるアミノ酸配列を含むVH2を含む
(v13-11)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号200で表されるアミノ酸配列を含むVH2を含む
(v13-12)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号201で表されるアミノ酸配列を含むVH2を含む
(v13-13)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号202で表されるアミノ酸配列を含むVH2を含む
(v13-14)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号203で表されるアミノ酸配列を含むVH2を含む
(v13-15)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号204で表されるアミノ酸配列を含むVH2を含む
(v13-16)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号205で表されるアミノ酸配列を含むVH2を含む
(v13-17)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号206で表されるアミノ酸配列を含むVH2を含む
(v13-18)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号207で表されるアミノ酸配列を含むVH2を含む
(v13-19)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号208で表されるアミノ酸配列を含むVH2を含む
(v13-20)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号209で表されるアミノ酸配列を含むVH2を含む
18.前記第1のFabにおける前記重鎖(VH1-CH1)のC末端と、前記第2のFabにおける前記重鎖(VH2-CH1’)のN末端とが直接またはリンカーを介して結合している前記ポリペプチド鎖、該ポリペプチド鎖のC末端にN末端が結合しているヒンジ領域、該ヒンジ領域のC末端にN末端が結合しているFc領域(CH2-CH3)を含む重鎖2本と、軽鎖(VL-CL)4本とを含み、
前記CH1’および前記Fc領域(CH2-CH3)が配列番号145~172のいずれか1で表されるアミノ酸配列を含み、
前記軽鎖が配列番号30で表されるアミノ酸配列を含むVLを含む、前記17に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。
A1.CD116およびCD131にそれぞれ2価で結合する、前記1~18のいずれか1に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。
A2.前記第1のFabおよび前記第2のFabをそれぞれ2つ、ヒンジ領域並びにFc領域を含み、
2つの前記第1のFabにおける前記第1の抗原結合ドメインの重鎖のC末端がそれぞれ前記ヒンジ領域のN末端に結合し、
前記ヒンジ領域のC末端が前記Fc領域のN末端に結合し、
前記Fc領域のC末端に、2つの前記第2のFabにおける前記第2の抗原結合ドメインの重鎖のN末端がそれぞれ結合している、前記10、15、16およびA1のいずれか1に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。
A3.前記Fc領域がIgG1またはIgG4サブクラスである、前記13~17、A1およびA2のいずれか1に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。
A4.前記Fc領域がIgG1サブクラスであり、EUインデックスで表されるL234A、L235AおよびG237Aのアミノ酸残基置換を含む、または前記Fc領域がIgG4サブクラスであり、EUインデックスで表されるS228P、L235EおよびR409Kのアミノ酸残基置換を含む、前記14~18およびA1~A3のいずれか1に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。
A5.前記Fc領域にさらに、EUインデックスで表されるH435Fのアミノ酸残基置換を含む、前記14~18およびA1~A4のいずれか1に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。
19.前記1~18およびA1~A5のいずれか1に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片をコードするDNA。
20.前記19に記載のDNAを含有する組換え体ベクター。
21.前記20に記載の組換え体ベクターを宿主細胞に導入して得られる形質転換株。
22.前記1~18およびA1~A5のいずれか1に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片を有効成分として含有する、GM-CSFが関与する疾患の治療および/または診断薬。
A6.前記21に記載の形質転換株を培地に培養し、培養物中に前記1~18およびA1~A5のいずれか1に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片を生産蓄積させ、該培養物からバイスペシフィック抗体または該バイスペシフィック抗体断片を採取することを特徴とする前記1~17およびA1~A5のいずれか1に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片の製造方法。
A7.GM-CSFが関与する疾患が、GM-CSFに対する自己抗体が関与する疾患である、前記22に記載の治療薬および/または診断薬。
A8.前記1~18およびA1~A5のいずれか1に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片を用いる、GM-CSFが関与する疾患の治療および/または診断方法。
A9.GM-CSFが関与する疾患がGM-CSFに対する自己抗体が関与する疾患である、前記A8に記載の治療および/または診断方法。
A10.GM-CSFが関与する疾患の治療および/または診断に使用するための、前記1~18およびA1~A5のいずれか1に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。
A11.GM-CSFが関与する疾患がGM-CSFに対する自己抗体が関与する疾患である、前記A10に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。
A12.GM-CSFが関与する疾患の治療および/または診断薬の製造のための、前記1~18およびA1~A5のいずれか1に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片の使用。
A13.GM-CSFが関与する疾患がGM-CSFに対する自己抗体が関与する疾患である、前記A12に記載の使用。
A14.前記1~18およびA1~A5のいずれか1に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片を含む、CD116およびCD131の少なくとも一方を検出または測定するための試薬。
23.Fc領域を含有する抗体をプロテインAカラムクロマトグラフィーにより精製することを含む、抗体を含有する組成物の精製方法であって、前記抗体は前記Fc領域においてH435Fの変異が導入されている抗体である、精製方法。
24.CD131(配列番号211)の163番目のW、221番目のRを含むエピトープと、CD116(配列番号210)の156番目のN、158番目のK、187番目のTを含むエピトープとに結合する、前記1~18のいずれか1に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。
B群:アスパラギン酸、グルタミン酸、イソアスパラギン酸、イソグルタミン酸、2-アミノアジピン酸、2-アミノスベリン酸
C群:アスパラギン、グルタミン
D群:リジン、アルギニン、オルニチン、2,4-ジアミノブタン酸、2,3-ジアミノプロピオン酸
E群:プロリン、3-ヒドロキシプロリン、4-ヒドロキシプロリン
F群:セリン、スレオニン、ホモセリン
G群:フェニルアラニン、チロシン
(1)Fc領域がIgG1サブクラスである場合、EUインデックスで表されるL234A、L235AおよびG237Aのアミノ酸残基置換を含むことが好ましく、これらのアミノ酸残基置換に加えてEUインデックスで表されるH435Fのアミノ酸残基置換を含むことがより好ましい。
(2)Fc領域がIgG4サブクラスである場合、EUインデックスで表されるS228P、L235EおよびR409Kのアミノ酸残基置換を含むことが好ましく、これらのアミノ酸残基置換に加えてEUインデックスで表されるH435Fのアミノ酸残基置換を含むことがより好ましい。
(1a)それぞれ配列番号61~63で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号64~66で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(1b)それぞれ配列番号67~69で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号70~72で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(1c)それぞれ配列番号73~75で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号76~78で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(1d)それぞれ配列番号79~81で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号82~84で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(1e)それぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(1A)配列番号21で表されるアミノ酸配列を含むVH、および、配列番号22で表されるアミノ酸配列を含むVLを含む
(1B)配列番号23で表されるアミノ酸配列を含むVH、および、配列番号24で表されるアミノ酸配列を含むVLを含む
(1C)配列番号25で表されるアミノ酸配列を含むVH、および、配列番号26で表されるアミノ酸配列を含むVLを含む
(1D)配列番号27で表されるアミノ酸配列を含むVH、および、配列番号28で表されるアミノ酸配列を含むVLを含む
(1E)配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2a)それぞれ配列番号31~33で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号34~36で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2b)それぞれ配列番号37~39で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号40~42で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2c)それぞれ配列番号43~45で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号46~48で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2d)それぞれ配列番号49~51で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号52~54で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2e)それぞれ配列番号55~57で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号58~60で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2f)それぞれ配列番号104~106で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2g)それぞれ配列番号107~109で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2h)それぞれ配列番号110~112で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2i)それぞれ配列番号113~115で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2j)それぞれ配列番号116~118で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2k)それぞれ配列番号119~121で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2l)それぞれ配列番号122~124で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2m)それぞれ配列番号125~127で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2n)それぞれ配列番号128~130で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2о)それぞれ配列番号131~133で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2p)それぞれ配列番号134~136で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2q)それぞれ配列番号137~139で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-1)配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列中の9番目のアルギニンをリジンに置換する改変が導入されたアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-2)配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列中の17番目のグリシンをアスパラギン酸に置換する改変が導入されたアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-3)配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列中の9番目のアルギニンをスレオニンに置換する改変が導入されたアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-4)配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列中の2番目のフェニルアラニンをロイシンに、9番目のアルギニンをスレオニンに置換する改変が導入されたアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-5)配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列中の2番目のフェニルアラニンをセリンに、9番目のアルギニンをスレオニンに置換する改変が導入されたアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-6)配列番号137で表されるアミノ酸配列の2番目のロイシンをバリンに、3番目のセリンをアラニンに、4番目のメチオニンをロイシンに置換する改変が導入されたアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-7)配列番号137で表されるアミノ酸配列の2番目のロイシンをフェニルアラニンに、3番目のセリンをアラニンに置換する改変が導入されたアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-8)配列番号137で表されるアミノ酸配列の3番目のセリンをアラニンに、4番目のメチオニンをロイシンに置換する改変が導入されたアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-9)配列番号137で表されるアミノ酸配列の2番目のロイシンをチロシンに、3番目のセリンをアラニンに置換する改変が導入されたアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-10)配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列の2番目のロイシンをグルタミン酸に置換する改変が導入されたアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-11)配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列の2番目のロイシンをグルタミン酸に、5番目のチロシンをトリプトファンに、6番目のチロシンをメチオニンに置換する改変が導入されたアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-12)配列番号137で表されるアミノ酸配列の2番目のロイシンをフェニルアラニンに、3番目のセリンをアラニンに、4番目のメチオニンをロイシンに置換する改変が導入されたアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2A)配列番号11で表されるアミノ酸配列を含むVH、および、配列番号12で表されるアミノ酸配列を含むVLを含む
(2B)配列番号13で表されるアミノ酸配列を含むVH、および、配列番号14で表されるアミノ酸配列を含むVLを含む
(2C)配列番号15で表されるアミノ酸配列を含むVH、および、配列番号16で表されるアミノ酸配列を含むVLを含む
(2D)配列番号17で表されるアミノ酸配列を含むVH、および、配列番号18で表されるアミノ酸配列を含むVLを含む
(2E)配列番号19で表されるアミノ酸配列を含むVH、および、配列番号20で表されるアミノ酸配列を含むVLを含む
