WO2005028515A1 - ヒトインスリン様成長因子に対する遺伝子組換え抗体 - Google Patents
ヒトインスリン様成長因子に対する遺伝子組換え抗体 Download PDFInfo
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- WO2005028515A1 WO2005028515A1 PCT/JP2004/014453 JP2004014453W WO2005028515A1 WO 2005028515 A1 WO2005028515 A1 WO 2005028515A1 JP 2004014453 W JP2004014453 W JP 2004014453W WO 2005028515 A1 WO2005028515 A1 WO 2005028515A1
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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
- C07K16/2896—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against molecules with a "CD"-designation, not provided for elsewhere
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P3/00—Drugs for disorders of the metabolism
- A61P3/08—Drugs for disorders of the metabolism for glucose homeostasis
- A61P3/10—Drugs for disorders of the metabolism for glucose homeostasis for hyperglycaemia, e.g. antidiabetics
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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
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P5/00—Drugs for disorders of the endocrine system
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P5/00—Drugs for disorders of the endocrine system
- A61P5/06—Drugs for disorders of the endocrine system of the anterior pituitary hormones, e.g. TSH, ACTH, FSH, LH, PRL, GH
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P5/00—Drugs for disorders of the endocrine system
- A61P5/06—Drugs for disorders of the endocrine system of the anterior pituitary hormones, e.g. TSH, ACTH, FSH, LH, PRL, GH
- A61P5/08—Drugs for disorders of the endocrine system of the anterior pituitary hormones, e.g. TSH, ACTH, FSH, LH, PRL, GH for decreasing, blocking or antagonising the activity of the anterior pituitary hormones
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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
Definitions
- the present invention specifically binds to human insulin-like growth factor-1 (hereinafter, referred to as hIGF-I) and human insulin-like growth factor-11 (hereinafter, referred to as hIGF-II), and binds to human IGF-I and human IGF-I.
- Recombinant antibody or the antibody fragment capable of inhibiting the biological activity of IGF-II, a transformant producing the antibody or the antibody fragment, a method for producing the antibody or the antibody fragment, and the antibody or the antibody fragment
- the present invention relates to a medicine containing as an active ingredient. Background art
- IGF IGF plays an important role in controlling the proliferation, differentiation, and cell death (apoptosis) of epithelial cells in organs such as the breast, prostate, lung, and colon, and its biological activity is controlled by the IGF receptor (IGF receptor; , IGF-R) (Endocrine Reviews, 16, 3, 1995).
- IGF receptor IGF receptor
- IGF-R IGF receptor
- 10 types of IGF-binding proteins that not only suppress IGF metabolism but also regulate IGF transport and IGF binding to receptors
- IGFBP IGF-binding protein
- IGFs There are two types of IGFs, IGF-1 and IGF-II, which consist of single-chain polypeptides, and both have approximately 40% homology at the amino acid level with insulin precursor proinsulin. (Advances in Cancer Research, 68, 183, 1996). In vivo, there are insulin receptor, IGF-I receptor (hereinafter referred to as IGF-IR), IGF-II receptor (hereinafter referred to as IGF-I IR), and insulin receptor and IGF-IR. Of the hybrid receptors function as IGF receptors.
- Both insulin receptor and IGF-IR are tyrosine kinase receptors (Endocrine Reviews, 16—, 143, 1995, Breast Cancer Research & Treatment, 47, 235, 1998), and their homology at the amino acid level is about 60%.
- Insulin receptor and IGF-IR have high binding specificity for their specific ligands, insulin and IGF-I, but also bind to insulin, IGF-I or IGF-II (Journal of Biological Chemistry, m, 11486, 1988, Journal of Biological Chemistry, 268, 7393, 1993).
- the hybrid receptor consisting of insulin receptor and IGF-IR subunits has higher binding specificity for IGF-I than insulin and is considered to function as IGF-IR.
- IGF-IIR can bind to IGF-II in the IGF family, but does not have tyrosine kinase activity, and is thought to function as an antagonist of IGF-II.
