WO2004081047A1 - モノクローナル抗体及びこれを産生するハイブリドーマ - Google Patents
モノクローナル抗体及びこれを産生するハイブリドーマ Download PDFInfo
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- WO2004081047A1 WO2004081047A1 PCT/JP2004/003424 JP2004003424W WO2004081047A1 WO 2004081047 A1 WO2004081047 A1 WO 2004081047A1 JP 2004003424 W JP2004003424 W JP 2004003424W WO 2004081047 A1 WO2004081047 A1 WO 2004081047A1
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- Prior art keywords
- hepr
- monoclonal antibody
- human
- antibody
- hybridoma
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
- G01N33/574—Immunoassay; Biospecific binding assay; Materials therefor for cancer
- G01N33/57407—Specifically defined cancers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P35/00—Antineoplastic agents
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
- C07K16/18—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
- C07K16/22—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against growth factors ; against growth regulators
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
- C07K16/18—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
- C07K16/24—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against cytokines, lymphokines or interferons
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N5/00—Undifferentiated human, animal or plant cells, e.g. cell lines; Tissues; Cultivation or maintenance thereof; Culture media therefor
- C12N5/10—Cells modified by introduction of foreign genetic material
- C12N5/12—Fused cells, e.g. hybridomas
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
- G01N33/574—Immunoassay; Biospecific binding assay; Materials therefor for cancer
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
- G01N33/574—Immunoassay; Biospecific binding assay; Materials therefor for cancer
- G01N33/57407—Specifically defined cancers
- G01N33/57419—Specifically defined cancers of colon
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
- G01N33/574—Immunoassay; Biospecific binding assay; Materials therefor for cancer
- G01N33/57407—Specifically defined cancers
- G01N33/57423—Specifically defined cancers of lung
Definitions
- the present invention relates to a monoclonal antibody (monoclonal antibody; MoAb) that specifically recognizes human epiregulin (hEPR), a hy-prideoma that produces the MoAb, a polyclonal antibody that recognizes the MoAb and hEPR (
- MoAb monoclonal antibody
- hEPR human epiregulin
- hy-prideoma that produces the MoAb
- polyclonal antibody that recognizes the MoAb
- the present invention relates to an immunoassay method for specifically detecting hEPR in a sample using hEPR-polyclonal antibody (hEPR-PoAb).
- EGF epiregulin
- EPR epiregulin
- mRNA is extremely low in normal tissues except for placenta and monocytes, and is reported to be elevated in certain cancer cells (eg, The Journal of Biologi cal Chemistry, 1995, Vol. 270). , p. 7495-7500; see The Biochemical Journal, 1997, Vol. 326, p. 69-75).
- EPR The protein of the EPR and other EGF family members, the identity of 24-50 0/0 Dearu that negligence ⁇ is in Rereru of Amino acid sequence (The Journal of Biological Chemistry, 1995 , Vol. 270, p. 7495-7500).
- EPR has very high sequence homology between species.For example, in human and mouse EPR, only 6 amino acids out of 46 amino acid residues are different, and in the above polyclonal antibody, As described above, not only is the operation complicated, but they could not be identified and detected.
- conventional detection has a sensitivity of at most lng / ml, making it impossible to detect EPR in vivo.
- An object of the present invention is to establish a simple and highly sensitive method for detecting hEPR and use it for the detection of human tumors.
- the present invention provides a method useful for detecting a tumor, which can easily detect the presence of hEPR at a picogram level.
- the present inventors have conducted intensive studies to solve the above problems, and as a result, have obtained two types of hybridomas (1C3, 3E8) that produce a monoclonal antibody (MoAb) that specifically recognizes hEPR. Furthermore, we established a sandwich enzyme-linked immunosorbent assay (SE-ISA) combining this MoAb and hEPR-PolyAb, and completed a detection system with high sensitivity and low throughput.
- SE-ISA sandwich enzyme-linked immunosorbent assay
- the present invention provides the following (1) to (9).
- hEPR human epiregulin
- a method for specifically detecting hEPR in a sample in vitro comprising using the monoclonal antibody according to (4) and a polyclonal antibody (hEPR-PoAb) recognizing hEPR.
- kits for detecting a human tumor comprising the monoclonal antibody according to (4).
- FIG. 1 shows the results of measuring the titer of an anti-hEPR monoclonal antibody produced by the hybridoma of the present invention by ELISA.
- FIG. 2 shows the results of titration of a biotinylated anti-hEPR polyclonal antibody.