(2F)配列番号92で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2G)配列番号93で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2H)配列番号94で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2I)配列番号95で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2J)配列番号96で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2K)配列番号97で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2L)配列番号98で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2M)配列番号99で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2N)配列番号100で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2O)配列番号101で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2P)配列番号102で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Q)配列番号103で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2R)配列番号176で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2S)配列番号177で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2T)配列番号178で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2U)配列番号179で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2V)配列番号182で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2W)配列番号183で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2X)配列番号184で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Y)配列番号185で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-1)配列番号190で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-2)配列番号191で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-3)配列番号192で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-4)配列番号193で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-5)配列番号194で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-6)配列番号195で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-7)配列番号196で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-8)配列番号197で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-9)配列番号198で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-10)配列番号199で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-11)配列番号200で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-12)配列番号201で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-13)配列番号202で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-14)配列番号203で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-15)配列番号204で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-16)配列番号205で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-17)配列番号206で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-18)配列番号207で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-19)配列番号208で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-20)配列番号209で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(1)第1のFab(VH1-CH1、VL-CL)および第2のFab(VH2-CH1’、VL-CL)をそれぞれ1つ、並びにヒンジ領域を含み、第1のFabにおける重鎖のC末端と、第2のFabにおける重鎖のC末端とが、該ヒンジ領域のN末端にそれぞれ結合している構造(以下、IgG型とも略称する)。
IgG型バイスペシフィック抗体は、安定性および調製時の容易さの観点から、さらにFc領域を含み、該ヒンジ領域のC末端に該Fc領域のN末端が結合している構造であることが好ましい。かかる態様のIgG型バイスペシフィック抗体の模式図を図2に示す。
(2)下記第1のポリペプチド、下記第2のポリペプチド、およびヒンジ領域を含み、第1のポリペプチドのC末端と第2のポリペプチドのC末端とが前記ヒンジ領域のN末端にそれぞれ結合している構造。
第1のポリペプチド:第1のFab(VH1-CH1、VL-CL)をN末端に少なくとも含む、ポリペプチド。
第2のポリペプチド:第2のFab(VH2-CH1’、VL-CL)をC末端に少なくとも含む、ポリペプチド。
かかる態様においては、少なくとも、第1のポリペプチドにおける第1のFabの抗原結合性と、第2のポリペプチドにおける第2のFabの抗原結合性とが保持されていることが好ましい。
かかる態様においては、さらにFc領域を含み、前記ヒンジ領域のC末端に該Fc領域のN末端が結合している構造を含むことが好ましい。かかる構造を含むことにより、第1のポリペプチドによりCD131に結合し、かつ第2のポリペプチドによりCD116に結合する高次構造をより取りやすくなる。その結果、CD116およびCD131に対して優れた結合性を示し、GM-CSF受容体に対する高いアゴニスト活性を示すと考えられる。
かかる構造の一態様としては、下記(2-1)~(2-4)が挙げられる。
(2-1)第1のFabと第2のFabとをN末端から順に含む第1のポリペプチド、第1のFabと第2のFabとをN末端から順に含む第2のポリペプチド、およびヒンジ領域を含む構造。かかる構造において、第1のポリペプチドと第2のポリペプチドは、それぞれ、第1のFabにおける重鎖(VH1-CH1)のC末端と、第2のFabにおける重鎖(VH2-CH1’)のN末端とが直接またはリンカーを介して結合しているポリペプチド鎖(VH1-CH1-VH2-CH1’)を含み、該ポリペプチド鎖のC末端が該ヒンジ領域のN末端にそれぞれ結合している(以下、かかる構造をN末端型とも略称する)。
N末端型バイスペシフィック抗体は、安定性の観点から、さらにFc領域を含み、該ヒンジ領域のC末端に該Fc領域のN末端が結合している構造であることが好ましい。かかる態様のN末端型バイスペシフィック抗体の模式図を図4の(A)に示す。具体的な一実施態様としては、例えば、図16に示されるGM408WT(2×2)が挙げられる。
(2-2)第1のFabと第2のFabとをN末端から順に含む第1のポリペプチド、第2のFabを含む第2のポリペプチド、およびヒンジ領域を含む構造。かかる構造においては、第1のポリペプチドは、第1のFabにおける重鎖(VH1-CH1)のC末端と、第2のFabにおける重鎖(VH2-CH1’)のN末端とが直接またはリンカーを介して結合しているポリペプチド鎖(VH1-CH1-VH2-CH1’)を含む。
かかる態様においては、さらにFc領域を含み、前記ヒンジ領域のC末端に該Fc領域のN末端が結合している構造を含むことが好ましい。具体的な一実施態様としては、例えば、図16に示されるGM408v8(2×1)が挙げられる。
(2-3)第1のFabと第2のFabとをN末端から順に含む第1のポリペプチド、第2のFabと第2のFabとをN末端から順に含む第2のポリペプチド、およびヒンジ領域を含む構造であり、且つ第2のポリペプチドにおけるN末端側の第2のFabについて第2の抗原に対する結合活性を失活させる変異がVH2に導入された構造。
かかる構造においては、第1のポリペプチドは、第1のFabにおける重鎖(VH1-CH1)のC末端と、第2のFabにおける重鎖(VH2-CH1’)のN末端とが直接またはリンカーを介して結合しているポリペプチド鎖(VH1-CH1-VH2-CH1’)を含む。また、第2のポリペプチドは、第2のFabにおける重鎖(VH2-CH1)のC末端と、第2のFabにおける重鎖(VH2-CH1’)のN末端とが直接またはリンカーを介して結合しているポリペプチド鎖(VH2-CH1-VH2-CH1’)を含む。
かかる態様においては、さらにFc領域を含み、前記ヒンジ領域のC末端に該Fc領域のN末端が結合している構造を含むことが好ましい。
(2-4)前記(2-1)の構造において、第2のポリペプチドにおける第2のFabについて第2の抗原に対する結合活性を失活させる変異がVH1に導入された構造。具体的な一実施態様としては、例えば、図16に示されるGM408v2(1×2)が挙げられる。
(2-5)前記(2-3)の構造において、さらに、第1のポリペプチドにおける第2のFabについて第2の抗原に対する結合活性を失活させる変異が重鎖のVH2に導入された構造。具体的な一実施態様としては、例えば、図16に示されるGM408v3(1×1)が挙げられる。
前記(2-3)~(2-5)において、第2のFabについて第2の抗原に対する結合活性を失活させるための重鎖のVH2に導入する変異としては、例えば、D31AおよびY98Aが挙げられる。
(3)第1のFab(VH1-CH1、VL-CL)および第2のFab(VH2-CH1’、VL-CL)をそれぞれ2つ、ヒンジ領域並びにFc領域を含み、2つの第1のFabにおける重鎖のC末端がそれぞれ該ヒンジ領域のN末端に結合し、該ヒンジ領域のC末端が該Fc領域のN末端に結合し、該Fc領域のC末端に、2つの第2のFabにおける重鎖のN末端がそれぞれ結合している構造(以下、C末端型とも略称する)。C末端型バイスペシフィック抗体の模式図を図4の(B)に示す。
(1a)それぞれ配列番号61~63で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号64~66で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(1b)それぞれ配列番号67~69で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号70~72で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(1c)それぞれ配列番号73~75で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号76~78で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(1d)それぞれ配列番号79~81で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号82~84で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(1e)それぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2a)それぞれ配列番号31~33で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号34~36で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2b)それぞれ配列番号37~39で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号40~42で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2c)それぞれ配列番号43~45で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号46~48で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2d)それぞれ配列番号49~51で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号52~54で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2e)それぞれ配列番号55~57で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号58~60で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2f)それぞれ配列番号104~106で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2g)それぞれ配列番号107~109で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2h)それぞれ配列番号110~112で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2i)それぞれ配列番号113~115で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2j)それぞれ配列番号116~118で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2k)それぞれ配列番号119~121で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2l)それぞれ配列番号122~124で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2m)それぞれ配列番号125~127で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2n)それぞれ配列番号128~130で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2о)それぞれ配列番号131~133で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2p)それぞれ配列番号134~136で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2q)それぞれ配列番号137~139で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-1)配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列中の9番目のアルギニンをリジンに置換する改変が導入されたアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-2)配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列中の17番目のグリシンをアスパラギン酸に置換する改変が導入されたアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-3)配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列中の9番目のアルギニンをスレオニンに置換する改変が導入されたアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-4)配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列中の2番目のフェニルアラニンをロイシンに、9番目のアルギニンをスレオニンに置換する改変が導入されたアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-5)配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列中の2番目のフェニルアラニンをセリンに、9番目のアルギニンをスレオニンに置換する改変が導入されたアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-6)配列番号137で表されるアミノ酸配列の2番目のロイシンをバリンに、3番目のセリンをアラニンに、4番目のメチオニンをロイシンに置換する改変が導入されたアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-7)配列番号137で表されるアミノ酸配列の2番目のロイシンをフェニルアラニンに、3番目のセリンをアラニンに置換する改変が導入されたアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-8)配列番号137で表されるアミノ酸配列の3番目のセリンをアラニンに、4番目のメチオニンをロイシンに置換する改変が導入されたアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-9)配列番号137で表されるアミノ酸配列の2番目のロイシンをチロシンに、3番目のセリンをアラニンに置換する改変が導入されたアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-10)配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列の2番目のロイシンをグルタミン酸に置換する改変が導入されたアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-11)配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列の2番目のロイシンをグルタミン酸に、5番目のチロシンをトリプトファンに、6番目のチロシンをメチオニンに置換する改変が導入されたアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-12)配列番号137で表されるアミノ酸配列の2番目のロイシンをフェニルアラニンに、3番目のセリンをアラニンに、4番目のメチオニンをロイシンに置換する改変が導入されたアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(1A)配列番号21で表されるアミノ酸配列を含むVH、および、配列番号22で表されるアミノ酸配列を含むVLを含む
(1B)配列番号23で表されるアミノ酸配列を含むVH、および、配列番号24で表されるアミノ酸配列を含むVLを含む
(1C)配列番号25で表されるアミノ酸配列を含むVH、および、配列番号26で表されるアミノ酸配列を含むVLを含む
(1D)配列番号27で表されるアミノ酸配列を含むVH、および、配列番号28で表されるアミノ酸配列を含むVLを含む
(1E)配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2A)配列番号11で表されるアミノ酸配列を含むVH、および、配列番号12で表されるアミノ酸配列を含むVLを含む
(2B)配列番号13で表されるアミノ酸配列を含むVH、および、配列番号14で表されるアミノ酸配列を含むVLを含む
(2C)配列番号15で表されるアミノ酸配列を含むVH、および、配列番号16で表されるアミノ酸配列を含むVLを含む
(2D)配列番号17で表されるアミノ酸配列を含むVH、および、配列番号18で表されるアミノ酸配列を含むVLを含む
(2E)配列番号19で表されるアミノ酸配列を含むVH、および、配列番号20で表されるアミノ酸配列を含むVLを含む