- IGFBPs IGF-binding proteins
- IGF can be used for various types of cancers such as sarcoma, leukemia, prostate cancer, breast cancer, lung cancer, colon cancer, stomach cancer, esophageal cancer, liver cancer, Tengle cancer, kidney cancer, thyroid cancer, J! Tumor, ovarian cancer, uterine cancer, etc. And is known to have a strong increase! Promoting effect on these cancer cells (British Journal of Cancer, 65, 311, 1992; Anticancer Research, 11, 1591, 1991). Annals of Internal Medicine, 122, 54, 1995, Oncology, 5> 502,-1997s Endocrinology, 137, 1764, 1996). It is known that highly metastatic cancers have higher expression of IGF-II and IGF-IR than less metastatic cancers.
- Biomarkers & Preventions ⁇ , 1566, 2002, European Journal of Cancer, 29A, 492, 1993), glioma, lung cancer (Journal of the National Cancer, Insitute., 92> 737, 2000), colon cancer (Gut, 44) > 704, 1999), prostate cancer (cancer Research, 6 5 2942, 2002s Science, 279, 563, 1998), ovarian cancer (International Journal of cancer 101, 549 , 2002), bladder cancer (Journal of Urology, 169, 714 , 2003) and increased amounts of IGF or IGF-IR or serum IGF in many cancer tissues such as osteosarcoma (Journal of the National Cancer Institute, 92, 1472, 2000). Furthermore, it has been reported that the prognosis of patients with IGF-IR expression is poor (Cancer Research, 57, 3079, 1997).
- IGF-1 interferon or tumor necrosis factor having cell death-inducing activity
- primary cultured cells derived from glioblastoma multiforme patients have higher expression levels of IGF-IR and phosphorylated IGF-IR in radiation-resistant cancer cells compared to radiation-sensitive cancer cells.
- inhibition of the function of epidermal growth factor receptor in radiation-sensitive cancer cells resulted in increased expression of IGF-IR.
- IGF not only promotes the growth of cancer cells, but also enhances the survival signal of cancer cells via IGF-IR and is involved in acquiring drug resistance of cancer cells (Journal of the National Cancer Institute, 93> 1852, 2001, Oncogene, 20, 1913, 2001, Cancer Research, 60> 2007, 2000, Cancer Research, 62, 200, 2002).
- IGF-I and IGF-IR increase with acquisition of androgen-independent growth ability
- Cancer Research, 61, 6276, 2001 Most of the IGF in serum is produced in the liver, but in mice lacking IGF-1 only in the liver, growth of orthotopically transplanted colorectal cancer is suppressed. It is also known to be involved in proliferation (Cancer Research, 62> 1030, 2002).
- mice expressing IGF locally in the body the appearance or hyperplasia of tumor is observed (Oncogene, 1, 853, 2003, Cancer Research, 60, 1561, 2000, Journal of Biological Chemistry, 269, 13779, 1994).
- IGF, ipF-R, and IGFBP play important roles not only in cancer development, proliferation, and metastasis, but also in acromegaly, diabetic complications, and rheumatoid arthritis.
- anti-IGF-IR antibodies inhibit engraftment of human breast cancer cells showing estrogen-independent growth transplanted into mice, engraftment of human breast cancer cells showing estrogen-dependent growth and engraftment of human breast cancer cells It has been shown that the growth of E. coli is not suppressed, and it has been shown that inhibition of the action of IGF-IR alone does not provide a sufficient antitumor effect (Breast Cancer Research & Treatment, 22, 101, 1992).
- anti-hlGF antibodies Various antibodies are known as antibodies against IGF (hereinafter referred to as anti-hlGF antibodies).
- Representative antibodies against human IGF-I include anti-hlGF-1 mouse antibody sml.2 (Proceedings of the National Academy of Sciences of the United States of America, 81, 2389). , 1984)
- Examples of the antibody against human IGF-II include anti-hIGF-II mouse-antibody S1F2 (Endocrinology, 124, 870, 1989).
- sml.2 has a cross-reactivity of about 40% with IGF-II and about 10% with S1F2 with hlGF-1.
- hIGF-II-dependent cell growth can be inhibited.
- humanized antibodies such as human-type chimeric antibodies or human-type complementarity-determining region (hereinafter referred to as CDR) -grafted antibodies, are used to transfect non-human animal antibodies using gene recombination technology.
- CDR human-type complementarity-determining region
- a human chimeric antibody is an antibody in which the variable region (hereinafter referred to as V region) of the antibody is a non-human animal antibody and the constant region (hereinafter referred to as C region) is a human antibody.
- a human-type CDR-grafted antibody refers to the amino acid sequence of the CDR in the V region of an antibody of a non-human animal. It is an antibody transplanted into the appropriate location (Nature, 321, 522, 1986).