- FIG. 3 shows the detection sensitivity of the sandwich ELISA (S-ELISA) system using the stepwise method and the simultaneous addition method.
- Figure 4 shows the results of an investigation of the specificity of this method by S-ELISA using the 1C3 monoclonal antibody as the primary antibody.
- EGF family molecules mice It did not react with type EPR but only with hEPR.
- FIG. 5 shows the results of Western blot analysis of hEPR in human serum. Molecular weight marker One position (kilodalton; kDa) is shown on the left.
- FIG. 6 shows the results of detecting h EPR in human serum by the S-ELISA method.
- FIG. 7 shows the results of detecting hEPR in various cell culture solutions.
- the term “hEPR” refers to a precursor, a mature form, or a fragment thereof of human epiregulin, unless otherwise specified.
- the term “precursor” refers to a membrane-bound form before enzyme cleavage, and the term “mature” refers to a polypeptide consisting of 46 amino acids (SEQ ID NO: 1) separated from the cell membrane.
- the fragment is a fragment having at least 20 amino acid residues, more preferably at least 30 amino acid residues of the polypeptide, and essentially has a sequence specific to human epiledarin.
- a sequence specific to human epiredarin is not meant to be particularly limiting, for example, a sequence that is known to be different in the comparison between human epiledarin and mouse epiledarin number
- Epiregulin human and "epiregulin mouse j" have the same amino acid sequence as EPR naturally occurring in humans and mice, but are always limited to proteins extracted from nature. It is intended to encompass, for example, recombinants and synthetic polypeptides.
- the term “specifically recognizes” means that it recognizes (or binds) to hEPR, but does not substantially recognize non-human EPRs such as other EGF family proteins or mouse EPR (binding). No) that means.
- precursor, mature and fragmentation of hEPR This means that the polypeptide is recognized (bound) by the recognized polypeptide, but is not substantially recognized (does not bind) by EGF, TGF- ⁇ , mouse EPR, and the like.
- the binding affinity to other EGF family proteins or non-human EPR such as mouse EPR is 100-fold or more, preferably 1,000-fold or more, and more preferably 10,000-fold or more. It means having the above binding affinity.
- substantially does not recognize (bind) means that the binding is not confirmed by the detection means usually used in the art and the detection method of the present invention.
- the hEPR precursor and the polypeptide fragmented for each mature form and the sandwich ELISA (S-ELISA) method are positive. It means that it does not react (is not detected) with EGF, TGF-hi, or EPR derived from mammals other than humans such as mice.
- an “antibody” is a polyclonal antibody (PoAb) or monoclonal antibody (MoAb) that specifically binds to hEPR and hEPR fragment consisting of a full-length molecule, or a partial fragment of these antibodies (for example, degraded by papain or pepsin). Fragments obtained
- the hybridoma and monoclonal antibody according to the present invention can be produced as follows.
- those skilled in the art can use a method appropriately modified based on the following description and a technique known in the art.
- the amino acid sequence of hEPR serving as an antigen and the nucleotide sequence encoding the same are described in W094 / 29340.
- the amino acid sequence is shown in SEQ ID NO: 1, and the nucleotide sequence is shown in SEQ ID NO: 2.
- EPR is described as a tumor cell growth inhibitory factor.
- an expression vector containing a fragment of DNA SEQ ID NO: 2
- a host cell for example, but not limited to, preferably, Bacillus brevis and expressing it.
- the culture was concentrated 20-fold using an ultrafiltration membrane (1000 kDa), and the pH was adjusted to 7.4 with 1 M Tris-HCl (pH 8.0) It can be purified using an anion exchange column such as a Q-sepharose column.
- the pH of the flow-through fraction is adjusted to 5.0 and purified with a cation exchange column, for example, Sepharose.
- purification to a single band by electrophoresis can be performed by performing purification by reversed-phase column chromatography (C4 column).
- hEPR can be chemically synthesized based on the amino acid sequence shown in SEQ ID NO: 1, for example, by a solid phase method (Merrifield, J. Am. Chem. So, Vol. 85, p. 2185 (1963)). . Chemical synthesis by the solid phase method can be usually performed by a standard method using an automatic peptide synthesizer.
- the antigen peptide solution is immunized to a warm-blooded animal by itself or a carrier and a diluent by administering about 4 to 6 times in total.
- Warm-blooded animals used include, for example, egrets, dogs, guinea pigs, mice, rats and the like. It is preferable that a sample blood be collected at the time when the subcutaneous immunization is performed three times to measure the antibody titer.