(2F)配列番号92で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2G)配列番号93で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2H)配列番号94で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2I)配列番号95で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2J)配列番号96で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2K)配列番号97で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2L)配列番号98で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2M)配列番号99で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2N)配列番号100で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2O)配列番号101で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2P)配列番号102で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Q)配列番号103で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2R)配列番号176で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2S)配列番号177で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2T)配列番号178で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2U)配列番号179で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2V)配列番号182で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2W)配列番号183で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2X)配列番号184で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Y)配列番号185で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-1)配列番号190で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-2)配列番号191で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-3)配列番号192で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-4)配列番号193で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-5)配列番号194で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-6)配列番号195で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-7)配列番号196で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-8)配列番号197で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-9)配列番号198で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-10)配列番号199で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-11)配列番号200で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-12)配列番号201で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-13)配列番号202で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-14)配列番号203で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-15)配列番号204で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-16)配列番号205で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-17)配列番号206で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-18)配列番号207で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-19)配列番号208で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-20)配列番号209で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(x1)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインがそれぞれ配列番号104~106で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x2)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインがそれぞれ配列番号107~109で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x3)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインがそれぞれ配列番号110~112で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x4)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインがそれぞれ配列番号113~115で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x5)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインがそれぞれ配列番号116~118で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x6)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインがそれぞれ配列番号119~121で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x7)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインがそれぞれ配列番号122~124で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x8)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインがそれぞれ配列番号125~127で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x9)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインがそれぞれ配列番号128~130で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x10)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインがそれぞれ配列番号131~133で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x11)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインがそれぞれ配列番号134~136で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x12)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインがそれぞれ配列番号137~139で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x13-1)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列中の9番目のアルギニンをリジンに置換する改変が導入されたアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x13-2)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列中の17番目のグリシンをアスパラギン酸に置換する改変が導入されたアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x13-3)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列中の9番目のアルギニンをスレオニンに置換する改変が導入されたアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(X13-4)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列中の2番目のフェニルアラニンをロイシンに、9番目のアルギニンをスレオニンに置換する改変が導入されたアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x13-5)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列中の2番目のフェニルアラニンをセリンに、9番目のアルギニンをスレオニンに置換する改変が導入されたアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x13-6)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号137で表されるアミノ酸配列の2番目のロイシンをバリンに、3番目のセリンをアラニンに、4番目のメチオニンをロイシンに置換する改変が導入されたアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x13-7)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号137で表されるアミノ酸配列の2番目のロイシンをフェニルアラニンに、3番目のセリンをアラニンに置換する改変が導入されたアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x13-8)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号137で表されるアミノ酸配列の3番目のセリンをアラニンに、4番目のメチオニンをロイシンに置換する改変が導入されたアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x13-9)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号137で表されるアミノ酸配列の2番目のロイシンをチロシンに、3番目のセリンをアラニンに置換する改変が導入されたアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x13-10)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列の2番目のロイシンをグルタミン酸に置換する改変が導入されたアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x13-11)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列の2番目のロイシンをグルタミン酸に、5番目のチロシンをトリプトファンに、6番目のチロシンをメチオニンに置換する改変が導入されたアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x13-12)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号137で表されるアミノ酸配列の2番目のロイシンをフェニルアラニンに、3番目のセリンをアラニンに、4番目のメチオニンをロイシンに置換する改変が導入されたアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(y1)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号175で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y2)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号176で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y3)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号177で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y4)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号178で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y5)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号179で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y6)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号180で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y7)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号181で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y8)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号182で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y9)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号183で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y10)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号184で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y11)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号185で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y12)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号186で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-1)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号190で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-2)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号191で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-3)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号192で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-4)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号193で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-5)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号194で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-6)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号195で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-7)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号196で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-8)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号197で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-9)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号198で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-10)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号199で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-11)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号200で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-12)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号201で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-13)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号202で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-14)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号203で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-15)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号204で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-16)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号205で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-17)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号206で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-18)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号207で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-19)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号208で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-20)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号209で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(z1)第1のFabが131-B2を含み、第2のFabが116-398を含む