- These humanized antibodies have various advantages in clinical application to humans compared to non-human animal antibodies such as mouse antibodies. For example, with regard to immunogenicity and stability in blood, it has been reported that a human chimeric antibody has an approximately six-fold increase in blood half-life when administered to humans compared to a mouse antibody ( European Journal of Cancer, 29A, 492, 1993).
- human CDR-grafted antibodies have reduced immunogenicity and prolonged the half-life in the blood compared to mouse antibodies in experiments using monkeys (Cancer Research, 56 »1118, 1996, Immunology , 85.668, 1995). That is, humanized antibodies are expected to have fewer side effects than antibodies of non-human animals, and to maintain their therapeutic effects for a long period of time.
- humanized antibodies can be produced as various types of molecules because they are produced using genetic recombination technology.
- An object of the present invention is to specifically bind to IGF-I and IGF-II,
- An object of the present invention is to provide a drug or the like containing the antibody or the antibody fragment as an active ingredient.
- the present invention relates to the following (1) to (28).
- the recombinant antibody contains a heavy chain variable region (VH) and a light chain variable region (VL) complementarity determining region (CDR) of a monoclonal antibody against human IGF;
- VH heavy chain variable region
- VL light chain variable region
- CDR complementarity determining region
- VH complementarity determining region (CDR) of recombinant antibody or antibody fragment The recombinant antibody or the antibody fragment thereof according to (5), wherein CDR and CDR3 are represented by SEQ ID NOs: 5, 6, and 7, respectively.
- CDR1, CDR2 and CDR3 of VH of the recombinant antibody or antibody fragment are represented by SEQ ID NOS: 5, 6 and 7, respectively, and CDR1, CDR2 and CDR3 of VL are represented by SEQ ID NOs: 8 and 9, respectively.
- the recombinant antibody or the antibody fragment thereof according to any one of (5) to (7), which is represented by (10) or (10).
- the VH of the recombinant antibody or the antibody active fragment thereof has the first Gln, the eleventh Val, the 42nd Gly, the 75th Ser, and the 77th amino acid in the amino acid sequence represented by SEQ ID NO: 11.
- the recombinant antibody or the antibody fragment thereof according to any one of claims 1 to 7.
- the 'VL of the recombinant antibody or the antibody fragment has Met at the fourth position, Asp at the ninth position, Ser at the 10th position, Ser at the 10th position, Leu at the 11th position, Leu, 22nd Asn, 35th Tyr, 39th Pro, 42th Pro, 45th Leu, 46th Leu, 69th Asp, 70th Phe, 71th Thr, 82nd Val, the 84th Val of the amino acid sequence substituted with at least one amino acid selected from Val or the amino acid sequence represented by SEQ ID NO: 55, the fourth Met, the ninth Ser, the tenth Ser, 11th Leu, 15th Val, 35th Tyr, 39th Pro, 42th Ala, 45th Leu, 46th Leu, 69th Asp, 70th Phe, 71th Thr,
- the amino acid sequence according to any one of (5) to (8), including an amino acid sequence in which at least one amino acid selected from the 82nd Phe is substitute
- VH of the recombinant antibody or the antibody fragment thereof is represented by SEQ ID NO: 11; the first 0111, the 11th ⁇ & 1, the 42nd 0, the 75th 861 ⁇ 77th
- the amino acid sequence in which at least one amino acid selected from Ser, 77th Asn, 84th Asn, 84th Asn, 93rd Val, 97th Ala, 98th Arg has been substituted, and VL is SEQ ID NO: 14.
- the VH of the recombinant antibody or the antibody fragment is represented by SEQ ID NO: 11, 1st Gln, 11th Val, 42nd Gly, 75th Ser, 77th- An amino acid sequence in which at least one amino acid selected from the group consisting of Asn of the order 84, Asn at position 84, Val at position 93, Ala at position 97, and Arg at position 98, and VL are represented by SEQ ID NO: 14
- SEQ ID NO: 14 In the amino acid sequence, 4th Met, 9th Asp, 10th Ser, 11th Leu, 15th Leu, 22nd Asn, 35th Tyr, 39th Pro, 42nd Pro, 45th Leu, 46th Leu, 69th Asp, 70th Phe, 71st Thr, 82th Val, 84th Val
- the recombinant antibody or the antibody fragment thereof according to any one of (5) to (11), further comprising an amino acid sequence in which one amino acid is substituted.
