WO2022149837A1 - 항-fgfr3 항체 및 이의 용도 - Google Patents
항-fgfr3 항체 및 이의 용도 Download PDFInfo
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- WO2022149837A1 WO2022149837A1 PCT/KR2022/000119 KR2022000119W WO2022149837A1 WO 2022149837 A1 WO2022149837 A1 WO 2022149837A1 KR 2022000119 W KR2022000119 W KR 2022000119W WO 2022149837 A1 WO2022149837 A1 WO 2022149837A1
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- antibody
- seq
- antigen
- fgfr3
- heavy chain
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Definitions
- the present invention provides an anti-FGFR3 (Fibroblast growth factor receptor 3) antibody or antigen-binding fragment thereof, a nucleic acid encoding the same, a recombinant expression vector containing the nucleic acid, a host cell transfected with the recombinant expression vector, the antibody or antigen-binding thereof
- a chimeric antigen receptor (CAR) comprising an antigen-binding site of an external domain, an immune cell into
- Fibroblast growth factor and its tyrosine kinase receptor (FGFR) play important roles in embryonic development, maintenance of homeostasis in various tissues, wound healing processes and metabolic functions.
- FGF Fibroblast growth factor
- FGFR tyrosine kinase receptor
- Dysregulation of signaling by FGFR1-4 is associated with the etiology of several types of cancer.
- Genomic FGFR mutations including gene amplification, chromosomal translocation and activating mutations induce abnormal activation of the FGF pathway and promote tumor transformation of normal cells.
- the amplification of FGFR3 is known to be associated with bladder cancer induction.
- missense FGFR mutations are observed in several types of cancer, and FGF driving signaling and tumor cell proliferation can be enhanced by S249C of FGFR3, and represent a hot spot for somatic mutation.
- fusion proteins caused by rearrangement of chromosomes as cancer-causing mutations have been found in glioblastoma, lung cancer, bladder cancer, oral cancer, head and neck squamous cell cancer, gallbladder cancer or cervical cancer.
- Such a fusion protein is generated through fusion of the FGFR3 gene and the transforming acidic coiled-coil containing protein 3 (TAC3) gene by tandem duplication of chromosome 4.
- TAC3 transforming acidic coiled-coil containing protein 3
- TACC3 belongs to the TACC family, and the phenomenon of rearrangement in chromosome 4p16 corresponding to TACC3 and FGFR3 containing region is often found in multiple myelopathy, and this rearrangement leads to increased expression of FGFR3 or TACC3 (KN Nelson et al. ., Oncotarget. 2018 Sep 28; 9(76): 34306-34319).
- B701 (Vofatamab) is a human immunoglobulin G1 monoclonal antibody against FGFR3, and clinical trials have been conducted to confirm whether it exhibits anti-tumor activity and the possibility of combination with docetaxel.
- the anti-FGFR3 monoclonal antibody B-701 When the anti-FGFR3 monoclonal antibody B-701 is administered, it specifically binds and inhibits both wild-type and mutant FGFR3 to inhibit FGFR3 phosphorylation, thereby inhibiting FGFR3 activation and FGFR3-mediated signaling pathways. This inhibits cell proliferation and induces apoptosis in FGFR3-expressing tumors.
- LY3076226 is an antibody-drug conjugate (ADC) in which an anti-FGFR3 antibody is conjugated to a microtubule inhibitor (DM4), and clinical trials have been conducted to determine whether it can be used for advanced or metastatic cancer.
- a phase 1 clinical trial is underway to determine whether LY3076226 is effective in multiple myeloma with FGFR3 overexpression or modification and advanced or metastatic cancer including lymphoma, locally advanced, unresectable or metastatic urinary tract carcinoma (T Wheat et al., Bladder Cancer, vol. 5, no. 2, pp. 87-102, 2019).
- An object of the present invention is to select an antibody having a more sensitive reactivity to FGFR3-TACC3-overexpressing brain tumor patient-derived cells than a known anti-FGFR3 antibody.
- Another object of the present invention is to provide a nucleic acid encoding the antibody or antigen-binding fragment thereof.
- Another object of the present invention is to provide a recombinant expression vector containing the nucleic acid or a host cell transfected with the recombinant expression vector.
- Another object of the present invention is to provide a method for producing an antibody or antigen-binding fragment thereof that specifically binds to FGFR3.
- Another object of the present invention is to provide a bispecific or multispecific antibody comprising the antibody or antigen-binding fragment thereof.
- Another object of the present invention is to provide an immune cell engaging bispecific or multispecific antibody comprising the antibody or antigen-binding fragment thereof.
- Another object of the present invention is to provide an antibody-drug conjugate (ADC) in which the antibody or antigen-binding fragment thereof is bound to a drug.
- ADC antibody-drug conjugate
- Another object of the present invention is a chimeric antigen receptor (CAR) comprising the scFv of the anti-FGFR3 antibody as an antigen-binding site of an extracellular domain, an immune cell into which the chimeric antigen receptor is introduced, and a combination therapy comprising the immune cell
- CAR chimeric antigen receptor
- Another object of the present invention is to provide a composition for combination therapy comprising the antibody or antigen-binding fragment thereof or the immune cell engaging bispecific or multispecific antibody.
- Another object of the present invention is an antibody or antigen-binding fragment thereof, a bi- or multispecific antibody comprising the antibody or antigen-binding fragment thereof, an antibody-drug conjugate comprising the antibody or antigen-binding fragment thereof, the antibody or antigen thereof
- a chimeric antigen receptor comprising a binding fragment
- a composition for treating cancer comprising the chimeric antigen receptor, or a method for treating cancer.
- Another object of the present invention is to provide an endoplasmic reticulum comprising the antibody or antigen-binding fragment thereof.
- the present invention provides an antibody or antigen-binding fragment thereof that specifically binds to FGFR3 (Fibroblast growth factor receptor 3) comprising:
- Heavy chain CDR1 comprising at least one amino acid sequence selected from the group consisting of SEQ ID NO: 1 to SEQ ID NO: 18;
- heavy chain CDR2 comprising at least one amino acid sequence selected from the group consisting of SEQ ID NO: 19 to SEQ ID NO: 41;
- Heavy chain CDR3 comprising at least one amino acid sequence selected from the group consisting of SEQ ID NO: 42 to SEQ ID NO: 66, SEQ ID NO: 186 to 198;
- a light chain CDR1 comprising at least one amino acid sequence selected from the group consisting of SEQ ID NO: 67 to SEQ ID NO: 88;
- a light chain CDR2 comprising at least one amino acid sequence selected from the group consisting of SEQ ID NO: 89 to SEQ ID NO: 109;
- a light chain CDR3 comprising at least one amino acid sequence selected from the group consisting of SEQ ID NO: 110 to SEQ ID NO: 132, SEQ ID NO: 199 to SEQ ID NO: 202.
- the present invention provides a nucleic acid encoding the antibody or antigen-binding fragment thereof.
- the present invention also provides a recombinant expression vector comprising the nucleic acid.
- the present invention also provides a host cell transfected with the recombinant expression vector.
- the present invention also comprises the steps of culturing a host cell to produce an antibody; And it provides a method for producing an antibody or antigen-binding fragment thereof that specifically binds to FGFR3, comprising the step of isolating and purifying the generated antibody.
- the present invention also provides a bispecific or multispecific antibody comprising the antibody or antigen-binding fragment thereof.
- the present invention also relates to an immune cell engage bispecific or multispecific scFv comprising an scFv of said antibody and a second binding domain comprising at least one scFv of an antibody that binds to an immune cell activating antigen.
- Specific antibodies are provided.
- the present invention also provides an antibody-drug conjugate (ADC) wherein the antibody or antigen-binding fragment thereof is bound to a drug.
- ADC antibody-drug conjugate
- the present invention also provides a chimeric antigen receptor (CAR) comprising an extracellular domain comprising an antigen-binding site, a transmembrane domain and an intracellular signaling domain, wherein the antigen-binding site of the extracellular domain is an scFv of the antibody. It provides a chimeric antigen receptor characterized.
- CAR chimeric antigen receptor
- the present invention also provides an immune cell comprising the chimeric antigen receptor (CAR).
- CAR chimeric antigen receptor
- the present invention also provides a composition for combination therapy comprising the immune cell and a drug other than the anti-FGFR3 antibody.
- the present invention also provides a composition for combination therapy comprising the antibody or antigen-binding fragment thereof and at least one selected from the group consisting of:
- immune cells comprising an antigen receptor (CAR) comprising an scFv fragment for an antibody other than an anti-FGFR3 antibody as an extracellular domain; and
- CAR antigen receptor
- the present invention also provides a composition for combination therapy comprising the bispecific or multispecific antibody and at least one selected from the group consisting of:
- immune cells comprising an antigen receptor (CAR) comprising an scFv fragment for an antibody other than an anti-FGFR3 antibody as an extracellular domain; and
- CAR antigen receptor
- the present invention also relates to the antibody or antigen-binding fragment thereof, a bi- or multispecific antibody comprising the antibody or antigen-binding fragment thereof, an antibody-drug conjugate comprising the antibody or antigen-binding fragment thereof, the antibody or antigen thereof It provides a composition for the treatment of cancer, comprising a chimeric antigen receptor containing a binding fragment or immune cells into which the chimeric antigen receptor is introduced.
- the present invention also provides for the treatment of cancer in which the fusion gene of FGFR3 and TACC3 is amplified, there is a mutation in the fusion gene, the fusion gene is overexpressed, or the fusion gene is constitutive activation.
- An antigen-binding fragment thereof, a bi- or multispecific antibody comprising the antibody or antigen-binding fragment thereof, an antibody-drug conjugate comprising the antibody or antigen-binding fragment thereof, a chimeric antigen receptor comprising the antibody or antigen-binding fragment thereof Or, it provides a composition for treating cancer, comprising immune cells into which the chimeric antigen receptor is introduced.
- the present invention also comprises the steps of confirming that the fusion gene of FGFR3 and TACC3 is amplified in a patient-derived sample, there is a mutation in the fusion gene, the fusion gene is overexpressed, or the fusion gene is always expressed (constitutive activation); When it is confirmed that the fusion gene of FGFR3 and TACC3 is amplified, there is a mutation in the fusion gene, the fusion gene is overexpressed, or the fusion gene is always expressed (constitutive activation), the antibody or antigen-binding fragment thereof, the antibody or its A dual or multispecific antibody comprising an antigen-binding fragment, an antibody-drug conjugate comprising the antibody or antigen-binding fragment thereof, a chimeric antigen receptor comprising the antibody or antigen-binding fragment thereof, or the chimeric antigen receptor is introduced It provides a cancer treatment method comprising the step of administering immune cells.
- the present invention also provides a vesicle (vesicle) in which the antibody or antigen-binding fragment thereof is expressed to the outside or present therein.
- FIG. 1 shows a schematic diagram of phage display-based biopanning used in the present invention.
- Figure 1a shows a schematic diagram of cell panning using FGFR3-overexpressing patient-derived cells.
- Figure 1b shows a schematic diagram of a stationary phase bio-panning using the FGFR3 recombinant protein.
- Figure 1c shows a schematic diagram of solution phase biopanning using the FGFR3 recombinant protein.
- Figure 1d shows a schematic diagram of magnetic-based semi-automated panning using the FGFR3 recombinant protein.
- Figure 2a shows the results of biopanning for antibody screening according to the present invention.
- Figure 2b shows the results of ELISA screening for antibody screening according to the present invention.
- Figure 2c shows the results of magnetic beads based panning for antibody screening according to the present invention.
- Figure 3a shows a schematic diagram of the conversion from scFv to IgG format.
- Figure 3b shows the antibody production and purity / properties analysis results based on Expi293.
- FIG. 4a to 4d show the results of the affinity ELISA of the FGFR3 antibody (IgG).
- Figure 4a is the specific binding capacity of the antibody to the recombinant protein human FGFR3-IIIc
- Figure 4b is the specific binding capacity of the antibody to the recombinant protein human FGFR3-IIIb
- Figure 4c is the specific binding capacity of the antibody to the recombinant protein mouse FGFR3
- a diagram 4d shows the specific binding ability of the antibody to the recombinant protein cynomolgus monkey FGFR3.
- 5 shows the results of KD value evaluation through Biacore 3000 of the FGFR3 antibody (IgG).
- FIG. 6 shows the results of FGFR3 expression confirmation and FGFR3-TACC3 fusion analysis of brain tumor patient-derived cells.
- Figure 6a is the mRNA expression level (RPKM) analysis of patient-derived cells, protein expression level analysis (western blotting), cell surface expression analysis (FACS analysis) results
- Figure 6b is FGFR3-TACC3 fusion confirmation through RT-PCR: fusion A specific primer is indicated.
- FIG. 7a shows the results of cell surface binding analysis of FGFR3 antibody clones to FGFR3(-TACC3) overexpressing brain tumor patient-derived cells.
- Figure 7b shows the results of analysis of the binding pattern for each concentration of the F309 antibody to FGFR3 (-TACC3) overexpressing brain tumor patient-derived cells.
- Figure 7c shows the results of analysis of the binding affinity of the F309 and FS306 antibodies to a cell line without FGFR3 expression.
- FIG. 8 shows the results of analysis and screening for FGFR3 (-TACC3) resolution on the patient-derived cell surface of the FACS-based FGFR3 antibody.
- Figure 9a shows the results of analysis of the FGFR3-specific binding capacity of the F309 and FS306 antibodies, and confirming the non-competitive properties of the ligand.
- Figure 9b shows the unique epitope domain identification of the F309 and FS306 antibodies: Domain I results.
- Figure 9c shows the results of the recombinant domain design for epitope domain mapping.
- FIG. 10 shows the target resolution analysis results of F309 and FS306 antibodies for FGFR3-TACC3 overexpressing brain tumor patient-derived cells and FGFR3 overexpressing cell lines.
- Figure 10a shows the cell surface FGFR3-TACC3 and FGFR3 resolution analysis of the F309 and FS306 antibodies: FACS analysis results.
- Figure 10b shows the total FGFR3-TACC3 and FGFR3 resolution analysis of the F309 and FS306 antibodies: Western blotting results.
- 11 shows the results of cell internalization analysis of F309 and FS306 antibodies.
- 11a shows the results of cell internalization analysis: ICC analysis in FGFR3-TACC3 overexpressing brain tumor patient-derived cells.
- 11b shows the results of confirming the lysosomal degradation mechanism of F309 and FS306 antibodies through Lysosome inhibitor treatment.
- 12 shows the results of analysis of FGFR3 sub-signaling inhibition of F309 and FS306 antibodies.
- Figure 13a shows the results of the ligand-dependent cell growth inhibition assay (FGF1, FGF9).
- 13B shows the results of a ligand-independent cell growth inhibition assay (FGFR3-TACC3-overexpressing brain tumor patient-derived cells, FGFR3 low-expression cell lines or brain tumor patient-derived cells).
- 14A shows the results of short-term PK analysis of F309 and FS306.
- FIG. 14B shows the results of evaluation of antibody efficacy in FGFR3-TACC3 overexpressing brain tumor patient-derived cell transplanted mice (PDX).
- Figure 14c shows the efficacy evaluation (FGFR3-TACC3 overexpressing brain tumor patient-derived cells) results in the PDX model of the F309 antibody.
- Figure 15a shows a schematic diagram of 3D, 2D structure and strategic affinity improvement of the F309 antibody.
- 15B shows the affinity comparison results of the F309 affinity-improved antibody through affinity ELISA.
- 15c shows the results of SPR analysis of the F309 affinity-improved antibody.
- Figure 15c shows the results of the ligand-independent cell growth inhibition analysis (FGFR3-TACC3 overexpressing brain tumor patient-derived cells) of the improved antibody clones F309.
- Figure 16a shows a manufacturing schematic diagram for confirming the applicability of the antibody-drug conjugate (ADC) of the F309 antibody.
- Fig. 16 shows the cytotoxicity analysis results of F309-vc MMAE on FGFR3-TACC3 overexpressing brain tumor patient-derived cells and FGFR3 overexpressing cell lines.
- Fig. 16c shows the results of cytotoxicity analysis-1 according to the FGFR3 expression level of F309-vc MMAE
- Fig. 16d shows the results of cytotoxicity analysis-2 according to the FGFR3 expression level of F309-vc MMAE.
- FIG 17 shows the Fv structure and epitope domain mapping and antigen-specific binding analysis results of the affinity matured antibody.
- FIG. 23 shows a schematic diagram of ADC preparation including affinity matured antibody (Topoisomerase I inhibitor conjugation).
- FIG. 24 is a schematic diagram of ADC preparation including affinity matured antibody (Topoisomerase I inhibitor conjugation).
- Figure 31 shows the in vivo efficacy evaluation results of the affinity matured antibody-containing ADC.
- Fig. 32 shows the results of evaluation of ADC efficacy in the FGFR3 (TACC3 fusion) brain tumor stereotactic animal model of ADC with affinity matured antibody.
- the present invention provides a heavy chain CDR1 comprising at least one amino acid sequence selected from the group consisting of SEQ ID NO: 1 to SEQ ID NO: 18, and a heavy chain CDR2 comprising at least one amino acid sequence selected from the group consisting of SEQ ID NO: 19 to SEQ ID NO: 41 , a heavy chain CDR3 comprising at least one amino acid sequence selected from the group consisting of SEQ ID NO: 42 to SEQ ID NO: 66, SEQ ID NO: 186 to 198, a light chain CDR1 comprising at least one amino acid sequence selected from the group consisting of SEQ ID NO: 67 to SEQ ID NO: 88 , a light chain CDR2 comprising at least one amino acid sequence selected from the group consisting of SEQ ID NO: 89 to SEQ ID NO: 109, and at least one amino acid sequence selected from the group consisting of SEQ ID NO: 110 to SEQ ID NO: 132, SEQ ID NO: 199 to SEQ ID NO: 202 It relates to an
- the term “antibody” refers to an anti-FGFR3 antibody that specifically binds to FGFR3.
- the scope of the present invention includes not only complete antibody forms that specifically bind to FGFR3, but also antigen-binding fragments of the antibody molecule.
- the antibody according to the invention may target FGFR3-TACC3.
- the antibody according to the present invention was selected as an antibody having better efficacy against FGFR3-TACC3 overexpressing cancer cells than a known anti-FGFR3 antibody.
- a complete antibody has a structure having two full-length light chains and two full-length heavy chains, each light chain connected to the heavy chain by a disulfide bond.
- the term “heavy chain” refers to a full-length heavy chain comprising a variable region domain VH comprising an amino acid sequence having sufficient variable region sequence to confer specificity to an antigen and three constant region domains CH1, CH2 and CH3. and fragments thereof.
