WO2007142277A1 - ヘパリン結合上皮細胞増殖因子様増殖因子に結合するモノクローナル抗体 - Google Patents
ヘパリン結合上皮細胞増殖因子様増殖因子に結合するモノクローナル抗体 Download PDFInfo
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- WO2007142277A1 WO2007142277A1 PCT/JP2007/061487 JP2007061487W WO2007142277A1 WO 2007142277 A1 WO2007142277 A1 WO 2007142277A1 JP 2007061487 W JP2007061487 W JP 2007061487W WO 2007142277 A1 WO2007142277 A1 WO 2007142277A1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K39/00—Medicinal preparations containing antigens or antibodies
- A61K39/395—Antibodies; Immunoglobulins; Immune serum, e.g. antilymphocytic serum
- A61K39/39533—Antibodies; Immunoglobulins; Immune serum, e.g. antilymphocytic serum against materials from animals
- A61K39/39558—Antibodies; Immunoglobulins; Immune serum, e.g. antilymphocytic serum against materials from animals against tumor tissues, cells, antigens
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P35/00—Antineoplastic agents
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K39/00—Medicinal preparations containing antigens or antibodies
- A61K39/395—Antibodies; Immunoglobulins; Immune serum, e.g. antilymphocytic serum
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- 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
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- 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
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- 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
- C07K16/28—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
- C07K16/30—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants from tumour cells
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K39/00—Medicinal preparations containing antigens or antibodies
- A61K2039/505—Medicinal preparations containing antigens or antibodies comprising antibodies
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2317/00—Immunoglobulins specific features
- C07K2317/20—Immunoglobulins specific features characterized by taxonomic origin
- C07K2317/24—Immunoglobulins specific features characterized by taxonomic origin containing regions, domains or residues from different species, e.g. chimeric, humanized or veneered
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- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2317/00—Immunoglobulins specific features
- C07K2317/30—Immunoglobulins specific features characterized by aspects of specificity or valency
- C07K2317/34—Identification of a linear epitope shorter than 20 amino acid residues or of a conformational epitope defined by amino acid residues
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2317/00—Immunoglobulins specific features
- C07K2317/50—Immunoglobulins specific features characterized by immunoglobulin fragments
- C07K2317/56—Immunoglobulins specific features characterized by immunoglobulin fragments variable (Fv) region, i.e. VH and/or VL
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2317/00—Immunoglobulins specific features
- C07K2317/50—Immunoglobulins specific features characterized by immunoglobulin fragments
- C07K2317/56—Immunoglobulins specific features characterized by immunoglobulin fragments variable (Fv) region, i.e. VH and/or VL
- C07K2317/565—Complementarity determining region [CDR]
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2317/00—Immunoglobulins specific features
- C07K2317/70—Immunoglobulins specific features characterized by effect upon binding to a cell or to an antigen
- C07K2317/73—Inducing cell death, e.g. apoptosis, necrosis or inhibition of cell proliferation
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2317/00—Immunoglobulins specific features
- C07K2317/70—Immunoglobulins specific features characterized by effect upon binding to a cell or to an antigen
- C07K2317/73—Inducing cell death, e.g. apoptosis, necrosis or inhibition of cell proliferation
- C07K2317/732—Antibody-dependent cellular cytotoxicity [ADCC]
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2317/00—Immunoglobulins specific features
- C07K2317/70—Immunoglobulins specific features characterized by effect upon binding to a cell or to an antigen
- C07K2317/76—Antagonist effect on antigen, e.g. neutralization or inhibition of binding
Definitions
- Monoclonal antibodies that bind to heparin-binding epidermal growth factor-like growth factor Monoclonal antibodies that bind to heparin-binding epidermal growth factor-like growth factor.
- the present invention relates to a heparin-binding epidermal growth factor-like growth factor (hereinafter referred to as "HB-EG”), membrane-type HB-EGF, which is bound to the cell membrane. And a monoclonal antibody that binds to secretory HB-EGF and an antibody fragment thereof.
- HB-EG heparin-binding epidermal growth factor-like growth factor
- HB-EGF was purified and isolated from the culture supernatant of human macrophage-like cell line U-937 differentiated into macrophages by Higashiyama et al. In 1992 (Non-patent Document 1).
- HB-EGF shares six cysteines that are conserved in the epidermal growth factor (EGF) family, and belongs to the EGF family and other proteins belonging to the EGF family. Similarly, it is synthesized as a type I membrane protein (Non-patent Documents 1 and 2).
- Membrane-type HB-EGF is activated by a variety of physiological stimuli such as heat and osmotic stress, growth factors, cytodynamic in and G protein-coupled receptor (GPCR) agonist lysophosphatidic acid (LPA) It is converted to 14-22 kilodalton (hereinafter referred to as kDa) secreted HB-EGF by the meta-metabolized protease (Non-Patent Documents 1-3).
- physiological stimuli such as heat and osmotic stress, growth factors, cytodynamic in and G protein-coupled receptor (GPCR) agonist lysophosphatidic acid (LPA) It is converted to 14-22 kilodalton (hereinafter referred to as kDa) secreted HB-EGF by the meta-metabolized protease (Non-Patent Documents 1-3).
- Non-patent document 1 EGF receptor (EGFR / ErbBl) (Non-patent document 1), ErbB4 (Non-patent document 4) and N-arginine dibasic convertase (Non-patent document 5), and fibroblasts It has a proliferation promoting activity against smooth muscle cells (Non-patent document 1), keratinocytes (Non-patent document 6), hepatocytes (Non-patent document 7), and mesangial cells (Non-patent document 8).
- Non-patent Documents 28, 29 and 31 organ formation such as heart valves (Non-patent Documents 28, 29 and 31), wound healing (Non-patent Documents 9 and 10), and smooth muscle cell hyperplasia caused by atherosclerosis (Non-patent Document 11) , Restenosis (Non-Patent Documents 12 and 13), pulmonary hypertension (Non-Patent Document 14), liver regeneration (Non-Patent Document 15), brain disorders (Non-Patent Document 16) and cancer (Non-Patent Documents 28 to 35) It is also known that HB-EGF is involved.
- Non-patent Document 17 Membrane-type HB-EGF is known to form a complex with tetraspanins such as CD9 and integrin ⁇ 3
- HB-EGF knockout mice Created HB-EGF knockout (KO) mice and analyzed the physiological functions of HB-EGF. As a result, HB-EGF KO mice showed signs of ventricular dilatation, decreased cardiac function, and heart valve hypertrophy. More than half died in the first few days of life. This indicates that HB-EGF is an essential protein for the development and function of the heart (Non-patent Document 24).
- HB-EGF HB-EGF
- HB Atm Two types of genes of HB-EGF
- HB UC- expressing mice showed symptoms similar to HB-EGF KO mice, suggesting that secreted H B-EGF functions as an active protein. Most HB Atm- expressing mice died before or during the neonatal period. Furthermore, keratinocyte hyperplasia and ventricular hypertrophy from the neonatal period were observed in HB Atm / + mice in which the mutation was introduced into only one of the alleles. These symptoms were the opposite phenotype of HB-EGF KO mice and HBue expressing mice.
- CRM197 Non-patent Document 26
- Non-patent Document 26 known as a diphtheria toxin mutant, specifically inhibits the cell growth promoting activity of HB-EGF and does not penetrate the cell membrane.
- the CRM197 is, hyperplasia and ventricular hypertrophy is a phenotype of HB Atm expressing mice since won suppressed, HB Atm generated in HB Atm expressing mice acts bind to receptors in the cell prior secretion However, it is presumed to act by binding to cell surface receptors after being secreted extracellularly. Therefore, the quantitative balance between membrane-type HB-EGF and secretory HB-EGF in vivo is essential for maintaining normal physiological functions, and membrane strength of HB-EGF is also converted to secretory in vivo. Process power is considered to be controlled. Higashiyama et al.
- Non-patent Documents 28-31). it has been reported that HB-EGF is highly expressed in various cancers such as breast cancer, liver cancer, knee cancer, bladder cancer and the like. Recently, it was revealed that HB-EGF is an important factor for cancer growth (Non-patent Documents 32 and 33).
- Mekokoro et al. Introduced HB-EGF small interference RNA (siRNA) into cancer cell lines, or transplanted cancer cell lines into mice. It was clarified that the administration of CRM197 shows a remarkable tumor growth inhibitory effect. Higashiyama et al.
- HB-EGF vascular endothelial growth factor
- VEGF vascular endothelial growth factor
- cyclin D1 expression in vitro. It revealed that. In vivo, it was also reported that increased tumorigenicity and tumor angiogenesis were observed in nude mice. Such growth-promoting action is observed only when the membrane-type HB-EGF or secretory HB-EGF gene is expressed, and is observed when the protease-resistant membrane-type HB-EGF gene is forcibly expressed. I was helped. Therefore, it was suggested that secreted HB-EGF may be an important factor related to tumor growth in ovarian cancer and bladder cancer.
- VEGF vascular endothelial growth factor
- HB-EGF expression in clinical patients Mekaroda et al. Analyzed the expression level of HB-EG F mRNA in tumor tissues of ovarian cancer patients and the concentration of secreted HB-EGF protein in ascites. Among them, only HB-EGF has been reported to be upregulated (Non-patent Document 32). Furthermore, Enomoto et al. Reported that the prognosis of ovarian cancer patients with high expression of tumor HB-EGF mRNA was worse than that of patients with low expression (Non-patent Document 34).
- Non-patent Document 35 Several polyclonal antibodies and one monoclonal antibody (both manufactured by R & D) are known as antibodies that bind to secreted HB-EGF and inhibit its activity.
- Anti HB-EGF The reclonal antibody (manufactured by R & D) is a membrane surface type HB-EG expressed in COS-7 cells.
- Non-patent Document 3 Binding to F has been reported. It is widely known that when a membrane protein is present on the surface of a cell such as cancer, a monoclonal antibody that binds to the protein can be a therapeutic agent that inhibits the proliferation of the cell (Non-patent Document 36). However, secretory HB-EGF, HB-EGF bound to cell membrane, and monoclonal antibody that binds to membrane HB-EGF have not been reported to date.
- Non-patent literature l Science, Vol. 251, 936, 1991
- Non-Patent Document 2 J. Biol. Chem. 267 (1992) 6205-6212
- Non-Patent Document 3 Nature, Vol. 402, 884, 1999
- Non-Patent Document 4 EMBO J.16 (1997) 1268-1278
- Non-Patent Document 5 EMBO J.20 (2001) 3342-3350
- Non-Patent Document 6 J. Biol. Chem. 269 (1994) 20060- 20066
- Non-Patent Document 7 Biochem Biophys. Res. Commun. 198 (1994) 25-31
- Non-Patent Document 8 J. Pathol. 189 (1999) 431-438
- Non-Patent Document 9 Proc. Natl. Acad. Sci. U.S.A. 90 (1993) 3889-3893
- Non-Patent Document 10 J. Cell Biol. 151 (2000) 209-219
- Non-Patent Document 11 J. Clin. Invest., 95, 404, 1995
- Non-Patent Document 12 Arterioscler. Thromb. Vase. Biol. 16 (1996) 1524-1531
- Non-Patent Document 13 J. Biol. Chem. 277 (2002) 37487-37491
- Non-Patent Document 14 Am. J. Pathol. 143 (1993) 784-793
- Non-Patent Document 15 Hepatology 22 (1995) 1584-1590
- Non-Patent Document 16 Brain Res. 827 (1999) 130-138
- Non-Patent Document 17 Biochem. Biophys. Acta., Vol. L333, F179, 1997
- Non-Patent Document 18 J. Cell Biol. 128 (1995) 929-938
- Non-Patent Document 19 J. Cell Biol. 129 (1995) 1691-1705
- Non-Patent Document 20 Cytokine Growth Factor Rev., Vol.ll, 335, 2000
- Non-Patent Document 21 Int. J. Cancer, Vol. 98, 505, 2002
- Non-Patent Document 22 J. Histochem. Cytochem., Vol. 49, 439, 2001
- Non-Patent Document 23 Cell, Vol. 69, 1051, 1992
- Non-Patent Document 24 PNAS, Vol.l00,3221,2003
- Non-Patent Document 26 J. Biol. Chem., Vol. 270, 1015, 1995
- Non-Patent Document 27 Nat.Med., Vol.8,35,2002
- Non-Patent Document 28 Breast Cancer Res. Treat., Vol. 67, 81, 2001
- Non-Patent Document 30 Biochem. Biophys. Res. Commun., Vol. 202, 1705, 1994
- Non-Patent Literature 36 Nat. Rev. Drug. Discov., Vol. 2, 52-62, 2003
- the present invention relates to the following (1) to (24).
- HB-EGF Heparin binding epidermal growth factor-like growth factor
- membrane type HB-EGF membrane type HB-EGF
- Complementarity determining region (hereinafter referred to as CDR) 1, CDR2 and CDR3 of antibody heavy chain variable region (hereinafter referred to as VH) are represented by SEQ ID NOs: 12, 13 and 14, respectively.
- CDR1, CDR2, and CDR3 of the light chain variable region (hereinafter referred to as VL) of the antibody include the amino acid sequences represented by SEQ ID NOs: 15, 16, and 17, respectively (1) to (7) and (11), the monoclonal antibody or the antibody fragment thereof according to item 1.
- the recombinant antibody is selected from a human chimeric antibody, a humanized antibody and a human antibody The antibody or antibody fragment thereof according to (13).
- VH force of human chimeric antibody The human chimeric antibody or the human chimeric antibody according to (14), comprising the amino acid sequence represented by SEQ ID NO: 9, and VL comprising the amino acid sequence represented by (11) Its antibody fragment.
- VH force of humanized antibody The 9th Ala of the amino acid sequence represented by SEQ ID NO: 22 or the amino acid sequence represented by SEQ ID NO: 22 is set to Thr, the 20th Val is set to Leu, and the 30th Thr is set to Arg, 38th Arg to Lys, 41st Pro to Thr, 48th Met to lie, 67th Arg to Lys, 68th Val to Ala, 70th lie to Leu.
- the ability to replace 95th Tyr with Phe and 1 18th Val with Leu which contains an amino acid sequence into which at least one selected alteration has been introduced, and
- the VL of the humanized antibody is the amino acid sequence represented by SEQ ID NO: 23 or the amino acid sequence represented by SEQ ID NO: 23, 15th Leu to Val, 19th Ala to Val, 21st lie to Met
- Antibody fragments are Fab, Fab ⁇ F (ab '), single chain antibody (scFv), dimerization V region (Diabod
- dsFv disulfide-stabilized V region
- the transformant according to (20) is cultured in a medium, and the antibody or antibody fragment thereof according to any one of (1) to (17) is produced and accumulated in the culture, The method for producing an antibody or antibody fragment thereof according to any one of (1) to (17), wherein the antibody or the antibody fragment is collected.
- a medicament comprising the antibody or antibody fragment thereof according to any one of (1) to (17) as an active ingredient.
- an antibody that binds to a cell membrane and binds to HB-EGF, membrane-type HB-EGF, and secretory HB-EGF.
- FIG. 1-1 shows the reactivity of various anti-HB-EGF monoclonal antibodies in a binding ELISA.
- the horizontal axis represents the concentration of each antibody, and the vertical axis represents the binding activity of each antibody.
- ⁇ indicates monoclonal antibody KM511, country indicates monoclonal antibody KM3566, ⁇ indicates monoclonal antibody KM356 7, ⁇ indicates monoclonal antibody KM3579, and ⁇ indicates monoclonal antibody MAB259.
- FIG. 1-2 shows the HB-EGF-EGFR binding inhibitory activity of anti-HB-EGF monoclonal antibodies KM3566, KM3567, KM3579 and MAB259.
- the horizontal axis represents the concentration of each antibody, and the vertical axis represents the binding of piotin-labeled HB-EGF in terms of fluorescence intensity.
- the horizontal line indicates the fluorescence intensity when piotin-labeled HB-EGF is added and without antibody, and the horizontal dotted line indicates the fluorescence intensity when piotin-labeled HB-EGF is not added and when no antibody is added.
- ⁇ represents monoclonal antibody KM3566
- X represents monoclonal antibody KM3567
- ⁇ represents monoclonal antibody KM3579
- country represents monoclonal antibody MAB259.
- FIG. 2-1 shows the HB-EGF neutralizing activity of various anti-HB-EGF monoclonal antibodies.
- the horizontal axis represents the concentration of each antibody, and the vertical axis represents the growth inhibition rate (%).
- ⁇ represents monoclonal antibody KM511, ⁇ represents monoclonal antibody KM3566, ⁇ represents monoclonal antibody KM3579, and ⁇ represents monoclonal antibody MAB259.
- FIG. 2-2 shows the HB-EGF neutralizing activity of various anti-HB-EGF monoclonal antibodies.
- the horizontal axis shows the concentration of each antibody, and the vertical axis shows cell proliferation.