- VH of the recombinant antibody or the antibody fragment is represented by SEQ ID NO: 5 ⁇ of which Ser at position 49, Asn at position 77, Asn at position 84, Val at position 93, Ala at position 97 And an amino acid sequence in which at least one amino acid selected from the 98th Arg is substituted, and VL is the fourth amino acid sequence represented by SEQ ID NO: 55, the fourth Met, the ninth Se], 10th Ser, 11th Leu, 15th Val, 35th Tyr, 39th ⁇ ⁇ ⁇ , 42nd Ala, 45th Leu, 46th Leu, 69th Asp, 70th
- the recombinant antibody according to any one of (5) to (: 11), comprising an amino acid sequence in which at least one amino acid selected from Phe, 71st Thr, and 82nd Phe is substituted. Or said antibody fragment.
- the recombinant antibody according to any one of (5) to (8) or (12), wherein the VH of the recombinant antibody or the antibody fragment comprises the amino acid sequence represented by SEQ ID NO: 26; Or said antibody fragment.
- VH of the recombinant antibody or the antibody fragment contains the amino acid sequence represented by SEQ ID NO: 26, and VL ′ contains the amino acid sequence represented by SEQ ID NO: 27, 28 or 29. 8), (12), (14) or (15).
- VH of the recombinant antibody or the antibody fragment contains the amino acid sequence represented by SEQ ID NO: 26, and VL contains the amino acid sequence represented by SEQ ID NO: 27 (5) to (8), (12) ), The recombinant antibody or the antibody fragment thereof according to any one of (14) to (16).
- VH of the recombinant antibody or the antibody fragment contains the amino acid sequence represented by SEQ ID NO: 26, and VL contains the amino acid sequence represented by SEQ ID NO: 28 (5)
- VL contains the amino acid sequence represented by SEQ ID NO: 28 (5)
- VH of the recombinant antibody or the antibody fragment contains the amino acid sequence represented by SEQ ID NO: 26, and VL contains the amino acid sequence represented by SEQ ID NO: 29 (5) to (8), (12) ), The recombinant antibody or the antibody fragment thereof according to any one of (14) to (16).
- the transformant according to (24) is cultured in a medium, and the recombinant antibody or the antibody fragment according to any one of (1) to (21) is produced in the culture.
- a method for producing a recombinant antibody or an antibody fragment comprising the steps of accumulating, isolating and purifying the recombinant antibody or the antibody fragment from the culture.
- a medicament comprising the recombinant antibody or the antibody fragment according to any one of (1) to (21) as an active ingredient.
- a therapeutic agent for an IGF-related disease comprising the recombinant antibody or the antibody fragment according to any one of (1- (21)) as an active ingredient.
- the recombinant antibody or the antibody fragment of the present invention includes a recombinant antibody or the antibody that specifically binds to hIGF-1 and hIGF-II and inhibits the biological activity of hIGF-I and hlGF-II.
- As the fragment any recombinant antibody or its antibody fragment is included, but a recombinant antibody or its antibody fragment having similar binding strength to hIGF-I and hlGF-II is preferable.
- the recombinant antibody or the antibody fragment thereof capable of specifically binding to hIGF-I and hlGF-II of the present invention is, for example, a monoclonal antibody against hIGF-I which has a cross-reactivity with hlGF-II.
- the antibody or a monoclonal antibody against hIGF-II can be prepared from a monoclonal antibody having cross-reactivity with hIGF-I by a genetic engineering technique.
- the fact that the antibody has the same binding strength to hIGF-I and hIGF-11 means that the antibody has the same binding activity to hIGF-I and hIGF-11.
- the binding activity can be quantified by a known measuring method.
- Known methods include a biosensor method using enzyme immunoassay (hereinafter referred to as ELISA) and the principle of surface plasmon resonance (Journal of Immunological Methods 145, 229, 1991). , And biosensor Biacore). In the measurement using the biosensor Biacore, a slight change in mass generated on the sensor chip surface due to the binding and dissociation between two molecules is detected as an SPR signal by an optical phenomenon.
- Examples of the ELISA method include, for example, a method of comparing the results of IGF-1 and IGF-II obtained by an ELISA method for measuring the amount of an antibody bound to an immobilized antigen, and a similar ELISA method.