- the term “light chain” refers to a full-length light chain comprising a variable region domain VL and a constant region domain CL comprising an amino acid sequence having sufficient variable region sequence to confer specificity to an antigen, and fragments thereof. all means
- the whole antibody includes subtypes of IgA, IgD, IgE, IgM and IgG, in particular, IgG includes IgG1, IgG2, IgG3 and IgG4.
- the heavy chain constant region has gamma ( ⁇ ), mu ( ⁇ ), alpha ( ⁇ ), delta ( ⁇ ) and epsilon ( ⁇ ) types and subclasses gamma 1 ( ⁇ 1), gamma 2 ( ⁇ 2), gamma 3 ( ⁇ 3). ), gamma 4 ( ⁇ 4), alpha 1 ( ⁇ 1) and alpha 2 ( ⁇ 2).
- the constant region of the light chain has a kappa ( ⁇ ) and a lambda ( ⁇ ) type.
- Antigen-binding fragment or antibody fragment of an antibody refers to a fragment having an antigen-binding function, and includes Fab, F(ab'), F(ab')2 and Fv.
- Fab has a structure having variable regions of light and heavy chains, a constant region of a light chain and a first constant region (CH1) of a heavy chain, and has one antigen-binding site.
- Fab' differs from Fab in that it has a hinge-region comprising one or more cysteine residues at the C-terminus of the heavy chain CH1 domain.
- F(ab')2 is formed when a cysteine residue in the hinge region of Fab' forms a disulfide bond.
- Fv corresponds to the smallest antibody fragment having only a heavy chain variable region and a light chain variable region.
- double-chain Fv two-chain Fv
- the heavy chain variable region and the light chain variable region are connected by a non-covalent bond
- single-chain Fv scFv
- scFv single-chain Fv
- antibody fragments can be prepared using proteolytic enzymes (for example, by restriction digestion of the intact antibody with papain to obtain Fab, and by digestion with pepsin to obtain F(ab')2), or by genetic recombination technology. can be produced using proteolytic enzymes (for example, by restriction digestion of the intact antibody with papain to obtain Fab, and by digestion with pepsin to obtain F(ab')2), or by genetic recombination technology. can be produced using proteolytic enzymes (for example, by restriction digestion of the intact antibody with papain to obtain Fab, and by digestion with pepsin to obtain F(ab')2), or by genetic recombination technology. can be produced using proteolytic enzymes (for example, by restriction digestion of the intact antibody with papain to obtain Fab, and by digestion with pepsin to obtain F(ab')2), or by genetic recombination technology. can be produced using proteolytic enzymes (for example, by restriction digestion of the intact antibody with papain to obtain Fab
- Fv fragment is an antibody fragment that contains a complete antibody recognition and binding site. This region is a dimer in which one heavy chain variable domain and one light chain variable domain are joined.
- a “Fab” fragment comprises the variable and constant domains of a light chain and the variable and first constant domains (CH1) of a heavy chain.
- F(ab')2 antibody fragments generally comprise a pair of Fab' fragments covalently linked by cysteines in the hinge region present at the C-terminus of the Fab' fragment.
- a “single chain Fv (scFv)” antibody fragment is a construct consisting of a single polypeptide chain comprising the VH and VL domains of an antibody. It may further comprise a polypeptide linker between the VH domain and the VL domain that enables the scFv to form the desired structure for antigen binding.
- the antibody of the invention is a monoclonal antibody, multispecific antibody, human antibody, humanized antibody, chimeric antibody, scFv, Fab fragment, F(ab')2 fragment, disulfide-bonded Fvs (sdFv) and anti-idiotypic (anti-Id) antibodies, or epitope-binding fragments of such antibodies, and the like.
- the heavy chain constant region may be selected from any one isotype of gamma ( ⁇ ), mu ( ⁇ ), alpha ( ⁇ ), delta ( ⁇ ) or epsilon ( ⁇ ).
- the constant region is gamma 1 (IgG1), gamma 2 (IgG2), gamma 3 (IgG3) or gamma 4 (IgG4).
- the light chain constant region may be kappa or lambda type.
- Said monoclonal antibody refers to an antibody obtained from a substantially homogeneous population of antibodies, i.e., the individual antibodies comprising the population are identical except for possible naturally occurring mutations that may be present in trace amounts.
- Monoclonal antibodies are highly specific, being directed against a single antigenic site.
- conventional (polyclonal) antibodies which typically include different antibodies against different determinants (epitopes)
- each monoclonal antibody is directed against a single determinant on the antigen.
- Epitope refers to a protein determinant to which an antibody can specifically bind. Epitopes are usually composed of a group of chemically active surface molecules, such as amino acids or sugar side chains, and generally have specific three-dimensional structural characteristics as well as specific charge properties. Conformational and non-steric epitopes are distinguished in that binding to the former is lost but not to the latter in the presence of a denaturing solvent.
- the antibody or antigen-binding fragment thereof according to the present invention is, for example, any one selected from the group consisting of three immune domains D1, D2 and D3 present in the extracellular region of FGFR3, for example, D1, D2 or D3 can bind to a domain.
- the antibody or antigen-binding fragment thereof according to the present invention may specifically bind to domain 1 (SEQ ID NO: 184) of FGFR3 of SEQ ID NO: 183 and may not compete for binding with an FGF ligand.
- non-human antibodies are chimeric antibodies that contain minimal sequence derived from non-human immunoglobulin.
- humanized antibodies are of a non-human species (donor antibody) that retain the desired specificity, affinity and ability for residues from the hypervariable region of the recipient, eg, mouse, rat, rabbit or non-human primate. It is a human immunoglobulin (recipient antibody) replaced with residues from the hypervariable region of
- human antibody is a molecule derived from human immunoglobulin, and means that the entire amino acid sequence constituting the antibody, including the complementarity determining region and structural region, is composed of human immunoglobulin.
- a portion of the heavy and/or light chain is identical to or homologous to the corresponding sequence in an antibody derived from a particular species or belonging to a particular antibody class or subclass, while the remaining chain(s) are derived from another species or are of another antibody class or subclass.
- Included are "chimeric" antibodies (immunoglobulins) that are identical to or homologous to the corresponding sequence in antibodies belonging to subclasses, as well as fragments of such antibodies that exhibit the desired biological activity.
- variable region of an antibody refers to the light and heavy chain portions of an antibody molecule comprising the amino acid sequences of complementarity determining regions (CDRs; ie, CDR1, CDR2, and CDR3) and framework regions (FR).
- CDRs complementarity determining regions
- FR framework regions
- VH refers to the variable domain of a heavy chain
- VL refers to the variable domain of the light chain.
- CDR complementarity determining region
- the anti-FGFR3 antibody or antigen-binding fragment thereof according to the present invention is selected as an antibody having better efficacy against FGFR3-TACC3 overexpressing cancer cells than a known anti-FGFR3 antibody, and may include, for example:
- a heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 1, heavy chain CDR2 of SEQ ID NO: 19 and heavy chain CDR3 of SEQ ID NO: 42, light chain CDR1 of SEQ ID NO: 67, light chain CDR2 of SEQ ID NO: 89 and light chain CDR3 of SEQ ID NO: 110 light chain variable region,
- heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 2, heavy chain CDR2 of SEQ ID NO: 20 and heavy chain CDR3 of SEQ ID NO: 43, light chain CDR1 of SEQ ID NO: 68, light chain CDR2 of SEQ ID NO: 90 and light chain CDR3 of SEQ ID NO: 111 light chain variable region,
- heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 3, heavy chain CDR2 of SEQ ID NO: 21 and heavy chain CDR3 of SEQ ID NO: 44, light chain CDR1 of SEQ ID NO: 69, light chain CDR2 of SEQ ID NO: 91 and light chain CDR3 of SEQ ID NO: 112 light chain variable region,
- heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 4, heavy chain CDR2 of SEQ ID NO: 22 and heavy chain CDR3 of SEQ ID NO: 45, light chain CDR1 of SEQ ID NO: 70, light chain CDR2 of SEQ ID NO: 92 and light chain CDR3 of SEQ ID NO: 113 light chain variable region,
- heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 5, heavy chain CDR2 of SEQ ID NO: 23 and heavy chain CDR3 of SEQ ID NO: 46, light chain CDR1 of SEQ ID NO: 71, light chain CDR2 of SEQ ID NO: 93 and light chain CDR3 of SEQ ID NO: 114 light chain variable region,
- a heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 5, heavy chain CDR2 of SEQ ID NO: 23 and heavy chain CDR3 of SEQ ID NO: 186, light chain CDR1 of SEQ ID NO: 71, light chain CDR2 of SEQ ID NO: 93 and light chain CDR3 of SEQ ID NO: 114 light chain variable region,
- a heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 5, heavy chain CDR2 of SEQ ID NO: 23 and heavy chain CDR3 of SEQ ID NO: 187, light chain CDR1 of SEQ ID NO: 71, light chain CDR2 of SEQ ID NO: 93 and light chain CDR3 of SEQ ID NO: 114 light chain variable region,
- a heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 5, heavy chain CDR2 of SEQ ID NO: 23 and heavy chain CDR3 of SEQ ID NO: 188, light chain CDR1 of SEQ ID NO: 71, light chain CDR2 of SEQ ID NO: 93 and light chain CDR3 of SEQ ID NO: 114 light chain variable region,
- a heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 5, heavy chain CDR2 of SEQ ID NO: 23 and heavy chain CDR3 of SEQ ID NO: 189, light chain CDR1 of SEQ ID NO: 71, light chain CDR2 of SEQ ID NO: 93 and light chain CDR3 of SEQ ID NO: 114 light chain variable region,
- a heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 5, heavy chain CDR2 of SEQ ID NO: 23 and heavy chain CDR3 of SEQ ID NO: 190, light chain CDR1 of SEQ ID NO: 71, light chain CDR2 of SEQ ID NO: 93 and light chain CDR3 of SEQ ID NO: 114 light chain variable region,
- a heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 5, heavy chain CDR2 of SEQ ID NO: 23 and heavy chain CDR3 of SEQ ID NO: 191, light chain CDR1 of SEQ ID NO: 71, light chain CDR2 of SEQ ID NO: 93 and light chain CDR3 of SEQ ID NO: 114 light chain variable region,
- a heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 5, heavy chain CDR2 of SEQ ID NO: 23 and heavy chain CDR3 of SEQ ID NO: 192, light chain CDR1 of SEQ ID NO: 71, light chain CDR2 of SEQ ID NO: 93 and light chain CDR3 of SEQ ID NO: 114 light chain variable region,
- a heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 5, heavy chain CDR2 of SEQ ID NO: 23 and heavy chain CDR3 of SEQ ID NO: 193, light chain CDR1 of SEQ ID NO: 71, light chain CDR2 of SEQ ID NO: 93 and light chain CDR3 of SEQ ID NO: 114 light chain variable region,
- a heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 5, heavy chain CDR2 of SEQ ID NO: 23 and heavy chain CDR3 of SEQ ID NO: 194, light chain CDR1 of SEQ ID NO: 71, light chain CDR2 of SEQ ID NO: 93 and light chain CDR3 of SEQ ID NO: 114 light chain variable region,
- a heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 5, heavy chain CDR2 of SEQ ID NO: 23 and heavy chain CDR3 of SEQ ID NO: 195, light chain CDR1 of SEQ ID NO: 71, light chain CDR2 of SEQ ID NO: 93 and light chain CDR3 of SEQ ID NO: 114 light chain variable region,
- heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 5, heavy chain CDR2 of SEQ ID NO: 23 and heavy chain CDR3 of SEQ ID NO: 196, light chain CDR1 of SEQ ID NO: 71, light chain CDR2 of SEQ ID NO: 93 and light chain CDR3 of SEQ ID NO: 114 light chain variable region,
- a heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 5, heavy chain CDR2 of SEQ ID NO: 23 and heavy chain CDR3 of SEQ ID NO: 197, light chain CDR1 of SEQ ID NO: 71, light chain CDR2 of SEQ ID NO: 93 and light chain CDR3 of SEQ ID NO: 114 light chain variable region,
- a heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 5, heavy chain CDR2 of SEQ ID NO: 23 and heavy chain CDR3 of SEQ ID NO: 198, light chain CDR1 of SEQ ID NO: 71, light chain CDR2 of SEQ ID NO: 93 and light chain CDR3 of SEQ ID NO: 114 light chain variable region,
- heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 5, heavy chain CDR2 of SEQ ID NO: 23 and heavy chain CDR3 of SEQ ID NO: 46, light chain CDR1 of SEQ ID NO: 71, light chain CDR2 of SEQ ID NO: 93 and light chain CDR3 of SEQ ID NO: 199 light chain variable region,
- heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 5, heavy chain CDR2 of SEQ ID NO: 23 and heavy chain CDR3 of SEQ ID NO: 46, light chain CDR1 of SEQ ID NO: 71, light chain CDR2 of SEQ ID NO: 93 and light chain CDR3 of SEQ ID NO: 200 light chain variable region,
- heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 5, heavy chain CDR2 of SEQ ID NO: 23 and heavy chain CDR3 of SEQ ID NO: 46, light chain CDR1 of SEQ ID NO: 71, light chain CDR2 of SEQ ID NO: 93 and light chain CDR3 of SEQ ID NO: 201 light chain variable region,
- heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 5, heavy chain CDR2 of SEQ ID NO: 23 and heavy chain CDR3 of SEQ ID NO: 46, light chain CDR1 of SEQ ID NO: 71, light chain CDR2 of SEQ ID NO: 93 and light chain CDR3 of SEQ ID NO: 202 light chain variable region,
- heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 4, heavy chain CDR2 of SEQ ID NO: 24 and heavy chain CDR3 of SEQ ID NO: 47, light chain CDR1 of SEQ ID NO: 72, light chain CDR2 of SEQ ID NO: 94 and light chain CDR3 of SEQ ID NO: 115 light chain variable region,
- heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 6, heavy chain CDR2 of SEQ ID NO: 25 and heavy chain CDR3 of SEQ ID NO: 48, light chain CDR1 of SEQ ID NO: 73, light chain CDR2 of SEQ ID NO: 95 and light chain CDR3 of SEQ ID NO: 112 light chain variable region,
- heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 7, heavy chain CDR2 of SEQ ID NO: 26 and heavy chain CDR3 of SEQ ID NO: 49, light chain CDR1 of SEQ ID NO: 74, light chain CDR2 of SEQ ID NO: 96 and light chain CDR3 of SEQ ID NO: 116 light chain variable region,
- heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 8, heavy chain CDR2 of SEQ ID NO: 27 and heavy chain CDR3 of SEQ ID NO: 50, light chain CDR1 of SEQ ID NO: 75, light chain CDR2 of SEQ ID NO: 97 and light chain CDR3 of SEQ ID NO: 117 light chain variable region,
- heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 9, heavy chain CDR2 of SEQ ID NO: 28 and heavy chain CDR3 of SEQ ID NO: 51, light chain CDR1 of SEQ ID NO: 76, light chain CDR2 of SEQ ID NO: 98 and light chain CDR3 of SEQ ID NO: 118 light chain variable region,
- heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 10, heavy chain CDR2 of SEQ ID NO: 29 and heavy chain CDR3 of SEQ ID NO: 52, light chain CDR1 of SEQ ID NO: 77, light chain CDR2 of SEQ ID NO: 97 and light chain CDR3 of SEQ ID NO: 119 light chain variable region,
- heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 11, heavy chain CDR2 of SEQ ID NO: 30 and heavy chain CDR3 of SEQ ID NO: 53, light chain CDR1 of SEQ ID NO: 78, light chain CDR2 of SEQ ID NO: 99 and light chain CDR3 of SEQ ID NO: 120 light chain variable region,
- heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 11, heavy chain CDR2 of SEQ ID NO: 31 and heavy chain CDR3 of SEQ ID NO: 54, light chain CDR1 of SEQ ID NO: 79, light chain CDR2 of SEQ ID NO: 100 and light chain CDR3 of SEQ ID NO: 121 light chain variable region,
- a heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 12, heavy chain CDR2 of SEQ ID NO: 32 and heavy chain CDR3 of SEQ ID NO: 55, light chain CDR1 of SEQ ID NO: 80, light chain CDR2 of SEQ ID NO: 101 and light chain CDR3 of SEQ ID NO: 122 light chain variable region,
- heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 3, heavy chain CDR2 of SEQ ID NO: 33 and heavy chain CDR3 of SEQ ID NO: 56, light chain CDR1 of SEQ ID NO: 81, light chain CDR2 of SEQ ID NO: 102 and light chain CDR3 of SEQ ID NO: 123 light chain variable region,
- a heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 13, heavy chain CDR2 of SEQ ID NO: 34 and heavy chain CDR3 of SEQ ID NO: 57, light chain CDR1 of SEQ ID NO: 82, light chain CDR2 of SEQ ID NO: 103 and light chain CDR3 of SEQ ID NO: 124 light chain variable region,
- heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 14, heavy chain CDR2 of SEQ ID NO: 35 and heavy chain CDR3 of SEQ ID NO: 58, light chain CDR1 of SEQ ID NO: 83, light chain CDR2 of SEQ ID NO: 104 and light chain CDR3 of SEQ ID NO: 125 light chain variable region,
- a heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 1, heavy chain CDR2 of SEQ ID NO: 36 and heavy chain CDR3 of SEQ ID NO: 59, light chain CDR1 of SEQ ID NO: 84, light chain CDR2 of SEQ ID NO: 105 and light chain CDR3 of SEQ ID NO: 126 light chain variable region,
- heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 6, heavy chain CDR2 of SEQ ID NO: 23 and heavy chain CDR3 of SEQ ID NO: 60, light chain CDR1 of SEQ ID NO: 69, light chain CDR2 of SEQ ID NO: 91 and light chain CDR3 of SEQ ID NO: 127 light chain variable region,
- heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 15, heavy chain CDR2 of SEQ ID NO: 37 and heavy chain CDR3 of SEQ ID NO: 61, light chain CDR1 of SEQ ID NO: 85, light chain CDR2 of SEQ ID NO: 89 and light chain CDR3 of SEQ ID NO: 128 light chain variable region,
- a heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 16, heavy chain CDR2 of SEQ ID NO: 38 and heavy chain CDR3 of SEQ ID NO: 62, light chain CDR1 of SEQ ID NO: 86, light chain CDR2 of SEQ ID NO: 106 and light chain CDR3 of SEQ ID NO: 129 light chain variable region,
- a heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 17, heavy chain CDR2 of SEQ ID NO: 39 and heavy chain CDR3 of SEQ ID NO: 63, light chain CDR1 of SEQ ID NO: 87, light chain CDR2 of SEQ ID NO: 107 and light chain CDR3 of SEQ ID NO: 130 light chain variable region,
- heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 4, heavy chain CDR2 of SEQ ID NO: 19 and heavy chain CDR3 of SEQ ID NO: 64, light chain CDR1 of SEQ ID NO: 88, light chain CDR2 of SEQ ID NO: 108 and light chain CDR3 of SEQ ID NO: 131 light chain variable region,
- a heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 18, heavy chain CDR2 of SEQ ID NO: 40 and heavy chain CDR3 of SEQ ID NO: 65, light chain CDR1 of SEQ ID NO: 85, light chain CDR2 of SEQ ID NO: 89 and light chain CDR3 of SEQ ID NO: 128 a light chain variable region, or
- a heavy chain variable region comprising heavy chain CDR1 of SEQ ID NO: 16, heavy chain CDR2 of SEQ ID NO: 41 and heavy chain CDR3 of SEQ ID NO: 66, light chain CDR1 of SEQ ID NO: 72, light chain CDR2 of SEQ ID NO: 109 and light chain CDR3 of SEQ ID NO: 132 light chain variable region.