- the measurement of the antibody titer in the serum can be performed by immobilizing the peptide used as the antigen on a 96-titer / microtiter plate and performing ELISA.
- Purification methods include, for example, ammonium sulfate precipitation, ion exchange chromatography using an anion exchanger such as DEAE cellulose, gel filtration, affinity chromatography using an active adsorbent such as protein A / G, etc. Purification methods can be mentioned, and specificity for hEPR can be improved by purifying using a column on which hEPR is immobilized.
- Monoclonal antibody-producing cells are prepared by selecting individuals with antibody titers from warm-blooded animals immunized with the antigen, collecting spleen or lymph nodes 2 to 5 days after final immunization, and producing the antibody contained in them. By fusing the cells to myeloma cells, MoAb antibody-producing hybridoma cells can be prepared. The fusion operation can be performed according to a known method, for example, the method of Kohler et al. (Nature, 256, 495 (1975)). Examples of bone marrow heavy cells include, but are not limited to, PAI, P3U1 (Human Science Research Resources Punk (Health Science Research Resources Bank; HSRRB), Japan, Catalog No. JCRB0113 and JCRB0708).
- fusion promoter examples include polyethylene glycol (PEG) and Sendai virus (HVJ), and preferably PEG having a molecular weight of 1,000 to 6,000. Efficient cell fusion can be achieved by adding at a concentration of about 10-80% and incubating at 20-40 ° C.
- RPMI 1640 medium containing 10 to 20% fetal bovine serum can be used.
- the cultivation is usually performed under 5% CO 2 at a culture temperature of 20 to 40 ° C for 5 days to 3 weeks.
- the culture supernatant is recovered from the wells in which the hybridoma cells have been cultured, and antibodies that react with the antigen peptide can be selected by ELISA.
- Color is developed using (TMB; Funakoshi) as a substrate. After stopping the reaction with an acid, measure the absorbance at 450/540 nm, select an antibody with a value of about 3 and perform cloning by limiting dilution.
- the desired hybridoma cells thus obtained can be cultured to obtain MoAb from the culture supernatant.
- the hybridoma cells can be administered intraperitoneally to, for example, a mouse (Balb / c), and MoAb can be obtained from the ascites fluid.
- the monoclonal antibody of the present invention the above-mentioned hybridoma, in particular, the epitope recognized by the monoclonal antibody produced by the hybridoma having the accession numbers FERMBP-086647 and FERMBP-084648 is recognized. And a monoclonal antibody that specifically recognizes hEPR.
- the epitope recognized by this monoclonal antibody contains amino acid residues contained in the above-described sequence unique to hEPR.
- the present invention also provides a method for specifically detecting hEPR in a sample in vitro, which comprises using the monoclonal antibody of the present invention and a polyclonal antibody (hEPR-PoAb) recognizing hEPR.
- the sample include blood fluids, body fluids, extracts from tissues, etc. collected from a subject.
- the method is preferably, but not limited to, an S-ELISA method, which comprises contacting a sample which may contain hEPR as an antigen with the monoclonal antibody of the present invention; And a step of bringing the antigen-antibody complex into contact with a polyclonal antibody.
- the above steps may be performed sequentially (stepwise method) or simultaneously (simultaneous addition method).
- the S-ELISA method is described, for example, in “Monoclonal Antibodies, Hybridomas and ELISAJ (Tatsuo Iwasaki et al., Kodansha Scientific)”.
- the detection method of the present invention has extremely high detection sensitivity and can specifically detect hEPR of 10 pg / ml or more. (About 20-30 pg / ml), sufficient detection is possible.
- the present invention also provides an in vitro method for detecting hEPR-expressing cells, particularly human tumors, using the monoclonal antibody of the present invention. Since hEPR is secreted from the cell membrane after being expressed in cells, it can be detected in extracellular fluid, and the sample does not necessarily need to contain the cells themselves.
- the above method includes a step of bringing a human-derived sample into contact with the monoclonal antibody of the present invention, and a step of detecting the presence of hEPR in the sample using the presence or absence of binding to the monoclonal antibody as an index.
- the target human tumor include, but are not limited to, lung cancer, colorectal cancer, bladder cancer, uterine cancer, colon cancer and the like. Since the detection method of the present invention is characterized by high sensitivity, detection can be performed simply and quickly without the need for an operation such as concentration of a sample. This method can be detected by S-ELISA etc.
- the hEPR concentration in the sample is lOpg / ml or more.However, for sufficient detection, the hEPR concentration in the sample must be 25 pg / ml or more. preferable.