- the antigen is added simultaneously with the antibody reaction, and the decrease in the amount of the antibody bound to the immobilized antigen is measured by the competitive EUSA method (Antibodies; A laboratory Manual, Cold Spring Harbor Laboratory, Chapter 14, 1988).
- Methods for comparing the results obtained for IGF-I and IGF-II include methods for measuring the binding activity of the antibody to both IGF-I and IGF-II.
- the antibody has the same level of binding activity to hIGF-I and hIGF-II Is a comparison of the binding activity of the antibody to hlGF-1 and hIGF- ⁇ , quantified by the above method, and assuming that the binding activity of the antibody to hlGF-1 is 1, the binding activity to MGF- ⁇ Is from 0.1 to 10, preferably from 0.2 to 5, more preferably from 0.5 to 2, and most preferably 1.
- the ability to inhibit the biological activity of both WGF-I and hlGF-II refers to the ability to inhibit signaling from MGF-1 and hlGF-II through a receptor specific for hIGF-I or hIGF-II, -Inhibits the biological activity of hlGF-1 and hlGF-II, for example, inhibits the binding of hlGF-1 and hlGF-II to hIGF-I or hlGF-II specific receptor I can do it.
- the activity of such antibodies to inhibit the biological activity of the antigen is also referred to as neutralizing activity of the antibody.
- Examples of the biological activity of hIGF-I and hIGF-II include an activity of promoting cell proliferation via a receptor specific for hIGF-I or hlGF-II.
- the receptor specific for hIGF-I or hlGF-II refers to a receptor capable of binding to hlGF-1 or hIGF-II, and includes IGF-1 receptor, IGF-II receptor, insulin receptor and A hybrid receptor of IGF-1 and insulin receptor;
- the recombinant antibody or the antibody fragment of the present invention includes any gene set as long as it has the ability to specifically bind to hIGF-I and hIGF-II and inhibit the functions of hIGF-I and hlGF-II.
- biosensor - properly preferred binding constant to human IGF-I and human IGF II is measured by Biacore is 1 X 10 - 1 or more, more preferably 2 X lO ⁇
- a recombinant antibody or an antibody fragment having I 1 or more, more preferably 3 ⁇ 10 or more, and most preferably ⁇ - 1 or more is suitably used.
- the recombinant antibody of the present invention refers to an antibody produced using a genetic engineering technique.
- a recombinant antibody preferably comprises a recombinant antibody comprising the constant region of a human antibody, more preferably a framework comprising the constant region and the variable region of a human antibody (hereinafter referred to as FR).
- FR a human antibody
- Recombinant antibodies are preferred.
- Such a recombinant antibody is, for example, a human chimeric antibody, a human complementation antibody.
- Constant domain transplanted antibodies, human antibodies produced from hybridomas produced by transgenic non-human animals, and human antibodies monocloned using genetic engineering techniques, etc.
- CDR Constant domain transplanted antibodies
- human antibodies produced from hybridomas produced by transgenic non-human animals and human antibodies monocloned using genetic engineering techniques, etc.
- gene recombination created by linking the CDR of an antibody selected from an artificially created antibody gene library to an appropriate human antibody FR, etc., and further linking it to a human antibody constant region, etc.
- Antibodies and the like are also included.
- the human chimeric antibody comprises a variable region of an antibody heavy chain of a non-human mammal (hereinafter, the variable region is referred to as a V region, the heavy chain is referred to as HV or VH as a heavy chain) and an antibody light chain variable region (hereinafter, referred to as a light chain).
- any mammals such as mice, rats, hams, and rabbits can be used as long as they can produce hybridomas.
- Human-type chimeric antibodies are obtained by obtaining cDNAs encoding VH and VL from hybridomas that produce monoclonal antibodies, and transforming them into expression vectors for host cells that have genes encoding human antibodies CH and CL.
- a human-type chimeric antibody expression vector can be constructed by inserting each of them, and can be expressed and produced by introducing into a host cell. »
- the CH of the human-type chimeric antibody may be any CH as long as it belongs to human immunoglobulin (hereinafter, referred to as hlg).
- the CH of the hlgG class is preferable. Any of the subclasses, such as the ⁇ 3 and ⁇ 4 classes, can be used.
- the CL of the human chimeric antibody may be any CL as long as it belongs to hlg, and A: class or human class can be used.