- a “framework region (FR)” is a variable domain residue other than a CDR residue.
- Each variable domain typically has four FRs: FR1, FR2, FR3 and FR4.
- the binding affinity of the anti-FGFR3 antibody to FGFR3 is in the range of 10 -5 M to 10 -12 M.
- the binding affinity of an anti-FGFR3 antibody to FGFR3 is 10 -6 M to 10 -12 M, 10 -7 M to 10 -12 M, 10 -8 M to 10 -12 M, 10 -9 M to 10 -12 M, 10 -5 M to 10 -11 M, 10 -6 M to 10 -11 M, 10 -7 M to 10 -11 M, 10 -8 M to 10 -11 M, 10 -9 M to 10 -11 M, 10 -10 M to 10 -11 M, 10 -5 M to 10 -10 M, 10 -6 M to 10 -10 M, 10 -7 M to 10 -10 M, 10 -8 M to 10 -10 M, 10 -9 M to 10 -10 M, 10 -5 M to 10 -9 M, 10 -6 M to 10 -9 M, 10 -7 M to 10 -9 M, 10 -8 M to 10 -9 M, 10 -5 M to 10 -8 M, 10 -6 M
- the antibody or antigen-binding fragment thereof binding to FGFR3 may include a heavy chain variable region comprising one or more amino acid sequences selected from the group consisting of SEQ ID NO: 133 to SEQ ID NO: 157, SEQ ID NO: 203 to SEQ ID NO: 215.
- the antibody or antigen-binding fragment thereof binding to FGFR3 may include a light chain variable region comprising at least one amino acid sequence selected from the group consisting of SEQ ID NO: 158 to SEQ ID NO: 182, SEQ ID NO: 216 to SEQ ID NO: 219.
- it may include:
- An scFv is an antibody fragment, which is a construct consisting of a single polypeptide chain comprising the VH and VL domains of an antibody. It may further comprise a polypeptide linker between the VH domain and the VL domain that enables the scFv to form the desired structure for antigen binding.
- the VH and VL domains may be linked via a linker.
- the heavy chain variable region comprising at least one amino acid sequence selected from the group consisting of SEQ ID NO: 133 to SEQ ID NO: 157, SEQ ID NO: 203 to SEQ ID NO: 215 is SEQ ID NO: 158 to SEQ ID NO: 182, SEQ ID NO: 216 to SEQ ID NO: 219 through a linker It may be linked to a light chain variable region comprising one or more amino acid sequences selected from the group consisting of.
- it may include:
- the linker may be a peptide linker and may have a length of about 10-25 aa.
- hydrophilic amino acids such as glycine and/or serine may be included, but are not limited thereto.
- the linker may include, for example, (GS) n , (GGS) n , (GSGGS) n or (G n S) m (n and m are each 1 to 10), but the linker is For example, it may be (G n S) m (n and m are each 1 to 10).
- the linker may include GGGGS, for example, GGGGSGGGGSGGGGS of SEQ ID NO: 185 repeated three times.
- Phage display is a technique for displaying a variant polypeptide as a fusion protein with at least a portion of an envelope protein on the surface of a phage, eg, a filamentous phage particle.
- the usefulness of phage display lies in the fact that it can rapidly and efficiently sort sequences that bind with high affinity to a target antigen by targeting a large library of randomized protein variants. Displaying peptide and protein libraries on phage has been used to screen millions of polypeptides for polypeptides with specific binding properties.
- Phage display technology has provided a powerful tool for generating and screening novel proteins that bind specific ligands (eg antigens). Using phage display technology, large libraries of protein variants can be generated and sequences that bind with high affinity to target antigens can be rapidly sorted.
- a nucleic acid encoding a variant polypeptide is fused with a nucleic acid sequence encoding a viral envelope protein, for example a gene III protein or a gene VIII protein.
- a monovalent phage display system has been developed in which a nucleic acid sequence encoding a protein or polypeptide is fused with a nucleic acid sequence encoding a portion of a gene III protein. In a monovalent phage display system, the gene fusion is expressed at low levels and the wild-type gene III protein is also expressed to maintain particle infectivity.
- Proving the expression of peptides on the surface of filamentous phage and functional antibody fragments in the periplasm of E. coli is important for developing antibody phage display libraries.
- Libraries of antibodies or antigen-binding polypeptides have been prepared in a number of ways, for example by altering a single gene by inserting a random DNA sequence or by cloning a family of related genes.
- the library can be screened for expression of an antibody or antigen-binding protein accompanied by a desired characteristic.
- Phage display technology has several advantages over conventional hybridoma and recombinant methods for producing antibodies with desired characteristics. This technique allows the generation of large antibody libraries with various sequences in a short time without using animals. The production of hybridomas or humanized antibodies may require a production period of several months. In addition, since no immunization is required, the phage antibody library can generate antibodies against antigens that are toxic or of low antigenicity. Phage antibody libraries can also be used to generate and identify novel therapeutic antibodies.
- phage display libraries Techniques for generating human antibodies from immunized, non-immunized human, germline sequences, or na ⁇ ve B cell Ig repertoires using phage display libraries can be used.
- a variety of lymphoid tissues can be used to prepare na ⁇ ve or non-immune antigen-binding libraries.
- a technology capable of identifying and isolating high-affinity antibodies from phage display libraries is important for isolating novel therapeutic antibodies.
- Isolation of high affinity antibodies from a library may depend on the size of the library, production efficiency in bacterial cells, and diversity of the library.
- the size of the library is reduced by improper folding of the antibody or antigen-binding protein and inefficient production due to the presence of stop codons.
- Expression in bacterial cells can be inhibited if the antibody or antigen binding domain does not fold properly.
- Expression can be improved by alternately mutating residues on the surface of the variable/constant interface or at selected CDR residues.
- the sequence of the framework regions is one element to provide for proper folding when generating antibody phage libraries in bacterial cells.
- CDR3 regions have been found to often participate in antigen binding. Since the CDR3 regions on the heavy chain vary considerably in size, sequence and structural conformation, they can be used to prepare a variety of libraries.
- Diversity can also be generated by randomizing the CDR regions of the variable heavy and light chains using all 20 amino acids at each position.
- the use of all 20 amino acids can result in highly diverse variant antibody sequences and increase the chances of identifying novel antibodies.
- the antibody or antibody fragment of the present invention may include not only the sequence of the anti-FGFR3 antibody of the present invention described herein, but also a biological equivalent thereof to the extent that it can specifically recognize FGFR3.
- additional changes may be made to the amino acid sequence of an antibody to further improve the binding affinity and/or other biological properties of the antibody.
- modifications include, for example, deletions, insertions and/or substitutions of amino acid sequence residues of the antibody.
- amino acid variations are made based on the relative similarity of amino acid side chain substituents, such as hydrophobicity, hydrophilicity, charge, size, and the like.
- arginine, lysine and histidine are all positively charged residues; Alanine, glycine and serine have similar sizes; It can be seen that phenylalanine, tryptophan and tyrosine have similar shapes. Therefore, based on these considerations, arginine, lysine and histidine; alanine, glycine and serine; And phenylalanine, tryptophan and tyrosine can be said to be biologically functional equivalents.
- the antibody or nucleic acid molecule encoding the antibody of the present invention is interpreted to include a sequence showing substantial identity to the sequence set forth in SEQ ID NO:.
- the substantial identity is at least 90% when the sequence of the present invention and any other sequences are aligned to the maximum correspondence, and the aligned sequence is analyzed using an algorithm commonly used in the art. refers to a sequence exhibiting homology, most preferably at least 95% homology, at least 96% homology, at least 97% homology, at least 98% homology, at least 99% homology.
- Alignment methods for sequence comparison are known in the art.
- the NCBI Basic Local Alignment Search Tool (BLAST) can be accessed from NBCI, etc.
- BLAST can be accessed at www.ncbi.nlm.nih.gov/BLAST/.
- a method for comparing sequence homology using this program can be found at www.ncbi.nlm.nih.gov/BLAST/blast_help.html.
- the antibody or antigen-binding fragment thereof of the present invention is 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98% compared to the specified sequence or all of the sequences described in the specification. , 99%, or more homology.
- homology can be determined by sequence comparison and/or alignment by methods known in the art. For example, a sequence comparison algorithm (ie, BLAST or BLAST 2.0), manual alignment, or visual inspection can be used to determine the percent sequence homology of a nucleic acid or protein of the invention.
- the present invention relates to a nucleic acid encoding the antibody or antigen-binding fragment thereof.
- An antibody or antigen-binding fragment thereof can be recombinantly produced by isolating a nucleic acid encoding an antibody or antigen-binding fragment thereof of the present invention.
- Nucleic acid has a meaning comprehensively encompassing DNA (gDNA and cDNA) and RNA molecules, and nucleotides, which are the basic building blocks of nucleic acids, include natural nucleotides as well as analogues in which sugar or base regions are modified. .
- the sequences of the nucleic acids encoding the heavy and light chain variable regions of the present invention may be modified. Such modifications include additions, deletions, or non-conservative or conservative substitutions of nucleotides.
- DNA encoding the antibody is easily isolated or synthesized using conventional molecular biological techniques (eg, by using an oligonucleotide probe capable of specifically binding to DNA encoding the antibody and the heavy and light chains)
- the nucleic acid is isolated and inserted into a replicable vector for further cloning (amplification of DNA) or further expression.
- the present invention relates to a recombinant expression vector comprising the nucleic acid in another aspect.
- the term "vector” is a means for expressing a target gene in a host cell, and a viral vector such as a plasmid vector, a cosmid vector, a bacteriophage vector, an adenoviral vector, a retroviral vector, and an adeno-associated viral vector. etc.
- Components of a vector generally include, but are not limited to, one or more of the following: a signal sequence, an origin of replication, one or more antibiotic resistance marker genes, an enhancer element, a promoter, a transcription termination sequence. Nucleic acids encoding antibodies are operatively linked, such as promoters and transcription termination sequences.
- operably linked refers to a functional association between a nucleic acid expression control sequence (eg, an array of promoter, signal sequence or transcriptional regulator binding sites) and another nucleic acid sequence, such that the control sequence is the other nucleic acid sequence. to regulate transcription and/or translation of a nucleic acid expression control sequence (eg, an array of promoter, signal sequence or transcriptional regulator binding sites) and another nucleic acid sequence, such that the control sequence is the other nucleic acid sequence. to regulate transcription and/or translation of a nucleic acid expression control sequence (eg, an array of promoter, signal sequence or transcriptional regulator binding sites) and another nucleic acid sequence, such that the control sequence is the other nucleic acid sequence. to regulate transcription and/or translation of a nucleic acid expression control sequence (eg, an array of promoter, signal sequence or transcriptional regulator binding sites) and another nucleic acid sequence, such that the control sequence is the other nucleic acid sequence. to regulate transcription and/or translation of
- a strong promoter capable of propagating transcription eg, tac promoter, lac promoter, lacUV5 promoter, lpp promoter, pL ⁇ promoter, pR ⁇ promoter, rac5 promoter, amp promoter, recA promoter, SP6 promoter, trp promoter and T7 promoter
- a ribosome binding site for initiation of translation e.g, lac promoter, lacUV5 promoter, lpp promoter, pL ⁇ promoter, pR ⁇ promoter, rac5 promoter, amp promoter, recA promoter, SP6 promoter, trp promoter and T7 promoter
- a promoter derived from the genome of a mammalian cell eg, a metallotionine promoter, a ⁇ -actin promoter, a human heglobin promoter, and a human muscle creatine promoter
- a mammalian cell eg, a metallotionine promoter, a ⁇ -actin promoter, a human heglobin promoter, and a human muscle creatine promoter
- Promoters derived from animal viruses eg, adenovirus late promoter, vaccinia virus 7.5K promoter, SV40 promoter, cytomegalovirus (CMV) promoter, tk promoter of HSV, mouse mammary tumor virus (MMTV) promoter, LTR promoter of HIV , the promoter of Moloney virus, the promoter of Epstein Barr virus (EBV) and the promoter of Loose Sacoma virus (RSV)), and generally has a polyadenylation sequence as a transcription termination sequence.
- animal viruses eg, adenovirus late promoter, vaccinia virus 7.5K promoter, SV40 promoter, cytomegalovirus (CMV) promoter, tk promoter of HSV, mouse mammary tumor virus (MMTV) promoter, LTR promoter of HIV , the promoter of Moloney virus, the promoter of Epstein Barr virus (EBV) and the promoter of Loose Sacoma virus (RSV)
- the vector may be fused with other sequences to facilitate purification of the antibody expressed therefrom.
- Sequences to be fused include, for example, glutathione S-transferase (Pharmacia, USA), maltose binding protein (NEB, USA), FLAG (IBI, USA) and 6x His (hexahistidine; Quiagen, USA).
- the vector contains an antibiotic resistance gene commonly used in the art as a selection marker, for example, ampicillin, gentamicin, carbenicillin, chloramphenicol, streptomycin, kanamycin, geneticin, neomycin and tetracycline. There is a resistance gene.
- the present invention relates to a host cell transfected with the recombinant expression vector.
- the host cell used to produce the antibody of the invention can be, but is not limited to, a prokaryotic, yeast or higher eukaryotic cell.
- Bacillus genus strains such as Escherichia coli, Bacillus subtilus and Bacillus thuringiensis, Streptomyces, Pseudomonas (e.g., Pseudomonas) (Pseudomonas putida), Proteus mirabilis and Staphylococcus (eg, Staphylocus carnosus), such as prokaryotic host cells can be used.
- animal cells are of greatest interest, and examples of useful host cell lines include COS-7, BHK, CHO, CHOK1, DXB-11, DG-44, CHO/-DHFR, CV1, COS-7, HEK293, BHK, TM4, VERO, HELA, MDCK, BRL 3A, W138, Hep G2, SK-Hep, MMT, TRI, MRC 5, FS4, 3T3, RIN, A549, PC12, K562, PER.C6, SP2/0, NS-0 , U20S, or may be HT1080, but is not limited thereto.
- the present invention comprises the steps of culturing the host cell to generate an antibody; And it relates to a method for producing an antibody or antigen-binding fragment thereof that specifically binds to FGFR3, comprising the step of isolating and purifying the produced antibody.
- the host cells may be cultured in various media. Among commercially available media, it can be used as a culture medium without limitation. All other essential supplements known to those skilled in the art may be included in appropriate concentrations. Culture conditions, such as temperature, pH, etc., are already in use with the host cells selected for expression, as will be apparent to those skilled in the art.
- impurities may be removed by, for example, centrifugation or ultrafiltration, and the resultant product may be purified using, for example, affinity chromatography. Additional other purification techniques may be used, such as anion or cation exchange chromatography, hydrophobic interaction chromatography, hydroxylapatite chromatography, and the like.
- the present invention relates to a bispecific or multispecific antibody comprising the antibody or antigen-binding fragment thereof.
- Bispecific antibody refers to an antibody having binding ability or antagonistic ability to one or more targets, and a form in which an antibody having binding ability or antagonistic ability to two different targets is bound, or an antibody having binding ability to one target and a different target It refers to an antibody to which a substance having an antagonistic ability is bound.
- a multispecific antibody refers to an antibody having binding specificities for at least three different antigens.
- a multi-specific antibody is a tri-specific antibody or more, for example, a tri-specific antibody, a tetra-specific antibody, or a target that targets more. may include antibodies.
- Antibodies belonging to bispecific or multispecific antibodies may be classified into scFv-based antibodies, Fab-based antibodies, and IgG-based antibodies.
- a bispecific or multispecific antibody since two or more signals can be simultaneously inhibited or amplified, it can be more effective than when one signal is inhibited/amplified, and each signal can be treated with a respective signal inhibitor. Compared with the case, low dose administration is possible, and it is possible to suppress/amplify two or more signals in the same time and space.
- bispecific or multispecific antibodies Methods for making bispecific or multispecific antibodies are well known. Traditionally, recombinant production of bispecific antibodies is based on the co-expression of two or more immunoglobulin heavy/light chain pairs under conditions in which the two or more heavy chains have different specificities.
- a diabody can be made by combining the VL and VH of different scFvs with each other to prepare a hybrid scFv in a heterodimeric form, and different scFvs are linked to each other
- tendem ScFv can be prepared
- heterodimeric miniantibody can be prepared by expressing CH1 and CL of Fab at the ends of each scFv, and by substituting some amino acids in the CH3 domain, which is the homodimeric domain of Fc, 'knob' It is possible to prepare a minibody in the form of a heterodimeric scFv by changing into a heterodimeric structure in the form of 'into hole' and expressing these altered CH3 domains at different ends of each scFv.
- Fab's directed against a specific antigen can be combined with each other using a disulfide bond or a mediator to form a heterodimeric Fab, and the heavy or light chain of a specific Fab can be It can be prepared to have two antigen valencies by expressing scFvs for different antigens at the ends, or to have four antigen valencies in homodimeric form by providing a hinge region between Fab and scFv.
- bispecific or multispecific antibodies based on IgG hybrid hybridomas, also known as quadromas, were prepared by re-crossing mouse and rat hybridomas by Trion Pharma. Thus, a method for producing a bispecific antibody is known. In addition, while sharing the light chain portion, it is possible to prepare a bispecific antibody in the so-called 'Holes and Knob' form, which is produced in a heterodimeric form by modifying some amino acids of the CH3 homodimeric domain of Fc for different heavy chains.