- HB-EGF (+) indicates cell proliferation when HB-EGF is added and without antibody
- HB-EGF ( ⁇ ) indicates cell proliferation when HB-EGF is not added and when antibody is not added.
- the mouth represents the monoclonal antibody MAB259
- the country represents the monoclonal antibody KM3567
- the triangle represents the monoclonal antibody KM3566.
- FIG. 3 shows the reactivity of various anti-HB-EGF monoclonal antibodies in FCM analysis.
- the horizontal axis represents the concentration of each antibody, and the vertical axis represents the mean fluorescence intensity MFI value.
- X represents the monoclonal antibody KM511
- ⁇ represents the monoclonal antibody KM3566
- the mouth represents the monoclonal antibody KM3579
- ⁇ represents the monoclonal antibody MAB259.
- FIG. 4 shows the reactivity of various anti-HB-EGF monoclonal antibodies against MDA-MB-231 cells in FCM analysis.
- the solid line in each histogram is the negative control antibody KM511, and the broken line is the anti-antibody
- HB-EGF antibody is shown.
- A MAB529, (b) KM3566, (c) KM3567, (d) KM3579.
- FIG. 5 shows a construction process of an anti-HB-EGF chimeric antibody expression vector pKANTEX3566.
- FIG. 6 shows the electrophoresis pattern of the purified anti-HB-EGF chimeric antibody KM3966 on SDS-PAGE (using 5-20% gradient gel).
- Lane 1 shows the molecular weight marker
- lane 2 shows the anti-HB-EGF chimeric antibody KM3966 under reducing conditions
- lane 3 shows non-reducing conditions.
- a reactivity of 966 is shown.
- the vertical axis represents the number of cells, and the horizontal axis represents the fluorescence intensity.
- FIG. 8 shows the reactivity of anti-HB-EGF chimeric antibody KM3966 against human solid cancer cell lines treated with recombinant HB-EGF in flow cytometry.
- the vertical axis represents the number of cells
- the horizontal axis represents the fluorescence intensity.
- FIG. 9 shows the neutralizing activity of anti-HB-EGF chimeric antibody KM3966 against human HB-EGF.
- the vertical axis represents the absorbance value of O.D450 nm representing the number of viable cells, and the horizontal axis represents the antibody concentration. The country is negative. Control antibody human IgG mouth indicates KM3966.
- HB-EGF (—) indicates that HB-EGF is not added, and HB-EGF (+) indicates that HB-EGF is added.
- FIG. 10 shows antibody-dependent cytotoxic activity (ADCC activity) of anti-HB-EGF chimeric antibody KM3966 against human solid cancer cell line.
- the vertical axis in the figure represents the cytotoxic activity rate (%), and the horizontal axis represents the antibody concentration of the anti-HB-EGF chimeric antibody KM3966.
- the horizontal line shows the cytotoxic activity when no antibody was added.
- FIG. 11 shows antitumor activity of anti-HB-EGF chimeric antibody KM3966 in an early cancer model.
- the vertical axis in the figure represents the tumor volume, and the horizontal axis represents the number of days after cancer cell transplantation.
- ⁇ indicates PBS administration group, ⁇ indicates KM3966 10 mg / kg administration group. Bars indicate standard deviation.
- FIG. 12 shows antitumor activity of an anti-HB-EGF chimeric antibody KM3966 in an advanced cancer model.
- the vertical axis in the figure represents the tumor volume, and the horizontal axis represents the number of days after cancer cell transplantation.
- ⁇ indicates PBS administration group, ⁇ indicates KM3966 10 mg / kg administration group. Bars indicate standard deviation.
- FIG. 13 shows the reactivity of anti-HB-EGF mouse antibody KM3566 to human blood cancer cell lines by flow cytometry.
- the vertical axis represents the number of cells, and the horizontal axis represents the fluorescence intensity.
- A represents an acute myeloid leukemia cell line, and B represents a T cell leukemia cell line.
- FIG. 14 shows antibody-dependent cytotoxic activity (ADCC activity) of anti-HB-EGF chimeric antibody KM3966 against human hematological cancer cell lines.
- the vertical axis in the figure represents the cytotoxic activity rate (%), and the horizontal axis represents the antibody concentration of the anti-HB-EGF chimeric antibody KM3966.
- the horizontal line shows the cytotoxic activity when the antibody is not added.
- FIG. 15 shows the reactivity of anti-HB-EGF monoclonal antibodies KM3566, KM3579, and chimeric antibody KM3966 against mutant HB-EGF-expressing cells.
- the vertical axis of the figure shows the reactivity (%) of each antibody, and the horizontal axis shows the type of mutant HB-EGF.
- the membrane-type HB-EGF has a transmembrane domain and binds to the cell membrane, and also includes a signal sequence, a pro region, a heparin-binding domain, an EGF-like domain, and a jaxtamen blend main
- Specific examples include a polypeptide having the amino acid sequence represented by SEQ ID NO: 2.
- secretory HB-EGF refers to an extracellular domain containing an EGF-like domain in which the membrane-binding site of membrane-type HB-EGF has been cleaved with a protease or the like.
- HB-EGF bound to the cell membrane refers to HB-EGF that binds to the surface of the cell membrane due to its heteroprotein binding activity and electrostatic binding activity.
- the substance to which secretory HB-EGF binds may be any substance that exists on the cell membrane and to which secretory HB-EGF binds. More preferred is glycosaminodarlican, and particularly preferred is heparan sulfate.
- HB-EGF has an activity to bind to diphtheria toxin, EGF receptor ErbBl or ErbB4.
- membrane-type HB-EGF include the following proteins (a), (b), and (c).
- Examples of secreted HB-EGF include the following proteins (a), (b), and (c).
- the number of amino acids to be deleted, substituted, inserted and / or added is one or more, and the number is not particularly limited. However, deletion, substitution, Or it is a number which can be added, for example, 1 to several tens, preferably 1 to 20, more preferably 1 to 10, and further preferably 1 to 5.
- the protein to which diphtheria toxin, EGF receptor ErbBl or ErbB4 binds is at least 80% or more, preferably 85% or more, more preferably a protein having the amino acid sequence shown in SEQ ID NO: 2, 3, 4 or 5.
- the homology value is a value calculated using a homology search program known to those skilled in the art, and the base sequence is BLAST [Journal's ⁇ Biology (J. Mol. Biol), 215, 403 (1990)], the numerical values calculated using default parameters.
- BLAST2 Nucleic Acid Res., 25, 3389 (1997)]; Genome Res., 7, Ri 49 (1997); http: // www.ncbi.nlm.nih.gov/Education/BLASinfo/infomation3.html includes numerical values calculated using default parameters.
- the default parameters are 1 if G (Cost to open gap) is a base sequence, 11 if it is an amino acid sequence, 2 if -E (Cost to extend gap) is a base sequence, and 3 ⁇ 4r of the amino acid sequence.
- Is 1, -q (penalty for nucleotide mismatch) force 3 one r (rewara for nucleotide match) is 1, -e (expect value) force 0, and -W (wordsize) is a base sequence, 11 residues, 3 residues for amino acid residues, 20 if -y (Dropoff (X) for blast extemsions in bits) is blastn, 25 for programs other than blastn (http: ⁇ www.ncbi.nlm .nih.gov / blastcg ihelp.html) o Examples of amino acid sequence analysis software include FASTA [Methods in Enzymology, 183, 63 (1990)].
- the antibody of the present invention is a monoclonal antibody that binds to a cell membrane and binds to HB-EGF, membrane-type HB-EGF, and secretory HB-EGF, and HB-EGF bound to the cell membrane, It includes monoclonal antibodies that bind to epidermal growth factor-like domains (EGF-like domains) of membrane-type HB-EGF and secretory HB-EGF.
- EGF-like domains epidermal growth factor-like domains
- the EGF-like domain specifically includes a polypeptide having the amino acid sequence represented by SEQ ID NO: 4 or 5.
- the monoclonal antibody that binds to the EGF-like domain includes a monoclonal antibody that inhibits binding between secretory HB-EGF and HB-EG F receptor.
- Examples of antibodies that inhibit the binding between secretory HB-EGF and HB-EGF receptor include monoclonal antibodies that bind to the binding region between secretory HB-EGF and HB-EGF receptor or diphtheria toxin. It is done.
- the antibody of the present invention includes an antibody having neutralizing activity against secretory HB-EGF.
- the neutralizing activity includes the activity of suppressing the biological activity of secreted HB-EGF, for example, the activity of suppressing cell growth of cells expressing the HB-EGF receptor. I can get lost.
- a monoclonal antibody that binds to an epitope comprising at least one amino acid among amino acids 115 to 147 of the polypeptide having the amino acid represented by SEQ ID NO: 2, preferably A monoclonal antibody that binds to an epitope containing at least one amino acid from the 133rd to the 147th, more preferably the 115th, 122th, 124th, 125th, 127th, 129th, 133th, 135th, 141 A monoclonal antibody that binds to an epitope containing at least one amino acid among the amino acids 147 and 147, and more preferably at least the amino acids 133 and 135 of the 133, 135, and 147 amino acids.
- Monoclonal antibodies that bind to the containing epitopes most preferably 133, 135 and And monoclonal antibodies that bind to epitopes containing the 147th amino acid.
- Monoclonal antibodies produced by Hypridoma KM3566 (FERM BP-10490), Hypridoma KM35 67 (FERM BP-10573), and monoclonal antibodies produced by hybridoma KM3579 (FERM BP-10491).
- Monoclonal antibodies that bind to the binding epitopes are exemplified as antibodies of the present invention.
- an antibody having neutralizing activity is a monoclonal antibody that binds to an epitope containing the amino acids 133, 135, and 147 of the polypeptide having the amino acid represented by SEQ ID NO: 2.
- Examples of the monoclonal antibody of the present invention include antibodies produced by hypridoma and recombinant antibodies.
- hybridomas are monoclonals with the desired antigen specificity obtained by fusing B cells obtained by immunizing mammals other than humans with myeloma cells. A cell that produces an antibody.
- the recombinant antibody includes antibodies produced by genetic recombination, such as human chimeric antibodies, humanized antibodies, human antibodies, or antibody fragments thereof. Recombinant antibodies having characteristics of monoclonal antibodies, low antigenicity and extended blood half-life are preferred as therapeutic agents.
- recombinant antibody of the present invention include CDR1, CDR2 and CDR3 forces of VH of the antibody, amino acid sequences represented by SEQ ID NOs: 12, 13, and 14, respectively, and CDR1, CDR2 and CDR of antibody VL.
- Examples include recombinant antibodies in which CDR3 includes the amino acid sequences represented by SEQ ID NOs: 15, 16, and 17, respectively.
- the recombinant antibody of the present invention includes antibodies produced by genetic recombination, such as human chimeric antibodies, humanized antibodies, human antibodies or antibody fragments thereof.
- a human chimeric antibody is an antibody comprising VH and VL of a non-human animal antibody and a heavy chain constant region (hereinafter referred to as CH) and a light chain constant region (hereinafter referred to as CL) of a human antibody.
- CH heavy chain constant region
- CL light chain constant region
- the human chimeric antibody of the present invention can be prepared as follows. First, cDNAs encoding VH and VL are obtained from hybridomas that produce monoclonal antibodies that bind to cell membrane and bind to HB-EGF, secretory HB-EGF, and membrane HB-EGF. The obtained cDNA is inserted into an animal cell expression vector having genes encoding human antibody CH and CL, respectively, to construct a human chimeric antibody expression vector, introduced into an animal cell, and expressed. Human-type chimeric antibodies can be produced.
- the CH of the human chimeric antibody may be any as long as it belongs to human immunoglobulin (hereinafter referred to as hlg), but is preferably of the hlgG class, and hIgGl, hIgG2 belonging to the hlgG class. Any of the subclasses such as hIgG3 and hIgG4 can be used.
- the CL of the human chimeric antibody any of those belonging to hlg can be used, and those of ⁇ class or ⁇ class can be used.
- the human chimeric antibody of the present invention includes a human key antibody comprising the amino acid sequence represented by SEQ ID NO: 9 of the antibody VH and the amino acid sequence represented by SEQ ID NO: 11 of the antibody VL. Examples include melaantibodies.
- the VH of the antibody is the amino acid sequence represented by SEQ ID NO: 9.
- Specific examples of the human chimeric antibody whose antibody VL is represented by SEQ ID NO: 10 include human chimeric antibody KM3966.
- a human rabbit antibody refers to an antibody obtained by grafting the VH and VL CDR amino acid sequences of a non-human animal antibody into an appropriate position of the VH and VL of a human antibody. ⁇ reshaped— with antibodies
- the humanized antibody of the present invention can be prepared as follows. First, the VH and VL CDRs of HB-EGF, secreted HB-EGF, and secreted HB-EGF produced by Hypridoma that bind to cell membranes are optionally added. A cDNA encoding the variable region grafted on the VH and VL frameworks (hereinafter referred to as FR) of the human antibody is prepared. The prepared cDNA is inserted into animal cell expression vectors having genes encoding human antibody CH and CL to construct a humanized antibody expression vector. Next, the humanized antibody expression vector can be produced by introducing the prepared humanized antibody expression vector into animal cells to express the humanized antibody.
- FR VH and VL frameworks
- Any amino acid sequence of FRs of VH and VL of human antibodies can be used as long as the amino acid sequences of FRs of VH and VL of human antibodies.
- VH and VL FR amino acid sequences of human antibodies registered in databases such as Protein Data Bank U, 7 sequences of Proteins of Immunological Interest, US Dept.Health and Human Services (1991 The common amino acid sequences of the subgroups of human antibody VH and VL FRs, etc., as described in), etc. are used.
- the CH of the humanized antibody if it belongs to hlg! /, It may be something! /, But the hlgG class is preferable, and hIgGl, hIgG2, hIgG3, hIgG4 belonging to the hlgG class is also preferred. Any of these subclasses can be used.
- the CL of human rabbit antibody may be any of those belonging to hlg, and those of ⁇ class or e class can be used.
- the amino acid sequence represented by SEQ ID NO: 23, or the 15th Leu, 19th Ala, 21st Ile, 49th Pro and 84th Leu force in the amino acid sequence represented by SEQ ID NO: 23 Humanized antibodies each containing an amino acid sequence in which at least one amino acid residue is replaced with another amino acid residue, and the like, but the number of modifications to be introduced is not particularly limited.
- the VH of the antibody is represented by SEQ ID NO: 22 in the 20th Val, 30th Thr, 38th Arg, 48th Met, 67 Arg, 68th Val, 70th Ile, 95th Tyr, and 118th Val, preferably the 20th Val in the amino acid sequence in which the antibody VH is represented by SEQ ID NO: 22, 30th A humanized antibody having an amino acid sequence in which Thr, 48th Met, 68th Val, 70th Ile, 95th Tyr, and 118th Val are substituted with other amino acid residues.
- a humanized antibody having an amino acid sequence in which 30th Thr, 68th Val, 70th Ile, and 95th Tyr are substituted with other amino acid residues.
- a humanized antibody preferably having an amino acid sequence in which the 30th Thr, the 68th Val, and the 70th lie are substituted with other amino acid residues.
- Preferred examples include humanized antibodies containing an amino acid sequence in which the 30th Thr and the 70th lie are substituted with other amino acid residues.
- the amino acid sequence of the antibody VH obtained as a result of the above-mentioned amino acid modification is represented by the 9th Ala in the amino acid sequence represented by SEQ ID NO: 22 as Thr, the 20th Val in Leu, and the 30th Thr to Arg, 38th Arg to Lys, 41st Pro to Thr, 48th Met to lie, 6th Arg to Lys, 68th Val to Ala, 70th lie
- An amino acid sequence in which at least one modification is also introduced, in which the modification ability of substituting L to, 95th Tyr to Phe, and 118th Val to Leu is also selected.
- the 9th Ala in the amino acid sequence represented by SEQ ID NO: 22 is Thr
- the 20th Val is Leu
- 30th Thr To Arg 38th Arg to Lys
- 41st Pro to Thr 48th Met to lie
- 67th Arg to Lys 68th Val to Ala
- 70th lie to Leu
- the amino acid sequence in which 95th Tyr is substituted with Phe and 118th Val is replaced with Leu.
- the 9th Ala in the amino acid sequence represented by SEQ ID NO: 22 is Thr
- the 20th Val is Leu
- 30th Thr to Arg 38th Arg to Lys
- 41st Pro to Thr
- 48th Met to lie
- 67th Arg to Lys 68th Val to Ala
- 70th Amino acid sequences in which lie is replaced with Leu and 95th Tyr is replaced with Ph e.