(z2)第1のFabが131-B2を含み、第2のFabが116-412aを含む
(z3)第1のFabが131-B2を含み、第2のFabが116-413aを含む
(z4)第1のFabが131-B2を含み、第2のFabが116-421aを含む
(z5)第1のFabが131-B2を含み、第2のFabが116-433aを含む
(z6)第1のFabが131-B2を含み、第2のFabが116-435を含む
(z7)第1のFabが131-B2を含み、第2のFabが116-439を含む
(z8)第1のFabが131-B2を含み、第2のFabが116-463aを含む
(z9)第1のFabが131-B2を含み、第2のFabが116-464aを含む
(z10)第1のFabが131-B2を含み、第2のFabが116-465aを含む
(z11)第1のFabが131-B2を含み、第2のFabが116-466aを含む
(z12)第1のFabが131-B2を含み、第2のFabが116-408を含む
(v1)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号175で表されるアミノ酸配列を含むVH2を含む
(v2)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号176で表されるアミノ酸配列を含むVH2を含む
(v3)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号177で表されるアミノ酸配列を含むVH2を含む
(v4)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号178で表されるアミノ酸配列を含むVH2を含む
(v5)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号179で表されるアミノ酸配列を含むVH2を含む
(v6)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号180で表されるアミノ酸配列を含むVH2を含む
(v7)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号181で表されるアミノ酸配列を含むVH2を含む
(v8)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号182で表されるアミノ酸配列を含むVH2を含む
(v9)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号183で表されるアミノ酸配列を含むVH2を含む
(v10)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号184で表されるアミノ酸配列を含むVH2を含む
(v11)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号185で表されるアミノ酸配列を含むVH2を含む
(v12)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号186で表されるアミノ酸配列を含むVH2を含む
(v13-1)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号190で表されるアミノ酸配列を含むVH2を含む
(v13-2)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号191で表されるアミノ酸配列を含むVH2を含む
(v13-3)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号192で表されるアミノ酸配列を含むVH2を含む
(v13-4)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号193で表されるアミノ酸配列を含むVH2を含む
(v13-5)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号194で表されるアミノ酸配列を含むVH2を含む
(v13-6)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号195で表されるアミノ酸配列を含むVH2を含む
(v13-7)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号196で表されるアミノ酸配列を含むVH2を含む
(v13-8)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号197で表されるアミノ酸配列を含むVH2を含む
(v13-9)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号198で表されるアミノ酸配列を含むVH2を含む
(v13-10)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号199で表されるアミノ酸配列を含むVH2を含む
(v13-11)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号200で表されるアミノ酸配列を含むVH2を含む
(v13-12)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号201で表されるアミノ酸配列を含むVH2を含む
(v13-13)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号202で表されるアミノ酸配列を含むVH2を含む
(v13-14)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号203で表されるアミノ酸配列を含むVH2を含む
(v13-15)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号204で表されるアミノ酸配列を含むVH2を含む
(v13-16)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号205で表されるアミノ酸配列を含むVH2を含む
(v13-17)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号206で表されるアミノ酸配列を含むVH2を含む
(v13-18)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号207で表されるアミノ酸配列を含むVH2を含む
(v13-19)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号208で表されるアミノ酸配列を含むVH2を含む
(v13-20)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号209で表されるアミノ酸配列を含むVH2を含む
および、上記いずれかのバイスペシフィック抗体が認識するCD116および/またはCD131のエピトープを含むエピトープを認識するバイスペシフィック抗体も含まれる。
pH6.0におけるFcRnへの結合を切断して、抗体のリサイクリングを阻害する方法としては、例えば、EUインデックスで表される253番目のIle、310番目のHis、435番目のHisおよび436番目のTyrから選ばれる少なくとも1にアミノ酸残基の改変を導入することが好ましい。かかる改変としては、具体的には例えば、H435Fが挙げられる。
FcRnは細胞外(pH7.0-7.5)ではFc領域に結合せず、細胞内に取り込まれたIgGと初期エンドソーム内(pH6.0)で結合し、IgGを細胞外にリサイクルすることで血中濃度を維持していると考えられている(Biochemistry, 34, 14649 (1995) DOI: 10.1021/bi00045a005;Nat. Rev. Immunol., 7, 715 (2007) DOI: 10.1038/nri2155)。pH6.0におけるFc領域とFcRnの結合に重要な残基は、アミノ酸変異(Alaへの置換)導入により結合活性が顕著に低下する部位として探索された結果、上記したEUインデックスで表される253番目のIle、310番目のHis、435番目のHis、436番目のTyrと同定されている (J. Immunol., 176, 346(2006);Int. Immunol., 13, 993 (2001)、J. Biol. Chem., 276, 6591 (2001);J. Immunol., 169, 5171 (2002))。
本発明におけるモノクローナル抗体の製造方法は、下記の作業工程を包含する。すなわち、(1)免疫原として使用する抗原の精製および細胞表面に抗原が過剰発現した細胞の作製の少なくとも一方、(2)抗原を動物に免疫した後、血液を採取しその抗体価を検定して脾臓などを摘出する時期を決定し、抗体産生細胞を調製する工程、(3)骨髄腫細胞(ミエローマ)の調製、(4)抗体産生細胞とミエローマとの細胞融合、(5)目的とする抗体を産生するハイブリドーマ群の選別、(6)ハイブリドーマ群からの単クローン(monoclonal)細胞の分離(クローニング)、(7)場合によっては、モノクローナル抗体を大量に製造するためのハイブリドーマの培養、またはハイブリドーマを移植した動物の飼育、(8)このようにして製造されたモノクローナル抗体の生理活性およびその抗原結合特異性の検討、または標識試薬としての特性の検定、などである。
CD116またはCD131を発現させた細胞は、CD116またはCD131の全長またはその部分長をコードするcDNAを含む発現ベクターを、大腸菌、酵母、昆虫細胞または動物細胞などに導入することにより、得ることができる。また、CD116およびCD131の少なくとも一方を多量に発現している各種ヒト腫瘍培養細胞またはヒト組織などからCD116およびCD131の少なくとも一方を精製し、抗原として使用することができる。また、該腫瘍培養細胞または該組織などをそのまま抗原として用いることもできる。さらに、Fmoc法またはtBoc法などの化学合成法によりCD116またはCD131の部分配列を有する合成ペプチドを調製し、抗原に用いることもできる。
マウス、ラット、ハムスター、ウサギ、ウシ、またはアルパカなどの動物に、(1)で得られる抗原を免疫して、その動物の脾臓、リンパ節または末梢血中の抗体産生細胞を採取する。また、動物としては、例えば、富塚らの文献[Tomizuka. et al., Proc Natl Acad Sci USA., 97, 722(2000)]に記載されているヒト由来抗体を産生するトランスジェニックマウス、免疫原性を高めるためにCD116またはCD131のコンディショナルノックアウトマウスなどが被免疫動物として挙げられる。
ミエローマとしては、マウス、ラット、モルモット、ハムスター、ウサギまたはヒト等の哺乳動物に由来する自己抗体産生能のない細胞を用いることが出来るが、一般的にはマウスから得られた株化細胞、例えば、8-アザグアニン耐性マウス(BALB/c由来)ミエローマ細胞株P3-X63Ag8-U1(P3-U1)[Current Topics in Microbiology and Immunology, 18, 1(1978)]、P3-NS1/1-Ag41(NS-1)[European J. Immunology, 6, 511 (1976)]、SP2/0-Ag14(SP-2)[Nature, 276, 269(1978)]、P3-X63-Ag8653(653)[J. Immunology, 123, 1548 (1979)]、またはP3-X63-Ag8(X63)[Nature, 256, 495(1975)]などが用いられる。該細胞株は、適当な培地、例えば8-アザグアニン培地[グルタミン、2-メルカプトエタノール、ゲンタマイシン、FCSおよび8-アザグアニンを加えたRPMI-1640培地]、イスコフ改変ダルベッコ培地(Iscove’s Modified Dulbecco’s Medium;以下「IMDM」という)、またはダルベッコ改変イーグル培地(Dulbecco’s Modified Eagle Medium;以下「DMEM」という)などの培地で継代培養する。細胞融合の3~4日前に上記の細胞株を正常培地(例えば、10% FCSを含むDMEM培地)で継代培養し、融合を行う当日に2×107個以上の細胞数を確保する。
(2)で得られる融合用抗体産生細胞と(3)で得られるミエローマ細胞を、Minimum Essential Medium(MEM)培地またはPBS(リン酸二ナトリウム1.83g、リン酸一カリウム0.21g、食塩7.65g、蒸留水1リットル、pH7.2)でよく洗浄し、融合用抗体産生細胞:ミエローマ細胞=5:1~10:1になるように混合し、遠心分離した後、上清を除く。沈澱した細胞集塊をよくほぐした後、ポリエチレングリコール-1000(PEG-1000)、MEM培地およびジメチルスルホキシドの混合液を、37℃にて攪拌しながら加える。さらに1~2分間毎にMEM培地1~2mLを数回加えた後、MEM培地を加えて全量が50mLになるようにする。遠心分離後、上清を除き、沈澱した細胞集塊を緩やかにほぐした後、HAT培地[ヒポキサンチン、チミジンおよびアミノプテリンを加えた正常培地]中に緩やかに細胞を懸濁する。この懸濁液を5%CO2インキュベータ中、37℃にて7~14日間培養する。
融合に用いたミエローマ細胞が8-アザグアニン耐性株である場合、すなわちヒポキサンチン・グアニン・ホスホリボシルトランスフェラーゼ(HGPRT)欠損株である場合は、融合しなかったミエローマ細胞およびミエローマ細胞同士の融合細胞は、HAT培地中では生存することができない。一方、抗体産生細胞同士の融合細胞および抗体産生細胞とミエローマ細胞とのハイブリドーマは、HAT培地中で生存することができるが、抗体産生細胞同士の融合細胞はやがて寿命に達する。したがって、HAT培地中での培養を続けることによって、抗体産生細胞とミエローマ細胞とのハイブリドーマのみが生き残り、結果的にハイブリドーマを取得することができる。
プリスタン処理[2,6,10,14-テトラメチルペンタデカン(Pristane)0.5mLを腹腔内投与し、2週間飼育する]した8~10週令のマウスまたはヌードマウスに、(5)で得られるモノクローナル抗体産生ハイブリドーマを腹腔内に注射する。10~21日でハイブリドーマは腹水癌化する。このマウスから腹水を採取し、遠心分離して固形分を除去後、40~50%硫酸アンモニウムで塩析し、カプリル酸沈殿法、DEAE-セファロースカラム、プロテインAカラムまたはゲル濾過カラムによる精製を行い、IgGまたはIgM画分を集め、精製モノクローナル抗体とする。また、同系統のマウス(例えば、BALB/c)若しくはNu/Nuマウス、ラット、モルモット、ハムスターまたはウサギ等の腹腔内で該ハイブリドーマを増殖させることにより、CD116またはCD131に結合するモノクローナル抗体を大量に含む腹水を得ることができる。
CD116またはCD131に対するモノクローナル抗体の結合活性は、オクテルロニー(Ouchterlony)法、ELISA法、RIA法、フローサイトメトリー法(FCM)または表面プラズモン共鳴法(SPR)などのバインディングアッセイ系により測定することができる。
本発明において、抗体が認識し結合するエピトープの同定は以下のようにして行うことができる。
遺伝子組換え抗体の作製例として、P. J. Delves., ANTIBODY PRODUCTION ESSENTIAL TECHNIQUES., 1997 WILEY、P. Shepherd and C. Dean. Monoclonal Antibodies., 2000 OXFORD UNIVERSITY PRESSおよびJ. W. Goding., Monoclonal Antibodies: principles and practice., 1993 ACADEMIC PRESSなどに概説されているが、以下にキメラ抗体、ヒト化抗体およびヒト抗体の作製方法を示す。また、遺伝子組換えマウス、ラット、ハムスターおよびラビット抗体についても、同様の方法で作製することができる。
モノクローナル抗体のVHおよびVLをコードするcDNAの取得は、例えば以下のようにして行うことができる。
遺伝子組換え抗体発現ベクターは、動物細胞用発現ベクターにヒト抗体のCHおよびCLの少なくとも一方をコードするDNAをクローニングすることにより構築することができる。
(2)で得られる遺伝子組換え抗体発現ベクター内のヒト抗体のCHまたはCLをコードする遺伝子の各々の上流に、(1)で得られる非ヒト抗体のVHまたはVLをコードするcDNAを各々クローニングすることで、キメラ抗体発現ベクターを構築することができる。
ヒト化抗体のVHまたはVLをコードするcDNAは、以下のようにして作製することができる。まず、(1)で得られる非ヒト抗体のVHまたはVLのCDRのアミノ酸配列を移植するヒト抗体のVHまたはVLのフレームワーク領域(以下、FRと表記する)のアミノ酸配列をそれぞれ選択する。
ヒト化抗体は、非ヒト抗体のVHおよびVLのCDRのみをヒト抗体のVHおよびVLのFRに移植しただけでは、その抗原結合活性は元の非ヒト抗体に比べて低下する[BIO/TECHNOLOGY, 9, 266(1991)]。そのため、ヒト抗体のVHおよびVLのFRのアミノ酸配列のうち、直接抗原との結合に関与しているアミノ酸残基、CDRのアミノ酸残基と相互作用するアミノ酸残基、および抗体の立体構造を維持し間接的に抗原との結合に関与しているアミノ酸残基を同定し、それらのアミノ酸残基を元の非ヒト抗体のアミノ酸残基に置換することにより、低下したヒト化抗体の抗原結合活性を上昇させることができる。
(2)で得られる遺伝子組換え抗体発現ベクターのヒト抗体のCHまたはCLをコードするそれぞれの遺伝子の上流に、構築したヒト化抗体のVHまたはVLをコードするcDNAをそれぞれクローニングし、ヒト化抗体発現ベクターを構築することができる。
ヒト抗体を産生する動物を被免疫動物として用いて、モノクローナル抗体を産生するハイブリドーマを樹立した場合には、(1)において、ヒト抗体のVHおよびVLのアミノ酸配列およびcDNA配列を得ることができる。そこで、(2)で得られる遺伝子組換え抗体発現ベクターのヒト抗体のCHまたはCLをコードするそれぞれの遺伝子の上流に、(1)で得たヒト抗体のVHまたはVLをコードする遺伝子をそれぞれクローニングすることで、ヒト抗体発現ベクターを構築することができる。
(3)、(6)および(7)で得られる遺伝子組換え抗体発現ベクター、またはそれらを改変した発現ベクターを用いて遺伝子組換え抗体を一過性に発現させ、得られた多種類の遺伝子組換え抗体の抗原結合活性を効率的に評価することができる。
(3)、(6)および(7)で得られた遺伝子組換え抗体発現ベクターを適当な宿主細胞に導入することにより遺伝子組換え抗体を安定的に発現する形質転換株を得ることができる。