- two different scFvs can be fused to the constant domains instead of the light and heavy chain variable domains of IgG to produce homodimeric (scFv)4-IgG.
- ImClone Inc. is based on IMC-1C11, a chimeric monoclonal antibody against human VEGFR-2, and mouse platelet-derived growth factor receptor- ⁇ at the amino terminus of the light chain of this antibody. ), a bispecific antibody was produced and reported by fusion of only a single variable domain.
- bispecific or multispecific antibodies that are bivalent, trivalent or more tetravalent.
- WO2001/077342, WO2009/080251, WO2009/080252, WO2009/080253, WO2009/080254, WO2010/112193, WO2010/115589 also included are the bivalent, trivalent or more tetravalent antibodies described in WO2010/136172, WO2010/145792, WO2010/145793 and WO2011/117330.
- a bivalent, trivalent or more tetravalent antibody indicates that two or more binding domains, three or more binding domains, or four or more binding domains, respectively, are present in the antibody molecule.
- the bi- or multispecific antibody according to the present invention comprises the anti-FGFR3 antibody or antigen-binding fragment, specifically in the form of an IgG complete antibody or fragment thereof, for example, single-chain Fv, VH domain and/or VL domain, It may be included in the form of Fab or (Fab)2.
- a bispecific antibody according to the present invention may contain FGFR3 and PD-1, PD-L1, BTLA, CTLA-4, VISTA, LAG3, TIM3, CD137(4-1BB), VISTA, CD258(LIGHT), TIGIT , CD134 (OX40), CD28, CD278 (ICOS), CD27, CD154 (CD40L), CD357 (GITR), CD30, DR3, CD226 (DNAM1), CD96, CD200, CD200R, Transferrin receptor, c-Met, EGFR, HER2 , KDR, PDGFRa, NRP1, it is possible to simultaneously target one or more selected from the group consisting of MARCO.
- the multispecific antibody according to the present invention may contain FGFR3 and PD-1, PD-L1, BTLA, CTLA-4, VISTA, LAG3, TIM3, CD137(4-1BB), VISTA, CD258(LIGHT), TIGIT , CD134 (OX40), CD28, CD278 (ICOS), CD27, CD154 (CD40L), CD357 (GITR), CD30, DR3, CD226 (DNAM1), CD96, CD200, CD200R, Transferrin receptor, c-Met, EGFR, HER2 , KDR, PDGFRa, NRP1, it is possible to simultaneously target two or more selected from the group consisting of MARCO.
- the present invention provides an immune cell engage bispecific or Multispecific antibodies.
- a cytolytic synapse between a cytotoxic T cell and a cancer target cell is temporarily induced to release a toxic substance.
- the immune cells are T cells, NK cells, cytokine-induced killer cells (CIK), activated cytotoxic T lymphocytes (CTL), macrophages, infiltrating T in tumor tissue It may be one or more selected from the group consisting of cells (Tumor-Infiltrating Lymphocytes, TIL) and dendritic cells.
- TIL Tumor-Infiltrating Lymphocytes
- the immune cell activating antigen may be selected from, for example, an antibody binding thereto may serve to engage immune cells:
- T cell activating antigens include CD3, TCR ⁇ , TCR ⁇ , TCR ⁇ , TCR ⁇ , ICOS, CD28, CD27, HVEM, LIGHT, CD40, 4-1BB, OX40, DR3, GITR, CD30, TIM1, SLAM, CD2, or CD226;
- NK cell activating antigens are NKp30, NKp40, NKp44, NKp46, NKG2D, DNAM1, DAP10, CD16 (e.g., CD16a, CD16b), CRTAM, CD27, PSGL1, CD96, CD100 (SEMA4D), NKp80, CD244 (SLAMF4 or 2B4), SLAMF6, SLAMF7, KIR2DS2, KIR2DS4, KIR3DS1, KIR2DS3, KIR2DS5, KIR2DS1, CD94, NKG2C, NKG2E or CD160;
- CD16 e.g., CD16a, CD16b
- CRTAM CD27, PSGL1, CD96, CD100 (SEMA4D)
- NKp80 CD244
- SLAMF4 or 2B4 SLAMF6, SLAMF7, KIR2DS2, KIR2DS4, KIR3DS1, KIR2DS3, KIR2DS5, KIR2DS1, CD94, NKG2
- B cell activating antigens include OX40, CD40 or CD70;
- Macrophage activating antigens include CD2 agonists, CD40, CD70, Toll-like Receptor (TCR) agonists, CD47, STING or OX40L; or
- the dendritic cell activating antigen is a CD2 agonist, OX40, OX40L, 41BB agonist, TCR agonist, CD47 agonist, or STING agonist.
- Immune cell engager is specifically described in US Patent Application Publication No. 2017/0368169, and may be incorporated herein by reference.
- the immune cell engaging bispecific or multispecific antibody comprises a tandem scFv and is capable of binding to the following antigens and surface antigens on cancer cells.
- the surface antigen on said cancer cells is FGFR3 targeted by the antibody according to the invention:
- CD16 e.g., CD16a, CD16b
- CRTAM CD27, PSGL1, CD96, CD100 (SEMA4D)
- NKp80 CD244
- SLAMF4 or 2B4 SLAMF7, KIR2DS2, SLAMF7, KIR2DS2 , KIR2DS4, KIR3DS1, KIR2DS3, KIR2DS5, KIR2DS1,
- CD2 agonist CD40, CD70, TCR (Toll-like Receptor) agonist, CD47, STING or OX40L; or
- CD2 agonist OX40, OX40L, 41BB agonist, TCR agonist, CD47 agonist, or STING agonist.
- Said immune cell engaging bispecific or multispecific antibody can be, for example, VL(FGFR3)-VH(FGFR3)-VH(CD3 or CD16A)-VL(CD3 or CD16A), VH(FGFR3)-VL(FGFR3) )-VH(CD3 or CD16A)-VL(CD3 or CD16A), VH(CD3 or CD16A)-VL(CD3 or CD16A)-VH(FGFR3)-VL(FGFR3) or VH(CD3 or CD16A)-VL(CD3) or CD16A)-VL(FGFR3)-VH(FGFR3) type structure.
- the scFv is, for example, a heavy chain variable region comprising at least one amino acid sequence selected from the group consisting of SEQ ID NO: 133 to SEQ ID NO: 157, SEQ ID NO: 203 to SEQ ID NO: 215, SEQ ID NO: 158 to SEQ ID NO: 182, SEQ ID NO: 216 to It includes a light chain variable region comprising at least one amino acid sequence selected from the group consisting of SEQ ID NO: 219, and the heavy chain variable region and the light chain variable region may be connected by a linker.
- the linker may be a peptide linker and may have a length of about 10-25 aa.
- hydrophilic amino acids such as glycine and/or serine may be included.
- the linker may include, for example, (GS)n, (GGS)n, (GSGGS)n or (GnS)m (n and m are each from 1 to 10), but the linker may include, for example, (GnS) )m (n and m are each 1 to 10).
- the linker may include GGGGS, for example, GGGGSGGGGSGGGGS of SEQ ID NO: 185 repeated three times.
- Examples of the immune cell engaging bispecific or multispecific antibody include blinatumomab (Amgen), which binds to CD3 and CD19; solitomab (Amgen) that binds to CD3 and EpCAM; MEDI 565 (MedImmune, Amgen) that binds to CD3 and CEA; and BAY2010112 (Bayer, Amgen) that binds to CD3 and PSMA.
- Exemplary DARTs include MGD006 (Macrogenics) that binds CD3 and CD123; and MGD007 (Macrogenics), which binds to CD3 and gpA33.
- Exemplary TandAbs include AFM11 (Affimed Therapeutics), which binds to CD3 and CD19; and AFM13 (Affimed Therapeutics) that binds to CD30 and CD16A.
- ADCs Antibody-Drug Conjugates
- the present invention relates to an antibody-drug conjugate (ADC) in which the antibody or antigen-binding fragment thereof is bound to a drug.
- ADC antibody-drug conjugate
- the anticancer drug In the antibody-drug conjugate, the anticancer drug must be stably bound to the antibody until the anticancer drug is delivered to the target cancer cell.
- the drug delivered to the target must be released from the antibody to induce the death of the target cell.
- the drug when the drug is stably bound to the antibody and released from the target cell, it must have sufficient cytotoxicity to induce the death of the target cell.
- the antibody may be coupled to the drug via a linker.
- the linker is a site that connects the anti-FGFR3 antibody and the drug, and allows the drug to be released from the antibody in a form that is cleavable under intracellular conditions, that is, in the intracellular environment, and reflects the long half-life of the antibody, allowing the antibody to circulate throughout the body It should be stable, and binding of the linker to the drug should not affect the stability and pharmacokinetics of the antibody.
- the linker may include, for example, a cleavable linker or a non-cleavable linker.
- a cleavable linker like a peptide linker, it can be cleaved by an intracellular peptidase or protease enzyme such as a lysosomal or endosomal protease, and in the case of a non-cleavable linker, e.g. a thioether linker, where the antibody is cleaved by intracellular hydrolysis.
- the drug may be released after non-selective degradation.
- the cleavable linker may include a peptide linker.
- the peptide linker has a length of at least two or more amino acids.
- dipeptides of Val-Cit, Val-Ala, or Val-Cit or Phe-Leu or Gly-Phe-Leu-Gly may be included. Examples of linkers are specifically described in WO2004/010957, which may be incorporated herein by reference.
- the antibody-drug conjugate is encapsulated into the cancer cell through the endo-lysosomal pathway after the antibody region of the ADC binds to the antigen of the target cancer cell to form the ADC-antigen complex.
- the intracellular release of the cytotoxic drug is regulated by the internal environment of the endosome/lysosome.
- the cleavable linker is pH sensitive, which may be sensitive to hydrolysis at certain pH values.
- pH sensitive linkers can be hydrolyzed under acidic conditions.
- acid labile linkers capable of being hydrolyzed in the lysosome such as hydrazones, semicarbazones, thiosemicarbazones, cis-aconitic amides, orthoesters, acetals, ketal or the like.
- the linker may be cleaved under reducing conditions, for example, a disulfide linker.
- SATA N-succinimidyl-S-acetylthioacetate
- SPDP N-succinimidyl-3-(2-pyridyldithio)propionate
- SPDB N-succinimidyl-3-(2-pyridyldithio)butyrate
- SMPT N-succinimidyl-oxycarbonyl) -alpha-methyl-alpha-(2-pyridyl-dithio)toluene
- These disulfide linkers can be cleaved by disulfide exchange with thiols of intracellular glutathione.
- the drug and/or drug-linker may be randomly conjugated via lysine of the antibody or via cysteine exposed upon reduction of a disulfide bond chain.
- the linker-drug may be bound through a genetically engineered tag, for example, a cysteine present in a peptide or protein.
- the genetically engineered tag for example, a peptide or protein, may include an amino acid motif that can be recognized by, for example, isoprenoid transferase.
- the peptide or protein has a deletion at the carboxy terminus of the peptide or protein, or has an addition through a covalent bond of a spacer unit to the carboxy (C) terminus of the peptide or protein.
- the peptide or protein may be directly covalently bonded to an amino acid motif or may be covalently bonded to a spacer unit to be linked to the amino acid motif.
- the amino acid spacer unit is composed of 1 to 20 amino acids, and among them, a glycine unit is preferable.
- the isoprenoid transferase may be, for example, farnesyl transferase (FTase, farnesyl protein transferase) or geranylgeranyl transferase (GGTase, geranylgeranyl transferase), and FTase and GGTase I are CAAX motif, GGTase II can recognize XXCC, XCXC or CXX motif, where C is cysteine, A is an aliphatic amino acid, and X is an amino acid that determines the substrate specificity of an isoprenoid transferase. have.
- FTase farnesyl transferase
- GGTase II can recognize XXCC, XCXC or CXX motif, where C is cysteine, A is an aliphatic amino acid, and X is an amino acid that determines the substrate specificity of an isoprenoid transferase. have.
- the linker may include a beta-glucuronide linker that is recognized and hydrolyzed by beta-glucuronidase, which is present in multiple numbers in lysosomes or is overexpressed in some tumor cells.
- beta-glucuronidase beta-glucuronidase
- beta-glucuronide linker disclosed in International Patent Application Publication No. WO2015/182984, for example, a beta-glucuronide linker comprising a self-immolative group may be used.
- WO2015/182984 for example, a beta-glucuronide linker comprising a self-immolative group may be used.
- the linker may be, for example, a non-cleavable linker, and the drug is released through only one step of antibody hydrolysis in the cell, for example, to produce an amino acid-linker-drug complex.
- This type of linker may be a thioether group or a maleimidocaproyl group, and may maintain stability in blood.
- the linker-drug may be bound through a cysteine exposed when the disulfide bond chain of the antibody is reduced, and the linker-drug may be bound by random linkage or by introducing an antibody terminal binding peptide having the sequence GGGGGGGCVIM.
- the drug may be bound to an antibody as an agent exhibiting a pharmacological effect, and specifically may be a chemotherapeutic agent, a toxin, micro RNA (miRNA), siRNA, shRNA or a radioactive isotope.
- the chemotherapeutic agent may be, for example, a cytotoxic agent or an immunosuppressive agent. Specifically, it may include a microtubulin inhibitor, a mitotic inhibitor, a topoisomerase inhibitor, or a chemotherapeutic agent capable of functioning as a DNA intercalator.
- it may include a drug for treating cancer, inflammation, or immune disease.
- it may include an immunomodulatory compound, an anticancer agent, an antiviral agent, an antibacterial agent, an antifungal agent, an anthelmintic agent, or a combination thereof.
- the anticancer agent is, for example, maytansinoid, auristatin (including MMAE, MMAF), aminopterin, actinomycin, bleomycin, thalisomycin, camptothecin, N8-acetyl spermidine, 1-(2 Chloroethyl)-1,2-dimethyl sulfonyl hydrazide, esperamicin, etoposide, 6-mercaptopurine, dolastatin, trichothecene, calicheamicin, taxol, taxane, paclitaxel , docetaxel, methotrexate, vincristine, vinblastine, doxorubicin, melphalan, mitomycin A, mitomycin C, chlorambucil, duocarmycin, L-asparaginase (L-asparaginase), mercaptopurine (mercaptopurine), thioguanine, hydroxyurea, cytar
- the anti-inflammatory agent is a steroid agent that reduces inflammation or swelling by binding to a glucocorticoid receptor, a non-steroidal anti-inflammatory agent (NSAIDs) that relieves pain in response to cyclic oxygenase (COX) that synthesizes prostaglandin that causes inflammation, or activation of inflammatory cells and immuno-specific anti-inflammatory drugs (ImSAIDs) that change transport and transport, but are not limited thereto.
- NSAIDs non-steroidal anti-inflammatory agent
- COX cyclic oxygenase
- ImSAIDs immuno-specific anti-inflammatory drugs
- the therapeutic agent for the immune disease may include, but is not limited to, azathioprine, chlorambucil, cyclophosphamide, cyclosporine, mycophenolate, azathioprine, or methotrexate.
- the immunosuppressant may include, but is not limited to, a calcineurin inhibitor tacrolimus, a gene synthesis inhibitor mycopheno late mofetil, or an anti-inflammatory steroid prednisone. .
- the drug is an amine, thiol, hydroxyl, hydrazide, oxime, hydrazine, thiosemicarbazone, hydrazine carboxylate, capable of reacting to form a covalent bond with an electrophilic group on the linker and linker reagent; and one or more nucleophilic groups selected from the group consisting of an arylhydrazide group.
- ADC was prepared in which the antibody or antigen-binding fragment thereof according to the present invention was linked to a drug, for example, auristatin (MMAE) through the MC-vc-PAB linker. It was confirmed that these ADCs exhibit the desired cytotoxicity.
- a drug for example, auristatin (MMAE)
- MMAE auristatin
- the present invention is a chimeric antigen receptor (CAR) comprising an extracellular domain comprising an antigen-binding site, a transmembrane domain and an intracellular signaling domain, wherein the antigen-binding site of the extracellular domain is the scFv of the antibody It relates to a chimeric antigen receptor, characterized in that.
- CAR chimeric antigen receptor
- Chimeric antigen receptors are synthetic constructs designed to induce an immune response against a target antigen and cells expressing the antigen.
- the CAR comprises an extracellular domain, a transmembrane domain and an intracellular signaling domain.
- a second-generation CAR combining a co-stimulatory domain (CD28 or CD137/4-1BB) and CD3 ⁇ was prepared to improve responsiveness to immune cells. Compared with the first-generation CAR, the number of CAR-containing immune cells remaining in the body was significantly increased.
- the second generation CAR used one auxiliary stimulation domain, whereas the third generation CAR used two or more auxiliary stimulation domains.
- a co-stimulatory domain can be combined with 4-1BB, CD28 or OX40, etc. to achieve expansion and persistence of immune cells containing CAR in vivo.
- the second-generation CAR is specifically described in U.S. Patent Nos. 7,741,465, 7,446,190 or 9,212,229, and the third-generation CAR is specifically described in U.S. Patent No. 8,822,647, which is incorporated herein by reference.
- cytokines such as IL-12 or IL-15
- the fifth-generation CAR includes interleukins to enhance immune cells. It further comprises a receptor chain such as IL-2R ⁇ .
- the fourth-generation CAR is specifically described in U.S. Patent No. 10,316,102, and the fifth-generation CAR is specifically described in U.S. Patent No. 10,336,810, which is incorporated herein by reference.
- the antigen binding site of the extracellular domain is an scFv of an antibody.
- the VH and VL domains may be linked via a linker.
- the heavy chain variable region comprising at least one amino acid sequence selected from the group consisting of SEQ ID NO: 133 to SEQ ID NO: 157, SEQ ID NO: 203 to SEQ ID NO: 215 is SEQ ID NO: 158 to SEQ ID NO: 182, SEQ ID NO: 216 to SEQ ID NO: 219 through a linker It may be linked to a light chain variable region comprising one or more amino acid sequences selected from the group consisting of.
- the linker may be a peptide linker and may have a length of about 10-25 aa.
- hydrophilic amino acids such as glycine and/or serine may be included.
- the linker may include, for example, (GS) n , (GGS) n , (GSGGS) n or (G n S) m (n and m are each 1 to 10), but the linker is, for example (G n S) m (n and m are each 1 to 10).
- the linker may include GGGGS, for example, GGGGSGGGGSGGGGS of SEQ ID NO: 185 repeated three times.
- the trans membrane domain may be derived from a natural or synthetic source. When the source is natural, the domain may be derived from any membrane bound protein or trans membrane protein.