- the human chimeric antibody of the present invention includes any human chimeric antibody that specifically binds to hIGF-I and hIGF-II and has the ability to inhibit the functions of hIGF-I and hIGF-II. But specifically, anti-hIGF rat monoclonal
- a human chimeric antibody produced based on KM1468 (FERM BP-7978), a human chimeric antibody comprising the amino acid sequence of VH of SEQ ID NO: 2 and / or VL of SEQ ID NO: 4, and a transformant KM3002 (FERM BP-7996), and an anti-hIGF human chimeric antibody KM3002.
- the human CDR-grafted antibody means an antibody produced by grafting VH and VL CDRs of an antibody of a non-human animal into an appropriate position in VH and VL of a human antibody.
- the human CDR-grafted antibody is designed by designing the amino acid sequence of the V region obtained by grafting the amino acid sequences of CDRs of VH and VL of an antibody of a non-human animal to FR sequences of VH and VL of a human antibody. Constructing a cDNA encoding the sequence, inserting the cDNA into a host cell expression vector having genes encoding CH and CL of a human antibody to construct a human CDR-grafted anti-expression vector, By introducing the antibody into a host cell, a human CDR-grafted antibody can be expressed and produced.
- the amino acid sequences of the VH and VL CDRs of non-human animal antibodies were grafted into the VH and VL FR sequences of human antibodies, and the amino acid sequences of the V region were designed by introducing several mutations. Is also good.
- the cDNA encoding the amino acid sequence designed in this manner can be obtained from Molecular Cloning: A Laboratory Manual, Cold Spring Harbor Lab. Press New York, 1989, Current Protocols in Molecular Biology, Nucleic Acids Research, 10, 6487 (1982), Acad. Sci., USA, 79, 6409 (1982), Gene, 34, 315 (1985), Nucleic Acids Research, 13, 4431 (1985), Proc. Natl. Acad.
- the number of amino acids to be substituted is one or more, and the number is not particularly limited. The number is such that deletion, substitution, or addition can be performed by well-known techniques such as the site-directed mutagenesis described above. For example, the number is 1 to several tens, preferably 1 to 20, more preferably 1 to 10, and still more preferably 1 to 5.
- the CH of the humanized CDR-grafted antibody may be any CH as long as it belongs to hlg, but the hlgG class is preferable, and further, subclasses such as a1, r2s a3 and a4 classes belonging to the hlgG class. Can be used.
- Human type n The CL of the chimeric antibody may be any CL as long as it belongs to hlg, and a class or ⁇ class CL can be used.
- the human CDR-grafted antibody of the present invention is a human CDR-grafted antibody that specifically binds to hIGF-I and hlGF-II and has the ability to inhibit the functions of hIGF-I and hIGF-II.
- any type preferably a human CDR-grafted antibody containing CDRs of VH and VL of anti-human IGF antibody, anti-hlGF rat monoclonal KM1468 produced by rat hybridoma KM1468 (FERM BP-7978)
- Human-type CDR-grafted antibody containing VH and VL CDRs, antibody VH CDR1, CDR2, and CDR3 are sequence numbers 5, 6, 7, and / or antibody VL CDR1, CDR2, and CDR3 are sequence.
- the VH of the antibody is the first amino acid sequence represented by SEQ ID NO: 11 Gln, 11th Val, 42nd Gly, 75th Ser, 77th An amino acid sequence in which at least one amino acid selected from the group consisting of Asn, 84th Asn, 93rd Val, 97th Ala, 98th Arg has been substituted, and the amino acid sequence represented by SEQ ID NO: 54 An amino acid sequence selected from the amino acid sequence of at least one amino acid selected from Ser at position 49, Asn at position 77, Asn at position 84, Val at position 93, Ala at position 97, and Arg at position 98 Among the amino acid sequences represented by SEQ ID NO: 14 in which the human CDR-grafted antibody contains the VL of the antibody, the fourth Met, the ninth Asp, the tenth Ser, the eleventh Leu, the fifteenth Leu, 22nd Asn, 35th Tyr, 39th Pro, 42nd Pro, 45th Leu
- SEQ ID NO: 14 the amino acid sequence represented by
- 13 ⁇ 4 VH of the amino acid sequence represented by SEQ ID NO: 11 is the first Gln, the 11th Val, the 42nd Gly, the 75th Ser, the 77th Asn, the 84th Asn, the 93rd Val Of the amino acid sequence in which at least one amino acid selected from Ala at position 97 and Arg at position 98 has been substituted and the amino acid sequence represented by SEQ ID NO: 54, Ser at position 49, Asn at position 77, position 84 at position 84 Contains an amino acid sequence selected from amino acid sequences in which at least one amino acid selected from the group consisting of Asn, 93rd Val, 97th Ala, and 98th Ar is substituted, and the VL of the antibody is represented by SEQ ID NO: 14.