- the amino acid sequence of VH into which nine modifications have been introduced specifically, the 9th Ala in the amino acid sequence represented by SEQ ID NO: 22 is Thr, the 20th Val is Leu, 30th Thr to A rg, 41st Pro to Thr, 48th Met to lie, 67th Arg to Lys, 68th Val to Ala, 70th lie to Leu, And amino acid sequence with 95th Tyr replaced with Phe, 20th Val to Leu, 30th Thr to Arg, 38th Arg to Lys, 48th Met to lie, 67th Arg The amino acid sequence is substituted with Lys, 68th Val with Ala, 70th lie with Leu, 95th Tyr with Phe, and 118th Val with Leu.
- amino acid sequence of VH into which seven modifications have been introduced is specifically represented by SEQ ID NO: 22.
- amino acid sequence of VH into which seven modifications have been introduced is specifically represented by SEQ ID NO: 22.
- the 30th Thr is replaced with Arg
- the 48th Met is replaced with lie
- the 68th Val is replaced with Ala
- the 70th lie is replaced with Leu
- the 95th Tyr is replaced with Phe.
- amino acid sequence of VH into which three modifications are introduced is the amino acid sequence represented by SEQ ID NO: 22.
- amino acid sequence of VH into which one modification has been introduced is specifically represented by SEQ ID NO: 22.
- amino acid sequence of VH into which one modification has been introduced is specifically represented by SEQ ID NO: 22.
- amino acid sequence in which the 9th Ala is replaced with Thr an amino acid sequence in which the 20th Val is replaced with Leu, an amino acid sequence in which the 30th Thr is replaced with Arg, an amino acid sequence in which the 38th Arg is replaced with Lys, Amino acid sequence in which 41st Pro is replaced with Thr, amino acid sequence in which 48th Met is replaced with lie, amino acid sequence in which 67th Arg is replaced with Lys, and amino acid sequence in which 68th Val is replaced with Ala
- An amino acid sequence in which the 70th lie is replaced with Leu
- an amino acid sequence in which the 95th Tyr is replaced with Phe an amino acid sequence in which the 118th Val is replaced with Leu.
- VL of the antibody for example, the amino acid sequence in which the 15th Leu, the 19th Ala, the 21st Ile, and the 84th Leu in the amino acid sequence represented by SEQ ID NO: 23 are substituted. can give.
- Preferred is an amino acid sequence in which 19th Ala, 21st Ile, and 84th Leu are substituted.
- the 15th Leu in the amino acid sequence represented by SEQ ID NO: 23 is Val
- the 19th Ala is Val
- the 21st lie is Met
- Examples include amino acid sequences in which at least one modification selected from the modification in which the 49th Pro is replaced with Ser and the 84th Leu is replaced with Val is introduced.
- the 15th Leu in the amino acid sequence represented by SEQ ID NO: 23 is Val
- the 19th Ala is Val
- Examples include amino acid sequences in which the 21st lie is replaced by Met, the 49th Pro is replaced by Ser, and the 84th Leu is replaced by Val.
- amino acid sequence of VL into which four modifications have been introduced is the amino acid sequence represented by SEQ ID NO: 23.
- amino acid sequence of VL introduced with three modifications is the amino acid sequence represented by SEQ ID NO: 23.
- amino acid sequence of VL into which one modification has been introduced is the amino acid sequence represented by SEQ ID NO: 23.
- Amino acid sequence in which the 15th Leu is replaced with Val an amino acid sequence in which the 19th Ala is replaced with Val, an amino acid sequence in which the 21st lie is replaced with Met, an amino acid sequence in which the 49th Pro is replaced with Ser, And an amino acid sequence in which 84th Leu is substituted with Val, and the like.
- humanized antibody of the present invention include a humanized antibody whose variable regions have the amino acid sequences represented by SEQ ID NOs: 22 and 23.
- a human antibody originally refers to an antibody that naturally exists in the human body, but a human antibody phage library prepared by recent advances in genetic engineering, cell engineering, and developmental engineering. The antibody etc. which can also obtain transgenic animal power are also included.
- the antibody present in the human body can be isolated and cultured, for example, by isolating human peripheral blood lymphocytes, immortalizing by infecting EB virus or the like, and cloning. The antibody can be purified from the culture supernatant.
- the human antibody phage library inserts an antibody gene prepared for human B cell power into the phage gene. This is a library in which antibody fragments such as ab and scFv are expressed on the phage surface.
- phages expressing an antibody fragment having a desired antigen-binding activity on the surface can be collected using the binding activity to the substrate on which the antigen is immobilized as an index.
- the antibody fragment can be further converted into a human antibody molecule comprising two complete heavy chains and two complete light chains by genetic engineering techniques.
- a human antibody-producing transgenic animal means an animal in which a human antibody gene is integrated into the genome gene of a host animal.
- a human antibody-producing transgenic mouse can be produced by introducing a human antibody gene into mouse ES cells, and transplanting the ES cells into an early mouse embryo, followed by generation.
- Human antibodies can be produced from human antibody-producing transgenic animals by obtaining and culturing human antibody-producing hybridomas and hybridomas by the conventional hyperidoma production method for animals other than humans. Human antibodies can be generated and accumulated during cleansing.
- the number of amino acids to be deleted, substituted, inserted and Z or added is one or more, and the number is not particularly limited, but the molecular 'Crowing 2nd Edition, Current' Protocols 'in. Molecular' Biology, Nucleic Acids Research, 10, 6487 (1982), Proc. Natl. Acad. Sci., USA, 79, 6409 (1982), Gene, 34, 315 (1985), Nucleic Acids Research, 13, 4431 (1985), Proc. Natl. Acad. Sci USA. 82, 488 (1985), etc.
- the number is such that it can be deleted, substituted or added by known techniques such as site-directed mutagenesis. For example, it is 1 to several tens, preferably 1 to 20, more preferably 1 to 10, and further preferably 1 to 5.
- Deletion, substitution, insertion or addition of one or more amino acid residues in the above-described antibody amino acid sequence indicates the following. It means that there is a deletion, substitution, insertion or attachment force S of one or more amino acid residues in any and one or more amino acid sequences in the same sequence. In addition, deletion, substitution, insertion or addition may occur simultaneously, and the amino acid residue to be substituted, inserted or added may be either a natural type or a non-natural type. .
- Natural amino acid residues include L-alanine, L-asparagine, L-aspartic acid, L-glutamine, L-glutamic acid, glycine, L-histidine, L-isoleucine, L-leucine, L-lysine, L -Methionine, L-phenylalanine, L-proline, L-serine, L-threonine, L-tryptophan, L-tyrosine, L-parin and L-cysteine.
- amino acid residues that can be substituted with each other are shown below.
- the amino acid residues contained in the same group can be substituted for each other.
- Group A Leucine, Isoleucine, Norleucine, Norin, Norpaline, Alanine, 2-Aminobutanoic acid, Methionine, 0-Methylserine, t-Butylglycine, t-Butylalanine, Cyclohexinolealanine
- Group B aspartic acid, glutamic acid, isoaspartic acid, isoglutamic acid, 2-amino adipic acid, 2-aminosuberic acid
- Group D lysine, arginine, ornithine, 2,4-dianaminobutanoic acid, 2,3-dianaminopropionic acid
- Group E proline, 3-hydroxyproline, 4-hydroxyproline
- Group F serine, threonine, homoserine
- antibody fragment of the present invention examples include Fab, Fab ⁇ F (ab '), scFv, diabodv, dsFv and the like.
- Fab is obtained by treating an IgG antibody molecule with the proteolytic enzyme papain.
- the Fab of the present invention can be obtained by treating an antibody with the proteolytic enzyme papain.
- the DNA encoding the Fab of the antibody is inserted into a prokaryotic expression vector or a eukaryotic expression vector, and the vector is introduced into a prokaryotic or eukaryotic organism to express the Fab. can do.
- F (ab ') is a fragment obtained by treating an IgG antibody molecule with the proteolytic enzyme pepsin.
- Antibody fragment (which is cleaved at the 234th amino acid residue of the H chain), whose Fab is slightly larger than that bound through the disulfide bond in the hinge region, and has an antigen binding activity of about 100,000 molecular weight It is.
- the F (a) of the present invention can be obtained by treating an antibody with the proteolytic enzyme pepsin.
- the following Fab ′ can be produced by thioether bond or disulfide bond.
- Fab ' is an anti-antibody having a molecular weight of about 50,000, which is obtained by cleaving the disulfide bond in the hinge region of F (a).
- the Fa of the present invention can be obtained by treating F (ab ′) with a reducing agent dithiothreitol.
- the DNA encoding the Fab ′ fragment of the antibody is inserted into a prokaryotic expression vector or eukaryotic expression vector, and Fa is expressed by introducing the vector into a prokaryotic or eukaryotic organism. can do.
- scFv is a VH-P-VL or VL-P-VH polypeptide in which one VH and one VL are linked using an appropriate peptide linker (hereinafter referred to as P).
- P an appropriate peptide linker
- the scFv of the present invention obtains cDNA encoding the antibody VH and VL, constructs a DNA encoding scFv, inserts the DNA into a prokaryotic expression vector or eukaryotic expression vector, and the expression vector ScFv can be expressed and produced by introducing into a prokaryotic or eukaryotic organism.
- a diabody is an antibody fragment in which scFv is dimerized, and is an antibody fragment having a bivalent antigen-binding activity.
- the bivalent antigen binding activity can be the same, or one can be a different antigen binding activity.
- the diabody of the present invention obtains cDNA encoding the antibody VH and VL, constructs the DNA encoding scFv so that the length of the amino acid sequence of the linker is 8 residues or less, and the DNA is prokaryotic. By inserting the expression vector into a biological expression vector or eukaryotic expression vector, and introducing the expression vector into a prokaryotic or eukaryotic organism, the diabody can be expressed and produced.
- dsFv is obtained by binding a polypeptide in which one amino acid residue in each of VH and VL is substituted with a cysteine residue via a disulfide bond between the cysteine residues.
- the amino acid residue substituted for the cysteine residue was determined by the method described by Reiter et al. (Protein Enginee ring, 7, 697-704, 1994), and can be selected based on the prediction of the three-dimensional structure of the antibody.
- the dsFv of the present invention obtains cDNA encoding the antibody VH and VL, constructs a DNA encoding the dsFv, inserts the DNA into a prokaryotic expression vector or eukaryotic expression vector, DsFv can be expressed and produced by introducing an expression vector into prokaryotes or eukaryotes.
- the derivative of the antibody of the present invention is the N-terminal of the H chain or L chain of an antibody or antibody fragment that specifically binds to HB-EGF, membrane HB-EGF and secretory HB-EGF bound to the cell membrane.
- the drug is bound to the side or C-terminal side, appropriate substituents or side chains in the antibody, and sugar chains in the antibody by chemical techniques (Introduction to Antibody Engineering, Osamu Kanmitsu, Jinshokan, 1994). It can be manufactured from a combination of cocoons.
- ⁇ protein bound to a cell membrane and bound to DNA encoding the antibody or the antibody fragment that specifically binds to HB-EGF, membrane-type HB-EGF, and secretory-type HB-EGF It can also be produced by a genetic engineering technique in which DNA encoding a drug such as ligated is inserted into an expression vector, and the expression vector is introduced into a host cell.
- a drug such as ligated
- the expression vector is introduced into a host cell.
- the drug include chemotherapeutic agents, antibody drugs, immunostimulants such as cyto force-in, radioactive equivalent elements, and immunoadjuvant.
- the agent bound to the antibody or the antibody fragment may be in the form of a prodrug.
- the prodrug in the present invention refers to a drug that is chemically modified by an enzyme or the like present in a tumor environment and converted into a substance having an action of damaging cancer cells.
- Chemotherapeutic agents include alkylating agents, nitrosourea agents, antimetabolites, anticancer antibiotics, plant-derived alkaloids, topoisomerase inhibitors, hormone therapy agents, hormone antagonists, aromatase inhibitors, p-glycoprotein inhibitors, Any chemotherapeutic agent is included, such as platinum complex derivatives, M phase inhibitors, kinase inhibitors and the like.
- Chemotherapeutic agents include amifostine (Ethiol), cisplatin, dacarbazine (DTIC), dactinomycin, metalloretamine (nitrogen mustard), streptozocin, cyclophosphamide, ifosfamide, carmustine (BCNU), oral mucin (CCNU) ), Doxorubicin (adriamycin), doki Sorbicin lipo (doxyl), epilubicin, gemcitabine (gemzar), daunorubicin, daunorubicin lipo (daunosome), procarbazine, mitomycin, cytarabine, etoposide, methotrexate, 5-fluorouracil, fluorouracil, vinblastinobu, myelin Estramustine, paclitaxel (taxinol), docetaxel (taxotere), aldesleukin, asparaginase, busulfan, carboplatin, oxa
- a method of binding the chemotherapeutic agent and the antibody a method of binding between the amino group of the chemotherapeutic agent and the antibody via dartal aldehyde, an amino group of the chemotherapeutic agent via a water-soluble carpositimide Examples thereof include a method for binding a carboxyl group of an antibody.
- Antibody drugs include antibodies against antigens whose apoptosis is induced by antibody binding, or antibodies against antigens involved in tumor pathogenesis such as tumor cell growth and metastasis, as well as antibodies that regulate immune function, lesion sites And antibodies that inhibit angiogenesis in the body.
- Cluster of differentiation As an antigen whose apoptosis is induced by antibody binding, Cluster of differentiation
- CD human leukocyte antigen
- CD20 CD21, CD22, CD23, CD24, CD37, CD53, CD72, CD73, CD74, CDw75, CDw76, CD77, CDw78, CD79a, CD79b, CD80 (B7.1), CD81, CD82 CD83, CDw84, CD85, CD86 (B7.2), human leukocyte antigen (HLA) -Class II, EGFR, etc.
- HLA human leukocyte antigen
- Antibody antigens that regulate immune function include CD4, CD40, CD40 ligand, B7 family single molecule (CD80, CD86, CD274, B7-DC, B7-H2, B7-H3, B7-H4), B7 family molecules Ligand (CD28, CTLA-4, ICOS ⁇ PD-1, BTLA), OX-40, OX-40 ligand, CD137, tumor necrosis factor (TNF) receptor family molecule (DR4, DR5, TNFR1, TNFR2), T NF — Related apoptosis— inducing ligand receptor (TRAIL) family molecule, TRAIL family Single molecule receptor family (TRAIL-Rl, TRAIL-R2, TRAIL-R3, TRAIL-R4), recepto r activator of nuclear factor kappa B ligand (RANK ), RANK ligand, CD25, folate receptor 4, cyto force in (interleukin-1a (hereinafter referred to as interleukin), IL
- Antigens of antibodies that inhibit angiogenesis at the lesion include vascular endothelial growth factor (VEGF), Angiopoietin, fibroblast growth factor (FGF, EGF, platelet-derived growth factor (PDGF), insulin-like growth factor) (IGF), erythropoietin (EPO), TGF ⁇ , IL-8, Ephilin, SDF-1, and the like and their receptors.
- VEGF vascular endothelial growth factor
- Angiopoietin fibroblast growth factor
- FGF fibroblast growth factor
- EGF platelet-derived growth factor
- IGF insulin-like growth factor
- EPO erythropoietin
- TGF ⁇ IL-8
- Ephilin Ephilin
- SDF-1 and the like and their receptors.
- Immunostimulators include sites that enhance cells such as NK cells, macrophages, and neutrophils Any force-in can be used, but specific examples include interferon (hereinafter referred to as INF) — ⁇ , INF—j8, INF— ⁇ , IL-2, IL-12, IL-15, IL— 18, IL-21, IL-23, granulocyte stimulating factor (G-CSF), granulocyte / macrophage stimulating factor (GM-CSF), macrophage stimulating factor (M-CSF) and the like.
- INF interferon
- G-CSF granulocyte stimulating factor
- GM-CSF granulocyte / macrophage stimulating factor
- M-CSF macrophage stimulating factor
- drugs that enhance immunity include j8 (l ⁇ 3) dulcan (lentinan, schizophyllan), ⁇ -galactosylceramide (KRN7000), bacterial cells
- examples include powder (picibanil, BCG) and cell extract (krestin).
- the radioactive isotope can be directly bound to the antibody by the chloramine T method or the like.
- a substance that chelates a radioisotope may be bound to the antibody.
- the sharpening agent include methylbenzyldiethylene-tnaminepentaacetic acid, MX-DTPA) and the like.
- the antibody of the present invention can be administered in combination with one or more other drugs, or radiation irradiation can be combined.
- other drugs include the aforementioned chemotherapeutic agents, antibody drugs, and immunostimulants such as cytodynamic force.
- antibody drugs include antibodies against antigens that can be the above targets, such as EG FR antibodies (Cetuximab, Panitumumab, Matuzumab, etc.) and the like.
- Radiation irradiation includes photon (electromagnetic wave) irradiation such as X-ray and ⁇ -ray, particle beam irradiation such as electron beam, proton beam, and heavy particle beam.
- the method of administration in combination may be simultaneous administration with the antibody of the present invention, or may be administered before or after administration of the antibody of the present invention.