- the transmembrane domain is the T-cell receptor, CD28, CD3 epsilon, CD45, CD4, CD5, CD8, CD9, CD16, CD22, CD33, CD37, CD64, CD80, CD86, CD134, CD137, CD154, ICOS alpha, beta or zeta chains.
- hydrophobic residues such as leucine and valine may be included, or a peptide including phenylalanine, tryptophan, and valine may be included at each end.
- a short oligo- or polypeptide linker of 2 to 10 amino acids in length can form a bond between the trans membrane domain and the cytoplasmic signaling domain of the CAR.
- a glycine-serine peptide may be used as a linker.
- the signal transduction domain can induce activation of the normal effector function of the immune cell in which the CAR is located. For example, it can induce cytolytic activation or helper activation through the secretion of cytokines.
- the signaling domain may comprise a truncated fragment of an intracellular signaling domain sufficient to transduce an effector function signal.
- the cytoplasm of the T cell receptor (TCR) and the co-receptor, which act in concert to initiate signal transduction after antigen receptor engagement with the signal transduction domain, may be included.
- Primary cytoplasmic signaling sequences regulate primary activation of the TCR complex in a stimulatory or inhibitory manner.
- Primary cytoplasmic signaling sequences that act in a stimulatory manner may contain a signaling motif known as an immunoreceptor tyrosine-based activation motif or ITAM.
- ITAMs containing primary cytoplasmic signaling sequences may include TCR zeta, FcR gamma, FcR beta, CD3 gamma, CD3 delta, CD3 epsilon, CD5, CD22, CD79a, CD79b, and CD66d.
- the cytoplasmic domain of the CAR may include a CD3 zeta chain portion and a costimulatory signaling region.
- a costimulatory signaling region refers to a portion of a CAR comprising the intracellular domain of a costimulatory molecule.
- CD27, CD28, 4-1BB (CD137), OX40, CD30, CD40, PD-1, ICOS, Lymphocyte Function-Related Antigen-1 (LFA-1), CD2, CD7, LIGHT, NKG2C, B7- H3, and a ligand that specifically binds to CD83, and the like may be included.
- Cytoplasmic signaling sequences within the cytoplasmic signaling portion of the CAR may be linked via a peptide linker comprising 2 to 10 amino acids, eg, glycine-serine.
- the present invention relates to an immune cell into which the chimeric antigen receptor (CAR) is introduced.
- CAR chimeric antigen receptor
- the immune cells are capable of inducing immunity to induce a desired cancer therapeutic effect, for example, T cells, NK cells, cytokine-induced killer cells (CIK), activated cytotoxic T lymphocytes (Cytotoxic).
- T Lymphocyte, CTL cytokine-induced killer cells
- macrophages cytotoxic T lymphocytes
- TIL tumor tissue infiltrating Lymphocytes
- a chimeric antigen receptor (CAR) in which an scFv for an antibody other than the anti-FGFR3 antibody is included as an antigen-binding site of an extracellular domain may be additionally introduced.
- Antibodies other than the anti-FGFR3 antibody include, for example, PD-1, PD-L1, BTLA, CTLA-4, VISTA, LAG3, TIM3, CD137 (4-1BB), VISTA, CD258 (LIGHT), TIGIT, CD134 ( OX40), CD28, CD278 (ICOS), CD27, CD154 (CD40L), CD357 (GITR), CD30, DR3, CD226 (DNAM1), CD96, CD200, CD200R, Transferrin receptor, c-Met, EGFR, HER2, KDR, It may be an antibody or antigen-binding fragment thereof targeting one or more selected from the group consisting of PDGFRa, NRP1, and MARCO.
- the present invention relates to an endoplasmic reticulum in which an antibody or antigen-binding fragment thereof is expressed outside or is present therein.
- the endoplasmic reticulum includes a vecyclo, a cell membrane, and an antibody or antigen-binding fragment thereof according to the present invention that can pass through a cell membrane and directly introduce a target protein into a cell.
- the endoplasmic reticulum according to the present invention may be in a form including a cell membrane and a target agent to be delivered.
- An example of such an endoplasmic reticulum is specifically described in US Patent Publication No. 2018/0177725, and may be incorporated herein by reference.
- the endoplasmic reticulum may have, for example, an average diameter of 40-500 nm, specifically 100-300 nm, 80-200 nm or 100 nm.
- the endoplasmic reticulum may be, for example, about 100, 200, 300, 400 or 500 nm.
- the endoplasmic reticulum may not contain other intracellular organelles such as mitochondria, lysosomes, or Golgi bodies in addition to the cell membrane and the antibody or antigen-binding fragment thereof according to the present invention.
- the endoplasmic reticulum can be divided into internal and external including a membrane, and the antibody or antigen-binding fragment thereof is present in the membrane and expressed to the outside, or expressed inside, or separated from the membrane and can exist inside the ER.
- the membrane of the endoplasmic reticulum may vary depending on the target to which the antibody or antigen-binding fragment thereof is to be applied, and for delivery to cancer cells expressing FGFR3 to which the antibody or antigen-binding fragment thereof according to the present invention binds, for example, it may be a cancer cell membrane.
- the present invention is not limited thereto.
- the cancer cells are, for example, Hodgkin's lymphoma, non-Hodgkin's lymphoma (eg, B-cell lymphoma, diffuse large B-cell lymphoma, follicular lymphoma, chronic lymphocytic leukemia, mantle cell lymphoma, marginal zone B-cell lymphoma, Burkitt's lymphoma) , lymphoid cell lymphoma, hairy cell leukemia), acute myeloid leukemia, chronic myelogenous leukemia, myelodysplastic syndrome, multiple myeloma, or acute lymphocytic leukemia-causing cancer cells.
- non-Hodgkin's lymphoma eg, B-cell lymphoma, diffuse large B-cell lymphoma, follicular lymphoma, chronic lymphocytic leukemia, mantle cell lymphoma, marginal zone B-cell lymphoma, Burkitt's lymphoma
- solid cancers such as ovarian cancer, rectal cancer, stomach cancer, testicular cancer, anal region cancer, uterine cancer, colon cancer, rectal cancer, renal cell carcinoma, liver cancer, non-small cell carcinoma of the lung, small intestine cancer, esophageal cancer, melanoma, Kaposi's sarcoma, Endocrine cancer, thyroid cancer, parathyroid cancer, adrenal cancer, bone cancer, pancreatic cancer, skin cancer, head and neck cancer, skin or intraocular malignant melanoma, uterine cancer, brain stem glioma, pituitary adenocarcinoma, epidermal cancer, carcinoma of the squamous cell carcinoma of the cervix, fallopian tubes Carcinoma, endometrial carcinoma, vaginal carcinoma, soft tissue sarcoma, urethral cancer, vulvar carcinoma, penile cancer, bladder cancer, kidney or ureter cancer, renal pelvic carcinoma, spinal tumor, neoplasm of central nervous system (CNS), primary C
- glioblastoma lung cancer, bladder cancer, oral cancer, head and neck squamous cell cancer, gallbladder cancer or cervical cancer causing cancer cells.
- the endoplasmic reticulum may be, for example, an exosome.
- the exosome refers to a small vesicle having a membrane structure with a size of 50 - 200 nm that is secreted out of the cell with proteins, DNA, RNA, etc. for signal transduction between cells.
- Exosomes contain various proteins, DNA, RNA, etc. in the cell. Substances contained in these exosomes and secreted out of the cell are re-introduced into other cells by fusion or endocytosis with the cell membrane and serve as a communicator between cells. In addition, it can be used to diagnose a specific disease by analyzing the substances contained in the exosome and secreted out of the cell.
- the antibody or antigen-binding fragment thereof is expressed outside the exosome or is present therein.
- the exosome has a membrane structure, so that the inside and outside can be distinguished, and the antibody or antigen-binding fragment thereof exists in the exosome membrane and is expressed to the outside, expressed inside, or separated from the membrane and exo It may exist in some.
- exosomes are loaded with specific drugs on artificial exosomes derived from immune cells/stem cells having various targeting properties and targeted and delivered to desired lesion tissues in the human body. It may also be in a form that can maximize therapeutic efficacy, and is specifically described in, for example, International Patent Publication No. WO2011/002239, which is incorporated herein by reference.
- the antibody or antigen-binding fragment thereof When the antibody or antigen-binding fragment thereof is present in the exosome membrane and expressed externally or internally, the antibody or antigen-binding fragment thereof is expressed in a form fused to an exosome-specific marker, and the antibody or Its antigen-binding fragment can be captured.
- the exosome membrane is fused to the cell membrane of a cell in which FGFR3 is expressed, the antibody or antigen-binding fragment thereof may be delivered to the cell.
- the antibody or antigen-binding fragment thereof may be displayed on the surface of the exosome.
- a PTGFRN Prostaglandin F2 Receptor Negative Regularator
- another target protein may be fused to the PTGFRN protein.
- exosomes containing the antibody or antigen-binding fragment thereof it can be prepared by temporarily binding the antibody or antigen-binding fragment thereof with the marker protein using a photospecific binding protein.
- the target protein may be trapped inside the exosome in a state in which it is not bound to the membrane.
- the exosome When the exosome is delivered into the cell by internalization, the exosome may be degraded and the antibody or antigen-binding fragment thereof may be delivered to the cell.
- photospecific binding proteins CIBN and CRY2 may be used, and specifically, the CIBN is expressed in a fused form with CD9, one of the marker proteins, and the CRY2 is the antibody or antigen-binding fragment thereof. Genes encoding these fusion proteins can be introduced into exosome-producing cells so that they are expressed in a fused form.
- the CIBN-CD9 fusion protein expressed in the exosome-producing cells is included in the exosome due to CD9.
- the target protein expressed in the exosome-producing cells-CRY2 fusion protein Since the CRY2 domain of CRY2 is bound to the CIBN domain fused to CD9, a reversibly induced fusion protein in the form of the target protein-CRY2-CIBN-CD9 is formed, and such a fusion protein can be included in the exosome due to CD9.
- the exosome containing the target protein is produced, if the blue LED light is no longer irradiated, the CIBN-CRY2 binding is released, and the target protein is not bound to the cell membrane of the exosome. can be included inside.
- the present invention provides an antibody or antigen-binding fragment thereof, a bi- or multispecific antibody comprising the antibody or antigen-binding fragment thereof, an antibody-drug conjugate comprising the antibody or antigen-binding fragment thereof, the antibody or It relates to a composition for treating cancer, inflammation or an immune disease, comprising a chimeric antigen receptor comprising an antigen-binding fragment thereof or an immune cell comprising the chimeric antigen receptor.
- the present invention includes, for example, (a) an antibody or antigen-binding fragment thereof against FGFR3 according to the present invention, a bi- or multispecific antibody comprising the antibody or antigen-binding fragment thereof, the antibody or antigen-binding fragment thereof a pharmaceutically effective amount of an antibody-drug conjugate, a chimeric antigen receptor comprising the antibody or antigen-binding fragment thereof, or an immune cell comprising the chimeric antigen receptor; And (b) it may be a pharmaceutical composition for the prevention or treatment of cancer comprising a pharmaceutically acceptable carrier.
- the present invention also provides an antibody or antigen-binding fragment thereof against FGFR3 according to the present invention, a bi- or multispecific antibody comprising the antibody or antigen-binding fragment thereof, and an antibody-drug conjugate comprising the antibody or antigen-binding fragment thereof , It may be a method for preventing or treating cancer comprising administering to a cancer patient a chimeric antigen receptor comprising the antibody or antigen-binding fragment thereof or an immune cell comprising the chimeric antigen receptor.
- Prevention means any action that inhibits the growth or delays the progression of cancer by administration of the composition according to the present invention
- treatment means inhibition of cancer development, alleviation of tumor or elimination of cancer.
- the cancer is, for example, Hodgkin's lymphoma, non-Hodgkin's lymphoma (eg, B-cell lymphoma, diffuse large B-cell lymphoma, follicular lymphoma, chronic lymphocytic leukemia, mantle cell lymphoma, marginal area B-cell lymphoma, Burkitt's lymphoma) , lymphoid cell lymphoma, hairy cell leukemia), acute myeloid leukemia, chronic myelogenous leukemia, myelodysplastic syndrome, multiple myeloma, or acute lymphocytic leukemia.
- non-Hodgkin's lymphoma eg, B-cell lymphoma, diffuse large B-cell lymphoma, follicular lymphoma, chronic lymphocytic leukemia, mantle cell lymphoma, marginal area B-cell lymphoma, Burkitt's lymphoma
- Said cancer is, for example, ovarian cancer, rectal cancer, stomach cancer, testicular cancer, anal region cancer, uterine cancer, colon cancer, rectal cancer, renal cell carcinoma, liver cancer, non-small cell carcinoma of the lung, small intestine cancer, esophageal cancer, melanoma, Kaposi's sarcoma, Endocrine cancer, thyroid cancer, parathyroid cancer, adrenal cancer, bone cancer, pancreatic cancer, skin cancer, head and neck cancer, skin or intraocular malignant melanoma, uterine cancer, brain stem glioma, pituitary adenocarcinoma, epidermal cancer, carcinoma of the squamous cell carcinoma of the cervix, fallopian tubes Carcinoma, endometrial carcinoma, vaginal carcinoma, soft tissue sarcoma, urethral cancer, vulvar carcinoma, penile cancer, bladder cancer, kidney or ureter cancer, renal pelvic carcinoma, spinal tumor, neoplasm of central nervous system (CNS
- the cancer may be, for example, glioblastoma, lung cancer, bladder cancer, oral cancer, head and neck squamous cell cancer, gallbladder cancer or cervical cancer.
- the antibody or antigen-binding fragment thereof is a barrier formed by a tight junction in the capillary endothelial cell membrane of the brain that exists between the brain and spine and the surrounding circulatory system, the blood-brain barrier (blood-brain barrier). barrier) needs to be passed. It can be used in conjunction with a transporter to cross the BBB.
- a method of disrupting the osmotic pressure of the BBB by using a method such as bradkinin or HIFU (Hign density fucues ultrasound). It may also include the use of delivery systems such as receptor-mediated transcytosis of glucose and amino acid transporters, insulin or transferrin, or blocking the active efflux transporter of glycoproteins in cells.
- a method such as bradkinin or HIFU (Hign density fucues ultrasound). It may also include the use of delivery systems such as receptor-mediated transcytosis of glucose and amino acid transporters, insulin or transferrin, or blocking the active efflux transporter of glycoproteins in cells.
- the inflammation is, for example, chronic obstructive pulmonary disease, chronic digestive disorder, conjunctivitis, otitis, allergic rhinitis, gingivitis, tongue needles, bronchitis, gastroesophageal reflux disease (GERD), esophagitis, gastritis, enteritis, peptic ulcer, inflammatory bowel disease. disease (IBD), Crohn's disease, irritable bowel syndrome (IBS), enteritis or allergy, urethritis, cystitis, vaginitis, proctitis, eosinophilic gastroenteritis, or rheumatoid arthritis, but is not limited thereto.
- the immune disease may be, for example, acquired immunodeficiency, autoimmune disease, systemic lupus erythematosus, scleroderma, Sjogren's syndrome, polymyositis and dermatomyositis, polymyalgia rheumatica, temporal arteritis, polyarteritis nodosa, or Behcet's syndrome, and the like.
- compositions of the present invention are commonly used in formulation, and include lactose, dextrose, sucrose, sorbitol, mannitol, starch, acacia gum, calcium phosphate, alginate, gelatin, calcium silicate. , microcrystalline cellulose, polyvinylpyrrolidone, water, syrup, methyl cellulose, methylhydroxybenzoate, propylhydroxybenzoate, talc, magnesium stearate, and mineral oil.
- the composition of the present invention may further include a lubricant, a wetting agent, a sweetening agent, a flavoring agent, an emulsifying agent, a suspending agent, a preservative, and the like, in addition to the above components.
- the pharmaceutical composition of the present invention may be administered orally or parenterally, and in the case of parenteral administration, intravenous injection, subcutaneous injection, intramuscular injection, intraperitoneal injection, endothelial administration, topical administration, intranasal administration, intrapulmonary administration and rectal administration etc. can be administered.
- parenteral administration intravenous injection, subcutaneous injection, intramuscular injection, intraperitoneal injection, endothelial administration, topical administration, intranasal administration, intrapulmonary administration and rectal administration etc. can be administered.
- the protein or peptide When administered orally, the protein or peptide is digestible and therefore oral compositions should be formulated to coat the active agent or to protect it from degradation in the stomach.
- the pharmaceutical composition may be administered by any device capable of transporting the active agent to a target cell.
- a suitable dosage of the composition according to the present invention varies depending on factors such as formulation method, administration mode, age, weight, sex, pathological condition, food, administration time, administration route, excretion rate and reaction sensitivity of the patient, usually Thus, a skilled physician can easily determine and prescribe an effective dosage for the desired treatment or prevention.
- the daily dosage of the pharmaceutical composition of the present invention is 0.0001-100 mg/kg.
- the term “pharmaceutically effective amount” refers to an amount sufficient to prevent or treat cancer or autoimmune disease.
- the pharmaceutical composition of the present invention is prepared in unit dosage form by formulating using a pharmaceutically acceptable carrier and/or excipient according to a method that can be easily carried out by a person of ordinary skill in the art to which the present invention pertains. or may be prepared by incorporation into a multi-dose container.
- the formulation may be in the form of a solution, suspension, or emulsion in oil or aqueous medium, or may be in the form of an extract, powder, suppository, powder, granule, tablet, or capsule, and may additionally include a dispersant or stabilizer.
- the present invention relates to a composition for combination therapy comprising an immune cell and a drug other than an anti-FGFR3 antibody.
- the drug other than the anti-FGFR3 antibody may include a chemotherapeutic agent or an antibody other than the anti-FGFR3 antibody.
- drugs include maytansinoids, auristatin (including MMAE, MMAF), aminopterin, actinomycin, bleomycin, thalisomycin, camptothecin, N8-acetyl spermidine, 1-(2 chloroethyl)- 1,2-dimethyl sulfonyl hydrazide, esperamicin, etoposide, 6-mercaptopurine, dolastatin, tricotecene, calicheamicin, taxol, taxane, paclitaxel, docetaxel ), methotrexate, vincristine, vinblastine, doxorubicin, melphalan, mitomycin A, mitomycin C, chlorambucil, duocarmycin, L-asparaginase (L-asparaginase), mercaptopurine, Thioguanine, hydroxyurea, cytarabine, cyclophosphamide, ifosf
- the antibody other than the anti-FGFR3 antibody is, for example, PD-1, PD-L1, BTLA, CTLA-4, VISTA, LAG3, TIM3, CD137 (4-1BB), VISTA, CD258 (LIGHT). ), TIGIT, CD134 (OX40), CD28, CD278 (ICOS), CD27, CD154 (CD40L), CD357 (GITR), CD30, DR3, CD226 (DNAM1), CD96, CD200, CD200R, Transferrin receptor, c-Met, It may be an antibody or antigen-binding fragment thereof that targets at least one selected from the group consisting of EGFR, HER2, KDR, PDGFRa, NRP1, and MARCO.