- the detection method of the present invention the presence or absence and expression level of hEPR in a specific tumor cell or the like is determined, and further, the relationship between the expression of hEPR and the mechanism of tumor development is clarified. Can contribute. Furthermore, the presence or absence of the tumor in a specific subject can be easily detected based on data on the expression levels in tumor cells and normal cells that highly express hEPR.
- the present invention also provides a kit for detecting a human tumor, comprising the above-described monoclonal antibody of the present invention.
- the kit of the present invention may appropriately contain a polyclonal antibody, a buffer, a coloring reagent, a labeling reagent, a diluent, and the like, in addition to the monoclonal antibody of the present invention.
- the kit of the present invention is a kit for performing S-ELISA.
- hEPR Recombinant hEPR (lmg / ml) (prepared according to the method described in W094 / 29340) Emulsion was performed by adding the same amount of Freund's complete adjuvant to 100 ⁇ l of a physiological saline solution, and emulsified to obtain a mouse (Balb / c 6 weeks old). Immunized on the back. Two weeks later, 50 ⁇ l of lmg / ml antigen peptide (hEPR) physiological saline solution and Freund's incomplete adjuvant were emulsified by sonication, and booster immunization was performed. Thereafter, booster immunization was performed every week.
- hEPR lmg / ml antigen peptide
- lymphocytes were removed in RPMI1640 medium (containing penicillin and streptomycin), and subjected to erythrocyte treatment with 0.17 M ammonium chloride.
- the removed lymphocytes were fused with the myeloma P3U1 strain derived from mouse myeloma by the polyethylene glycol method (PEG shelf 0) to produce hybridoma cells.
- the obtained hybridoma cells were suspended in HAT medium containing one feeder cell, dispensed into a 96-well plate (Nunc), and cultured for 15 days.
- Example 2 Screening of monoclonal antibody Culture supernatants were collected from the wells in which the hybridoma cells obtained in Example 1 were cultured, and MoAbs reacting with the antigen peptide were selected by ELISA.
- HRP horseradish peroxidase
- TMB Tetra Methyl Bendidine Microwell Peroxidase Substrate
- mice (Balb / c) to which 0.5 ml of pristane was intraperitoneally administered 7 days and 3 days before, respectively, were intraperitoneally injected with the selected hybridoma cells of MoAb, 1C3, and 3E8, and about 10 days later, ascites was collected.
- the collected ascites was left at room temperature for 30 minutes, allowed to stand at 4 ° C, centrifuged at 15000 X rpm for 10 minutes, and the supernatant was collected.
- FIG. 1 shows the results of measuring the titers of the two selected MoAbs by ELISA.
- Recombinant hEPR in the amount indicated on the horizontal axis was immobilized on a microwell plate, and 1C3 or 3 ⁇ 8 (1 ⁇ g / ml) was added.
- 1C3 or 3 ⁇ 8 (1 ⁇ g / ml) was added.
- HRP horseradish peroxidase
- the obtained hybridoma producing MoAblC3 and 3E8 was transferred to the National Institute of Advanced Industrial Science and Technology (AIST) at the Patent Organism Depositary on September 25, 2004 (Tsukuba, Ibaraki Prefecture 1-1-1-1 Central 6) and deposited under accession numbers FERM P-19033 and FERMP-19034, respectively.
- hEPR (1 mg / ml) physiological saline solution 1 nil and 1 nil Freund's complete adjuvant (Difco) were emulsified by sonication to give a white heron (Japanese white, weight 2.7 kg, female; Nippon Claire). Immunization was divided into more than 10 places on the back.
- the antiserum was salted out with ammonium sulfate at 40 ° C., dialyzed against 50 mM Tris-HCl (pH 8.0), and purified with Protein-G column (Amersham-Pharmacia) to obtain an IgG fraction.
- NHS-activated Sepharose 4 Fast Flow (Amersham-Pharmacia) 1 mg of recombinant hEPR was combined with 1 mg of sperm in a conventional manner according to the instruction manual to prepare a column. .
- the IgG fraction obtained above was adjusted to ⁇ 80, circulated through this column for at least 10 hours, and the antibody adsorbed on the column was eluted with 50 mM Glysine-HCl (pH.2.5) /0.15 MnaCl. The pH was returned to neutral with M Tris, and dialyzed against 50 mM phosphate buffer (pH 7.4) /0.15 M to obtain an hEPR-specific antibody.