- An expression vector containing a cDNA encoding a secreted ⁇ -EGF or a partial length of a secreted ⁇ -EGF (hereinafter sometimes simply referred to as a secreted ⁇ - ⁇ GF) is used in Escherichia coli, yeast, insect cells, animal cells. Or the like and secreted HB-EGF or a secreted HB-EGF partial fragment can be obtained. Further, HB-EGF in the extracellular region can be purified from cells expressing HB-EGF by protease treatment. Secretory type It is also possible to purify secretory HB-EGF by expressing HB-EGF in a large amount and cultivating various human tumor cultured cells and human tissues. Furthermore, a synthetic peptide having a secretory HB-EGF partial sequence can be prepared and used as an antigen.
- the secretory HB-EGF used in the present invention includes Molecular Cloning, A Laboratory Manual, Second Edition, Cola Spring Harbor Laooratory Press (1989), Current Protocols in Molecular Biology, John Wiley & Sons. (1987-1997) etc. can be used to produce a DNA encoding the same in a host cell by, for example, the following method.
- a recombinant vector is prepared by inserting the full-length cDNA downstream of the promoter of an appropriate expression vector.
- a DNA fragment of an appropriate length containing a portion encoding HB-EGF may be prepared based on the full-length cDNA, and the DNA fragment may be used in place of the full-length cDNA.
- the recombinant vector is introduced into a host cell suitable for the expression vector, whereby a transformant producing HB-EGF can be obtained.
- any strain can be used as long as it can express the target gene, such as Escherichia coli and animal cells.
- An expression vector contains an appropriate promoter at a position where it can autonomously replicate in the host cell to be used or can be integrated into a chromosome and can transcribe DNA encoding secretory HB-EGF. Used.
- the recombinant vector containing DNA encoding HB-EGF used in the present invention can be autonomously replicated in the prokaryote.
- a vector comprising a promoter, a ribosome binding sequence, the DNA used in the present invention and a transcription termination sequence is preferred.
- the recombinant vector may contain a gene that controls the promoter.
- Examples of expression vectors include pBTrp2, pBTacl, pBTac2 (all manufactured by Roche Diagnostics), pKK233-2 (manufactured by Pharmacia), pSE280 (manufactured by Invitrogen), pGEMEX-1 (manufactured by Promega) , PQE-8 (manufactured by QIAGEN), pKYPIO (JP-A 58-110600), pKYP200 [Agricultural Biological Chemistry, 48, 669 (1984)], pLSAl [Agric. Biol. Chem., 53, 2 77 (1989)], pGELl [Proc. Natl. Acad. Sci.
- Any promoter can be used as long as it can function in the host cell to be used.
- promoters derived from Escherichia coli or phage such as trp promoter (Ptrp), lac promoter, PL promoter, PR promoter, T7 promoter and the like can be mentioned.
- artificially modified promoters such as a tandem promoter, tac promoter, lacT7 promoter, let I promoter, etc. in which two Ptrps are connected in series can also be used.
- Shine'Dalgarno which is a ribosome binding sequence is used.
- a plasmid in which the distance between the sequence and the start codon is adjusted to an appropriate distance (eg, 6 to 18 bases).
- the base sequence of the DNA encoding the secretory HB-EGF used in the present invention the base can be substituted so as to be an optimal codon for expression in the host.
- the production rate of secretory HB-EGF can be improved.
- a transcription termination sequence is not always necessary for gene expression in the above recombinant vector! However, it is preferable to place a transcription termination sequence immediately below the structural gene.
- Examples of host cells include microorganisms belonging to the genus Escherichia, such as E. coli XL1-Blue, E. coli XL2-Blue, E. coli DH1, E. coli DH5 a, E. coli BL21 (DE3), E. coli MC1000, E. coli KY3276, E. coli W1485 E. coli JM109, E. coli HB101, E. coli No. 49, E. coli W3110, E. coli NY49 and the like.
- microorganisms belonging to the genus Escherichia such as E. coli XL1-Blue, E. coli XL2-Blue, E. coli DH1, E. coli DH5 a, E. coli BL21 (DE3), E. coli MC1000, E. coli KY3276, E. coli W1485 E. coli JM109, E. coli HB101, E. coli No. 49,
- any method can be used as long as it is a method for introducing DNA into the above host cell.
- a method using calcium ions [Proc. Natl. Ac ad. Sci. USA, 69, 2110 (1972)], Gene, 17, 107 (1982) and Molecular & General Genetics, 168, 111 (1979).
- examples of expression vectors include pcDNAU pcD M8 (commercially available from Funakoshi), pAGE107 [JP-A-3-22979; Cytotechnology, 3, 133, (19 90)], pAS3 -3 (JP-A-2-227075), pCDM8 [Nature, 329, 840, (1987)], pcDNAI / Amp (Invitrogen), pREP4 (Invitrogen), pAGE103 [J. Biochemistry, 101, 13 07 (1987)], pAGE210, pME18SFL3 and the like.
- Any promoter can be used as long as it can function in animal cells.
- a cytomegalovirus (CMV) IE (immediate early) gene promoter examples include promoters, retrovirus promoters, metallotine promoters, heat shock promoters, SRa promoters, and the like.
- an enhancer of the IE gene of human CMV may be used together with a promoter.
- Host cells include human cells such as Namalwa cells, monkey cells, COS cells, Chinese cells, CHO cells that are Muster cells, and HBT5637 (Japanese Patent Laid-Open No. 63-299). Etc.
- any method for introducing the recombinant vector any method can be used as long as it is a method for introducing DNA into animal cells.
- the electopore position method [Cytotechnology, 3, 133 (1990)]
- the calcium phosphate method Japanese Patent Application Laid-Open No. Hei 9) 2-227075
- ribofusion method Proc. Natl. Acad. Sci. USA, 84, 7413 (1987)] and the like.
- gene expression methods include secretory production, fusion protein, and the like according to the method described in Molecular Cloning, A Laboratory Manual, Second Edition, Cold bpnng Harbor Laboratory Press (1989). Expression or the like can be performed. When expressed in cells derived from eukaryotes, secreted HB-EGF to which sugars or sugar chains are added can be obtained.
- the secreted HB-EGF is produced by culturing the transformant obtained as described above in a medium, producing and accumulating the HB-EGF in the culture, and collecting the transformant from the culture.
- the method of culturing the transformant in a medium can be carried out according to a usual method used for culturing a host.
- an inducer may be added to the medium as necessary.
- isopropyl ⁇ D thiogalatatopyranoside or the like is used for culturing a microorganism transformed with a recombinant vector using the trp promoter.
- Etc. may be added to the medium.
- a medium for culturing a transformant obtained using animal cells as a host a commonly used RPMI 1640 medium [The Journal of the American Medical Association, 199, 519 (1967)], Eagle's MEM Medium [Science, 122, 501 (1952)], Dulbecco's modified MEM medium [V irology, 8, 396 (1959)], 199 medium [Proc. Soc. Exp. Biol. Med., 73, 1 (1950)] or A medium obtained by adding fetal calf serum or the like to these mediums can be used. Cultivation is usually carried out for 1 to 7 days under conditions such as pH 6 to 8, 30 to 40 ° C, and 5% CO. Also, if necessary during culture
- antibiotics such as kanamycin and penicillin may be added to the medium.
- a transformant derived from a microorganism, an animal cell, or the like having a recombinant vector incorporating a DNA encoding the secretory HB-EGF used in the present invention is used in a normal culture method.
- the secretory HB-EGF used in the present invention can be produced by culturing according to the above, producing and accumulating the HB-EGF, and collecting the HB-EGF from the culture.
- gene expression methods include secretory production, fusion protein expression, etc. according to the methods described in ci in Molecular Cloning, A Laboratory Manual, Second Edition, Cold bpnng Harbor Laboratory Press (1989). It can be carried out.
- a method for producing secretory HB-EGF there are a method for producing it in a host cell, a method for producing it secreted outside the host cell, and a method for producing it on the outer membrane of the host cell. By changing the structure of the secreted HB-EGF to be produced, an appropriate method can be selected.
- the production amount can also be increased using a gene amplification system using a dihydrofolate reductase gene or the like.
- Secreted HB-EGF can be isolated and purified as follows, for example. When secreted HB-EGF is expressed in cells in a dissolved state, the cells are collected by centrifugation after culturing, suspended in an aqueous buffer solution, and then sonicated by an ultrasonic crusher, French press, or Manton Gaurin homogenate. The cells are crushed with dynomill or the like to obtain a cell-free extract.
- an ordinary enzyme isolation and purification method that is, a solvent extraction method, a salting-out method using ammonium sulfate, a desalting method, a precipitation method using an organic solvent, Anion exchange chromatography using resin such as tilaminoethyl (DE AE) -Sepharose, DIAION HPA-75 (Mitsubishi Chemical), and cation using resin such as S-Sepharose FF (Pharmacia) Exchange chromatography method, hydrophobic chromatography method using resins such as butyl sepharose and ferrule sepharose, gel filtration method using molecular sieve, affinity mouthmatography method, chromatofocusing method, isoelectric focusing, etc.
- a purified sample can be obtained by using a method such as electrophoresis method alone or in combination.
- HB-EGF When secreted HB-EGF is expressed in the form of an insoluble substance in the cells, the cells are similarly collected, disrupted, and centrifuged to obtain a precipitate fraction of the HB-EGF. Collect insoluble material. The recovered insoluble matter of the protein is dissolved with a protein denaturant. By diluting or dialyzing the soluble solution, the protein is returned to a normal three-dimensional structure, and then a purified preparation of secreted HB-EGF can be obtained by the same isolation and purification method as described above.
- the derivative such as HB-EGF or a sugar modified product thereof can be recovered from the culture supernatant. That is, a soluble fraction is obtained by treating the culture by a technique such as centrifugation as described above, and a purified sample is obtained from the soluble fraction by using the same isolation and purification method as described above. Obtainable.
- the secretory HB-EGF used in the present invention can also be obtained by chemical synthesis methods such as the Fmoc method (fluorenylmethyloxycarbon method) and the tBoc method (t-butyloxycarbol method). Can be manufactured. Advanced ChemTech, Perkin 'Elma Company, Chemical synthesis can also be performed using peptide synthesizers such as Pharmacia, Protein Technology Instrument, Synthece U—Vega, PerSeptive, Shimadzu Corporation.
- mice, rats, or hamsters 3 to 20 weeks old are immunized with the antigen prepared as described above, and antibody-producing cells in the spleen, lymph nodes, and peripheral blood of the animal are collected.
- HB-EGF knockout mice are used as immunized animals when the immunogenicity is low and sufficient increase in antibody titer is not observed in the above animals.
- Immunization is carried out by administering the antigen subcutaneously, intravenously or intraperitoneally with an appropriate adjuvant (for example, Freund's complete adjuvant, aluminum hydroxide gel and pertussis vaccine, etc.). Is administered.
- an appropriate adjuvant for example, Freund's complete adjuvant, aluminum hydroxide gel and pertussis vaccine, etc.
- the antigen is a partial peptide
- a conjugate with a carrier protein such as BSA (Cushi serum albumin) or KLH (Keyhole Limpet Hemocyanin) is prepared and used as an immunogen.
- BSA Cushi serum albumin
- KLH Keyhole Limpet Hemocyanin
- the antigen is administered 5 to 10 times every 1 to 2 weeks after the first administration. Three to seven days after each administration, blood is collected from the fundus venous plexus, and the serum reacts with the antigen by an enzyme immunoassay [Anti bodies-A Laboratory Manual, Cold bpnng Haroor Laboratory, 1988]. Mice, rats, or hamsters whose sera showed sufficient antibody titers against the antigen used for immunization are provided as a source of splenocytes.
- the spleen When subjecting the spleen cells to myeloma cell fusion, 3 to 7 days after the final administration of the antigen substance, the spleen is removed from the immunized mouse, rat or hamster, and the spleen cells are collected. Shred spleen in MEM medium (Nissui Pharmaceutical Co., Ltd.), loosen with tweezers, centrifuge (1200 rpm, 5 minutes), discard supernatant, Tris monosalt-ammum buffer Treat with (pH7.65) for 1-2 minutes to remove red blood cells, wash 3 times with MEM medium, and provide as splenocytes for fusion.
- MEM medium Nasui Pharmaceutical Co., Ltd.
- myeloma cells cell lines obtained from mice are used. For example, 8-azaguanine resistant mice (derived from BALB / c) myeloma cell line P3- X63Ag8- Ul (P3-U1) (Current Topics in Microbiology and Immunology, 18: 1-7, 1978), P3- NSl / 1- Ag41 (NS-1) (European J.
- 8-Azagu Anin medium [RPMI-1640 medium glutamine (1.5 mM), 2-mercaptoethanol (5 X 10- 5 M), gentamicin (10 g / mL) and fetal calf serum (FCS ) Added to the medium (hereinafter referred to as the normal medium) and the medium supplemented with 8-azaguanine (15 g / mL)] Passed to the normal medium 3-4 days before cell fusion. Secure a cell count of at least 2 x 10 7 cells on the day of fusion.
- MEM medium or PBS diisodium phosphate 1.83 g, monopotassium phosphate 0.21 g, sodium chloride 7.65 g, distilled water 1 L, pH 7.2.
- myeloma cells 5-10:
- cloning was repeated twice by the limiting dilution method (the first time using HT medium (the medium in which HAT medium power is also removed from aminopterin) and the second time using normal medium). Are selected as monoclonal antibody-producing hyperpridoma strains.
- This mouse also collects ascites, centrifuged (3,000 rpm, 5 minutes) to remove solids, and then prayed with 40-50% ammonium sulfate, followed by force prillic acid precipitation, DEAE-Sepharose column, protein Purify with A-column or gel filtration column, collect IgG or IgM fractions, and use as purified monoclonal antibody.
- the subclass of the antibody is determined by an enzyme immunoassay using a subclustering kit.
- the amount of protein is quantified using the Raleigh method and absorbance at 280 ° C.
- an antigen a gene-transferred cell obtained by introducing an expression vector containing cDNA encoding HB-EGF used in the present invention into Escherichia coli, yeast, insect cells, animal cells, etc. by the method described in (1).
- a conjugate with a carrier protein such as BSA (Ushi Serum Albumin) or KLH (Keyhole Limpet Hemocyanin) is prepared and used.
- HB-EGF and cell lines in which HB-EGF are bound to cells are dispensed into 96-well plates and solidified. Dispense the serum, the culture supernatant of a hyperidoma that produces monoclonal antibodies, or purified antibody to react. After washing well with PBS or PBS-0.05% Tween, anti-immunoglobulin antibody labeled with piotin, enzyme, chemiluminescent substance or radiation compound as a second antibody is dispensed and reacted. After washing well with PBS-Tween, perform the reaction according to the labeling substance of the second antibody.
- a hybridoma or purified antibody that produces a monoclonal antibody reactive to any of HB-EGF, secretory HB-EGF, and membrane HB-EGF bound to the cell membrane by the method described above Can be selected.
- the binding of secreted HB-EGF to the HB-EGF receptor is inhibited.
- the harmful antibodies include monoclonal antibodies KM3566 produced by the hybridoma cell line KM3566, monoclonal antibodies KM3567 produced by the hyperidoma cell line KM3567, and monoclonal antibodies produced by the hyperidoma KM3579.
- the Hypridoma cell line KM3579 was established on January 24, 2006 in accordance with the Budapest Treaty. The National Institute of Advanced Industrial Science and Technology, Patent Biological Deposit Center (1st, 1st, Tsukuba, Ibaraki, Japan, 1st, 6th) Deposited as BP-10491.
- the cell used in the cell growth inhibition assay may be any cell as long as it has a receptor capable of binding to secretory HB-EGF.
- the EGF receptor gene And a cell line obtained by introducing a mouse myeloid cell line 32D clone3 (ATCC No. CRL-11346).
- the above cell line is prepared and cultured.
- the cell growth inhibition rate can be determined.
- a monoclonal antibody having a high cell growth inhibition rate can be selected as a monoclonal antibody having neutralizing activity.
- monoclonal antibody having neutralizing activity of the present invention include monoclonal antibody KM3566 produced by Hypridoma cell line KM3566 and monoclonal antibody KM3567 produced by Hypridoma cell line KM3567.
- Hypridoma cell lines KM3566 and KM3567 are registered with the Patent Organism Depositary (Tsukuba, Ibaraki, Japan) on January 24, 2006 and March 23, 2006, respectively, based on the Budapest Treaty. It is deposited as FERM BP-10490 and FERM BP-10573 at 1st, 1st East, 1st Central 6).
- a humanized antibody expression vector may be any animal cell expression vector into which a gene encoding CH and Z or CL of a human antibody is incorporated! /.
- a humanized antibody expression vector can be constructed by cloning a gene encoding human antibody CH and CL into an animal cell expression vector.