- the present invention relates to a composition for combination therapy comprising an antibody or antigen-binding fragment thereof and at least one selected from the group consisting of the following.
- immune cells comprising an antigen receptor (CAR) comprising an scFv for an antibody other than an anti-FGFR3 antibody as an extracellular domain; and
- CAR antigen receptor
- composition for combination therapy comprising the above immune cell engaging bispecific or multispecific antibody and at least one selected from the group consisting of:
- immune cells comprising an antigen receptor (CAR) comprising an scFv fragment for an antibody other than an anti-FGFR3 antibody as an extracellular domain; and
- CAR antigen receptor
- the immune cells may induce a desired cancer therapeutic effect by inducing immune treatment, for example, immunity, for example, T cells, NK cells, cytokine-induced killer cells (Cytokine Induced Killer cells, CIK), activated cells Cytotoxic T lymphocytes (CTL), macrophages, tumor tissue infiltrating T cells (Tumor-Infiltrating Lymphocytes, TIL), may be selected from the group consisting of dendritic cells, but is not limited thereto.
- immunity for example, T cells, NK cells, cytokine-induced killer cells (Cytokine Induced Killer cells, CIK), activated cells Cytotoxic T lymphocytes (CTL), macrophages, tumor tissue infiltrating T cells (Tumor-Infiltrating Lymphocytes, TIL)
- TIL tumor tissue infiltrating Lymphocytes
- the antibody other than the anti-FGFR3 antibody is an antibody that targets a target other than FGFR3, for example, LAG3, TIM3, CD137 (4-1BB), VISTA, CD258 (LIGHT), TIGIT, CD134 (OX40), CD28, CD278 (ICOS), CD27, CD154 (CD40L), CD357 (GITR), CD30, DR3, CD226 (DNAM1), CD96, CD200, CD200R, Transferrin receptor, c-Met, EGFR, HER2, KDR, PDGFRa, NRP1, or MARCO It may be an antibody or antigen-binding fragment thereof that binds to, but is not limited thereto.
- the present invention relates to a composition for combination therapy comprising an antibody or antigen-binding fragment thereof and at least one selected from the group consisting of the following.
- immune cells comprising an antigen receptor (CAR) comprising an scFv for an antibody other than an anti-FGFR3 antibody as an extracellular domain; and
- CAR antigen receptor
- composition for combination therapy comprising the above immune cell engaging bispecific or multispecific antibody and at least one selected from the group consisting of:
- immune cells comprising an antigen receptor (CAR) comprising an scFv fragment for an antibody other than an anti-FGFR3 antibody as an extracellular domain; and
- CAR antigen receptor
- the immune cells may induce a desired cancer therapeutic effect by inducing immune treatment, for example, immunity, for example, T cells, NK cells, cytokine-induced killer cells (Cytokine Induced Killer cells, CIK), activated cells Cytotoxic T lymphocytes (CTL), macrophages, tumor tissue infiltrating T cells (Tumor-Infiltrating Lymphocytes, TIL), may be selected from the group consisting of dendritic cells, but is not limited thereto.
- immunity for example, T cells, NK cells, cytokine-induced killer cells (Cytokine Induced Killer cells, CIK), activated cells Cytotoxic T lymphocytes (CTL), macrophages, tumor tissue infiltrating T cells (Tumor-Infiltrating Lymphocytes, TIL)
- TIL tumor tissue infiltrating Lymphocytes
- the antibody other than the anti-FGFR3 antibody is an antibody that targets a target other than FGFR3, for example, LAG3, TIM3, CD137 (4-1BB), VISTA, CD258 (LIGHT), TIGIT, CD134 (OX40), CD28, CD278 (ICOS), CD27, CD154 (CD40L), CD357 (GITR), CD30, DR3, CD226 (DNAM1), CD96, CD200, CD200R, Transferrin receptor, c-Met, EGFR, HER2, KDR, PDGFRa, NRP1 , or may be an antibody or antigen-binding fragment thereof that binds to MARCO, but is not limited thereto.
- the immune checkpoint inhibitor refers to an agent capable of inducing T cell activation by blocking the T cell suppression signal at a site where antigen presenting cells (APCs) and immune cells, for example, T cells meet.
- the immune checkpoint inhibitor is, for example, PD-1, PD-L1, BTLA, CTLA-4, VISTA, LAG3, TIM3, CD137 (4-1BB), CD258 (LIGHT), TIGIT, CD134 (OX40), CD28, It may be a drug targeting CD278 (ICOS), CD27, CD154 (CD40L), CD357 (GITR), CD30, DR3, CD226 (DNAM1), CD96, CD200, or CD200R, but is not limited thereto.
- Each of the first component and the second component to be administered in combination may be administered simultaneously.
- each of the first component and the second component to be administered in combination may be administered separately at a predetermined time interval.
- the second component may be separately administered before or after administration of the first component among the subject of the combined administration.
- Companion diagnostics is a type of molecular diagnostic technique for predicting the patient's responsiveness to a specific drug treatment. Considering the sensitivity, it is possible to present a standard that allows the treatment of a drug suitable for the patient.
- the fusion gene of FGFR3 and TACC3 is amplified, there is a mutation in the fusion gene, the fusion gene is overexpressed, or the fusion gene is always expressed (constitutive activation) for treating cancer identified as, An antibody or antigen-binding fragment thereof, a dual or multispecific antibody comprising the antibody or antigen-binding fragment thereof, an antibody-drug conjugate, a chimeric antigen receptor or a composition for cancer treatment comprising immune cells comprising the chimeric antigen receptor is about
- the present invention also provides that the fusion gene of FGFR3 and TACC3 is amplified in a patient-derived sample, there is a mutation in the fusion gene, the fusion gene is overexpressed, or when it is confirmed that the fusion gene is always expressed (constitutive activation), the antibody or A cancer treatment method comprising administering an antigen-binding fragment thereof, a bi- or multispecific antibody comprising the antibody or antigen-binding fragment thereof, an antibody-drug conjugate, a chimeric antigen receptor, or an immune cell comprising the chimeric antigen receptor is about
- the sample refers to a biological subject obtained from a tissue or body fluid of a patient.
- Sources of tissue samples include solid tissue, such as those derived from frozen and/or preserved organs, tissue samples, biopsies, or aspirates; blood or any blood component (eg, serum, plasma); bone marrow or any component of bone marrow; It can be body fluids such as urine, cerebrospinal fluid, whole blood, plasma and serum.
- a sample may comprise a non-cellular fraction (eg, urine, plasma, serum or other non-cellular body fluid).
- a sample may include a bodily fluid, such as blood (eg, whole blood).
- the sample may be a whole blood sample, a whole bone marrow sample, a whole peripheral blood sample, or a whole tumor sample obtained from a patient.
- the "pre" sample is a sample that is substantially free of components (eg, cells) that have been removed or isolated from the sample.
- the sample eg, a blood sample
- a “pre” sample such as a whole tissue sample or a whole tumor sample, substantially retains the microenvironment from the tissue of origin, eg, may substantially retain the structure of the tumor or immune microenvironment.
- a sample, such as a tumor sample can be processed (eg, triturated, minced, blended, milled, etc.) into smaller pieces and diluted (eg, with a physiologically compatible buffer or medium).
- Confirmation of expression of the gene is a process of confirming the presence and level of expression of the gene, and may be performed by polymerase chain reaction (PCR), and in some cases transcription polymerase reaction (RT-PCR), competitive reverse transcription polymerization Competitive RT-PCR, Real-time RT-PCR, RNase protection assay (RPA), Northern blotting, can be performed using a DNA chip.
- PCR polymerase chain reaction
- RT-PCR transcription polymerase reaction
- RPA RNase protection assay
- Northern blotting can be performed using a DNA chip.
- PCR Polymerase chain reaction
- Multiplex PCR real-time PCR, differential display PCR (DD-PCR), rapid amplification of cDNA ends (RACE), inverse polymerase chain reaction chain reaction: IPCR), vectorette PCR, and thermal asymmetric interlaced PCR (TAIL-PCR) may be performed.
- DD-PCR differential display PCR
- RACE rapid amplification of cDNA ends
- IPCR inverse polymerase chain reaction chain reaction chain reaction
- TAIL-PCR thermal asymmetric interlaced PCR
- Immunoelectrophoresis tissue immunostaining, Immunoprecipitation Assay, Complement Fixation Assay, Fluorescence Activated Cell Sorter (FACS), a method using a protein chip, etc. may be included. .
- Example 1 Selection of phage antibodies specific for FGFR3, cell panning (phage display technology)
- FGFR3 overexpressing cells (682T) and FGFR3 underexpressing cells (626T) were verified through RPKM analysis values and protein expression confirmation through western blotting, and the corresponding cells were selected.
- the previously recovered phage library stock was treated with FGFR3 low-expressing cells and allowed to react at 4°C for 1 hour, then only the supernatant was recovered through a centrifuge and treated with FGFR3 overexpressing cells prepared in advance, followed by reaction at 4°C for 1 hour.
- the non-specific phage was removed through the culture medium and cultured at 37°C for 30 minutes to recover the cell-internalized antibody.
- the recovery method is to remove non-specific cell surface binding phage by washing with low pH buffer and then lysing the cells through lysis buffer to recover the antibody with cell internalization function through FGFR3-specific binding inside the cell. infected with .coli. Infected e.coli was amplified again, and the same cell panning method was additionally performed twice, and cell panning was performed three times in total, followed by ELISA screening to select FGFR3-specific antibodies. A schematic diagram of the experiment is shown in [Fig. 1a].
- Example 2 Selection of phage antibodies specific for FGFR3, antigen immobilization panning (phage display technology)
- FGFR3-IIIc/Fc antigen and negative/Fc antigen were coated on the immune-tube with 3ug/ml each (overnight, 4 degrees), and the recovered phage library stock was first reacted with pre-blocked negative/Fc antigen at room temperature for 1 hour. . After that, the supernatant was recovered and reacted in a pre-blocked FGFR3-IIIc/Fc tube at room temperature for 1 hour. After removing non-specific phages through washing with PBST, phages specific for FGFR3-lllc/Fc antigen were recovered through a low pH buffer.
- Example 3 Selection of phage antibodies specific for FGFR3, magnetic bead panning; Semi-automated panning (phage display technology)
- Magnetic beads-based panning which is a method that processes phage to the biotinylated target antigen in a manual method that has been conventionally used, undergoes a binding process, and then washes and recovers antigen-specific phage using a column or magnetic chamber.
- the present inventors proceeded by introducing this series of processes into a semi-automated system.
- Reagents such as phage library stock, biotinylated FGFR3-IIIc/Fc antigen, streptavidin-M280 dynabeads, 0.1% PBST wash buffer, and elution buffer are dispensed into Kingfisher Flex (Thermo scientific) instrument in Kingfisher Flex 24 deep wells and pre-made software Bio-panning was performed through the protocol (BindItTM Software) [Fig. 1d].
- the phage that specifically binds to the FGFR3 antigen was amplified and recovered by repeating bio-panning 3 to 4 times. Using this, ELISA screening was performed to select FGFR3-specific antibodies.
- each bio-panning method is the e.coli host cell (TG1) state, which was obtained by smearing them on Agar LB/Ampicillin medium as a single clone, and optionally inoculated into SB/ampicillin culture medium and cultured (3 hours, 37 hours). do). Then, for induction of scFv-pIII protein, each well was treated with IPTG at a final concentration of 1 mM and cultured at 30°C overnight.
- TG1 e.coli host cell
- 1x TES solution 20% w/v sucrose, 50 mM Tris, 1 mM EDTA, pH 8.0
- the scFv-pIII protein present in the periplasmic region of e. coli was extracted by additionally treating with 0.2x TES solution and suspending for more than 2 hours.
- each plate was treated with scFv-pIII extracted from FGFR3 recombinant protein and negative recombinant protein in a 96-well plate at 1 ug/ml overnight, at 4°C, and reacted at room temperature for 1 hour. After the reaction, washing was carried out through PBST, and the HRP-conjugated anti-HA antibody was treated for 1 hour and then washed again to induce a color reaction (TMB substrate) to measure the O.D value (450 nm).
- TMB substrate color reaction
- FGFR3-specific scFv-pIII clones were selected. Selection criteria were converted into relative ratios (positive / negative), and antibody sequence analysis was performed on clones with values of 2 or more.
- ELISA screening was performed by taking 564 single clones for the completed output phages, and 10 positive clones were identified among them [Fig. 2a].
- ELISA screening was performed for each 658 single clones in two separate experiments (a total of 1,316), and 328 positive clones were identified among them [Fig. 2b]. After the magnetic-based semi-automatic bio-panning was completed, 376 clones were screened by ELISA, and 26 positive clones were identified [Fig. 2c].
- an IgG production vector was constructed by cloning into the heavy chain production vector and light chain production vector owned by our research team. Based on the constructed production vector, FGFR3 antibody was produced using the mammalian protein expression system (Expi293F), and high-purity antibody was recovered and purified using MabSelect SuReTM, an affinity chromatography column, based on AKTA prime plus equipment. The finished sample was analyzed for high-purity sample characteristics based on SDS-PAGE and size-exclusion chromatography HPLC (SEC-HPLC) analysis ( FIGS. 3a and 3b ).
- Example 7 Evaluation of antigen binding ability of FGFR3 antibody; ELISA
- Affinity ELISA was performed to confirm the binding ability of the produced antibody (IgG) to the FGFR3 antigen.
- a 96-well plate was coated with FGFR3 antigen at 1 to 2 ug/ml (4 degrees, overnight), followed by blocking with 3% skim milk (PBS) (room temperature, 1 hour). After that, the previously serially diluted antibody samples were treated with duplicate and triplicate and reacted at room temperature for 1 hour. After washing with PBST 2-3 times, the HRP-conjugated anti-human Fab antibody was diluted in skim milk and treated (room temperature, 1 hour), washed again with PBST, and a color reaction (TMB substrate) was performed. . Then, the value was confirmed by measuring with O.D 450nm.
- SPR analysis was performed to evaluate the binding ability of the produced antibody (IgG) to the FGFR3 subtype and subfamily.
- the SRP-based affinity measurement of the FGFR3 antibody candidates for the FGFR3 antigen was performed using a Biacore-T200 instrument.
- the same antigens as described in ELISA binding capacity were directly immobilized on a CM5 biosensor chip through amine coupling to achieve approximately 300RU.
- Serial dilutions at a concentration of approximately 20 nM were sequentially injected (25 degrees) at a flow rate of 30 ug/min for a binding time of 180 seconds, and then the separation step was performed at the same flow rate for 180 seconds.
- the CM5 biosensor chip was regenerated by injecting 10 mM glycine-HCl as buffer between each injection. Association rates and dissociation rates were calculated using a one-to-one Langmuir association model. The equilibrium dissociation constant (KD) was calculated as the ratio Koff/Kon. (Fig. 5, Table 6)
- Example 9 FGFR3 protein expression level confirmation; Western blotting, FACS analysis
- 682T and 526T patient-derived cells were identified as FGFR3-overexpressing cells.
- 626T and 559T were confirmed to have little FGFR3 expression.
- the same pattern was verified in the FACS results.
- 682T cells are considered to have a very high level of FGFR3 expression on the cell surface (FIG. 6a).
- FGFR3 was overexpressed, amplified, mutated, and fused in various carcinomas. Among them, it has been reported that patients with FGFR3-TACC3 fusion have poor prognosis in bladder cancer and brain tumors. Therefore, the treatment for this has the potential to overcome the unmet medical demand. Therefore, in the present invention, patient-derived cells were grouped based on FGFR3-TACC3 fusion analysis, and this was confirmed using RT-PCR technique. After proliferating patient-derived cells GBM15-682T, GBM14-526T, BT16-1154T, GBM14-606T, and NS10-783T through subculture, a certain amount was recovered and RNA was extracted using RNeasy Mini Kit (Qiagen).
- RT-PCR Superscript IV Reverse transcriptase was performed to synthesize cDNA.
- the fusion site studied was confirmed using the UCSC genome browser and primers were prepared to recognize the FGFR3-TACC3-specific region (FW: 5'-TGATCATGCGGGAGTGCTG-3', RV: 5'-CTCCTCACACCTGCTCCTC-3'). It was confirmed whether the FGFR3-TACC3 fusion-specific region was amplified through PCR experiments on cDNA using the prepared primer. At the same time, GAPDH was also confirmed as a control.
- GBM15-682T, GBM14-526T, and BT16-1154T were confirmed as FGFR3-TACC3 fusion (PCR expected size, 400 ⁇ 500bp).
- GBM15-682T and GBM14-526T are expected to be the same fusion
- BT16-1154T is expected to be a different fusion [Fig. 6b].
- the characteristics and anticancer effects of additional FGFR3 antibody clones were analyzed based on FGFR3-TACC3 fusion brain tumor patient-derived cells.
- FACS analysis was performed to confirm the binding ability of the excavated antibody to the FGFR3-TACC3 overexpressing patient-derived cells identified in the present invention.
- Each cell was divided into 3.0-5.0E+05 cells/tube, and after performing a washing (PBS) step, 100-200 nM of the excavated antibody was treated at 4 degrees. After that, after removing the non-adhered antibody sample through the same washing method, the antibody attached to the cell surface was treated with anti-human alexa-488 conjugate (Catalog # A-11013, Invitrogen) antibody to BD FACSAriaTM III (BD Biosciences). ) to confirm cell surface binding ability.
- the excavated antibodies showed cell-binding ability of different affinities (FIG. 7a).
- the cell surface binding ability according to the concentration was analyzed for the F309 clone under the same conditions, and it was confirmed that the cell surface binding ability was proportional to the concentration, thereby verifying the presence of the FGFR3-specific binding ability ( FIG. 7b ). For the cell line in which FGFR3 was not expressed, it was further confirmed that there was no binding (Fig. 7c).
- Example 12 Evaluation of target resolution of FGFR3 antibody; FACS
- FGFR3 target resolution of the candidate antibodies discovered in the present invention was screened through FACS.