非天然型アミノ酸残基を導入した抗体または抗体断片は、国際公開第2017/030156号に記載の方法に従って取得することができる。
本発明のバイスペシフィック抗体は、例えば、CD131に結合する第1の抗原結合ドメインとCD116に結合する第2の抗原結合ドメインとをそれぞれ作製し、それらを連結させることによって作製できる。
第1の抗原結合ドメインが、抗体または抗体断片である場合、上記1.および2.に記載の方法で、抗体のCDRまたは可変領域のアミノ酸配列をコードするDNA配列を決定する。さらに、該CDRまたは可変領域を含む抗原結合ドメインを設計し、該抗原結合ドメインのアミノ酸配列をコードするDNA配列を設計する。それを、例えば2.(2)に記載の遺伝子組み換え抗体発現ベクターに組み込み、該抗原結合ドメインを発現させることによって作製することができる。
CD131に結合する抗原結合ドメインは、上記3-1.と同様の方法により、作製することができる。また、第1と第2の抗原結合ドメインを適当なアミノ酸配列で連結させて組換えタンパク質を発現させる場合も上述の方法で本発明のバイスペシフィック抗体を作製することができる。
上記3-1.および3-2.で作製したCD116およびCD131に結合する抗原結合ドメインを以下の方法で連結させて、バイスペシフィック抗体を作製する。
精製したバイスペシフィック抗体または該バイスペシフィック抗体断片の活性評価は、以下のように行うことができる。
本発明のバイスペシフィック抗体または該抗体断片は、GM-CSFが関与する疾患またはGM-CSFの中和抗体が関与する疾患の治療に用いることができる。例えば、メラノーマ、頭頸部がん、乳がん、消化器がん、膵癌、肝細胞がん、前立腺がん、結腸直腸がん、肺がん、腎細胞がん、卵巣がん、化学療法による白血球減少症、骨髄移植による白血球減少症、再生不良性貧血による白血球減少症、骨髄異形成症候群による白血球減少症、骨髄移植における骨髄機能回復、急性骨髄性白血病、慢性骨髄単球性白血病、敗血症、真菌症、HIV感染症、インフルエンザウィルス感染症、非結核性抗酸菌感染症、急性呼吸促迫症候群、肺胞蛋白症、クローン病、アルツハイマー病および各種感染症などが挙げられる。
本発明のバイスペシフィック抗体または該バイスペシフィック抗体断片を用いて、CD116およびCD131の少なくとも一方が発現した細胞を検出または測定することにより、GM-CSFが関与する疾患またはGM-CSFの中和抗体が関与する疾患を診断することができる。
(1)ヒト、サル、およびマウスCD131発現ベクターの作製
ヒトCD131遺伝子の塩基配列(Genbank Accession Number:M59941)、サルCD131遺伝子の塩基配列(Genbank Accession Number:XP_015312724_1)、およびマウスCD131遺伝子の塩基配列(Genbank Accession Number:M34397)から、ヒト、サル、およびマウスCD131全長のアミノ酸配列を取得し、哺乳類細胞での発現に最適なコドンに変換を行い、ヒト、サル、およびマウスCD131全長をコードする塩基配列を得た。
ヒトCD116遺伝子の塩基配列(Genbank Accession Number:X17648)、マウスCD116遺伝子の塩基配列(Genbank Accession Number:M85078)から、ヒト、マウスCD116全長のアミノ酸配列を取得した。サルCD116についてはカニクイザルtotal RNAよりクローニングし全長の塩基配列およびアミノ酸配列情報を得た。これらアミノ酸配列を哺乳類細胞での発現に最適なコドンに変換を行い、ヒト、サル、およびマウスCD116全長をコードする塩基配列を得た。
Expi293(商標)Expression System(Thermo Fisher社製)を用いて、(1)で作製したヒト、サルおよびマウスCD131可溶性抗原発現ベクター(ヒトFc融合体またはHisタグ融合体)、および(2)で作製したヒト、サルおよびマウスCD116可溶性抗原発現ベクター(ヒトFc融合体またはHisタグ融合体)、をExpi293F細胞に導入して培養し、一過性にタンパク質を発現させた。ベクター導入4~5日後に培養上清を回収し、孔径0.22μmのメンブランフィルター(MILLIPORE社製)で濾過した。
(1)動物への免疫と抗体産生細胞の調製
ヒト抗体産生マウス[Ishida & Lonberg, IBC‘s 11th Antibody Engineering, Abstract 2000;Ishida, I. et al., Cloning & Stem Cells 4, 91-102 (2002)、および石田 功(2002)実験医学20,6,846-851]に、免疫原として、ヒトCD131-Fc(R&D システムズ社製)または実施例1で作製したヒトCD131可溶性抗原(ヒトFc融合体)、ヒトCD116可溶性抗原(ヒトFc融合体)を20μg/匹または50μg/匹で計4~6回投与した。初回免疫時のみ、アジュバントとしてAlumゲル(0.25mg/匹または2mg/匹)および不活性化百日咳菌懸濁液(ナカライテスク社製)(1×109個/匹)を添加した。
8-アザグアニン耐性マウス骨髄腫細胞株p3-U1[P3X63Ag8U.1、ATCC:CRL-1597、European Journal of Immunology、6、511(1976)]をRPMI 1640培地(和光純薬社製)に10% FBS(Access Biologicals社製)、ゲンタマイシン(20μg/mL)を添加した培地で培養し、細胞融合時に必要な細胞数(3×107cells以上)となるまで拡大培養した。
抗ヒトCD131抗体産生ハイブリドーマのスクリーニングは、ELISAおよびFCMにより行った。ELISAによるスクリーニングは、実施例1-(3)で調製したヒトCD131可溶性抗原(Hisタグ体)、サルCD131可溶性抗原(Hisタグ体)、およびマウスCD131可溶性抗原(Hisタグ体)を固相化させた固相抗原ELISA系を用いた。
抗ヒトCD116抗体産生ハイブリドーマのスクリーニングは、ELISAおよびFCMにより行った。ELISAによるスクリーニングは、Tetra His Antibody(キアゲン社製、Cat#34670)を固相化させたプレートに、実施例1-(3)で調製したヒトCD116可溶性抗原(Hisタグ体)、サルCD116可溶性抗原(Hisタグ体)、およびマウスCD116可溶性抗原(Hisタグ体)をキャプチャーさせた間接固相抗原ELISA系を用いた。
ハイブリドーマのスクリーニングにより選択した陽性ウェルのハイブリドーマについて、セルソーター(SONY社製、SH800)を用いてHAT培地を分注した96ウェルプレートに播種し単クローン化を行った。
表2に、CD116抗体のクローン名、VHをコードする全塩基配列から推定されるアミノ酸配列、およびVHのCDR1~3(以下ではHCDR1~3と記載することもある)のアミノ酸配列、VLをコードする全塩基配列から推定されるアミノ酸配列、およびVLのCDR1~3(以下ではLCDR1~3と記載することもある)のアミノ酸配列、の配列番号を示す。
実施例2-(5)において得られた配列番号30で示されるアミノ酸配列を有するCD131抗体のL鎖を有するCD116抗体ファージライブラリーを下記の方法で作製した。実施例2-(1)において得られたリンパ節細胞または脾臓細胞からRNeasy Mini Plus kit(QIAGEN社製)を用いてRNAを抽出し、SMARTer RACE cDNA増幅キット(Clontech社製)にてcDNAを増幅させ、さらにPCRにてVH遺伝子断片を増幅させた。
実施例2-(6)で得られたCD116抗体ファージライブラリーを用いて、下記のファージディスプレイ法により、配列番号30で示されるアミノ酸配列を有するCD131抗体のL鎖を有する抗CD116モノクローナル抗体を取得した。
(1)CD131とCD116に結合するIgG型バイスペシフィック抗体の作製
実施例2において取得した抗CD131抗体の配列および抗CD116抗体の配列を有するIgG型バイスペシフィック抗体発現ベクターを作製した。IgG型バイスペシフィック抗体の構造は、論文Mabs, 7, 377(2015)、および論文Protein Engineering, Design & Selection, 29, 457,(2016)を参考とし、図2に記載するKobs-into-Holesを用いたヘテロH鎖を有するバイスペシフィック抗体であり、以下、IgG型CD131-CD116バイスペシフィック抗体と記載する。
上記で調製した25種類のCD131-CD116バイスペシフィック抗体について、以下の方法でアゴニスト活性を解析した。活性解析は、GM-CSFシグナルに依存して増殖活性を示すTF-1細胞株(ATCC,CRL-2003)を使用した。
(1)CD131とCD116に結合するバイスペシフィック抗体の作製
実施例2において取得した抗CD131抗体配列および抗CD116抗体配列を有する表4に示すバイスペシフィック抗体を作製した。
上記で調製したCD131-CD116バイスペシフィック抗体について、抗原結合活性をELISA(Enzyme-Linked Immuno Sorbent Assay)にて解析した。
上記で調製した7種類のCD131-CD116バイスペシフィック抗体(GM398、GM408、GM413、GM435、GM463、GM464、GM466、定常領域はいずれもIgG4PE R409Kを使用)について、実施例3-(2)と同様にアゴニスト活性を解析した。結果を図5に示す。
ヒト単球は、組換えヒトGM-CSFを添加して培養することによりin vitroでマクロファージに分化し、その過程で単球のマーカー分子であるCD14の発現が低下し、マクロファージのマーカー分子であるCD206の発現が上昇する。したがって、CD131-CD116バイスペシフィック抗体のヒト単球に対するアゴニスト活性を、単球からマクロファージへの分化に伴うCD206発現の変化を指標に評価した。加えて、
細胞の形態観察による評価を実施した。
(1)ヒトGM-CSF受容体、IL-3受容体、IL-5受容体発現ベクターの構築
GM-CSF受容体とIL-3受容体、IL-5受容体は、受容体の構成分子としてCD131を共通して有している。そこで、取得したCD131-CD116バイスペシフィック抗体のGM-CSF受容体への特異性を解析した。
〔2〕ヒトIL-3受容体発現ベクター:IL3RA(CD123,UniProt Entry.No.P26951)の細胞外ドメイン、CSF2RB(CD131,UniProt Entry.No.P32927)の細胞外ドメイン、Azami-Green配列をfurinタンパク質の認識配列を挟んで接続したアミノ酸配列(配列番号148)
〔3〕ヒトIL-5受容体発現ベクター:IL5RA(CD125,UniProt Entry.No.Q01344)の細胞外ドメイン、CSF2RB(CD131,UniProt Entry.No.P32927)の細胞外ドメイン、Azami-Green配列をfurinタンパク質の認識配列を挟んで接続したアミノ酸配列(配列番号149)
上記ベクターをNucleofector 2b(Lonza)とCell Line Nucleofector kit V(Lonza)を用いてBa/F3に遺伝子導入し、培養用培地[5ng/mL マウスIL-3(Miltenyi Biotec)、10% FBS(GIBCO)、10μg/mL Blasticidin(InvivoGen)、RPMI1640(nacalai tesque)]を用いて培養した。
選抜用培地を用いて培養したBa/F3-hGM-CSFR、Ba/F3-hIL-3R、Ba/F3-hIL-5Rを遠心管に回収し、1200rpmで3分間、遠心分離後、上清を吸引除去し、さらにDPBS(nacalai tesque)で4回洗浄した。アッセイ用培地[10% FBS(GIBCO)、50μg/mL Blasticidin(InvivoGen)、RPMI1640(nacalai tesque)]に5.0×104cells/mLに懸濁し、96-wellプレートに80μL/wellで播種した。
実施例5でアゴニスト活性を解析したCD131-CD116バイスペシフィック抗体3種について、GM-CSF中和抗体が存在する条件下におけるアゴニスト活性を解析した。GM-CSF中和抗体としては、文献[Protein Eng Des Sel., 28, 461 (2015)]でGM-CSF中和活性が報告されているヤギ抗ヒトGM-CSFポリクローナル抗体(R&D)を使用した。
(1)次世代シーケンシングシステムを用いた抗CD116モノクローナル抗体の取得
実施例2-(6)の濃縮されたファージをTG1に感染させることにより取得した大腸菌から調製したDNAを用いて、Ion S5(商標)システム(Thermo Fisher Scientific社製)で配列解析を行い、濃縮されている抗体のアミノ酸配列として配列番号190~199で示されるアミノ酸配列を選択した。
Abwiz Bio社にてファージディスプレイ法を用いて、GM408の抗CD116クローンVHのCDR1~3のアミノ酸配列を改変した抗CD116抗体のスクリーニングを行った。得られた抗体のアミノ酸配列情報を解析し、抗体のアミノ酸配列として配列番号200~209で示されるアミノ酸配列を選択した。
実施例7-(1)、(2)において取得した抗CD116抗体配列および抗CD131抗体配列を有するバイスペシフィック抗体発現ベクターを作製した。
バイスペシフィック抗体の構造は、図4の(A)に示すN末端型構造を有し、VH1は抗CD131抗体のVH(アミノ酸配列を配列番号29で示す)、CH1はヒトIgG4のCH1(アミノ酸配列を配列番号144で示す)、VH2は抗CD116抗体のVH、定常領域はヒトIgG4PE R409KにEUインデックスで表されるH435Fのアミノ酸残基置換を加えた(アミノ酸配列を配列番号155で示す)ヒト抗体の定常領域配列であるCD131-CD116バイスペシフィック抗体とした。軽鎖はGM408と同一の軽鎖を用いた。
実施例7-(2)で取得したクローンについて、CD116に対する親和性をBiacore T200システム(Cytiva社)を用い評価した。Running bufferはHBS-EP+ buffer(Cytiva)を用いた。Anti-human antibody capture kitおよびAmine Coupling Kit(Cytiva)を用い、Anti-human Fc抗体をCM5 Sensor chip(Cytiva)表面に固定化した。この際、コントロールフローセルにも各抗体の固定化を実施した。
結合活性が高いクローンを用いることにより、標的細胞に対するアゴニスト作用の特異性を高めることが期待できる。
上記で調製した20種類のCD131-CD116バイスペシフィック抗体(定常領域はいずれもIgG4PE R409K H435Fを使用)について、実施例3-(2)と同様の手法で2日間静置培養によりアゴニスト活性を解析した。結果を図11および12に示す。
実施例4に示した3種類のN末端型CD131-CD116バイスペシフィック抗体(GM408、GM463、GM466)について、図4の(A)に示すVH1とVH2を入れ替え、N末端型のCD116-CD131バイスペシフィック抗体を実施例4(1)と同様に作製した(GM408 inverse、GM463 inverse、GM466 inverse、定常領域はいずれもIgG4PE R409Kを使用)。これらのCD116-CD131バイスペシフィック抗体のアゴニスト活性を、実施例3(2)と同様に解析した。結果を図13に示す。
実施例4に示した3種類のN末端型CD131-CD116バイスペシフィック抗体(GM408、GM463、GM466)を基に、C末端型バイスペシフィック抗体を2種類作製した。図4の(B)に示す通り、VH1にCD131結合VH配列を有し、VH2にCD116結合VH配列を有するC末端型CD131-CD116バイスペシフィック抗体(Ct GM408、Ct GM463、Ct GM466、定常領域はいずれもIgG4PE R409Kを使用)および、VH1にCD116結合VH配列を有し、VH2にCD131結合VH配列を有するC末端型CD116-CD131バイスペシフィック抗体(Ct GM408 inverse、Ct GM463 inverse、Ct GM466 inverse、定常領域はいずれもIgG4PE R409Kを使用)を実施例3(2)と同様に作製し、アゴニスト活性を解析した。結果を図14の(A)および(B)に示す。
実施例4に示した3種類のN末端型CD131-CD116バイスペシフィック抗体(GM408、GM463、GM466)について、図2に示すIgG型CD131-CD116バイスペシフィック抗体として、実施例3(1)と同様に調製した。作製したIgG型CD131-CD116バイスペシフィック抗体について、実施例3(2)と同様にアゴニスト活性を解析した結果を図15に示す。解析の結果、これらのIgG型CD131-CD116バイスペシフィック抗体は、いずれもGM-CSF受容体アゴニスト活性を示すことが確認された。
実施例4に記載されたCD131-CD116バイスペシフィック抗体GM408について、抗CD131抗体と抗CD116抗体の価数を制御した改変体を作製し、GM-CSF受容体アゴニスト活性への影響を解析した。
実施例4に記載されたCD131-CD116バイスペシフィック抗体を構成する抗CD116抗体116-408、および抗CD131抗体131-B2について、それぞれの抗原であるヒトCD116、ヒトCD131におけるエピトープをIntegral Molecular社への委託により解析した。
抗体Fc領域とNeonatal Fc receptor(FcRn)の結合は、抗体の血中半減期維持(Nat. Rev. Immunol., 7, 715 (2007))、および肺胞から血中への抗体のトランスサイトーシス(Proc Natl Acad Sci U S A., 101, 9763 (2004))に重要だと示唆されている。ゆえに、本発明のバイスペシフィック抗体を経肺投与する場合において、CD131-CD116バイスペシフィック抗体とFcRnとの結合を消失させることで、肺胞中におけるCD131-CD116バイスペシフィック抗体の滞留性が向上し、持続的な治療効果が期待される。加えて、CD131-CD116バイスペシフィック抗体の血中半減期が短縮されることにより、肺から全身循環血に漏出したバイスペシフィック抗体による予期せぬ副作用リスクが低減することが期待される。
実施例13で作製したCD131-CD116バイスペシフィック抗体各変異体について、Protein Aへの結合活性を実施例13と同様にBiacore T100並びにT200を使用して実施した。
配列番号2:サルCD131の全長塩基配列
配列番号3:ヒトCD131細胞外領域の塩基配列
配列番号4:サルCD131細胞外領域の塩基配列
配列番号5:マウスCD131細胞外領域の塩基配列
配列番号6:ヒトCD116の全長塩基配列
配列番号7:サルCD116の全長塩基配列
配列番号8:ヒトCD116細胞外領域の塩基配列
配列番号9:サルCD116細胞外領域の塩基配列
配列番号10:マウスCD116細胞外領域の塩基配列
配列番号11:116-08 VHのアミノ酸配列
配列番号12:116-08 VLのアミノ酸配列
配列番号13:116-09 VHのアミノ酸配列
配列番号14:116-09 VLのアミノ酸配列
配列番号15:116-18 VHのアミノ酸配列
配列番号16:116-18 VLのアミノ酸配列
配列番号17:116-21 VHのアミノ酸配列
配列番号18:116-21 VLのアミノ酸配列
配列番号19:116-22 VHのアミノ酸配列
配列番号20:116-22 VLのアミノ酸配列
配列番号21:131-03 VHのアミノ酸配列
配列番号22:131-03 VLのアミノ酸配列
配列番号23:131-16 VHのアミノ酸配列
配列番号24:131-16 VLのアミノ酸配列
配列番号25:131-18 VHのアミノ酸配列
配列番号26:131-18 VLのアミノ酸配列
配列番号27:131-B1 VHのアミノ酸配列
配列番号28:131-B1 VLのアミノ酸配列
配列番号29:131-B2 VHのアミノ酸配列
配列番号30:131-B2 VLのアミノ酸配列
配列番号31:116-08 VH CDR1のアミノ酸配列
配列番号32:116-08 VH CDR2のアミノ酸配列
配列番号33:116-08 VH CDR3のアミノ酸配列