- the C region of the human antibody can be CH and CL of any human antibody, for example, the C region of the IgGl subclass of the H chain of the human antibody (hereinafter referred to as hC y 1) and the human antibody. C region of the ⁇ class of the L chain (hereinafter referred to as “hC ⁇ ”). Exon and intron chromosomal DNA can be used as the gene encoding human antibody CH and CL, and cDNA can also be used.
- Any expression vector for animal cells can be used as long as it can incorporate and express a gene encoding the C region of a human antibody.
- pAGE107 (Cytotechnology, 3, 133-140, 1990)
- pAGEl 03 (Journal of Biochemistry, 101, 1307-131 0, 1987)
- pHSG274 (Gene, 27, 223-232, 1984)
- pKCR Proceedings of The National Academy of Sciences of the United States of America, 78, 1527-1531, 1981
- pSGl J8 d2-4 (Cytotechnology, 4, 173-180, 1990).
- Promoters and enhancers used in animal cell expression vectors include SV40 early promoter and enhancer (Journal of Biochemistry, 101, 1307-1310, 1987), Morro-1 mouse leukemia quinores LTR promoter and enzyme. Junsaichi (Biochemical & Biophysical Research Com munications, 149, 960-968, 1987), Immunoglobulin heavy chain promoter (Cell, 41, 7 9-487, 1985) and Enhanser (Cell, 33, 717-728, 1983) ) Etc.
- SV40 early promoter and enhancer Journal of Biochemistry, 101, 1307-1310, 1987
- Morro-1 mouse leukemia quinores LTR promoter and enzyme Junsaichi (Biochemical & Biophysical Research Com munications, 149, 960-968, 1987), Immunoglobulin heavy chain promoter (Cell, 41, 7 9-487, 1985) and Enhanser (Cell, 33, 717-728, 1983) ) Etc.
- the human chimeric antibody and the humanized antibody expression vector are a type in which the antibody H chain and L chain are on separate vectors, or a type on the same vector (hereinafter referred to as a tandem type).
- the tandem humanized antibody expression vector is preferable in view of the equilibrium of the protein (Journal of Immunological Methods, 167, 271-2 78, 1994).
- O The tandem humanized antibody expression vector is pKANTEX93. (W097 / 1 0354), pEE18 (Hybridoma, 17, 559-567, 1998).
- Non-human animal antibodies for example, cDNAs encoding mouse antibody VH and VL can be obtained as follows.
- mRNA is extracted from Hypridoma and cDNA is synthesized.
- the synthesized cDNA is cloned into a vector such as a phage or plasmid to prepare a cDNA library.
- a vector such as a phage or plasmid
- a recombinant phage having a recombinant plasmid and cDNA encoding VL is isolated.
- any animal can be used as long as it can produce a mouse hybridoma, such as a mouse, rat, nomstar, or rabbit.
- kits for preparing mRNA from high-pridoma include Fast Track mRNA Isolation Kit (manufactured by Invitrogen) and wuick Prep mRNA Purincation Kit (manufactured by Pharmacia).
- a vector into which cDNA synthesized by using the RNA extracted from Hypridoma macaque as a saddle is incorporated is a vector that can incorporate the cDNA! / Can also be used.
- ZAP Express (Strategies, 5, 58-61, 1992), pBlue script II SK (+) (Nucleic Acids Research, 17,9494, 1989), ⁇ ⁇ II (Stratagene), ⁇ gtlO, ⁇ gtl l (DNA Cloning: A Practical Approach, I, 49, 1985), Lambda BlueM id (Clontech), ⁇ ExCell, pT7T3 18U (Pharmacia), pcD2 (Molecular & Cellular Biology, 3, 280-289, 1983) And phage or plasmid vectors such as pUC18 (Gene, 33, 103-119, 1985) are used.
- cDNA clones encoding VH and VL of non-human animal antibodies from cDNA libraries is based on colonies using radioisotopes or fluorescently labeled probes. Or the plaque's hybridization method (Molecular, A Laboratory Manual, old bpnng Harbor Lab. Press New York, 1989).
- a primer is prepared and a cDNA or cDNA library synthesized from mRNA is used as a saddle, Polymerase Chain Reaction (hereinafter referred to as PCR method; Molecular loning: A Laboratory Manual, Cold bpnng Harbor Lab. Press New York) 1989, Current Protocols in Molecular Biology, Supplement 1-34), and cDNAs encoding VH and VL can also be prepared.
- the cDNA selected by the above method is cleaved with an appropriate restriction enzyme or the like, and then cloned into a plasmid vector such as pBluescript SK (-) (Stratagene), and a commonly used nucleotide sequence analysis method such as dideoxy (Proceedings of the National Academy of Sciences of the United States of America, 74, 5463-5467, 1977), etc., and analysis using an automated base sequence analyzer ABI PRISM 377 (ABI) By doing so, the nucleotide sequence of the cDNA can be determined.
- a plasmid vector such as pBluescript SK (-) (Stratagene)
- a commonly used nucleotide sequence analysis method such as dideoxy (Proceedings of the National Academy of Sciences of the United States of America, 74, 5463-5467, 1977), etc.
- ABI PRISM 377 ABI PRISM 377
- the length of the signal sequence and the N-terminal amino acid sequence can be estimated, and the subgroup to which they belong can be known, and the amino acid sequences of CDRs of VH and VL are also known. It can be found by comparing with the amino acid sequences of VH and VL of an antibody (Sequences of Proteins of Immunological Interest, US Dept. Health and Human services, 1991).
- the BLAST method Journal of Molecular Biology, 21 5, 403-410, 1990
- SWISS-PROT and PIR-protein using the complete amino acid sequences of VH and VL.
- the novelty of the sequence can be examined by performing a homology search of such sequences.
- the cDNA encoding the VH and VL of the non-human animal antibody is cloned upstream of the gene encoding the human antibody CH and CL of the humanized antibody expression vector described in 2 (1) above.
- Type chimeric antibody expression vectors can be constructed.
- the cDNA encoding the VH and VL of a non-human animal antibody is obtained by using the nucleotide sequence of the VH and VL of the non-human animal antibody and the base of the CH5 and CL of the human antibody.
- Each of which is linked to a synthetic DNA having a recognition sequence for an appropriate restriction enzyme at both ends, and each of these is linked to the human antibody CH and the humanized antibody expression vector described in 2 (1) above.
- a human chimeric antibody expression vector can be constructed by cloning it so that it is expressed in an appropriate form upstream of the gene encoding CL.
- a plasmid containing cDNA encoding VH and VL of an antibody from a non-human animal is used as a template, and VH and VL are obtained by PCR using a primer having an appropriate restriction enzyme recognition sequence at the 5 'end.
- Antibody expression vectors can be constructed.
- CDNAs encoding the humanized antibody VH and VL can be constructed as follows. First, the VH and VL CDR amino acid sequences of the target non-human animal antibody VH and VL CDR amino acid sequences are selected. Any amino acid sequence derived from a human antibody can be used as the amino acid sequence of FR of human antibody VH and VL.
- VH and VL of human antibodies registered in databases such as Protein Data Bank, and common amino acids of subgroups of VH and VL of human antibodies ⁇ ti ⁇ U (Sequences of Proteins of Immunological Interest, US Dept.Health and Human Services, 1991) .
- VH and VH of non-human animal antibodies of interest It is desirable to select an amino acid sequence having as high a homology as possible (at least 60% or more) with the FR amino acid sequence of VL.
- the VH and VL CDR amino acid sequences of the target non-human animal antibody are transplanted to the VH and VL FR amino acid sequences of the selected human antibody, and the humanized antibody VH and VL amino acid sequences are transferred.
- the designed amino acid sequence is converted to a nucleotide sequence in consideration of the frequency of use of codons found in the nucleotide sequence of the antibody gene (Sequences of Proteins of Immunological Interest, US Dept. Health and Human Services, 1991).
- the nucleotide sequence encoding the amino acid sequence of VH and VL is designed. Based on the designed nucleotide sequence, several synthetic DNAs with a length of around 150 bases are synthesized, and PCR is performed using them. In this case, it is preferable to design four synthetic DNAs for both VH and VL from the reaction efficiency in PCR and the length of DNA that can be synthesized.
- the amplified product is cloned into a plasmid such as pBluescript SK (-) (Stratagene), the base sequence is determined by the method described in 2 (2) above, and the VH of the desired humanized antibody is determined. And a plasmid having a base sequence encoding the amino acid sequence of VL. To get.
- a plasmid such as pBluescript SK (-) (Stratagene)
- the base sequence is determined by the method described in 2 (2) above, and the VH of the desired humanized antibody is determined.
- a plasmid having a base sequence encoding the amino acid sequence of VL To get.
- Humanized antibodies can be obtained by transplanting only the VH and VL CDRs of the target non-human animal antibody into the VH and VL FRs of the human antibody, and their antigen-binding activity is comparable to that of the original non-human animal antibody. (BIO / TECHNOLOGY, 9, 266-271, 1991). This is because, in the VH and VL of the antibody of the original non-human animal, not only CDR but also some amino acid residues of FR are directly or indirectly related to antigen binding activity. It is considered that amino acid residues change to different amino acid residues of FR of VH and VL of human antibody with CDR grafting.
- humanized antibodies interact directly with the amino acid residues involved in antigen binding or CDR amino acid residues in the VH and VL FR amino acid sequences of human antibodies. Or the amino acid residues that are indirectly involved in antigen binding by maintaining the three-dimensional structure of the antibody, and changing them to amino acid residues found in the antibody of the original non-human animal. It has been attempted to increase the antigen binding activity (BIO / TECHNOLOGY, 9, 266-271, 1991). In the production of humanized antibodies, the most important point is how efficiently to identify the amino acid residues of FRs involved in these antigen-binding activities.
- Modification of the amino acid residues of VH and VL of human antibodies can be achieved by performing the PCR method described in 2 (4) above using synthetic DNA for modification. Determine the base sequence of the amplified product after PCR by the method described in 2 (2) above, and confirm that the target modification has been performed.
- humanized antibody expression vector The humanized antibody VH and VL constructed in 2 (4) and (5) above are upstream of the gene encoding the human antibody CH and CL of the humanized antibody expression vector described in 2 (1) above.
- the cDNA to be coded can be cloned and a humanized antibody expression vector can be constructed.
- an appropriate restriction enzyme recognition sequence is placed at the 5 'end of the synthetic DNA located at both ends. When introduced, it can be cloned so that it is expressed in an appropriate form upstream of the gene encoding the CH and CL of the human antibody of the vector for human antibody expression described in 2 (1) above. it can.
- the humanized antibody expression vectors described in 2 (3) and (6) above, or an expression vector modified from them are used.
- transient expression of a humanized antibody can be performed.
- the host cell into which the expression vector is introduced can be any host cell that can express human ⁇ antibody, but because of its high expression level, COS-7 cells (ATCC CRL1651) Commonly used (Methods in Nucleic Acids Research, CRC press, 283, 1991).
- Methods for introducing expression vectors into COS-7 Itoda cysts include the DEAE-dextran method (Methods in Nucleic Acids Research, CRC press, 283, 1991) and the lipofuxion method (Proceedings of the Ratio Academy of Sciences of the United States). of America, 84. 7413-7417, 1987).
- the expression level and antigen binding activity of the humanized antibody in the culture supernatant are determined by E LISA (Antibodies: ALaboratory Manual, Cold Spring Harbor Laboratory, Chapter 14, 1988; Monoclonal Antibodies: Principles and Practice, Academic Press Limited , 19 96).
- a transformed cell that stably expresses the humanized antibody By introducing the humanized antibody expression vector described in 2 (3) and (6) above into an appropriate host cell, a transformed cell that stably expresses the humanized antibody can be obtained.
- Examples of the method for introducing an expression vector into a host cell include the electopore position method (Cytotechnology, 3, 133-140, 1990).
- a host cell into which a humanized antibody expression vector is introduced Any host cell can be used so long as it is a host cell capable of expressing a human rabbit antibody.
- mouse SP2 / 0-Agl4 cells (ATCC CRL1581), mouse P3X63-Ag8.653 cells (ATCC CRL1580), dihydrofolate reductase gene (hereinafter referred to as) CHO Itoda cyst (Proceedings of the National Academy of Sciences of tne United States of America, 77, 4216-4220, 1980), rat YB2 / 3HL.P2.G11.16Ag.20 cells (ATCC CRL1662, hereinafter referred to as YB2 / 0 cells), etc. It is done.
- a transformant that stably expresses the humanized antibody is prepared by applying a drug such as G418 sulfate (hereinafter referred to as G418) according to the method disclosed in JP-A-2-257891. It can select by culturing with the animal cell culture medium containing.
- Animal cell culture media include RPMI1640 medium (manufactured by Nissui Pharmaceutical), GIT medium (manufactured by Nippon Pharmaceutical), EX-CELL302 medium (manufactured by JRH), IMDM (GIBCO BRL), Hybridoma-SFM (GIBCO BRL) or a medium obtained by adding various additives such as FBS to these mediums can be used.
- the humanized antibody By culturing the obtained transformed cells in a medium, the humanized antibody can be expressed and accumulated in the culture supernatant.
- the expression level and antigen binding activity of the humanized antibody in the culture supernatant can be measured by ELISA.
- the transformed cells can increase the expression level of the humanized antibody using a DHFR amplification system or the like according to the method disclosed in JP-A-2-257891.
- Humanized antibodies can be purified from the culture supernatant of transformed cells using a protein A column (Antibodies: A Laboratory Manual, Cola Spring Harbor Laooratory, hap ter 8, 1988; Monoclonal Antibodies: Principles and Practice, Academic Press Limited, 1996) o
- purification methods usually used in protein purification can be used. For example, it can be purified by combining gel filtration, ion exchange chromatography and ultrafiltration.
- the molecular weight of the purified humanized antibody H chain, L chain, or whole antibody molecule can be determined by polyacrylamide gel electrophoresis (hereinafter referred to as PAGE: Nature, 227, 680-685, 1970) or Western blotting (Antibodies: A Laboratory Manual, Cold Spring Harbor Laboratory, hapter 12, 1988; Monoclonal Antibodies: Principles and Practice, Academic Press Limited, 1996). (9) Evaluation of binding activity between humanized antibody and antigen
- the evaluation of the binding activity between the humanized antibody and the antigen can be performed using the ELISA described above.
- Antibody fragments can be prepared by genetic engineering techniques or tandem phylogenetic techniques based on the antibodies described in 1 and 2 above.
- Examples of genetic engineering methods include constructing a gene encoding the target antibody fragment, and expressing and purifying it using an appropriate host such as animal cells, plant cells, insect cells, and E. coli.
- proteologic methods include site-specific cleavage and purification using proteolytic enzymes such as pepsin and nopain.
- Fab can be produced proteolytically by treating IgG with the proteolytic enzyme papain. After papain treatment, if the original antibody is an IgG subclass with protein A binding properties, it can be separated from IgG molecules and Fc fragments by passing through a protein A column and recovered as a uniform Fab (Monoclonal Antibodies: Principles an d Practice, third edition, 1995). In the case of IgG subclass antibodies that do not have protein A binding properties, the ion exchange chromatography shows that Fab is in the fraction that elutes at a low salt concentration [Monoclonal Antioodies: Principles and Practice, (third editio n, 1995) oFabs can be produced by genetic engineering, mostly using E.
- DNA encoding the V region of the antibody described in 2 (2), 2 (4) and 2 (5) above can be cloned into a Fab expression vector to prepare a Fab expression vector.
- Any Fab expression vector can be used as long as it can incorporate and express Fab DNA.
- An example is pIT106 (Science, 240, 1041-1043, 1988).
- a Fab expression vector can be introduced into an appropriate coli, and Fab can be produced and accumulated in inclusion bodies or periplasm. Enclosed The body can be made into an active Fab by the refolding method usually used for proteins, and when expressed in the periplasm, the active Fab leaks into the culture supernatant. After refolding or from the culture supernatant, a homogeneous Fab can be purified by using a force ram that binds the antigen (Antibody Engineering, A Practical Guide, WH Freemanana Company, 1992).
- F (ab ') is proteinically processed by treating IgG with the proteolytic enzyme pepsin.
- Fab ′ is obtained by treating F (a) described in 3 (2) above with a reducing agent such as dithiothreitol.
- Fa can be produced by genetic engineering, mostly using E. coli, insect cells and animal cells.
- DNA encoding the V region of the antibody described in 2 (2), 2 (4) and 2 (5) above can be cloned into a Fa expression vector to prepare a Fa expression vector.
- Any Fa expression vector can be used as long as it can incorporate and express Fa DNA.
- pAK19 BIO / TECHNOLOGY, 10, 163-167, 1992.
- Fa expression vector can be introduced into appropriate E. coli and Fa can be produced and accumulated in inclusion bodies or periplasm. Inclusion bodies can be made into active Fa by the refolding method usually used for proteins.