- GBM15-682T patient-derived cells which are FGFR3-overexpressing cells, were subcultured and seeded at 3.0E+05 cells/tube, and each candidate antibody was treated with 40ug/ml (2 hours, 37°C).
- FGFR3-PE FAB766P, R&D
- BD FACSAriaTM III BD Biosciences
- Comparative analysis was performed based on the geomean value compared to the IgG control.
- the cell surface FGFR3 decomposition ability of the excavated antibody according to time was confirmed by treating the antibody for each hour (4 hours, 2 hours, 1 hour, 30 minutes, 15 minutes). The same was done in the KMS11 cell line.
- FGFR3 consists of three domains, each domain (FGFR3 Ig domain I, domain II, domain III) is attached with an Fc tag to analyze the FGFR3 binding domain of the excavated antibody.
- purified Fig. 9c. Analysis of the binding capacity of the antibody to the purified domain was performed in the same manner as the ELISA described above, and after coating at 1 ug/ml, the antibody was treated and measured by inducing a TMB color reaction. F309 and FS306 clones were confirmed to specifically bind to FGFR3 domain 1 ( FIG. 9b ).
- Comparative antibodies B701 (Vofatamab, Rainier Therapeutics) and D11 (LY3076226, Eli Lilly) were confirmed to bind between domains 2 and 3 as reported in the literature. However, the epitope of the comparative antibody is included in domain 2, which was performed in the present invention. In addition, it has been reported that ligands such as FGFR3, FGF1, and FGF9 bind to Ig domain II and domain III of FGFR3. Based on this, competition ELISA assay was performed. As a result, the B701 and D11 antibodies were observed to bind to FGFR3 competitively with the FGF ligand as expected, whereas the F309 antibody was observed to bind to FGFR3 regardless of the FGF ligand. This can be judged as supporting evidence for binding to the aforementioned FGFR3 Ig domain I. (Fig. 9a)
- Example 14 Evaluation of target resolution of FGFR3 antibody; Western blotting
- GBM15-682T patient-derived cells were used as representative cells similar to the FACS method.
- 2.0E+06 cells/well were aliquoted into cells in a 6-well plate, and each antibody was treated at a concentration of 30ug/ml and reacted at 37°C for 3 hours. After that, lysate was prepared and 20 ⁇ g of each sample was counted through Bradford quantitation, and western blotting was performed. Total FGFR3 was observed with the sc-13121 antibody. In the KMS11 cell line, the experiment was performed with the same concentration and reaction conditions. As with the FACS results, it was confirmed that the overall FGFR3 resolution of the F309 and FS306 clones was excellent. (Fig. 10b)
- the cell internalization mechanism of the antibody was further verified through the ICC method.
- GBM15-682T was used as the FGFR3 overexpressing cell
- U87MG was used as the underexpressing cell.
- PLO reagent was coated in advance and the cells were cultured thereon.
- U87MG the adherent cells were processed without PLO treatment.
- each antibody was treated with 30ug/ml to the cells attached to the ICC slide and reacted at 37°C for 2 hours. Cell internalization inactivation conditions were reacted at the same concentration at 4 degrees for 2 hours.
- washing was carried out and fixed with 2% PFA (10 minutes, 4 degrees). The same washing method was performed once more, and 0.1% Triton-X was reacted for 3 min at room temperature to permeate the cells and wash again. Then, blocking was performed with 1% BSA at room temperature for 30 minutes, and the primary antibody was treated overnight at 4°C.
- the primary antibody the lysosomal marker LAMP-1 antibody and anti-human IgG were used.
- washing was carried out, and the secondary antibody was reacted for 1 hour at 4 degrees under light-shielded conditions.
- an antibody with fluorescence that probed the primary antibody was used (Alexa 488; Anti-human LAMP1, Alexa 594; Anti-human IgG).
- Example 16 Target degradation mechanism of FGFR3 antibody; Antibody Mechanism Analysis Through Lysosomal Inhibition
- a lysosomal inhibitor in order to identify the mechanism of degradation of the FGFR3 target of the excavated antibody described above, verification was performed using a lysosomal inhibitor.
- an antibody binds to a specific antigen on the cell surface, receptor mediated endocytosis and a mechanism in which the receptor and antibody are both degraded in lysosomes have been reported. Therefore, among the FGFR3 antibodies, the degradation in the lysosome of the antibodies whose FGFR3 resolution was confirmed was verified, and the total FGFR3 levels of the lysosomal inhibitor-treated and untreated samples were confirmed through western blotting.
- GBM15-682T was dispensed in a 6-well plate at 1.5E+06 cells/well, and Concanamycin, known as a lysosomal inhibitor, was treated at a concentration of 100 nM for 2 hours at 37°C.
- Concanamycin known as a lysosomal inhibitor
- DMSO was treated.
- the antibody was treated at 37°C for 3 hours at 30 ug/ml, respectively.
- the total FGFR3 level was confirmed by proceeding in the same manner as the western blotting method described above.
- the total FGFR3 was not reduced even when the F309 and FS306 clones were treated, and the total FGFR3 was significantly decreased in the untreated condition. It is thought to be degraded together with FGFR3 in (Fig. 11b)
- Example 17 Signaling pathway inhibition assay; Western blotting
- Example 18 Cancer cell growth inhibitory ability assay; Ligand-dependent environment
- GBM15-682T was dispensed at 10000 cells/well in a serum-free condition in a 96-well black-flat bottom plate, and after starvation for one day, the ligand FGF1 (232-FA, R&D) and FGF9 (273-F9, R&D) were treated to a final concentration of 50 ng/ml, and the antibody was also serially diluted and treated for each concentration. After that, culture was performed in a 37 degree CO2 incubator for 7 days.
- the ability of the antibody to inhibit cancer cell growth in a ligand-independent environment was evaluated.
- GBM15-682T patient-derived cells were dispensed in a 96-well black-flat bottom plate at 10000 cells/well, and the antibody was serially diluted and treated by concentration. After that, culture was performed in a 37 degree CO2 incubator for 7 days. Cell growth was measured through CellTiter-Glo® Luminescent Cell Viability Assay, and the cell growth of the antibody-treated group compared to the control group was compared.
- Example 20 In vivo short-term PK assay and efficacy evaluation in xenograft model
- Short-term PK was performed to check whether the initial clearance of the excavated antibody was administered in vivo.
- Antibody 10 mg/kg was administered to Balb/c mice, and blood samples were obtained for each individual immediately after administration at intervals of 1 hr, 2 hr, 4 hr, 1 day, and 2 days.
- plasma was obtained through a centrifuge, and antibody titer in plasma was quantified based on ELISA.
- F309 and FS306 antibodies had an initial PK of a normal antibody without an initial clearance pattern (FIG. 14a).
- F309 and FS306 clones inhibited cancer growth by about 50% and 40%, respectively, when administered at 10 mg/kg (3 times a week), respectively ( FIG. 14A ).
- F309 it is thought to inhibit cancer growth with an excellent anticancer effect when administered twice a week by concentration (30mpk, 10mpk, 3mpk) (FIG. 14b).
- Affinity maturation was performed to further improve F309's excellent FGFR3 degradation and cancer growth inhibitory ability.
- a phagemid vector displaying the F309 scFv fragment (heavy chain variable region; VH, light chain variable region; VL) on the surface of M13 bacteriophage was constructed and used as a library template.
- CDR H1, H2, H3 and CDR L1, L2, L3 were selected based on Kabat numbering of the antibody, and F309 mutant library was constructed using primers containing NNK degeneration codon for each CDR ( 15a).
- the biopanning (antigen-fixed panning) described above was performed 3 to 4 times, and based on this, an antibody with higher affinity than the F309 parent antibody was cloned by ELISA-based affinity screening.
- the obtained clone was re-verified by performing a reproduction experiment, and finally, an affinity matured mutant of F309 was obtained through antibody sequence analysis. It is determined that the secured F309 mutants have significantly increased specific binding capacity to the FGFR3 recombinant protein compared to the parent antibody ( FIG. 15b ).
- SSM023, SSM024, SSM026, SSM034, SSM036, SSM234, and SSM236 were designed and prepared as amino acid residue combinations for SSM001 to SSM010 mutants.
- ELISA was performed to verify the FGFR3 antigen-specific binding capacity analysis for the antibodies against this, and as a result, further elevated FGFR3 antigen affinity was confirmed [ FIGS. 15b and 15c ].
- Analysis of the biological activity of the mutant antibody was performed in GBM15-682T, and as a result, it was confirmed that increased cancer growth inhibition compared to the F309 parent antibody (FIG. 15d).
- the antibody specifically binds to the antigen on the cell surface, flows into the cell through receptor-mediated cell internalization, and is degraded by lysosomes and proteases inside the cell, resulting in conjugated toxic substances. It has a mechanism to kill cells. This is a platform that can maximize the therapeutic effect and is widely used as a next-generation antibody therapeutic platform. In the present invention, it was attempted to confirm the applicability of the antibody-drug conjugates to clones with excellent internalization and target resolution for FGFR3, FGFR3-TACC3 fusion cells.
- the F309 and FS306 clones were determined to be applicable as an antibody-drug conjugate platform because FGFR3 target resolution and cell internalization were demonstrated as described in the present invention.
- the PerKitTM Antibody MMAE Conjugation Kit CellMosaic
- CellMosaic was used to prepare the antibody-drug conjugate for the F309 clone, and this platform was developed as a first-generation antibody-drug conjugate technology (a method developed by Seattle Genetics: Sun et al. 2005, Bioconjugate Chem. 16, 1282-1290) is a method of optionally conjugating -vc MMAE to the interchain disulfide of an antibody (FIG. 16a).
- F309-vc MMAE showed superior cytotoxicity than LY3076266-vc MMAE in FGFR3-TACC3 fusion GBM15-682T.
- the growth inhibitory effect of ADC on cells according to the expression level of each FGFR3 was analyzed by IC50 and MAX inhibition, and is shown in the table of (FIG. 16d).
- the previously performed epitope domain mapping was also performed on the affinity matured antibody F309#SSM236 (hereinafter, AMB302#1.2).
- AMB302#1.2 affinity matured antibody F309#SSM236
- binding to domain D1 was confirmed, and even when analyzed using the same domains (Domain, I, Domain, II, Domain III), the affinity matured antibody was found to specifically bind to domain D1. Confirmed.
- the antibody it was reconfirmed that it has specific binding ability to human/cyno FGFR3 (FIG. 17).
- the KD values for each antigen are shown in Table 14 below.
- plasma was obtained through a centrifuge, and antibody titer in plasma was quantified based on quantification ELISA.
- a single dose of 50 mg/kg was administered after administration of 25 mg/kg, and blood samples were collected for each hour (10 minutes, 1 and 6). hours, 1, 2, 3, 7, 10, 14, 21, and 28 days).
- the obtained blood plasma was obtained through a centrifuge to remove blood cells, and the antibodies in the plasma were quantified through quantification ELISA.
- a stable half-life (10 days or more) and CL tendency were confirmed similar to the results in mice.
- biologically specific clinical side effects and weight changes were not observed at all administration concentrations (FIG. 22).
- ADC preparation was performed for the mutants obtained through affinity maturation engineering in the present invention (FIG. 23).
- the purified antibody sample was treated with tris(2-Carboxyethyl) phosphine hydrochloride (TCEP) in an equivalent ratio of 8.0 or more, and completely reduced at 37°C for 2 hours.
- TCEP tris(2-Carboxyethyl) phosphine hydrochloride
- buffer exchange was performed with PBS pH7.4, and the linker-payload (Topoisomerase I inhibitor, equivalence ratio 10.0) was dissolved in DMA for the sample and conjugated to the reduced antibody at 37°C for 2 hours.
- the buffer was exchanged through a centrifugal column (Amicon Ultra-15 Centrifugal Filter Units).
- the antigen affinity of the synthesized ADC sample was confirmed through ELISA.
- high-purity properties of the prepared ADC were confirmed through SEC-HPLC analysis.
- DAR analysis was performed through LC-MS, and mass spectrometry of the linker-payload attached to the heavy chain and light chain was performed on the prepared ADC, respectively, and it was confirmed that it was approximately DAR 6 or higher (Fig. 25). ).
- Example 28 Affinity Mature Antibody ADC Assay (Duocarmycin, Linker-AMB401)
- ADC efficacy evaluation was performed on organoids derived from patients overexpressing FGFR3 (TACC3 fusion).
- TACC3 fusion organoids derived from patients overexpressing FGFR3
- a single spheroid organoid model was created by isolating cancer cells from cancer tissues derived from brain tumor patients.
- Two types of patient-derived cells with FGFR3-TACC3 fusion (AMB-BT-0050T, AMB-BT-0112T) and non-patient-derived cells (AMB-BT-0013T) were incubated overnight to form single spheroids, followed by ADC was treated and incubated for a week, and the results were checked.
- Example 30 Efficacy evaluation of affinity matured mutant ADC in patient-derived organoid ex vivo model (ADC-Duocarmycin, linker-AMB401)
- Example 31 FGFR3 (TACC3 fusion) evaluation of ADC efficacy in an orthotopic animal model of brain tumor (ADC-TOPOI)
- the increase in survival rate in an orthotopic animal model of brain tumor (brain tumor, GBM) through ADC treatment was evaluated ( FIG. 29 ).
- a brain tumor mouse model was prepared by injecting the prepared cell line at a depth of 3.2 mm at a position of 1.7 mm left and 0.5 mm above the bregma of immunodeficient mice.
- Control, Control-TOPOI, and AMB302#1.2-TOPOI single administration, multiple administration
- the candidate drug was administered once via intravenous injection on the 7th day after model production. On the 15th day, two intermediate samples per group were sampled for biomarker analysis. The weight of the mice was measured twice a week, and when there was a weight loss of 20% or more, euthanasia was carried out and the brains of the mice were removed. In the case of AMB302#1.2-TOPOI, it was confirmed that the survival period of mice increased by more than 70% even through a single administration.
- Example 32 ADC efficacy evaluation in FGFR3 (TACC3 fusion) subcutaneous transplantation model (ADC-TOPOI)
- Example 33 FGFR3 (TACC3 fusion) evaluation of ADC efficacy in an orthotopic animal model of brain tumor (ADC-Duocarmycin, linker-AMB401)
- Efficacy evaluation was performed with a single dose (10 mg/kg) or multiple doses (10 mg/kg, Q4D) of AMB302#1.1-AMB401 in the same model as previously performed. It was confirmed that the survival rate was significantly increased in the ADC administration group, and in particular, it was confirmed that the survival rate increased by 30% or more in the group subjected to multiple administrations ( FIG. 32 ).
- the anti-FGFR3 antibody or antigen-binding fragment thereof according to the present invention exhibits superior binding to FGFR3 than the existing anti-FGFR3 antibody, and can be usefully used for the prevention or treatment of a desired tumor or cancer.
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Abstract
Description
Claims (45)
- 다음을 포함하는 FGFR3 (Fibroblast growth factor receptor 3)에 특이적으로 결합하는 항체 또는 이의 항원 결합단편:서열번호 1 내지 서열번호 18로 구성된 군에서 선택된 하나 이상의 아미노산 서열을 포함하는 중쇄 CDR1,서열번호 19 내지 서열번호 41로 구성된 군에서 선택된 하나 이상의 아미노산 서열을 포함하는 중쇄 CDR2,서열번호 42 내지 서열번호 66, 서열번호 186 내지 198로 구성된 군에서 선택된 하나 이상의 아미노산 서열을 포함하는 중쇄 CDR3,서열번호 67 내지 서열번호 88로 구성된 군에서 선택된 하나 이상의 아미노산 서열을 포함하는 경쇄 CDR1,서열번호 89 내지 서열번호 109로 구성된 군에서 선택된 하나 이상의 아미노산 서열을 포함하는 경쇄 CDR2 및서열번호 110 내지 서열번호 132, 서열번호 199 내지 서열번호 202로 구성된 군에서 선택된 하나 이상의 아미노산 서열을 포함하는 경쇄 CDR3.
- 제1항에 있어서, 서열번호 133 내지 서열번호 157, 서열번호 203 내지 서열번호 215로 구성된 군에서 선택된 하나 이상의 아미노산 서열을 포함하는 중쇄 가변영역을 포함하는, 항체 또는 이의 항원 결합단편.
- 제1항에 있어서, 서열번호 158 내지 서열번호 182, 서열번호 216 내지 서열번호 219로 구성된 군에서 선택된 하나 이상의 아미노산 서열을 포함하는 경쇄 가변영역을 포함하는, 항체 또는 이의 항원 결합단편.
- 제1항에 있어서, 상기 항체는 서열번호 5의 중쇄 CDR 1, 서열번호 23의 중쇄 CDR2 및 서열번호 203 내지 215로 구성된 군에서 선택되는 어느 하나의 중쇄 CDR3을 포함하는 중쇄 가변영역, 서열번호 71의 경쇄 CDR1, 서열번호 93의 경쇄 CDR2 및 서열번호 216 내지 219로 구성된 군에서 선택되는 어느 하나의 경쇄 CDR3를 포함하는 경쇄 가변영역을 포함하는, 항체 또는 이의 항원 결합단편.
- 제1항에 있어서, 단쇄 Fvs (scFv), 단쇄 항체, Fab, F(ab'), 다이설파이드-결합 Fvs (sdFv)을 포함하는, 항체 또는 이의 항원 결합단편.
- 제5항에 있어서, 상기 scFv는 서열번호 133 내지 서열번호 157로 구성된 군에서 선택된 하나 이상의 아미노산 서열을 포함하는 중쇄 가변영역과 서열번호 158 내지 서열번호 182로 구성된 군에서 선택된 하나 이상의 아미노산 서열을 포함하는 경쇄 가변영역이 링커를 통해 연결된 것을 특징으로 하는, 항체 또는 이의 항원 결합단편.
- 제6항에 있어서, 상기 링커는 (GnS)m (n, m은 각각 1 내지 10)을 포함하는, 항체 또는 이의 항원 결합단편.
- 제1항 내지 제7항 중 어느 한 항에 따른 항체 또는 이의 항원 결합단편을 코딩하는 핵산.
- 제8항의 핵산을 포함하는 재조합 발현벡터.
- 제9항의 재조합 발현벡터로 형질감염된 숙주세포.
- 제10항에 있어서, COS-7, BHK, CHO, CHOK1, DXB-11, DG-44, CHO/-DHFR, CV1, COS-7, HEK293, BHK, TM4, VERO, HELA, MDCK, BRL 3A, W138, Hep G2, SK-Hep, MMT, TRI, MRC 5, FS4, 3T3, RIN, A549, PC12, K562, PER.C6, SP2/0, NS-0, U20S, 또는 HT1080인 숙주세포.