配列番号34:116-08 VL CDR1のアミノ酸配列
配列番号35:116-08 VL CDR2のアミノ酸配列
配列番号36:116-08 VL CDR3のアミノ酸配列
配列番号37:116-09 VH CDR1のアミノ酸配列
配列番号38:116-09 VH CDR2のアミノ酸配列
配列番号39:116-09 VH CDR3のアミノ酸配列
配列番号40:116-09 VL CDR1のアミノ酸配列
配列番号41:116-09 VL CDR2のアミノ酸配列
配列番号42:116-09 VL CDR3のアミノ酸配列
配列番号43:116-18 VH CDR1のアミノ酸配列
配列番号44:116-18 VH CDR2のアミノ酸配列
配列番号45:116-18 VH CDR3のアミノ酸配列
配列番号46:116-18 VL CDR1のアミノ酸配列
配列番号47:116-18 VL CDR2のアミノ酸配列
配列番号48:116-18 VL CDR3のアミノ酸配列
配列番号49:116-21 VH CDR1のアミノ酸配列
配列番号50:116-21 VH CDR2のアミノ酸配列
配列番号51:116-21 VH CDR3のアミノ酸配列
配列番号52:116-21 VL CDR1のアミノ酸配列
配列番号53:116-21 VL CDR2のアミノ酸配列
配列番号54:116-21 VL CDR3のアミノ酸配列
配列番号55:116-22 VH CDR1のアミノ酸配列
配列番号56:116-22 VH CDR2のアミノ酸配列
配列番号57:116-22 VH CDR3のアミノ酸配列
配列番号58:116-22 VL CDR1のアミノ酸配列
配列番号59:116-22 VL CDR2のアミノ酸配列
配列番号60:116-22 VL CDR3のアミノ酸配列
配列番号61:131-03 VH CDR1のアミノ酸配列
配列番号62:131-03 VH CDR2のアミノ酸配列
配列番号63:131-03 VH CDR3のアミノ酸配列
配列番号64:131-03 VL CDR1のアミノ酸配列
配列番号65:131-03 VL CDR2のアミノ酸配列
配列番号66:131-03 VL CDR3のアミノ酸配列
配列番号67:131-16 VH CDR1のアミノ酸配列
配列番号68:131-16 VH CDR2のアミノ酸配列
配列番号69:131-16 VH CDR3のアミノ酸配列
配列番号70:131-16 VL CDR1のアミノ酸配列
配列番号71:131-16 VL CDR2のアミノ酸配列
配列番号72:131-16 VL CDR3のアミノ酸配列
配列番号73:131-18 VH CDR1のアミノ酸配列
配列番号74:131-18 VH CDR2のアミノ酸配列
配列番号75:131-18 VH CDR3のアミノ酸配列
配列番号76:131-18 VL CDR1のアミノ酸配列
配列番号77:131-18 VL CDR2のアミノ酸配列
配列番号78:131-18 VL CDR3のアミノ酸配列
配列番号79:131-B1 VH CDR1のアミノ酸配列
配列番号80:131-B1 VH CDR2のアミノ酸配列
配列番号81:131-B1 VH CDR3のアミノ酸配列
配列番号82:131-B1 VL CDR1のアミノ酸配列
配列番号83:131-B1 VL CDR2のアミノ酸配列
配列番号84:131-B1 VL CDR3のアミノ酸配列
配列番号85:131-B2 VH CDR1のアミノ酸配列
配列番号86:131-B2 VH CDR2のアミノ酸配列
配列番号87:131-B2 VH CDR3のアミノ酸配列
配列番号88:131-B2 VL CDR1のアミノ酸配列
配列番号89:131-B2 VL CDR2のアミノ酸配列
配列番号90:131-B2 VL CDR3のアミノ酸配列
配列番号91:131-B2 VLのアミノ酸配列
配列番号92:116-398のアミノ酸配列
配列番号93:116-412のアミノ酸配列
配列番号94:116-413のアミノ酸配列
配列番号95:116-421のアミノ酸配列
配列番号96:116-433のアミノ酸配列
配列番号97:116-435のアミノ酸配列
配列番号98:116-439のアミノ酸配列
配列番号99:116-463のアミノ酸配列
配列番号100:116-464のアミノ酸配列
配列番号101:116-465のアミノ酸配列
配列番号102:116-466のアミノ酸配列
配列番号103:116-408のアミノ酸配列
配列番号104:116-398 VH CDR1のアミノ酸配列
配列番号105:116-398 VH CDR2のアミノ酸配列
配列番号106:116-398 VH CDR3のアミノ酸配列
配列番号107:116-412 VH CDR1のアミノ酸配列
配列番号108:116-412 VH CDR2のアミノ酸配列
配列番号109:116-412 VH CDR3のアミノ酸配列
配列番号110:116-413 VH CDR1のアミノ酸配列
配列番号111:116-413 VH CDR2のアミノ酸配列
配列番号112:116-413 VH CDR3のアミノ酸配列
配列番号113:116-421 VH CDR1のアミノ酸配列
配列番号114:116-421 VH CDR2のアミノ酸配列
配列番号115:116-421 VH CDR3のアミノ酸配列
配列番号116:116-433 VH CDR1のアミノ酸配列
配列番号117:116-433 VH CDR2のアミノ酸配列
配列番号118:116-433 VH CDR3のアミノ酸配列
配列番号119:116-435 VH CDR1のアミノ酸配列
配列番号120:116-435 VH CDR2のアミノ酸配列
配列番号121:116-435 VH CDR3のアミノ酸配列
配列番号122:116-439 VH CDR1のアミノ酸配列
配列番号123:116-439 VH CDR2のアミノ酸配列
配列番号124:116-439 VH CDR3のアミノ酸配列
配列番号125:116-463 VH CDR1のアミノ酸配列
配列番号126:116-463 VH CDR2のアミノ酸配列
配列番号127:116-463 VH CDR3のアミノ酸配列
配列番号128:116-464 VH CDR1のアミノ酸配列
配列番号129:116-464 VH CDR2のアミノ酸配列
配列番号130:116-464 VH CDR3のアミノ酸配列
配列番号131:116-465 VH CDR1のアミノ酸配列
配列番号132:116-465 VH CDR2のアミノ酸配列
配列番号133:116-465 VH CDR3のアミノ酸配列
配列番号134:116-466 VH CDR1のアミノ酸配列
配列番号135:116-466 VH CDR2のアミノ酸配列
配列番号136:116-466 VH CDR3のアミノ酸配列
配列番号137:116-408 VH CDR1のアミノ酸配列
配列番号138:116-408 VH CDR2のアミノ酸配列
配列番号139:116-408 VH CDR3のアミノ酸配列
配列番号140:DuetMAb LALAPG CH1~CH3定常領域1のアミノ酸配列
配列番号141:DuetMAb LALAPG CL定常領域1のアミノ酸配列
配列番号142:DuetMAb LALAPG CH1~CH3定常領域2のアミノ酸配列
配列番号143:DuetMAb LALAPG CL定常領域2のアミノ酸配列
配列番号144:IgG4CH1定常領域のアミノ酸配列
配列番号145:IgG4PE R409K CH1~CH3定常領域のアミノ酸配列
配列番号146:IgG1 LALAGA CH1~CH3定常領域のアミノ酸配列
配列番号147:IgG4PE R409K CH1~CH3定常領域I253A変異体のアミノ酸配列
配列番号148:IgG4PE R409K CH1~CH3定常領域I253H変異体のアミノ酸配列
配列番号149:IgG4PE R409K CH1~CH3定常領域I253D変異体のアミノ酸配列
配列番号150:IgG4PE R409K CH1~CH3定常領域I253S変異体のアミノ酸配列
配列番号151:IgG4PE R409K CH1~CH3定常領域H310D変異体のアミノ酸配列
配列番号152:IgG4PE R409K CH1~CH3定常領域H310G変異体のアミノ酸配列
配列番号153:IgG4PE R409K CH1~CH3定常領域H435A変異体のアミノ酸配列
配列番号154:IgG4PE R409K CH1~CH3定常領域H435E変異体のアミノ酸配列
配列番号155:IgG4PE R409K CH1~CH3定常領域H435F変異体のアミノ酸配列
配列番号156:IgG4PE R409K CH1~CH3定常領域H435T変異体のアミノ酸配列
配列番号157:IgG4PE R409K CH1~CH3定常領域Y436A変異体のアミノ酸配列
配列番号158:IgG4PE R409K CH1~CH3定常領域Y436E変異体のアミノ酸配列
配列番号159:IgG4PE R409K CH1~CH3定常領域Y436G変異体のアミノ酸配列
配列番号160:IgG1 LALAGA CH1~CH3定常領域I253A変異体のアミノ酸配列
配列番号161:IgG1 LALAGA CH1~CH3定常領域I253H変異体のアミノ酸配列
配列番号162:IgG1 LALAGA CH1~CH3定常領域I253D変異体のアミノ酸配列
配列番号163:IgG1 LALAGA CH1~CH3定常領域I253S変異体のアミノ酸配列
配列番号164:IgG1 LALAGA CH1~CH3定常領域H310D変異体のアミノ酸配列
配列番号165:IgG1 LALAGA CH1~CH3定常領域H310G変異体のアミノ酸配列
配列番号166:IgG1 LALAGA CH1~CH3定常領域H435A変異体のアミノ酸配列
配列番号167:IgG1 LALAGA CH1~CH3定常領域H435E変異体のアミノ酸配列
配列番号168:IgG1 LALAGA CH1~CH3定常領域H435F変異体のアミノ酸配列
配列番号169:IgG1 LALAGA CH1~CH3定常領域H435T変異体のアミノ酸配列
配列番号170:IgG1 LALAGA CH1~CH3定常領域Y436A変異体のアミノ酸配列
配列番号171:IgG1 LALAGA CH1~CH3定常領域Y436E変異体のアミノ酸配列
配列番号172:IgG1 LALAGA CH1~CH3定常領域Y436G変異体のアミノ酸配列
配列番号173:131-B2 VHの塩基配列
配列番号174:IgG4CH1定常領域の塩基配列
配列番号175:GM398 116 VHのアミノ酸配列
配列番号176:GM412 116 VH FR1をバイスペシフィック抗体に最適化したアミノ酸配列
配列番号177:GM413 116 VH FR1をバイスペシフィック抗体に最適化したアミノ酸配列
配列番号178:GM421 116 VH FR1をバイスペシフィック抗体に最適化したアミノ酸配列
配列番号179:GM433 116 VH FR1をバイスペシフィック抗体に最適化したアミノ酸配列
配列番号180:GM435 116 VHのアミノ酸配列
配列番号181:GM439 116 VHのアミノ酸配列
配列番号182:GM463 116 VH FR1をバイスペシフィック抗体に最適化したアミノ酸配列
配列番号183:GM464 116 VH FR1をバイスペシフィック抗体に最適化したアミノ酸配列
配列番号184:GM465 116 VH FR1をバイスペシフィック抗体に最適化
配列番号185:GM466 116 VH FR1をバイスペシフィック抗体に最適化
配列番号186:GM408 116 VHのアミノ酸配列
配列番号187:human GM-CSF受容体発現ベクターのアミノ酸配列
配列番号188:human IL-3受容体発現ベクターのアミノ酸配列
配列番号189:human IL-5受容体発現ベクターのアミノ酸配列
配列番号190:GM408ngs007 VHのアミノ酸配列
配列番号191:GM408ngs058 VHのアミノ酸配列
配列番号192:GM408ngs365 VHのアミノ酸配列
配列番号193:GM408ngs127 VHのアミノ酸配列
配列番号194:GM408ngs008 VHのアミノ酸配列
配列番号195:GM408ngs300 VHのアミノ酸配列
配列番号196:GM408ngs041 VHのアミノ酸配列
配列番号197:GM408ngs048 VHのアミノ酸配列
配列番号198:GM408ngs047 VHのアミノ酸配列
配列番号199:GM408ngs539 VHのアミノ酸配列
配列番号200:GM408_H101 VHのアミノ酸配列
配列番号201:GM408_H102 VHのアミノ酸配列
配列番号202:GM408_H103 VHのアミノ酸配列
配列番号203:GM408_H104 VHのアミノ酸配列
配列番号204:GM408_H105 VHのアミノ酸配列
配列番号205:GM408_H301 VHのアミノ酸配列
配列番号206:GM408_H302 VHのアミノ酸配列
配列番号207:GM408_H303 VHのアミノ酸配列
配列番号208:GM408_H106 VHのアミノ酸配列
配列番号209:GM408_H107 VHのアミノ酸配列
配列番号210:human_CD116ECD(23-320)のアミノ酸配列
配列番号211:human_CD131ECD(17-443)のアミノ酸配列
Claims (22)
- 第1の抗原結合ドメインおよび第2の抗原結合ドメインを含み、
前記第1の抗原結合ドメインおよび前記第2の抗原結合ドメインのいずれか一方がCD116に結合する抗原結合ドメインであり、もう一方がCD131に結合する抗原結合ドメインである、バイスペシフィック抗体または該バイスペシフィック抗体断片。 - Granulocyte macrophage-colonystimulating factor(以下、GM-CSFと略記する)受容体に対してアゴニスト活性を有する、請求項1に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。
- 前記第1の抗原結合ドメインおよび前記第2の抗原結合ドメインが、それぞれ重鎖可変領域(以下、VHと略記する)および軽鎖可変領域(以下、VLと略記する)を含む、請求項1又は2に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。
- CD116およびCD131に1価または2価でそれぞれ結合する、請求項1~3のいずれか1項に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。
- 前記CD131に結合する抗原結合ドメインが、下記(1a)~(1e)から選ばれるいずれか1である、請求項1~4のいずれか1項に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。
(1a)それぞれ配列番号61~63で表されるアミノ酸配列を含む相補性決定領域(以下、CDRと略記する)1~3を含むVH、および、それぞれ配列番号64~66で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(1b)それぞれ配列番号67~69で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号70~72で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(1c)それぞれ配列番号73~75で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号76~78で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(1d)それぞれ配列番号79~81で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号82~84で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(1e)それぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む - 前記CD131に結合する抗原結合ドメインが、下記(1A)~(1E)から選ばれるいずれか1である、請求項1~5のいずれか1項に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。
(1A)配列番号21で表されるアミノ酸配列を含むVH、および、配列番号22で表されるアミノ酸配列を含むVLを含む
(1B)配列番号23で表されるアミノ酸配列を含むVH、および、配列番号24で表されるアミノ酸配列を含むVLを含む
(1C)配列番号25で表されるアミノ酸配列を含むVH、および、配列番号26で表されるアミノ酸配列を含むVLを含む
(1D)配列番号27で表されるアミノ酸配列を含むVH、および、配列番号28で表されるアミノ酸配列を含むVLを含む
(1E)配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む - 前記CD116に結合する抗原結合ドメインが、下記(2a)~(2q)および(2r-1)~(2r-12)から選ばれるいずれか1である、請求項1~6のいずれか1項に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。