- Uniform Fa When expressed in periplasm, partial digestion with lysozyme, osmotic shock, and lysis The bacteria can be crushed by treatment such as, and recovered outside the cells. Uniform Fa can be purified after refolding or from bacterial lysates by using a protein G column (Antibod y Engineering, A Practical Approach, IRL PRESS, 199b.
- scFv can be prepared by genetic engineering using phage or E. coli, insect cells, animal cells, and the like.
- a DNA encoding the V region of the antibody described in 2 (2), 2 (4) and 2 (5) above can be cloned into an scFv expression vector to prepare an scFv expression vector.
- the scFv expression vector any vector can be used as long as it can incorporate and express scFv DNA.
- pCANTAB5E manufactured by Pharmacia
- pHFA Human Antibodies & Hybridomas, 5, 48-56, 1994
- scFv By introducing the scFv expression vector into appropriate Escherichia coli and infecting the helper phage, a phage expressing scFv fused to the phage surface protein can be obtained on the phage surface.
- scFv can be generated and accumulated in inclusion bodies or periplasm of E. coli into which the scFv expression vector has been introduced. Inclusion bodies can be converted into active scFv by the refolding method usually used for proteins.
- periplasm partial digestion with lysozyme, osmotic shock, and soak Bacteria can be crushed by treatment with Chillon and collected outside the cells. Uniform scFv can be purified by cation exchange chromatography after refolding or from bacterial lysates (Ant3 ⁇ 4ody Engineering, A Practical Approach, IRL PRESS, 1996).
- diabodies can be prepared by using mostly Escherichia coli, insect cells and animal cells.
- a DNA in which the VH and VL of the antibody described in 2 (2), 2 (4) and 2 (5) above are linked so as to be equal to or less than the amino acid residue strength residue encoded by the linker is prepared,
- a diabody expression vector can be prepared by cloning into a diabody expression vector. Any diabody expression vector can be used as long as it can incorporate and express diabody DNA. Examples thereof include pCANTAB5E (manufactured by Pharmacia), pHFA (Human Antibodies Hybridomas, 5, 48, 1994) and the like. Diabodies can be generated and accumulated in inclusion bodies or periplasm of E.
- coli introduced with a diabody expression vector.
- the refolding method usually used for proteins Can be converted into active diabodies, and when expressed in the periplasm, crush the bacteria by treatment with partial digestion with lysozyme, osmotic shock, lysis, etc., and collect them outside the cells. Can do. Uniform diabodies can be purified after refolding or from bacterial crushing liquid by using cation exchange chromatography (Antibody Engineering, A Practical Approach, IRL PRESS, 1996).
- dsFv can be produced mostly using E. coli, insect cells and animal cells.
- mutations are introduced at appropriate positions in the DNA encoding the VH and VL of the antibody described in 2 (2), 2 (4) and 2 (5) above, and the encoded amino acid residue is changed to cysteine.
- Make the substituted DNA Each of the prepared DNAs can be cloned into a dsFv expression vector to prepare VH and VL expression vectors.
- Any dsFv expression vector may be used as long as it can incorporate and express dsFv DNA.
- pULI9 Protein Engineering, 7, 697-704, 1994.
- VH and VL expression vectors can be introduced into appropriate E.
- coli and dsFv can be produced and accumulated in inclusion bodies or periplasm.
- Inclusion bodies! /, Periplasma can also be obtained as active dsFv by obtaining and mixing VH and VL and then using the refolding method normally used for proteins. After refolding, it can be further purified by ion exchange chromatography and gel filtration (Protein Engine ering, 7, 697-704, 1994).
- a medicament containing the monoclonal antibody of the present invention as an active ingredient can treat various diseases involving HB-EGF.
- HB-EGF diseases involving HB-EGF include cancer, heart disease, arteriosclerosis and the like.
- cancers examples include solid cancers such as breast cancer, liver cancer, knee cancer, bladder cancer, ovarian cancer, and ovarian germ cell tumor. Also included are continuity, hematogenous or lymphatic metastasis associated with any solid cancer, metastatic cancer due to peritoneal dissemination and the like. In addition, cancer types such as leukemia (acute myeloid leukemia, T-cell leukemia, etc.), lymphoma, myeloma-derived cancer (blood cancer, hematological cancer, blood cancer), etc.
- a pharmaceutical comprising the antibody of the present invention or an antibody fragment thereof as an active ingredient is usually mixed together with one or more pharmacologically acceptable carriers, and any well known in the technical field of pharmaceutics. It is desirable to provide it as a pharmaceutical preparation produced by the method.
- intravenous administration is desirable.
- the dosage form include sprays, capsules, tablets, granules, syrups, emulsions, suppositories, injections, ointments, tapes and the like.
- Suitable formulations for oral administration include emulsions, syrups, capsules, tablets, powders, granules and the like.
- Liquid preparations such as emulsions and syrups include sugars such as water, sucrose, sorbitol, and fructose, Daricols such as polyethylene glycol and propylene glycol, oils such as sesame oil, olive oil and soybean oil, p- It can be produced using preservatives such as hydroxybenzoates, and flavors such as strawberry flavor and peppermint as additives.
- lactose include lactose, glucose, sucrose, mannitol and other excipients, starches, disintegrants such as sodium alginate, lubricants such as magnesium stearate and talc, It can be produced using a binder such as bull alcohol, hydroxypropyl cellulose, gelatin, a surfactant such as fatty acid ester, and a plasticizer such as glycerin as additives.
- a binder such as bull alcohol, hydroxypropyl cellulose, gelatin, a surfactant such as fatty acid ester, and a plasticizer such as glycerin as additives.
- Suitable formulations for parenteral administration include injections, suppositories, sprays and the like.
- An injection is prepared using a carrier comprising a salt solution, a glucose solution, or a mixture of both.
- Suppositories are prepared using a carrier such as cacao butter, hydrogenated fat or carboxylic acid.
- the spray is prepared using the antibody or peptide itself or a carrier that does not irritate the recipient's oral cavity and airway mucosa and that disperses the compound as fine particles to facilitate absorption.
- Specific examples of the carrier include lactose and glycerin.
- preparations such as aerosols and dry powders are possible.
- the dose or number of administrations depends on the intended therapeutic effect, administration method, treatment period, age, body weight.
- the force varies depending on the normal adult 10g / kg to 8mg / kg per day.
- Recombinant secreted human HB-EGF (Catalog No. 259-HE / CF) manufactured by R & D Systems was dried and dissolved in Dulbecco's phosphate buffer (PBS) and used as an immunogen.
- PBS Dulbecco's phosphate buffer
- Example 1 Recombinant-secreting human HB-EGF prepared in (1) (25 ⁇ g) was treated with aluminum hydroxide-Ammununant LAntibomes-A Laboratory ManuaL, CoLd bpnng Harbor Laboratories, p99, 1988] 2 mg and pertussis vaccine (Chiba serum) Laboratory Ltd.) 1 X 10 9 cells together with the HB-EGF deficient mice (research Institute for microbial diseases, Osaka University cell function field laboratory from donor, PNAS, VOL.100, NO.100, 3221-3226 , administered to 2003) did. From 2 weeks after administration, only 25 g of the HB-EGF was administered once a week for a total of 4 times.
- Partial blood was collected from the fundus vein of the mouse, and the serum antibody titer thereof was examined by the enzyme immunoassay shown below.
- the spleen was removed 3 days after the final immunization from the mouse showing a sufficient antibody titer.
- the spleen was shredded in a MEM (Minimum Essential Medium) medium (manufactured by Nissui Pharmaceutical), loosened with tweezers, and centrifuged (1200 rpm, 5 minutes).
- Tris-monochloride-ammonium buffer (PH7.6) was added to the resulting precipitate fraction and treated for 1 to 2 minutes to remove erythrocytes.
- the resulting precipitate fraction (cell fraction) was washed 3 times with MEM medium and used for cell fusion.
- Example 1 dispense the recombinant human HB-EGF of Example 1 (1) into a 96-well ELISA plate (Greiner) at 0.5 g / mL, 50 L / well, and leave it at 4 ° C. Adsorbed one was used. After washing the plate, 1% bovine serum albumin (BSA) -PBS was left at 50 L / well for 1 hour at room temperature to block remaining active groups. After standing, discard 1% BS A-PBS, and immunize mouse antiserum and Hypridoma as primary antibody on the plate. The culture supernatant was dispensed at 50 ⁇ L / well and allowed to stand for 2 hours.
- BSA bovine serum albumin
- Tween-PBS polyoxyethylene (20) sorbitan monolaurate
- Tween-PBS polyoxyethylene (20) sorbitan monolaurate
- ABTS 2.2-azinobis (3-ethylbenzothiazole-6-sulfonic acid) ammonium] substrate solution [1 mmoL / L ABT S / 0.1 moL / L citrate buffer (PH4.2), 0.1% HO]
- the absorbance at nm was measured using a plate reader (Emax; Molecular Devices).
- mice spleen cells obtained in Example 1 (2) and the myeloma cells obtained in Example 1 (4) were mixed at 10: 1 and centrifuged (1200 rpm, 5 minutes). After loosening the cells of the resulting precipitate fraction, mix a mixture of 1 g of polyethylene glycol-1000 (PEG-1000), 1 mL of MEM medium, and 0.35 mL of dimethylsulfoxide at 37 ° C with stirring. 0.5 mL was added per 8 mouse spleen cells, and 1 mL of MEM medium was added several times to the suspension every 1 to 2 minutes, and then the MEM medium was added so that the total volume became 50 mL.
- PEG-1000 polyethylene glycol-1000
- MEM medium dimethylsulfoxide
- the suspension was centrifuged (900 rpm, 5 minutes), and the cells of the obtained precipitate fraction were loosened gently. Then, the cells were gently sucked and sucked with a mespipette, and then gently added to HAT medium [10% fetus fetus. Medium supplemented with HAT Media Supplement (manufactured by Invitrogen) in RPMI1640 medium supplemented with serum] It was suspended in 100 mL. Dispense the suspension into a 96-well culture plate at 200 ⁇ L / well and add 5% CO incubator.
- Example 1 Incubated at 37 ° C for 10-14 days. After culturing, the culture supernatant is examined by the enzyme immunoassay described in Example 1 (3), a well that reacts with recombinant human HB-EGF is selected, and clotting by limiting dilution is selected from the cells contained therein. Repeatedly, anti-HB-EGF monoclonal antibody-producing hybridoma strains KM3566, KM3567 and KM3579 were established.
- the subclass of the monoclonal antibody was determined by ELISA using a sub-clustering kit.
- the subclass of the monoclonal antibody KM3566 was IgG1
- the subclass of KM3567 was IgG1
- the monoclonal antibody KM3579 was IgG2b.
- Primary antibodies include anti-HB-EGF monoclonal antibodies KM3566, KM3567, KM3579, commercial anti-HB-EGF monoclonal antibody MAB259 (R & D), and negative control antibody KM511 (anti-GCSF derivative monoclonal antibody).
- the antibody produced was diluted stepwise from 10 g / mL at a 5-fold dilution. The results are shown in Figure 1-1.
- Anti-HB-EGF monoclonal antibodies KM3566, KM3567, KM3579, and MAB259 all reacted with recombinant human HB-EGF, but did not react with BSA at all.
- the membrane was thoroughly washed with Tween-PBS, and diluted peroxidase-labeled mouse immunoglobulin (Zymet) was reacted at room temperature for 1 hour.
- the membrane was thoroughly washed with Tween-PBS, and the band was detected using ECL TM western blotting detection reagent s (manufactured by Amersham Fanolemacia).
- ECL TM western blotting detection reagent s manufactured by Amersham Fanolemacia.
- the anti-HB-EGF monoclonal antibodies KM3566, KM3567, KM3579, and MAB259 all have bands around 15-30 kilodaltons (hereinafter referred to as kDa) corresponding to the molecular weight of recombinant secreted human HB-EGF. Detected.
- Anti-HB-EGF monoclonal antibodies KM3566, KM3567, KM3579 and MAB259 were tested for B and J using 32DZEGFR cells and piotin-labeled HB-EGF.
- Recombinant secreted HB-EGF was labeled with vivid tin by a conventional method using EZ-Link Sulfo-NHS-Biotin (Pierce).
- KM3566, KM3567, KM3579 and MAB259 were diluted stepwise from 10 g / mL at a 5-fold dilution, and dispensed into 96-well plates at 50 L / well. Thereafter, 32DZEGFR cells were dispensed at 1 ⁇ 10 4 cells / 50 L / well. In addition, 10 ⁇ L / well and 50 ⁇ L / well were diluted with 10 ⁇ L / well, respectively, of Piotin-labeled HB-E GF and Alexa 647-labeled streptavidin diluted to the optimal concentration, and then allowed to react for 3 hours in the dark at room temperature. . The wavelength of 650 nm to 685 nm excited by the laser beam 633 nm He / Ne was measured by 8200 Cellular Detection System (manufactured by Applied System).
- KM3566, KM3567, KM3579, and MAB259 all inhibited the binding of Pyotin ⁇ ⁇ HB-EGF to EGFR in an antibody concentration-dependent manner. Therefore, it was revealed that all anti-HB-EGF monoclonal antibodies inhibit the binding of HB-EGF and EGFR.
- Anti-HB-EGF monoclonal antibodies KM3566, KM3567, KM3579 and MAB259 were examined for HB-EGF neutralizing activity by cell growth inhibition assay using HB-EGF-dependent cells.
- HB-EGF-dependent cell a cell line (hereinafter referred to as 32D / EGFR) constructed by introducing the EGFR gene into the mouse bone marrow-derived cell line 32D clone3 (ATC C CRL-11346) was used.
- Anti-H B-EGF monoclonal antibodies KM3566, KM3567, KM3579, MAB259, and negative control antibody KM511 purified antibodies are diluted stepwise at a dilution of 3 to 4 from 20 g / mL. Dispense into 96-well plates at 0 ⁇ L / well. Next, 0.1 ⁇ g / mL recombinant human ⁇ -EGF (R & D) was dispensed at 10 L / well, mixed, and reacted on ice for 2 hours. Thereafter, 32D / EGFR cells were seeded at 1 ⁇ 10 4 cells / 40 ⁇ L / well and cultured for 36 hours. A living cell count reagent SF (Nacalai Testa) was added at 10 L / well, and after 2 hours, the absorbance at OD450 nm was measured using a plate reader (Emax; Molecular Devices).
- Emax Molecular Devices
- KM3567 had an activity of inhibiting HB-EGF-dependent cell proliferation, although its activity was weaker than that of KM3566.
- Fig. 3 shows the mean fluorescence intensity (MFI value) in the case where the above monoclonal antibody was reacted at 20-fold dilution from 20 ⁇ g / mL to 28-28 and ES-2.
- Figure 4 shows the human breast cancer cell line MDA-M.
- B-231 shows a histogram when the above monoclonal antibody is reacted at 20 g / mL.
- the MFI value of MAB259 was similar to that of the negative control antibody KM511 and the non-antibody added negative control, and there was almost no binding to the cells. From the above, it became clear that the monoclonal antibodies KM3566, KM3567 and KM3579 bind to HB-EGF bound to the membrane type and cell membrane of cancer cell lines.
- PCR was performed using a mouse Ig ( ⁇ ) -specific primer having the nucleotide sequence represented by SEQ ID NO: 7 in place of the Ig (y) -specific primer to amplify the VL cDNA fragment.
- PCR was heated at 94 ° C for 5 minutes, followed by 5 reaction cycles consisting of 94 ° C for 30 seconds, 72 ° C for 3 minutes, 94 ° C for 30 seconds, 70 ° C for 30 seconds, 72 ° C 5 reaction cycles for 3 minutes at 30 ° C, 30 seconds at 94 ° C, 30 seconds at 68 ° C, 30 minutes at 72 ° C and 3 minutes at 72 ° C, then 10 minutes at 72 ° C
- PTC-200 DNA Engine manufactured by BioRad.
- a plasmid was extracted from the obtained transformant using an automatic plasmid extractor (manufactured by Kurabo Industries Co., Ltd.), and reacted according to the attached instructions using BigDye Terminator Cycle sequencing FS Ready Reaction Kit (manufactured by PE noisy Suams).
- the entire nucleotide sequence of VH is contained in SEQ ID NO: 8
- the entire amino acid sequence of VH including the signal sequence deduced from the sequence is contained in SEQ ID NO: 9
- the entire nucleotide sequence of the VL was shown in SEQ ID NO: 10
- the entire amino acid sequence of the VL including the signal sequence deduced from the sequence was shown in SEQ ID NO: 11, respectively.
- VH and VL CDRs of the anti-HB-EGF monoclonal antibody KM3566 were identified by comparing with the amino acid sequences of known antibodies.
- an anti-HB-EGF chimeric antibody expression vector PKANTEX3566 was constructed as follows. .