- 제10항의 숙주세포를 배양하여 항체를 생성하는 단계; 및 생성된 항체를 분리 및 정제하는 단계를 포함하는, FGFR3에 특이적으로 결합하는 항체 또는 이의 항원 결합단편의 제조방법.
- 제1항 내지 제7항 중 어느 한 항에 따른 항체 또는 이의 항원 결합단편을 포함하는 이중 또는 다중특이적 항체.
- 제13항에 있어서, PD-1, PD-L1, BTLA, CTLA-4, VISTA, LAG3, TIM3, CD137(4-1BB), VISTA, CD258(LIGHT), TIGIT, CD134(OX40), CD28, CD278(ICOS), CD27, CD154(CD40L), CD357(GITR), CD30, DR3, CD226(DNAM1), CD96, CD200, CD200R, Transferrin receptor, c-Met, EGFR, HER2, KDR, PDGFRa, NRP1, MARCO으로 구성된 군에서 선택된 하나 이상을 파트너로 포함하는 이중 또는 다중특이적 항체.
- 제1항 내지 제7항 중 어느 한 항에 따른 항체의 scFv 및 면역세포 활성화 항원에 결합하는 항체의 scFv를 하나 이상 포함하는 제2결합 도메인으로 구성된 scFv를 포함하는, 면역세포 인게이징(immune cell engage) 이중특이적 또는 다중특이적 항체.
- 제15항에 있어서, 상기 scFv는 서열번호 133 내지 서열번호 157, 서열번호 203 내지 서열번호 215로 구성된 군에서 선택된 하나 이상의 아미노산 서열을 포함하는 중쇄 가변영역과 서열번호 158 내지 서열번호 182, 서열번호 216 내지 서열번호 219로 구성된 군에서 선택된 하나 이상의 아미노산 서열을 포함하는 경쇄 가변영역이 링커를 통해 연결된 것을 특징으로 하는, 이중특이적 또는 다중특이적 항체.
- 제16항에 있어서, 상기 링커는 (GnS)m (n, m은 각각 1 내지 10)을 포함하는, 이중특이적 또는 다중특이적 항체.
- 제1항 내지 제7항 중 어느 한 항에 따른 항체 또는 이의 항원 결합단편이 약물에 결합된 항체-약물 접합체 (ADC).
- 제18항에 있어서, 상기 약물은(1) 마이탄시노이드, 오리스타틴 (MMAE, MMAF 포함), 아미노프테린, 악티노마이신, 블레오마이신, 탈리소마이신, 캄프토쎄신, N8-아세틸 스퍼미딘, 1-(2 클로로에틸)-1,2-다이메틸 술포닐 하이드라자이드, 에스퍼라마이신, 에토포사이드, 6-머캅토퓨린, 돌라스타틴, 트리코테센, 칼리케아미신, 탁솔(taxol), 탁산, 파클리탁셀(paclitaxel), 도세탁셀(docetaxel), 메토트렉세이트, 빈크리스틴, 빈블라스틴, 독소루비신, 멜팔란, 미토마이신 A, 미토마이신 C, 클로람부실, 듀오카마이신, L-아스파라기나제(L-asparaginase), 머캡토퓨린(mercaptopurine), 티오구아닌(thioguanine), 하이드록시우레아(hydroxyurea), 시타라빈(cytarabine), 사이클로포스파미드(cyclophosphamide), 이포스파미드(ifosfamide), 니트로소우레아(nitrosourea), 시스플라틴(cisplatin), 카보플라틴(carboplatin), 미토마이신(mitomycin), 다카바진(dacarbazine), 프로카바진(procarbazine), 토포테칸(topotecan), 질소 머스터드(nitrogen mustard), 사이톡산(cytoxan), 에토포시드(etoposide),5-플루오로우라실(5-fluorouracil), CNU(bischloroethylnitrosourea), 이리노테칸(irinotecan), 캄포토테신(camptothecin), 블레오마이신(bleomycin), 이다루비신(idarubicin), 다우노루비신(daunorubicin), 닥티노마이신(dactinomycin), 플리카마이신(plicamycin), 미톡산트론(mitoxantrone), 아스파라기나제(asparaginase), 비노렐빈(vinorelbine), 클로로람부실(chlorambucil), 멜파란(melphalan), 카르무스틴(carmustine), 로무스틴(lomustine), 부설판(busuLfan), 트레오설판(treosulfan), 데카바진(decarbazine), 에토포시드(etoposide), 테니포시드(teniposide), 토포테칸(topotecan), 9-아미노캠프토테신(9-aminocamptothecin), 크리스나톨(crisnatol), 미토마이신 C(mitomycin C), 트리메트렉세이트(trimetrexate), 마이코페놀산(mycophenolic acid), 티아조퓨린(tiazofurin), 리바비린(ribavirin), EICAR(5-ethynyl-1-beta-Dribofuranosylimidazole-4-carboxamide), 하이드록시우레아(hydroxyurea), 데프록사민(deferoxamine), 플룩수리딘(floxuridine), 독시플루리딘(doxifluridine), 랄티트렉세드(raltitrexed), 시타라빈(cytarabine(ara C)), 시토신 아라비노시드(cytosine arabinoside), 플루다라빈(fludarabine), 타목시펜(tamoxifen), 라록시펜(raloxifene), 메게스트롤(megestrol), 고세렐린(goserelin), 류프롤리드 아세 테이트(leuprolide acetate), 플루타미드(flutamide), 바이칼루타마이드(bicalutamide), EB1089, CB1093, KH1060, 베르테포르핀(verteporfin), 프탈로시아닌(phthalocyanine), 광감작제 Pe4(photosensitizer Pe4), 데메톡시-하이포크레린 A(demethoxy-hypocrellin A), 인터페론-α(Interferon-α), 인터페론-γ(Interferon-γ), 종양 괴사 인자(tumor necrosis factor), 겜사이타빈(Gemcitabine), 벨케이드(velcade), 레발미드(revamid), 탈라미드(thalamid), 로바스타틴(lovastatin), 1-메틸-4-페닐피리디늄 이온(1-methyl-4-phenylpyridiniumion), 스타우로스포린(staurosporine), 악티노마이신 D(actinomycin D), 닥티노마이신(dactinomycin), 블레오마이신 A2(bleomycin A2), 블레오마이신 B2(bleomycinB2), 페플로마이신(peplomycin), 에피루비신(epirubicin), 피라루비신(pirarubicin), 조루비신(zorubicin), 마이토산트론(mitoxantrone), 베라파밀(verapamil) 및 탑시가르긴(thapsigargin), 핵산 분해 효소 및 세균이나 동식물 유래의 독소로 구성된 군에서 선택된 하나 이상의 항암제,(2) 스테로이드제제, 비-스테로이드항염증제(NSAIDs) 또는 면역특이소염제제(ImSAIDs)를 포함하는 항염증제; 또는(3) 아자티오프린, 클로람부실, 사이클로포스파마이드, 사이클로스포린, 미코페놀레이트, 아자치오프린(azathioprine), 또는 메토트렉세이트(methotrexate)를 포함하는 면역질환 치료제인 것을 특징으로 하는 항체-약물 접합체.
- 제18항에 있어서, 상기 항체 또는 이의 항원 결합단편은 약물과 링커를 통하여 결합되는 것을 특징으로 하는 항체-약물 접합체.
- 제20항에 있어서, 상기 링커는 절단성 링커 또는 비절단성 링커인 것을 특징으로 하는 항체-약물 접합체.
- 제21항에 있어서, 상기 절단성 링커는 산성 불안정 링커 (acid-labile linker), 이황화 링커, 펩타이드 링커, 또는 베타-글루쿠로나이드 (beta-glucuronide) 링커이고, 또는 상기 비절단성 링커는 티오에테르기 또는 말레이미도카프로일기를 포함하는 것을 특징으로 하는 항체-약물 접합체.
- 제20항에 있어서, 상기 링커는 항체의 이황화 결합 환원시 노출되는 시스테인 잔기 또는 항체에 결합된 태그에 존재하는 시스테인 잔기에 결합되는 것을 특징으로 하는 항체-약물 접합체.
- 항원 결합 부위를 포함하는 세포외도메인, 트랜스 멤브레인 도메인 및 세포내 신호전달 도메인을 포함하는 키메라 항원 수용체(CAR)로, 상기 세포외도메인의 항원 결합 부위는 제1항 내지 제7항 중 어느 한 항에 따른 항체의 scFv인 것을 특징으로 하는 키메라 항원 수용체.
- 제24항에 있어서, 상기 scFv는 서열번호 133 내지 서열번호 157로 구성된 군에서 선택된 하나 이상의 아미노산 서열을 포함하는 중쇄 가변영역과 서열번호 158 내지 서열번호 182로 구성된 군에서 선택된 하나 이상의 아미노산 서열을 포함하는 경쇄 가변영역이 링커를 통해 연결된 것을 특징으로 하는, 조성물.
- 제25항에 있어서, 상기 링커는 (GnS)m (n, m은 각각 1 내지 10)을 포함하는, 조성물.
- 제24항에 따른 키메라 항원 수용체(CAR)가 도입되어 있는 면역세포.
- 제27항에 있어서, T 세포, NK 세포, 사이토카인 유도 살해세포(Cytokine Induced Killer cell, CIK), 활성화 세포독성 T 림프구(Cytotoxic T Lymphocyte, CTL), 마크로파지, 종양 조직 내 침투 T 세포 (Tumor-Infiltrating Lymphocytes, TIL), 수지상세포로 구성된 군에서 선택된 하나 이상인 면역세포.
- 제27항에 있어서, 상기 항-FGFR3 항체 이외의 항체에 대한 scFv가 세포외도메인의 항원 결합 부위로 포함된 키메라 항원 수용체(CAR)가 추가로 도입되어 있는 면역세포.
- 제29항에 있어서, 상기 항-FGFR3 항체 이외의 항체는 PD-1, PD-L1, BTLA, CTLA-4, VISTA, LAG3, TIM3, CD137(4-1BB), VISTA, CD258(LIGHT), TIGIT, CD134(OX40), CD28, CD278(ICOS), CD27, CD154(CD40L), CD357(GITR), CD30, DR3, CD226(DNAM1), CD96, CD200, CD200R, Transferrin receptor, c-Met, EGFR, HER2, KDR, PDGFRa, NRP1, MARCO으로 구성된 군에서 선택된 하나 이상을 타겟하는 항체인 면역세포.
- 제27항의 면역세포 및 항-FGFR3 항체 이외의 약물을 포함하는 병용 치료용 조성물.
- 제31항에 있어서, 상기 항-FGFR3 항체 이외의 약물은 PD-1, PD-L1, BTLA, CTLA-4, VISTA, LAG3, TIM3, CD137(4-1BB), VISTA, CD258(LIGHT), TIGIT, CD134(OX40), CD28, CD278(ICOS), CD27, CD154(CD40L), CD357(GITR), CD30, DR3, CD226(DNAM1), CD96, CD200, CD200R, Transferrin receptor, c-Met, EGFR, HER2, KDR, PDGFRa, NRP1, MARCO으로 구성된 군에서 선택된 하나 이상을 타겟하는 항체인 조성물.
- 제1항 내지 제7항 중 어느 한 항에 따른 항체 또는 이의 항원 결합단편과 다음으로 구성된 군에서 선택된 하나 이상을 포함하는 병용 치료용 조성물:(i) 면역세포;(ii) 항-FGFR3 항체 이외의 항체에 대한 scFv를 세포외도메인으로 포함하는 항원 수용체(CAR)를 포함하는 면역세포; 및(iii) 면역관문억제제 (Immune checkpoint inhibitor).
- 제33항에 있어서, 상기 면역세포는 T 세포, NK 세포, 사이토카인 유도 살해세포(Cytokine Induced Killer cell, CIK), 활성화 세포독성 T 림프구(Cytotoxic T Lymphocyte, CTL), 마크로파지, 종양 조직 내 침투 T 세포 (Tumor-Infiltrating Lymphocytes, TIL), 수지상세포로 구성된 군에서 선택된 하나 이상인 조성물.
- 제33항에 있어서, 상기 항-FGFR3 항체 이외의 항체는 PD-1, PD-L1, BTLA, CTLA-4, VISTA, LAG3, TIM3, CD137(4-1BB), VISTA, CD258(LIGHT), TIGIT, CD134(OX40), CD28, CD278(ICOS), CD27, CD154(CD40L), CD357(GITR), CD30, DR3, CD226(DNAM1), CD96, CD200, CD200R, Transferrin receptor, c-Met, EGFR, HER2, KDR, PDGFRa, NRP1, MARCO으로 구성된 군에서 선택된 하나 이상을 타겟하는 항체인 조성물.
- 제33항에 있어서, 상기 면역관문억제제는 PD-1, PD-L1, BTLA, CTLA-4, VISTA, LAG3, TIM3, CD137(4-1BB), VISTA, CD258(LIGHT), TIGIT, CD134(OX40), CD28, CD278(ICOS), CD27, CD154(CD40L), CD357(GITR), CD30, DR3, CD226(DNAM1), CD96, CD200, CD200R, Transferrin receptor, c-Met, EGFR, HER2, KDR, PDGFRa, NRP1, MARCO으로 구성된 군에서 선택된 하나 이상을 타겟으로 하는 약물인 조성물.
- 제13항에 따른 이중특이적 또는 다중특이적 항체 및 다음으로 구성된 군에서 선택된 하나 이상을 포함하는 병용 치료용 조성물:(i) 면역세포;(ii) 항-FGFR3 항체 이외의 항체에 대한 scFv 단편을 세포외도메인으로 포함하는 항원 수용체(CAR)를 포함하는 면역세포; 및(iii) 면역관문억제제 (Immune checkpoint inhibitor).
- 제37항에 있어서, 상기 항-FGFR3 항체 이외의 항체는 PD-1, PD-L1, BTLA, CTLA-4, VISTA, LAG3, TIM3, CD137(4-1BB), VISTA, CD258(LIGHT), TIGIT, CD134(OX40), CD28, CD278(ICOS), CD27, CD154(CD40L), CD357(GITR), CD30, DR3, CD226(DNAM1), CD96, CD200, CD200R, Transferrin receptor, c-Met, EGFR, HER2, KDR, PDGFRa, NRP1, MARCO으로 구성된 군에서 선택된 하나 이상을 타겟하는 항체인 조성물.
- 제37항에 있어서, 상기 면역관문억제제는 PD-1, PD-L1, BTLA, CTLA-4, VISTA, LAG3, TIM3, CD137(4-1BB), VISTA, CD258(LIGHT), TIGIT, CD134(OX40), CD28, CD278(ICOS), CD27, CD154(CD40L), CD357(GITR), CD30, DR3, CD226(DNAM1), CD96, CD200, CD200R, Transferrin receptor, c-Met, EGFR, HER2, KDR, PDGFRa, NRP1, MARCO으로 구성된 군에서 선택된 하나 이상을 타겟으로 하는 약물인 조성물.
- 제1항 내지 제7항 중 어느 한 항에 따른 항체 또는 이의 항원 결합단편, 상기 항체 또는 이의 항원 결합단편을 포함하는 이중 또는 다중특이적 항체, 상기 항체 또는 이의 항원 결합단편을 포함하는 항체-약물 접합체, 상기 항체 또는 이의 항원 결합단편을 포함하는 키메라 항원 수용체 또는 상기 키메라 항원 수용체를 포함하는 면역세포를 포함하는 암, 염증 또는 면역질환 치료용 조성물.
- 제1항 내지 제7항 중 어느 한 항에 따른 항체 또는 이의 항원 결합단편, 상기 항체 또는 이의 항원 결합단편을 포함하는 항체-약물 접합체를 포함하는 암, 염증 또는 면역질환 치료용 조성물.
- FGFR3과 TACC3의 융합 유전자가 증폭되거나, 융합 유전자에 변이가 있거나, 융합 유전자가 과발현되거나 또는 융합 유전자가 항상 발현 (constitutive activation)되는 것으로 확인된 암을 치료하기 위한, 제1항 내지 제7항 중 어느 한 항에 따른 항체 또는 이의 항원 결합단편, 상기 항체 또는 이의 항원 결합단편을 포함하는 이중 또는 다중특이적 항체, 항체-약물 접합체, 키메라 항원 수용체 또는 상기 키메라 항원 수용체를 포함하는 면역세포를 포함하는, 암, 염증 또는 면역질환 치료용 조성물.
- 환자 유래 샘플에서 FGFR3과 TACC3의 융합 유전자가 증폭되거나, 융합 유전자에 변이가 있거나, 융합 유전자가 과발현되거나 또는 융합 유전자가 항상 발현 (constitutive activation)되는 것을 확인하는 단계;FGFR3과 TACC3의 융합 유전자가 증폭되거나, 융합 유전자에 변이가 있거나, 융합 유전자가 과발현되거나 또는 융합 유전자가 항상 발현 (constitutive activation)되는 것으로 확인된 경우, 제1항 내지 제7항 중 어느 한 항에 따른 항체 또는 이의 항원 결합단편, 상기 항체 또는 이의 항원 결합단편을 포함하는 이중 또는 다중특이적 항체, 항체-약물 접합체, 키메라 항원 수용체 또는 상기 키메라 항원 수용체를 포함하는 면역세포를 투여하는 단계를 포함하는, 암, 염증 또는 면역질환 치료방법.
- 제1항 내지 제7항 중 어느 한 항에 따른 항체 또는 이의 항원 결합단편이 그 외부로 표출되거나 또는 그 내부에 존재하는 소포체 (vesicle).
- 제44항에 있어서, 엑소좀인 소포체.
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CN202280018747.2A CN116981693A (zh) | 2021-01-05 | 2022-01-05 | 抗fgfr3抗体及其用途 |
EP22736814.9A EP4276112A1 (en) | 2021-01-05 | 2022-01-05 | Anti-fgfr3 antibody and use thereof |
US18/260,308 US20240101684A1 (en) | 2021-01-05 | 2022-01-05 | Anti-fgfr3 antibody and use thereof |
JP2023565124A JP2024502386A (ja) | 2021-01-05 | 2022-01-05 | 抗FGFR3抗体およびその用途 {Anti-FGFR3 Antibody and Use Thereof} |
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WO2024107765A3 (en) * | 2022-11-14 | 2024-07-04 | Regeneron Pharmaceuticals, Inc. | Compositions and methods for fibroblast growth factor receptor 3-mediated delivery to astrocytes |
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