(2a)それぞれ配列番号31~33で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号34~36で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2b)それぞれ配列番号37~39で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号40~42で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2c)それぞれ配列番号43~45で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号46~48で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2d)それぞれ配列番号49~51で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号52~54で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2e)それぞれ配列番号55~57で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号58~60で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2f)それぞれ配列番号104~106で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2g)それぞれ配列番号107~109で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2h)それぞれ配列番号110~112で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2i)それぞれ配列番号113~115で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2j)それぞれ配列番号116~118で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2k)それぞれ配列番号119~121で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2l)それぞれ配列番号122~124で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2m)それぞれ配列番号125~127で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2n)それぞれ配列番号128~130で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2о)それぞれ配列番号131~133で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2p)それぞれ配列番号134~136で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2q)それぞれ配列番号137~139で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-1)配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列中の9番目のアルギニンをリジンに置換する改変が導入されたアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-2)配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列中の17番目のグリシンをアスパラギン酸に置換する改変が導入されたアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-3)配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列中の9番目のアルギニンをスレオニンに置換する改変が導入されたアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-4)配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列中の2番目のフェニルアラニンをロイシンに、9番目のアルギニンをスレオニンに置換する改変が導入されたアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-5)配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列中の2番目のフェニルアラニンをセリンに、9番目のアルギニンをスレオニンに置換する改変が導入されたアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-6)配列番号137で表されるアミノ酸配列の2番目のロイシンをバリンに、3番目のセリンをアラニンに、4番目のメチオニンをロイシンに置換する改変が導入されたアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-7)配列番号137で表されるアミノ酸配列の2番目のロイシンをフェニルアラニンに、3番目のセリンをアラニンに置換する改変が導入されたアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-8)配列番号137で表されるアミノ酸配列の3番目のセリンをアラニンに、4番目のメチオニンをロイシンに置換する改変が導入されたアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-9)配列番号137で表されるアミノ酸配列の2番目のロイシンをチロシンに、3番目のセリンをアラニンに置換する改変が導入されたアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-10)配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列の2番目のロイシンをグルタミン酸に置換する改変が導入されたアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-11)配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列の2番目のロイシンをグルタミン酸に、5番目のチロシンをトリプトファンに、6番目のチロシンをメチオニンに置換する改変が導入されたアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む
(2r-12)配列番号137で表されるアミノ酸配列の2番目のロイシンをフェニルアラニンに、3番目のセリンをアラニンに、4番目のメチオニンをロイシンに置換する改変が導入されたアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む - 前記CD116に結合する抗原結合ドメインが、下記(2A)~(2Y)および(2Z-1)~(2Z-20)から選ばれるいずれか1である、請求項1~7のいずれか1項に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。
(2A)配列番号11で表されるアミノ酸配列を含むVH、および、配列番号12で表されるアミノ酸配列を含むVLを含む
(2B)配列番号13で表されるアミノ酸配列を含むVH、および、配列番号14で表されるアミノ酸配列を含むVLを含む
(2C)配列番号15で表されるアミノ酸配列を含むVH、および、配列番号16で表されるアミノ酸配列を含むVLを含む
(2D)配列番号17で表されるアミノ酸配列を含むVH、および、配列番号18で表されるアミノ酸配列を含むVLを含む
(2E)配列番号19で表されるアミノ酸配列を含むVH、および、配列番号20で表されるアミノ酸配列を含むVLを含む
(2F)配列番号92で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2G)配列番号93で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2H)配列番号94で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2I)配列番号95で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2J)配列番号96で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2K)配列番号97で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2L)配列番号98で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2M)配列番号99で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2N)配列番号100で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2O)配列番号101で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2P)配列番号102で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Q)配列番号103で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2R)配列番号176で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2S)配列番号177で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2T)配列番号178で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2U)配列番号179で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2V)配列番号182で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2W)配列番号183で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2X)配列番号184で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Y)配列番号185で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-1)配列番号190で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-2)配列番号191で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-3)配列番号192で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-4)配列番号193で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-5)配列番号194で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-6)配列番号195で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-7)配列番号196で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-8)配列番号197で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-9)配列番号198で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-10)配列番号199で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-11)配列番号200で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-12)配列番号201で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-13)配列番号202で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-14)配列番号203で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-15)配列番号204で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-16)配列番号205で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-17)配列番号206で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-18)配列番号207で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-19)配列番号208で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む
(2Z-20)配列番号209で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む - 前記第1の抗原結合ドメインがCD131に結合する抗原結合ドメインであり、前記第2の抗原結合ドメインがCD116に結合する抗原結合ドメインである、請求項1~8のいずれか1項に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。
- 前記第1の抗原結合ドメインおよび前記第2の抗原結合ドメインがそれぞれFab(以下、第1のFab、第2のFabとそれぞれ略記する)であり、
前記第1のFabは、VHおよびCH1ドメインを含む重鎖(VH1-CH1)と、軽鎖(VL-CL)とを含み、
前記第2のFabは、VHおよびCH1ドメインを含む重鎖(VH2-CH1’)と、軽鎖(VL-CL)とを含む、
請求項1~9のいずれか1項に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。 - 前記第1のFabおよび前記第2のFabをそれぞれ1つ、並びにヒンジ領域を含み、
前記第1のFabにおける前記重鎖のC末端と、前記第2のFabにおける前記重鎖のC末端とが、前記ヒンジ領域のN末端にそれぞれ結合している、請求項10に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。 - 下記第1のポリペプチド、下記第2のポリペプチド、およびヒンジ領域を含み、前記第1のポリペプチドのC末端と前記第2のポリペプチドのC末端とが前記ヒンジ領域のN末端にそれぞれ結合している、請求項10に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。
第1のポリペプチド:前記第1のFab(VH1-CH1、VL-CL)をN末端に少なくとも含む、ポリペプチド。
第2のポリペプチド:前記第2のFab(VH2-CH1’、VL-CL)をC末端に少なくとも含む、ポリペプチド。 - 前記第1のFabにおける前記重鎖のC末端と、前記第2のFabにおける前記重鎖のN末端とが直接またはリンカーを介して結合しているポリペプチド鎖(VH1-CH1-VH2-CH1’)を2本、およびヒンジ領域を含み、
2本の前記ポリペプチド鎖のC末端が前記ヒンジ領域のN末端にそれぞれ結合している、請求項10に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。 - さらにFc領域を含み、前記ヒンジ領域のC末端に前記Fc領域のN末端が結合している、請求項11~13のいずれか1項に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。
- 前記バイスペシフィック抗体が下記(x1)~(x12)および(x13-1)~(x13-12)から選ばれるいずれか1である、請求項1~14のいずれか1項に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。
(x1)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインがそれぞれ配列番号104~106で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x2)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインがそれぞれ配列番号107~109で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x3)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインがそれぞれ配列番号110~112で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x4)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインがそれぞれ配列番号113~115で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x5)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインがそれぞれ配列番号116~118で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x6)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインがそれぞれ配列番号119~121で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x7)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインがそれぞれ配列番号122~124で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x8)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインがそれぞれ配列番号125~127で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x9)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインがそれぞれ配列番号128~130で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x10)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインがそれぞれ配列番号131~133で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x11)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインがそれぞれ配列番号134~136で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x12)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインがそれぞれ配列番号137~139で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x13-1)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列中の9番目のアルギニンをリジンに置換する改変が導入されたアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x13-2)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列中の17番目のグリシンをアスパラギン酸に置換する改変が導入されたアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x13-3)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列中の9番目のアルギニンをスレオニンに置換する改変が導入されたアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(X13-4)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列中の2番目のフェニルアラニンをロイシンに、9番目のアルギニンをスレオニンに置換する改変が導入されたアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x13-5)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列中の2番目のフェニルアラニンをセリンに、9番目のアルギニンをスレオニンに置換する改変が導入されたアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x13-6)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号137で表されるアミノ酸配列の2番目のロイシンをバリンに、3番目のセリンをアラニンに、4番目のメチオニンをロイシンに置換する改変が導入されたアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x13-7)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号137で表されるアミノ酸配列の2番目のロイシンをフェニルアラニンに、3番目のセリンをアラニンに置換する改変が導入されたアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x13-8)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号137で表されるアミノ酸配列の3番目のセリンをアラニンに、4番目のメチオニンをロイシンに置換する改変が導入されたアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x13-9)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号137で表されるアミノ酸配列の2番目のロイシンをチロシンに、3番目のセリンをアラニンに置換する改変が導入されたアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x13-10)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列の2番目のロイシンをグルタミン酸に置換する改変が導入されたアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x13-11)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号137で表されるアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列の2番目のロイシンをグルタミン酸に、5番目のチロシンをトリプトファンに、6番目のチロシンをメチオニンに置換する改変が導入されたアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体