- Plasmid KM3566VH10G2 is used as a saddle and lOOng, and 10 X KOD buffer 10 ⁇ L, 2 mmol / L dNTP 10 ⁇ L, 25 mmol / L magnesium chloride in 2 ⁇ 10 ⁇ mol / L SEQ ID NO: 18 And a solution consisting of 100 L in total containing 1 ⁇ L of the primer having the base sequence of 19 and 1 ⁇ L of KOD polymeras e (manufactured by Toyobo Co., Ltd.) at 96 ° C.
- a gene sequence encoding VL of KM3566 to which a restriction enzyme recognition sequence for insertion into PKANTEX93 was added was synthesized.
- ethanol precipitation The plasmid pKM3566VH containing the gene sequence encoding VL of KM3566 and the plasmid PKM3566VL containing the gene sequence encoding VL are obtained by cloning into a pBluescriptll SK (-) vector that has been further purified, concentrated and digested with Smal. did.
- the two fragments obtained were ligated using Ligation high (Toyobo Co., Ltd.) according to the attached instructions, and the resulting recombinant plasmid DNA solution was used for Escherichia coli DH5 ⁇ strain (Toyobo Co., Ltd.).
- Each plasmid DNA was prepared from the clone of the transformant and confirmed by restriction enzyme treatment, and the plasmid ⁇ EX3566VL into which the target EcoRI-BsiWI fragment of about 0.43 kb was inserted was obtained.
- the restriction enzyme Apal (TaKaRa) was added to the pKANTEX3566VL and pKM3566VH obtained above and reacted at 37 ° C for 1 hour, and then the restriction enzyme NotI (New England Biolabs) was further added. The reaction was carried out at 37 ° C for 1 hour. The reaction solution was fractionated by agarose gel electrophoresis, and an Apal-Notl fragment of about 13.2 kb pKANTEX3566VL and about 0.47 kb VH was recovered.
- the two fragments obtained were ligated using Ligation High (Toyobo Co., Ltd.) according to the attached instructions, and Escherichia coli DH5a strain (Toyobo Co., Ltd.) was obtained using the resulting recombinant plasmid DNA solution. Transformed.
- Each plasmid DNA was prepared from the clone of the transformed strain and confirmed by restriction enzyme treatment to obtain the plasmid pKANTEX3566 into which the target Apal-Notl fragment of about 0.47 kb was inserted.
- the transformed strain ⁇ ⁇ 3966 obtained in (2) above is cultured by the usual culture method, and then the cell suspension is collected and centrifuged at 3000 rpm and 4 ° C for 10 minutes to obtain the culture supernatant. After being collected, it was sterilized by filtration through a 0.22 ⁇ m pore size Millex GV filter (manufactured by Millipore).
- the anti-HB-EGF chimeric antibody KM3966 was purified from the obtained culture supernatant using a Protein A High-capacity resin (Milipore) column according to the attached instructions. The purity of the purified anti-HB-EGF chimeric antibody KM3966 and the expressed molecular size were confirmed by SDS-PAGE using a gradient gel (ATTO, E-T520L) according to the attached instructions. It was.
- the results are shown in FIG.
- the purified anti-HB-EGF chimeric antibody KM3966 showed one band around 150-200 kDa in molecular weight under non-reducing conditions, and two bands of about 50 kDa and about 25 kDa under reducing conditions. . These molecular weights are about 150 kDa under non-reducing conditions of IgG class antibody power.
- the SS bond in the molecule is cleaved, and the H chain with a molecular weight of about 50 kDa and the molecular weight of about 25 kDa It is consistent with the report that it is broken down into L chains [Antibodies—A Laboratory Manuau and old Spring Harbor Laboratory ⁇ Chapter (4 (1988), Monoclonal Antibodies-Principles and Practice ⁇ Academic Press Limited (1996)]. Therefore, it was confirmed that the anti-HB-EGF chimeric antibody KM3966 was expressed as an antibody molecule with the correct structure.
- Example 6 In order to evaluate the binding of the anti-HB-EGF chimeric antibody KM3966 obtained in Example 6 to a human solid cancer cell line, the fluorescent antibody method was examined as follows.
- Human ovarian cancer cell lines MCAS (JCRB0240), RMG-1 (JCRB IF050315), ES-2 (CRL197 8), MDA-MB-231 (ATCC HTB-26), T47D (HTB-133), SK-BR-3 (ATCC HTB-30), ZR-75-1 (ATCC CRL-1500) of human breast cancer cell lines MKN-28 (HSRR B JCRB0253), a human gastric cancer cell line, was peeled off with 0.02% -EDTA Solution (Nacalai Testa), washed with PBS, and placed on a 96-well U-bottom plate (FALCON). , it was dispensed at 1 ⁇ 2 X 10 5 cells / 50 ⁇ L / ⁇ El minute.
- An anti-HB-EGF chimeric antibody ⁇ 3966 solution prepared to 1 g / mL with 1% BSA-PBS was dispensed in 50 LZ wells, stirred with a plate mixer, and allowed to stand on ice for 30 minutes. After washing twice with PBS, the secondary antibody FITC-conjugated AffiniPure F) diluted 100-fold) 2 Fragment Rabbit Anti-Human IgG, H + L) Qacson Laboratories) The mixture was stirred and allowed to stand on ice for 30 minutes. After washing twice with PBS, the fluorescence intensity was measured using a flow cytometer EPICS XL System II v3.0 (manufactured by BECKMAN C OULTER). An anti-FGF8 chimeric antibody KM3034 (US2004-0253234) was used as a negative control antibody.
- Biacore Biacore T-100
- Human HB-EGF (R & D) prepared to 5 ⁇ g / mL using HBS-EP Buffer (Biacore) was added to a CM5 sensor chip (Biacore) 80RU (resonance unit) by the ammine coupling method. ) To form a solid layer.
- the cell line was detached with 0.02% -EDTA Solution (manufactured by Nacalai Tester), washed with PBS, RPMI 1640 medium (GIBCO-BRL) was prepared, and centrifuged at 300 G for 5 minutes to remove the supernatant.
- Recombinant human HB-EGF (manufactured by R & D) diluted with 0.1% BSA-PBS was added to the cells at 1 ⁇ g / mL and reacted at 37 ° C for 10 minutes. When recombinant human HB-EGF was not added, 0.1% BSA-PBS alone was added and reacted at 37 ° C for 10 minutes in the same manner.
- Rabbit Anti-Human Igu H + L (Jackson Laboratories: ⁇ ) was added in 50 ⁇ LZ wells, stirred with a plate mixer, protected from light, and allowed to stand on ice for 30 minutes. After washing, the fluorescence intensity was measured with a flow cytometer EPICS XL System II v3.0 (manufactured by BECKMAN COULTER) An anti-FGF8 chimeric antibody (US2004-02 53234) was used as a negative control antibody.
- the anti-HB-EGF chimeric antibody KM3966 of the present invention binds to both membrane type and HB-EGF bound to the cell membrane.
- HB-EGF-dependent growth inhibitory activity was measured.
- HB-EGF dependent cells HB-EGF positive human ovarian cancer cell line RMG-KJCRB IF050315
- human gastric cancer cell line MKN-28 HSRRB JCRB
- RMG-I is 2.5 X 10 3 cells Z50 mu LZ Ueru
- MKN-28 were seeded into 96 ⁇ El plates at 1 X 10 4 cells / 50 mu LZ Ueru.
- Recombinant human HB-EGF (R & D) diluted with 0.1% BSA-PBS, with a concentration of 3 ng / mL for RMG-I and 50 ng / mL for MKN-28 Add 50 mL of LZ well with the concentration of mL, dilute anti-HB-EGF chimeric antibody KM3966 10 times from 30 ⁇ g / mL in 4 steps, add 50 ⁇ L / well and mix did.
- Human IgG (manufactured by Mitsubishi Wellpharma) was used as a negative control antibody. After culturing at 37 ° C for 72 hours, add 15 ⁇ LZ well of live cell counting reagent WST-1 (manufactured by Nacalai Testa), and after 2 hours, measure the absorbance at OD450 nm using a plate reader (E max; MoLecular Devices The measurement was performed using
- ADCC activity Antibody-dependent cytotoxic activity
- the ADCC activity of the anti-HB-EGF chimeric antibody KM3966 obtained in Example 6 was measured according to the method shown below.
- Various cell lines were detached with 0.02% -EDTA Solut ion (Nacalai Testa) and RP MI1640 medium (Invitrogen) without phenol red containing 1% FCS JRH (hereinafter referred to as ADCC medium) After washing with, the target cell solution was prepared by adjusting to the optimal concentration in the same medium.
- Peripheral blood mononuclear cells were isolated from normal human peripheral blood by the method described below. 50 mL of healthy human peripheral blood was collected with a syringe containing a small amount of sodium sodium injection N “Shimizu” (manufactured by Shimizu Pharmaceutical). The collected peripheral blood was diluted with the same amount of physiological saline (manufacturer) and stirred well.
- the target cell total release value was obtained by adding target cell solution L and medium 80 L, and adding 9% Triton X-100 solution L 45 minutes before the end of the reaction. After the reaction, the plate was centrifuged, and the lactate dehydrogenase (LDH) activity in the supernatant was detected by measuring the absorbance according to the attached instruction using LDH-Cytotoxic Test (manufactured by Wako). ADCC activity was determined by the following formula.
- ADCC activity (%) ([Absorbance of specimen] [Absorbance of spontaneous release of target cells and effector cells]) Z ([Absorbance of total release of target cells] [Absorbance of spontaneous release of target cells]) X 10 0
- the results are shown in FIG.
- the anti-HB-EGF chimeric antibody KM3966 exhibited cytotoxic activity against the HB-EGF-positive human solid cancer cell line in an antibody concentration-dependent manner.
- evaluation was performed using human ovarian cancer, mouse xenograft early cancer of human breast cancer and advanced cancer model.
- Tumor volume (mm 3 ) major axis X minor axis 2 X 0.5
- Anti-HB-EGF chimeric antibody KM3966 significantly inhibited tumor growth of ovarian cancer cell lines MCAS and ES-2. Therefore, it was revealed that the anti-HB-EGF chimeric antibody KM3966 has an antitumor effect in an early stage cancer model. .
- mice Human ovarian cancer cell lines MCAS and ES-2 and human breast cancer cell line MDA-MB-231 were removed with 0.02% -ED TA Solution (Nacalai Testa), washed with PBS, and then RPMI1640 medium (GIBCO-B RL) And centrifuged at 300 G for 5 minutes to remove the supernatant. After adding the same medium and washing by centrifugation, the cell suspension prepared to the optimum concentration was transplanted subcutaneously at 100 L to the right armpit of SCID mouse female 6-8 weeks old (Clea Japan). Observing the course, mice were selected when the tumor volume reached around 100 mm 3 and divided into groups so that the average tumor volumes of each group were equal.
- the antibody administration group received an antibody solution diluted with PBS, and the control group received 100 L of PBS alone in the tail vein (6-7 mice per group). Administration was carried out twice a week for a total of 8 times, and the tumor diameter was measured with calipers at the time of antibody administration. Tumor volume was calculated by the following formula.
- Tumor volume (mm 3 ) major axis X minor axis 2 X 0.5
- anti-HB-EGF chimeric antibody KM3966 significantly inhibited tumor growth of ovarian cancer cell lines MCAS, ES-2 and breast cancer cell line MDA-MB-231. Therefore, it was revealed that the anti-HB-EGF chimeric antibody KM3966 has antitumor activity in an advanced cancer model.
- ADCC activity Reactivity and antibody-dependent cytotoxic activity of anti-HB-EGF antibodies against human hematological cancer cell lines Evaluation (ADCC activity)
- a 50 ⁇ LZ well (about 2 ⁇ 10 5 cells) was dispensed onto a U-bottom plate (FALCON).
- Anti-HB-EGF mouse antibody 3566 solution prepared with 1% BS A-PBS to 20 ⁇ g / mL was dispensed with 50 ⁇ L Zwell, stirred with a plate mixer, and left on ice for 30 minutes. After washing twice with PBS, 50 L of secondary antibody Anti-mouse Igs / FITC Goat F (ab ') (DAKO) diluted 50-fold
- the mixture was added by fuel, stirred with a plate mixer and kept on ice for 30 minutes with light shielding. After washing twice with S, the fluorescence intensity was measured using a flow cytometer EPICS XL System II v3.0 (manufactured by BECKMAN COULTE R). Mouse IgGl (manufactured by DAKO) was used as a negative control antibody.
- the ADCC activity of the HB-EGF chimeric antibody KM3966 against the acute myeloid leukemia cell line in which HB-EGF expression was confirmed was measured according to the following method.
- Human acute myeloid leukemia cell lines ML-1, MOLM-13, MV-4-ll, HL-60, NB-4 and KG-la were washed with PBS, washed with ADCC medium, then the same medium To prepare an optimal cell solution.
- Peripheral blood mononuclear celhPBMC is derived from peripheral blood of healthy individuals. Separated by the method shown below. 50 mL of healthy human peripheral blood was collected with a syringe containing a small amount of sodium sodium injection N “Shimizu” (manufactured by Shimizu Pharmaceutical). The collected peripheral blood was diluted by adding the same amount of physiological saline (manufactured by Otsuka Pharmaceutical) and stirred well. On a polymorphprep (manufactured by NYCOMED) dispensed approximately 6.5 mL each into a 15 mL tube (Greiner), the same volume of diluted terminal blood is gently layered and centrifuged at room temperature for 800 G for 30 minutes to mononuclear. The sphere layer was separated. After washing twice with ADCC medium, it was adjusted to the optimum concentration with the same medium and used as an effector cell solution.
- the target cell total release value was obtained by adding 50 L of target cell solution and 80 L of medium, and adding 20 L of 9% Triton X-100 solution 45 minutes before the end of the reaction. After the reaction, the plate was centrifuged, and the lactate dehydrogenase (LDH) activity in the supernatant was detected by measuring the absorbance using LDH-Cytotoxic Test (manufactured by Wako) according to the attached instructions. ADCC activity was determined by the following formula.
- ADCC activity (%) ([Absorbance of specimen] [Absorbance of spontaneous release of target cells and effector cells]) Z ([Absorbance of total release of target cells] [Absorbance of spontaneous release of target cells]) X 10 0
- the results are shown in FIG.
- the anti-HB-EGF chimeric antibody KM3966 exhibited cytotoxic activity against the HB-EGF-positive human blood cancer cell line in an antibody concentration-dependent manner. Therefore, the anti-EB-EGF monoclonal antibody and the recombinant antibody HB-EGF of the present invention are expressed, and not only solid cancer such as ovarian cancer but also blood cancer such as acute myeloid leukemia and T cell leukemia It was suggested that it may be effective for Example 9
- VH amino acid sequence of the anti-HB-EGF humanized antibody was designed as follows.
- Rikibata et al. Classified VH of various known human antibodies into three subgroups (HSG ⁇ to ⁇ ) based on the homology of their amino acid sequences, and reported common sequences for each subgroup. [SEQUENCES of Proteins of Immunological Interest, US Dept. Health and Human Services (1991)]. Since these consensus sequences may be less immunogenic in humans, the amino acid sequence of the VH of the anti-HB-EGF humanized antibody was designed based on these consensus sequences.
- the anti-HB-EGF mouse was selected from the FR amino acid sequences of the consensus sequence of the three subgroups of human antibody VH.
- the amino acid sequence of FR having the highest homology with the FR amino acid sequence of VH of antibody KM3566 was selected.
- the VH CDR amino acid sequence of the anti-HB-EGF mouse antibody KM3566 was transplanted to the appropriate position of the FR amino acid sequence of the consensus sequence of VH subgroup I of the human antibody.
- the 74th Lys in the amino acid sequence of VH of KM3566 set forth in SEQ ID NO: 9 is most frequently used at the site corresponding to the amino acid sequence of the human antibody FR mentioned by Kinomoto et al. Since amino acid residues that are not amino acid residues are amino acid residues that are used relatively frequently, amino acid residues that are found in the amino acid sequence of KM3566 described above were used.
- the amino acid sequence HV0 of VH of the anti-HB-EGF human rabbit antibody represented by SEQ ID NO: 22 was designed.
- amino acid sequence of VL of the anti-HB-EGF human antibody was designed as follows.
- the highest amino acid sequence of FR of VL of anti-HB-EGF mouse antibody KM3566 is the highest.
- the amino acid sequence of FR with homology was selected.
- the homology of HSGI, HSGII, HSGIII and HSGIV was 75.0%, 75.0%, 71.3% and 81.3%, respectively. Therefore, the amino acid sequence of FR of VL of KM3566 had the highest homology with subgroup IV.
- the VL CDR amino acid sequence of the anti-HB-EGF mouse antibody KM3566 was transplanted to the appropriate position of the FR amino acid sequence of the consensus sequence of subgroup IV of the human antibody VL.