- the specific antibody was biotinylated by a conventional method using a biotinylation reagent (Amersham-Pharmacia).
- the titer of biotinylated anti-hEPR-PoAb was measured by the following method. hEPR was immobilized on 5-fold diluted 9 6 Ueru microphone port plate 200 ng / m l of (100 ⁇ 1 / well) in the highest concentration.
- biotinylated anti-hEPR-PoAb (0.125 g / m 1-1 ⁇ g / ml (50% PROC ACE (Dainippon Pharmaceutical)) : 100 ⁇ l / well): Add 2 ⁇ l of Avidin-HRP (Amersham-Pharmacia) 1000-fold diluted solution and react at room temperature for 30 min. . After the addition of TMB, the reaction was allowed to proceed at room temperature for 30 minutes, the reaction was stopped with 4N-sulfuric acid, and the absorbance at 450-540 nm was measured to detect the titer against the immobilized antigen in the same manner as in Example 2. As a result, all showed a reaction depending on the antigen concentration, and it was confirmed that the titers were usable (Fig. 2).
- Monoclonal antibody, 1C3 at 1 g / ml concentration in 100 ⁇ l / well microplate The mixture was added, incubated at 4 ° C for 24 hours, and immobilized. 0. l% 50 containing Tween20 mM Tris-HCl, and washed 3 times with pH7.5 (TBST) 200 1 / W ell. Next, 25% block ace 200 1 / well was added and incubated at 4 ° C for 24 hours to perform blocking.
- hEPR of an antigen and a biotinylated anti-hEPR-PoAb were added simultaneously, and reacted at room temperature for 2 hours.
- EGF-like growth factor heparin-binding growth factor; HB-EGF
- betacellenoline betacellulin; BTC
- amphiregulin amphiregulin; AR
- -a (heregulin- ⁇ ; HRG-a): All are purchased from R & D or Sigma), mouse-type EPR (manufactured similarly to human-type EPR), or human-type EPR are displayed on the horizontal axis. The added amount was added together with a biotinylated anti-hEPR-PoAb (2 ⁇ g / ml, 50 ⁇ l / well; finall ⁇ g / ml) as an antigen. Six types of EGF family members and mouse EPR are the highest concentration
- Human serum (Rockland INC.) was diluted 10-fold using 50 mM Tris-HC1 buffer pH 7.4 (Gibco BRL). Recombinant hEPR was added to this diluted serum, and the final concentration was lane l: Opg / ral, lane2: 8 pg / ml, lane3: 40 pg / ml, lane4: 200 pg / ml, and lane5: 1000 pg / ml. To prepare a sample.
- the sample thus obtained was electrophoresed using SDS-PAGE (SDS polyacrylaraide gel electrophoresis), transferred to a PVDF membrane (Daiichi Kagaku), and then each antibody recognizing hEPR, anti-hEPR-PoAb,
- HEPR was detected at ⁇ 8.2 kilodaltons (kDa) (Fig. 5).
- kDa kilodaltons
- a band was observed at about 28 kDa in PoAb and 1C3 MoAb, it was considered to be a nonspecific detection band because it was also detected in the antigen (1) lane.
- the monoclonal antibody, 1C3 or 3E8, was applied to a 100 ⁇ l / well microphone plate at a concentration of l / ig / ml and incubated at 4 ° C for 24 hours to fix. 0.1% plate
- Block Ace was added at 200 1 / well, and incubated at 4 ° C. for 24 hours to perform blocking. After washing 3 times with TBST 200 ⁇ 1 / well, hEPR was diluted with 2-fold serial than the highest concentration 400p g / ml of using two-fold dilutions human sera were added at 50 ⁇ 1 / well. At the same time, biotinylated anti-hEPR-PoAb (2 ⁇ g / ml) was added at 50 ⁇ l / well, and the mixture was incubated at room temperature for 2 hours.
- FIG. As shown, it has been made sufficiently detectable to hEPR of both 25 P g / ml concentration of 1C3 ⁇ Pi 3E8.
- Mouse iC38, RAW 264.7, NIH3T3 clone T7, MoAb-3 and human (T-24, A-549, HCT116, colo205, colo201, HeLa, Drawing 9, A431, SK-BR-3, MDA -HEPR by S-ELISA using a culture solution of various cultured cells derived from MB-468, KB, TR-13) at 10 6 cells / 10 ml / dish for 3 days in the presence of 10% fetal bovine serum was detected.