(x13-12)前記第1の抗原結合ドメインがそれぞれ配列番号85~87で表されるアミノ酸配列を含むCDR1~3を含むVH、および、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号137で表されるアミノ酸配列の2番目のロイシンをフェニルアラニンに、3番目のセリンをアラニンに、4番目のメチオニンをロイシンに置換する改変が導入されたアミノ酸配列を含むCDR1、配列番号138で表されるアミノ酸配列を含むCDR2および配列番号139で表されるアミノ酸配列を含むCDR3を含むVH、並びに、それぞれ配列番号88~90で表されるアミノ酸配列を含むCDR1~3を含むVLを含む、バイスペシフィック抗体 - 前記バイスペシフィック抗体が下記(y1)~(y12)および(y13-1)~(y13-20)から選ばれるいずれか1である、請求項1~15のいずれか1項に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。
(y1)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号175で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y2)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号176で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y3)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号177で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y4)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号178で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y5)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号179で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y6)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号180で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y7)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号181で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y8)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号182で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y9)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号183で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y10)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号184で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y11)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号185で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y12)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号186で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-1)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号190で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-2)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号191で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-3)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号192で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-4)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号193で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-5)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号194で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-6)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号195で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-7)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号196で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-8)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号197で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-9)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号198で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-10)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号199で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-11)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号200で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-12)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号201で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-13)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号202で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-14)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号203で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-15)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号204で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-16)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号205で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-17)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号206で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-18)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号207で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-19)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号208で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体
(y13-20)前記第1の抗原結合ドメインが配列番号29で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含み、且つ前記第2の抗原結合ドメインが配列番号209で表されるアミノ酸配列を含むVH、および、配列番号30で表されるアミノ酸配列を含むVLを含む、バイスペシフィック抗体 - 前記ポリペプチド鎖が前記第1のFabにおける前記重鎖(VH1-CH1)のC末端と、前記第2のFabにおける前記重鎖(VH2-CH1’)のN末端とが直接またはリンカーを介して結合しているポリペプチド鎖(VH1-CH1-VH2-CH1’)であり、前記ポリペプチド鎖における(VH1-CH1-VH2)が下記(v1)~(v12)および(v13-1)~(v13-20)から選ばれるいずれか1である、請求項13または14に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。
(v1)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号175で表されるアミノ酸配列を含むVH2を含む
(v2)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号176で表されるアミノ酸配列を含むVH2を含む
(v3)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号177で表されるアミノ酸配列を含むVH2を含む
(v4)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号178で表されるアミノ酸配列を含むVH2を含む
(v5)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号179で表されるアミノ酸配列を含むVH2を含む
(v6)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号180で表されるアミノ酸配列を含むVH2を含む
(v7)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号181で表されるアミノ酸配列を含むVH2を含む
(v8)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号182で表されるアミノ酸配列を含むVH2を含む
(v9)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号183で表されるアミノ酸配列を含むVH2を含む
(v10)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号184で表されるアミノ酸配列を含むVH2を含む
(v11)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号185で表されるアミノ酸配列を含むVH2を含む
(v12)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号186で表されるアミノ酸配列を含むVH2を含む
(v13-1)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号190で表されるアミノ酸配列を含むVH2を含む
(v13-2)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号191で表されるアミノ酸配列を含むVH2を含む
(v13-3)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号192で表されるアミノ酸配列を含むVH2を含む
(v13-4)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号193で表されるアミノ酸配列を含むVH2を含む
(v13-5)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号194で表されるアミノ酸配列を含むVH2を含む
(v13-6)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号195で表されるアミノ酸配列を含むVH2を含む
(v13-7)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号196で表されるアミノ酸配列を含むVH2を含む
(v13-8)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号197で表されるアミノ酸配列を含むVH2を含む
(v13-9)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号198で表されるアミノ酸配列を含むVH2を含む
(v13-10)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号199で表されるアミノ酸配列を含むVH2を含む
(v13-11)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号200で表されるアミノ酸配列を含むVH2を含む
(v13-12)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号201で表されるアミノ酸配列を含むVH2を含む
(v13-13)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号202で表されるアミノ酸配列を含むVH2を含む
(v13-14)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号203で表されるアミノ酸配列を含むVH2を含む
(v13-15)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号204で表されるアミノ酸配列を含むVH2を含む
(v13-16)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号205で表されるアミノ酸配列を含むVH2を含む
(v13-17)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号206で表されるアミノ酸配列を含むVH2を含む
(v13-18)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号207で表されるアミノ酸配列を含むVH2を含む
(v13-19)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号208で表されるアミノ酸配列を含むVH2を含む
(v13-20)N末端から順に、配列番号29で表されるアミノ酸配列を含むVH1、配列番号144で表されるアミノ酸配列を含むCH1、配列番号209で表されるアミノ酸配列を含むVH2を含む - 前記第1のFabにおける前記重鎖(VH1-CH1)のC末端と、前記第2のFabにおける前記重鎖(VH2-CH1’)のN末端とが直接またはリンカーを介して結合している前記ポリペプチド鎖、該ポリペプチド鎖のC末端にN末端が結合しているヒンジ領域、該ヒンジ領域のC末端にN末端が結合しているFc領域(CH2-CH3)を含む重鎖2本と、軽鎖(VL-CL)4本とを含み、
前記CH1’および前記Fc領域(CH2-CH3)が配列番号145~172のいずれか1で表されるアミノ酸配列を含み、
前記軽鎖が配列番号30で表されるアミノ酸配列を含むVLを含む、請求項17に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片。 - 請求項1~18のいずれか1項に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片をコードするDNA。
- 請求項19に記載のDNAを含有する組換え体ベクター。
- 請求項20に記載の組換え体ベクターを宿主細胞に導入して得られる形質転換株。
- 請求項1~18のいずれか1項に記載のバイスペシフィック抗体または該バイスペシフィック抗体断片を有効成分として含有する、GM-CSFが関与する疾患の治療および/または診断薬。
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AU2022332728A AU2022332728A1 (en) | 2021-08-26 | 2022-08-26 | Bispecific antibody that binds to cd116 and cd131 |
CA3229748A CA3229748A1 (en) | 2021-08-26 | 2022-08-26 | Bispecific antibody that binds to cd116 and cd131 |
JP2023544004A JPWO2023027177A1 (ja) | 2021-08-26 | 2022-08-26 | |
EP22861465.7A EP4393952A1 (en) | 2021-08-26 | 2022-08-26 | Bispecific antibody that binds to cd116 and cd131 |
MX2024002349A MX2024002349A (es) | 2021-08-26 | 2022-08-26 | Anticuerpo biespecifico que se une a cd116 y cd131. |
KR1020247006195A KR20240049285A (ko) | 2021-08-26 | 2022-08-26 | Cd116 및 cd131에 결합하는 이중 특이적 항체 |
CN202280057635.8A CN117836326A (zh) | 2021-08-26 | 2022-08-26 | 与cd116和cd131结合的双特异性抗体 |
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