- a human CDR-grafted antibody comprising an amino acid sequence selected from amino acid sequences substituted with at least one amino acid selected from the 82nd Phe is preferable, and the VH of the antibody is the amino acid sequence represented by SEQ ID NO: 11.
- At least one of Gln, 11th Val, 42th Gly, 75th Ser, 77th Asn, 84th Asn, 93rd Val, 97th Ala, 98th Arg Contains an amino acid sequence in which one amino acid has been substituted, and the VL of the antibody is the sequence Of the amino acid sequence represented by No.
- 1 J 6 The amino acid sequence of which at least one amino acid selected from the Ala of the eye and the 98th Arg is substituted, and wherein the VL of the antibody is the fourth Met, the ninth Ser, or the ninth amino acid of the amino acid sequence represented by SEQ ID NO: 55; 10th Ser, 11th Leu, 15th Val, 35th Tyr, 39th Pro, 42th Ala, 45th Leu, 46th Leu, 69th Asp, 70th Phe, The 71st Thi?
- a human CDR-grafted antibody comprising an amino acid sequence in which at least one amino acid selected from Phe at position 82 has been substituted; Ser at position 49 in the amino acid sequence wherein the VH of the antibody is represented by SEQ ID NO: 54; It contains an amino acid sequence in which at least one amino acid selected from Asn at position 84, Asn at position 84, Val at position 93, Ala at position 97, and Arg at position 98, and is represented by antibody VL SEQ ID NO: 14 Of the amino acid sequence, 4th Met, 9th Asp, 10th Ser, 11th Leu, 15 'Leu, 22nd Asn, 35th Tyr, 39th Pro, 42nd Pi at least one amino acid selected from o, Leu at position 45, Leu at position 46, Asp at position 69, Phe at position 70, Thr at position 71, Val at position 82, and Val at position 84
- a human CDR-grafted antibody in which the VH of the antibody comprises the amino acid sequence represented by SEQ ID NO: 26, the amino acid sequence represented by the antibody VL represented by SEQ ID NO: 27, the amino acid sequence represented by SEQ ID NO: 28 or A human CDR-grafted antibody comprising the amino acid sequence represented by SEQ ID NO: 29, the VH of the antibody comprising the amino acid sequence represented by SEQ ID NO: 26, and the VL of the antibody comprising the amino acid sequence represented by SEQ ID NO: 27 Human CDR-grafted antibody,
- VH of an antibody comprises the amino acid sequence represented by SEQ ID NO: 26 and VL of the antibody comprises the amino acid sequence represented by SEQ ID NO: 28.
- the human CDR-grafted antibody and VH of the antibody are represented by SEQ ID NO: 26.
- a human CDR-grafted antibody comprising an amino acid sequence and an amino acid sequence in which the VL of the antibody is represented by SEQ ID NO: 29 can be mentioned.
- human antibody examples include a human antibody produced from a hybridoma prepared from a genetically modified non-human animal, and a human antibody monocloned using a genetic engineering technique.
- human antibody refers to an antibody that naturally exists in the human body, but recent advances in genetic engineering, cell engineering, and developmental engineering have made it possible to produce monoclonal human antibodies.
- the human antibody of the present invention includes any human antibody that specifically binds to hIGF-1 and hlGF-II and has the ability to inhibit the functions of hIGF-I and hlGF-II.
- human antibody-producing cells are prepared by genetic engineering techniques or cell engineering techniques, and ordinary hybridoma production methods are used from human antibodies produced by the cells or from transgenic non-human animals derived from human antibody Hikosei. And monoclonal antibodies obtained by the method described above.
- Methods for producing human antibody-producing cells by genetic engineering techniques include, for example, inserting an antibody gene prepared from human B cells into a phage gene to produce Fab (Fragment of antigen binding), single-chain antibody, etc.