- the 110th Leu in the amino acid sequence of VL of KM3566 shown in SEQ ID NO: 11 is the most frequently used amino acid at the site corresponding to the amino acid sequence of the human antibody FR mentioned by Rikibat et al. Since amino acids that are not residues are amino acid residues that are used relatively frequently, amino acid residues that are found in the amino acid sequence of KM3566 described above were used.
- the amino acid sequence LV0 of the VL of the anti-HB-EGF human rabbit antibody represented by SEQ ID NO: 23 was designed.
- VH amino acid sequence HV0 and VL amino acid sequence LV0 of the above-designed anti-HB-EGF human rabbit antibody is the FR amino acid sequence of the selected human antibody and the CDR amino acid sequence of anti-HB-EGF mouse antibody KM3566 It is the arrangement which transplanted only.
- the binding activity is often lowered only by transplanting the amino acid sequence of the CDR of the mouse antibody to the FR of the human antibody.
- amino acid residues that are thought to affect binding activity are transferred to the CDR amino acid sequence.
- changes are being made. Therefore, also in this example, FR amino acid residues that are thought to affect the binding activity were identified as follows.
- the amino acid sequences HV0 and VL of the VH of the anti-HB-EGF human rabbit antibody designed above The three-dimensional structure of the antibody V region (HV0LV0) consisting of the amino acid sequence LVO was constructed using a computer modeling technique. For 3D structure coordinate creation, use the software AbM (Ox ford Molecular), and for 3D structure display, use the software Pro- Explore (Oxford Molecular) or ViewerLite (Accelrys). Followinged the instructions for use.
- a computer model of the three-dimensional structure of the V region of the anti-HB-EGF mouse monoclonal antibody KM3566 was also constructed in the same manner.
- the amino acid residue that is different from anti-HB-EGF mouse antibody KM3566 is selected and changed to the amino acid residue of anti-HB-EGF mouse antibody KM3566
- the amino acid sequence was prepared, and a three-dimensional structural model was constructed in the same manner. By comparing the three-dimensional structures of the V regions of these anti-HB-E GF mouse antibodies KM3566 and HV0LV0 and variants, amino acid residues that are predicted to affect the binding activity of the antibodies were identified.
- At least one amino acid sequence is modified to the amino acid residue present at the same site of mouse antibody KM3566, and VH and VL of humanized antibodies with various modifications are designed.
- the 9th Ala of the amino acid sequence represented by SEQ ID NO: 22 is Thr
- the 20th Val is Leu
- the 30th Thr is Arg
- the 38th Arg is Lys.
- the 70th lie to Leu
- the 95th Tyr to Phe
- at least one of the amino acid modifications replacing Le at the 118th Val was introduced.
- VL the 15th Leu of the amino acid sequence represented by SEQ ID NO: 23 is Val
- the 19th Ala is Val
- the 21st lie is Met
- the 49th Pro is Ser
- At least one of the amino acid modifications replacing the second Leu with Val was introduced.
- the designed amino acid sequence was linked to the H chain secretory signal sequence of anti-HB-EGF mouse antibody KM3566 represented by the 1st to 19th positions of SEQ ID NO: 9 to obtain a complete antibody amino acid sequence.
- the amino acid sequence was converted into a gene codon. If there are multiple gene codons for a single amino acid residue, the frequency of use found in the base sequence of the antibody gene [S EwUEN and £ S of Proteins of Immunological Interest, US Dept. Health and Human Services S (1991)], the corresponding gene codon was determined.
- the nucleotide sequence of the cDNA encoding the amino acid sequence of the complete antibody V region is designed, and the 5 'and 3' ends are combined with the primer sequence for amplification primers during PCR reaction ( (Including a restriction enzyme recognition sequence for cloning into the human potato antibody expression vector). Divide the designed base sequence into 4 base sequences in total of about 100 bases from the 5 'end side (adjacent base sequences should have an overlapping sequence of about 20 bases at their ends) A synthetic DNA (SEQ ID NO: 24-27) was synthesized in the order of alternating antisense strands.
- the reaction solution was precipitated with ethanol, dissolved in sterilized water, treated with an appropriate restriction enzyme, and then ligated to plasmid pBluescript II SK (-) (Stratagene).
- the recombinant plasmid DNA solution thus obtained is used to transform Escherichia coli DH5 ⁇ strain, and plasmid DNA is prepared from the transformed strain. BigDye Terminator Cycle Sequencing FS Ready Reaction Kit (manufactured by Applied Biosystems) As a result of analyzing the base sequence using, a plasmid having the target base sequence was obtained.
- the modification of the FR amino acid residue designed in this Example (1) was carried out by preparing a synthetic DNA having a mutation, performing the above PCR, and the cDNA encoding HV0 prepared above.
- PCR is carried out using synthetic DNA with mutations in plasmid DNA containing DNA as primers and amplified This was done by isolating the gene fragment.
- the modified gene codon of the amino acid residue was made to be the gene codon found in the anti-HB-EGF mouse antibody KM3566.
- cycles of 94 ° C for 30 seconds, 55 ° C for 30 seconds, and 72 ° C for 60 seconds were allowed to react in a PCR reaction of 35 cycles.
- PCR reaction was performed using KOD-plus polymerase (manufactured by TO YOBO).
- the synthetic DNA used is from Fasmac.
- a cDNA encoding the amino acid sequence of the VL of the anti-HB-EGF human rabbit antibody designed in this Example (1) was constructed using PCR as follows.
- the designed amino acid sequence was linked to the L chain secretory signal sequence of anti-HB-EGF mouse antibody KM3566 represented by positions 1 to 20 of SEQ ID NO: 11 to obtain a complete antibody amino acid sequence.
- the amino acid sequence was converted into a gene codon.
- the frequency of use found in the base sequence of the antibody gene [SEQUEN S of Proteins of Immunological Interest ⁇ US Dept. Health and Human ber vices (1991) ]. The corresponding gene codon was determined.
- the nucleotide sequence of the cDNA encoding the amino acid sequence of the complete antibody V region is designed, and then the 5 'and 3' ends are combined with the primer sequences for amplification primers in the PCR reaction (humanized)
- a restriction enzyme recognition sequence for cloning into an antibody expression vector was added. Divide the designed base sequence into 4 base sequences of about 100 bases each from the 5 'end (adjacent base sequences should have an overlapping sequence of about 20 bases at the end) and sense them
- Synthetic DNA SEQ ID NOs: 28 to 31 was synthesized in the order of alternating strands and antisense strands.
- Plasmid DNA was prepared, and the base sequence was analyzed using BigDye Terminator Cycle Sequencing FS Ready Reaction Kit (Applied Biosystems). As a result, plasmid pBS / LVO having the target base sequence was obtained.
- the modification of the FR amino acid residue designed in this Example (1) was performed by preparing a synthetic DNA having a mutation, carrying out the PCR described above, and the cDNA encoding the LV0 prepared above. PCR was carried out using a synthetic DNA having a mutation as a plasmid DNA containing a synthetic DNA having a mutation as a primer, and the amplified gene fragment was isolated. The gene codons of the amino acid residues after the modification were made to be the gene codons found in the anti-HB-EGF mouse antibody KM3566.
- PCR reaction is performed at 94 ° C for 30 seconds, 55 ° C for 30 seconds, 72 ° C for 60 seconds in 35 cycles with KOD-plus polymerase (TOYOBO) Was done using.
- the synthetic DNA used was manufactured by Fasmac.
- the respective cDNAs encoding HV0 and LV0 obtained in Examples (2) and (3), or their variants, are placed at appropriate positions in the humanized antibody expression vector pKANTEX93 described in WO97 / 10354.
- Various anti-HB-EGF humanized antibody expression vectors were constructed by inserting the encoding cDNA.
- Anti-HB-EGF antibodies KM3566, KM3579, and KM3966 all react with human HB-EGF and do not show cross-reactivity with mouse HB-EGF. Therefore, in the amino acid sequence of the EGF-like domain of human HB-EGF, 10 mutant human HB-EGF full-length proteins in which 10 amino acids different from mouse HB-EGF are replaced with amino acids derived from mouse, one by one. (Hereafter, mutation It is written as HB-EGF. ), And the binding activity of the anti-HB-EGF antibody was measured. The 10 types of mutant HB-EGF prepared are shown below.
- V124L Mutant HB-EGF with leucine replaced at the 124th position from the N-terminus
- H135L Mutation HB-EGF with the substitution of histidine at position 135 from the N-terminus
- the above-mentioned mutant HB-EGF and human Z mouse chimeric HB-EGF plasmid for transient expression can be obtained by the method of Mekada et al. (J. Bio. Chem., Vol. 272, 27084-27090, 1997). Made using.
- Mouse LMTK—cells (ATCC CCL-1.3) were cultured in Dulbecco's modified Eagle's medium supplemented with 100 unit / mL penicillin G, 100 ⁇ g / mL st reptomycin, and 10% Ushidaidai serum did.
- Each of the above expression plasmids was introduced into mouse LMTK-cells by the calcium phosphate method and then cultured for 48 hours and used in the subsequent experiments.
- mock cells in which only the vector was introduced into mouse LMTK-cells (hereinafter referred to as mock) were used.
- anti-HB-EGF rabbit antibody polyclonal antibody that binds equally to all mutant HB-EGFs (antibody name; H-6, synthetic peptides from the 54th to 73rd positions from the N-terminus of human HB-EGF)
- HB- EGF transgenic cell, human Z mouse chimeric HB- Absorbance against EGF gene-introduced cells and mock was measured by the same method as described above.
- Piotin-labeled H-6 antibody was used at an antibody concentration of 10 ⁇ g / mL.
- the value obtained by subtracting the absorbance for mock from the absorbance for each mutant HB-EGF gene-introduced cell and human Z mouse chimeric HB-EG F gene-introduced cell of H-6 antibody was defined as B value.
- the A / B value was determined by dividing the A value by the B value.
- the ratio of the A / B value to various mutant HB-EGF was calculated, and this was relative to the various mutant HB-EGF. Binding activity.
- Anti-HB-EGF monoclonal antibody KM3566 did not bind to I133K, H135L and S147T as compared to pRTHGC-6. Therefore, it was revealed that the anti-HB-EGF monoclonal antibody ⁇ 3566 recognizes an epitope containing the 133rd I, 135th ⁇ and 147th S amino acids. Similarly to anti-HB-EGF monoclonal antibody ⁇ 3566, anti-HB-EGF chimeric antibody ⁇ 3966, which has the same antibody variable region, hardly binds to I133K and H135L compared to pRTHGC-6. In S147T, binding activity decreased to about 1/3.
- the anti-HB-EGF chimeric antibody KM3966 like the anti-HB-EGF monoclonal antibody KM3566, recognizes an epitope containing the 133rd I, 135th H and 147th S amino acids. Became.
- anti-HB-EGF monoclonal antibody KM3579 Compared to pRTHGC-6, anti-HB-EGF monoclonal antibody KM3579 did not bind to E141H alone, and all other mutant HB-EGFs showed binding activity equivalent to pRTHGC-6. Therefore, it was revealed that the anti-HB-EGF monoclonal antibody KM3579 recognizes an epitope containing the 141st E amino acid.
- anti-HB-EGF monoclonal antibody KM3566 and anti-HB-EGF chimeric antibody KM3966 and anti-HB-EGF monoclonal antibody KM3579 It became clear that the group was recognized.
- the present invention provides monoclonal antibodies and antibody fragments thereof that bind to HB-EGF, membrane-type HB-EGF, and secretory HB-EGF that are bound to cell membranes.
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Priority Applications (8)
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CA002654572A CA2654572A1 (en) | 2006-06-06 | 2007-06-06 | Monoclonal antibody capable of binding to heparin-binding epidermal growth factor-like growth factor |
EP07744826A EP2039704A4 (en) | 2006-06-06 | 2007-06-06 | MONOCLONAL ANTIBODY CAPABLE OF BINDING TO EPIDERMAL GROWTH FACTOR GROWTH FACTOR BINDING TO HEPARIN |
JP2008520610A JP5586146B2 (ja) | 2006-06-06 | 2007-06-06 | ヘパリン結合上皮細胞増殖因子様増殖因子に結合するモノクローナル抗体 |
AU2007257646A AU2007257646B2 (en) | 2006-06-06 | 2007-06-06 | Monoclonal antibody capable of binding to heparin-binding epidermal growth factor-like growth factor |
CN200780028943.3A CN101511870B (zh) | 2006-06-06 | 2007-06-06 | 能够与肝素结合性表皮生长因子样生长因子结合的单克隆抗体 |
US12/329,946 US7851601B2 (en) | 2006-06-06 | 2008-12-08 | Monoclonal antibody capable of binding to heparin-binding epidermal growth factor-like growth factor |
US12/494,472 US8173781B2 (en) | 2006-06-06 | 2009-06-30 | Monoclonal antibody capable of binding to heparin-binding epidermal growth factor-like growth factor |
US13/365,769 US8481039B2 (en) | 2006-06-06 | 2012-02-03 | Monoclonal antibody capable of binding to heparin-binding epidermal growth factor-like growth factor |
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US (3) | US7851601B2 (ja) |
EP (1) | EP2039704A4 (ja) |
JP (1) | JP5586146B2 (ja) |
KR (1) | KR20090029227A (ja) |
CN (1) | CN101511870B (ja) |
AU (1) | AU2007257646B2 (ja) |
CA (1) | CA2654572A1 (ja) |
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WO2009040134A1 (en) * | 2007-09-26 | 2009-04-02 | U3 Pharma Gmbh | Heparin-binding epidermal growth factor-like growth factor antigen binding proteins |
WO2009072628A1 (ja) * | 2007-12-05 | 2009-06-11 | Kyowa Hakko Kirin Co., Ltd. | ヘパリン結合上皮細胞増殖因子様増殖因子に結合するモノクローナル抗体 |
WO2011021381A1 (ja) * | 2009-08-17 | 2011-02-24 | 株式会社未来創薬研究所 | 抗hb-egf抗体を有効成分として含む医薬組成物 |
WO2011108502A1 (ja) | 2010-03-02 | 2011-09-09 | 協和発酵キリン株式会社 | 改変抗体組成物 |
JP5378795B2 (ja) * | 2006-10-20 | 2013-12-25 | 中外製薬株式会社 | 抗hb−egf抗体を有効成分として含む医薬組成物 |
JP5676849B2 (ja) * | 2006-10-20 | 2015-02-25 | 中外製薬株式会社 | 抗hb−egf抗体を有効成分として含む癌治療剤 |
US8975374B2 (en) | 2006-10-20 | 2015-03-10 | Chugai Seiyaku Kabushiki Kaisha | Pharmaceutical composition comprising anti-HB-EGF antibody as active ingredient |
JP2015509492A (ja) * | 2012-02-22 | 2015-03-30 | ユー3・ファーマ・ゲーエムベーハー | Hb−egf結合タンパク質およびegfr阻害剤の組合せ |
WO2018005904A3 (en) * | 2016-07-01 | 2018-03-01 | Ludwig Institute For Cancer Research Ltd | Methods and compositions for pdgf-cc inhibition |
US11352436B2 (en) * | 2017-02-10 | 2022-06-07 | Washington University | Antibodies to TIP1 and methods of use thereof |
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AU2007257646B2 (en) | 2006-06-06 | 2011-08-11 | Kyowa Hakko Kirin Co., Ltd. | Monoclonal antibody capable of binding to heparin-binding epidermal growth factor-like growth factor |
GB0807018D0 (en) * | 2008-04-17 | 2008-05-21 | Fusion Antibodies Ltd | Antibodies and treatment |
EP2561356B1 (en) * | 2010-04-18 | 2016-08-03 | Yeda Research and Development Co. Ltd. | MOLECULES AND METHODS OF USING SAME FOR TREATING ErbB/ErbB LIGANDS ASSOCIATED DISEASES |
CN101988049B (zh) * | 2010-11-08 | 2012-07-25 | 扬州大学 | 共表达小鼠膜型白细胞介素15和Rae-1ε的转基因细胞及其制备方法 |
FR2988393B1 (fr) | 2012-03-20 | 2014-05-09 | Commissariat Energie Atomique | Inhibiteur de l'hb-egf derive du domaine r de la toxine diphterique pour le traitement des maladies associees a l'activation de la voie hb-egf/egfr |
CN106397590B (zh) * | 2016-09-08 | 2022-08-05 | 上海触研医学技术有限公司 | 一种肝素结合表皮生长因子的单域抗体及其应用 |
CN109580959B (zh) * | 2018-12-17 | 2020-03-31 | 江苏莱森生物科技研究院有限公司 | 一种检测肝素结合性表皮生长因子的elisa试剂盒 |
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US8173781B2 (en) | 2012-05-08 |
US20120177649A1 (en) | 2012-07-12 |
EP2039704A1 (en) | 2009-03-25 |
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US8481039B2 (en) | 2013-07-09 |
EP2039704A4 (en) | 2010-04-21 |
AU2007257646B2 (en) | 2011-08-11 |
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KR20090029227A (ko) | 2009-03-20 |
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