- 1C3 MoAb (l / zg / ml) was immobilized at 100 ⁇ l / well, and after blocking, 50 ⁇ l of various cell culture medium ⁇ ⁇ 1 / well and biotinylated anti-hEPR-PoAb (2 ⁇ g / ml) Co-added at 1 / well and incubated for 2 hours at room temperature. Subsequent operations were performed in the same manner as in Example 4. For control, serum with or without hEPR (10% FBS, human serum, 0.1% BSA (hEPR lng / ral), human serum (EPR lng / ral)) The operation was performed.
- mouse EPR-producing cell NIH3T3 clone T7 did not show absorption of A450 nm, whereas human cancer cells A-549 (human lung cancer cells) and HCT116 ( High hEPR production was confirmed in human colon cancer), colo201 (human colon cancer), colo205 (human colon cancer) and T-24 (human bladder cancer) (Fig. 7). It was confirmed that hEPR can be specifically detected.
- HeLa human cervical cancer
- NB69 human neuroblastoma
- KB human epidermal cancer (oral)
- A431 human epidermal cancer (epidermal)
- SK-BR-3 human In breast cancer
- MDA-MB-468 human breast cancer
- TR-13 human kidney cancer
- the present invention makes it possible to provide a system for specifically and highly sensitively detecting hEPR present in a living body such as human blood or tissue, and is useful for cancer diagnosis or the like which detects the presence of hEPR-expressing tumor cells. It is. Furthermore, it is expected that the method of the present invention will contribute to elucidation of the presence or absence of hEPR expression, and furthermore, the relationship between the expression of hEPR and the mechanism of tumor development.
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- 2004-03-15 AU AU2004220156A patent/AU2004220156B2/en not_active Ceased
- 2004-03-15 JP JP2005503621A patent/JPWO2004081047A1/ja active Pending
- 2004-03-15 CA CA002519105A patent/CA2519105A1/en not_active Abandoned
- 2004-03-15 KR KR1020057017073A patent/KR20050108389A/ko not_active Application Discontinuation
- 2004-03-15 CN CNA2004800069196A patent/CN1761682A/zh active Pending
- 2004-03-15 WO PCT/JP2004/003424 patent/WO2004081047A1/ja active IP Right Grant
- 2004-03-15 US US10/548,591 patent/US7435590B2/en not_active Expired - Fee Related
- 2004-03-15 EP EP04720764A patent/EP1607404A4/en not_active Withdrawn
- 2004-03-15 RU RU2005131842/13A patent/RU2312109C2/ru not_active IP Right Cessation
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WO2008047723A1 (en) * | 2006-10-12 | 2008-04-24 | Forerunner Pharma Research Co., Ltd. | Diagnosis and treatment of cancer using anti-ereg antibody |
JP5687822B2 (ja) * | 2006-10-12 | 2015-03-25 | 中外製薬株式会社 | 抗ereg抗体を用いる癌の診断および治療 |
US9017684B2 (en) | 2006-10-12 | 2015-04-28 | Chugai Seiyaku Kabushiki Kaisha | Diagnosis and treatment of cancer using anti-EREG antibody |
JP2015091796A (ja) * | 2006-10-12 | 2015-05-14 | 中外製薬株式会社 | 抗ereg抗体を用いる癌の診断および治療 |
US10005832B2 (en) | 2009-05-29 | 2018-06-26 | Chugai Seiyaku Kabushiki Kaisha | Method for treating a disease originated from receptor activation by EREG and TGFα |
US9556264B2 (en) | 2011-12-28 | 2017-01-31 | Chugai Seiyaku Kabushiki Kaisha | Humanized anti-epiregulin antibody, and cancer therapeutic agent comprising said antibody as active ingredient |
Also Published As
Publication number | Publication date |
---|---|
EP1607404A4 (en) | 2008-01-23 |
AU2004220156A1 (en) | 2004-09-23 |
MXPA05009751A (es) | 2005-10-26 |
NO20054351L (no) | 2005-11-28 |
CN1761682A (zh) | 2006-04-19 |
JPWO2004081047A1 (ja) | 2006-06-29 |
RU2005131842A (ru) | 2006-02-10 |
US20060252105A1 (en) | 2006-11-09 |
US7435590B2 (en) | 2008-10-14 |
AU2004220156B2 (en) | 2007-04-19 |
NO20054351D0 (no) | 2005-09-20 |
CA2519105A1 (en) | 2004-09-23 |
RU2312109C2 (ru) | 2007-12-10 |
KR20050108389A (ko) | 2005-11-16 |
EP1607404A1 (en) | 2005-12-21 |
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