- a human antibody phage library in which antibody fragments are expressed on the phage surface is prepared, and phages expressing antibody fragments having the desired antigen-binding activity are recovered using the binding activity to the substrate on which the antigen is immobilized as an index.
- the antibody fragment may be further converted into a human antibody molecule consisting of two complete H chains and two complete L chains by a protein engineering technique.
- Methods for producing human antibody-producing cells by cell engineering techniques include, for example, isolating human peripheral blood lymphocytes, infecting them with EB virus, etc., and immortalizing them. Through a subculture capable of producing the antibody
- a CDR of an antibody selected from an artificially prepared antibody gene library is ligated to an appropriate human antibody FR or the like, and further linked to a human antibody constant region or the like to prepare a recombinant antibody
- artificial antibody gene libraries include an antibody gene library prepared from a population of antibody-producing cells and an antibody gene library in which the repertoire of the library is increased by introducing random mutations into the antibody gene library. Is included.
- the antibody fragment of the present invention contains a part or all of the variable region of the above antibody, specifically binds to hIGF-I and hlGF-II, and inhibits the function of hIGF-I and hlGF-II. And the like.
- the antibody fragment include peptides containing Fab, F (ab ') 2 , Fab ⁇ scFv, diabody, dsFv, and CDR shown below.
- Fab is a fragment obtained by treating IgG with proteolytic enzyme papain (which is cleaved at amino acid residue 224 of H chain). About half of the N-terminal side of H chain and the entire L chain are disulfide bonds. This is an antibody fragment having a molecular weight of about 50,000 and having an antigen-binding activity.
- the Fab of the present invention can be obtained by treating an antibody capable of specifically binding to hIGF-I and hlGF-II and inhibiting the function of hlGF-1 and hIGF-II with proteolytic enzyme papain.
- a 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.
- F (ab ') 2 is a fragment obtained by treating IgG with the protease pepsin (which is cleaved at the 234th amino acid residue in the H chain), and Fab binds via a disulfide bond in the hinge region. It is an antibody fragment with a molecular weight of about 100,000 and having antigen-binding activity, which is slightly larger than the bound one.
- the F (ab ') 2 of the present invention specifically binds to hIGF-I and hIGF-II, and treats an antibody capable of inhibiting the functions of hIGF-1 and hIGF- ⁇ with the protease pepsin. Can be obtained.
- Fab ′ is an antibody fragment having a molecular weight of about 50,000 and having an antigen-binding activity in which a disulfide bond in the hinge region of F (a!) ′) 2 is cut.
- the Fab ′ of the present invention specifically binds to hIGF-1 and hIGF-II, and treats F (ab ′) 2 having the ability to inhibit the function of hIGF-I and hIGF-II by dithiothreitol treatment with a reducing agent.
- F (ab ′) 2 having the ability to inhibit the function of hIGF-I and hIGF-II by dithiothreitol treatment with a reducing agent.
- a DNA encoding the FalD 'fragment of the antibody is inserted into a prokaryotic expression vector or a eukaryotic expression vector, and the vector is expressed by introducing the vector into a prokaryotic or eukaryotic organism.
- scFv is a polypeptide in which one VH and one VL are linked in the order of VH-P-VL or VL-P-VH using an appropriate peptide linker (hereinafter referred to as P).
- P an appropriate peptide linker
- the scFv of the present invention specifically binds to hIGF- ⁇ and hIGF-II, and obtains a cDNA encoding VH and VL of an antibody capable of inhibiting the functions of hIGF-I and hIGF-II,
- a scFv-encoding DNA is constructed, the DNA is introduced into a prokaryotic expression vector or a eukaryotic expression vector, and the expression vector is introduced into a prokaryotic or eukaryotic organism to express the scFv.
- a diabody is an antibody fragment obtained by dimerizing scFv and has a bivalent antigen-binding activity.
- the divalent 'antigen-binding activity of a diabody can be the same, or one can have a different antigen-binding activity.
- the diabody of the present invention specifically binds to hIGF-1 and hIGF-II, and obtains a cDNA encoding VH and VL of an antibody capable of inhibiting the functions of hIGF-I and hIGF-II,
- the scFv-encoding DNA is constructed so that the length of the amino acid sequence of P is 8 residues or less, and the DNA is expressed in a prokaryotic or eukaryotic expression vector.
- Diabody can be expressed by introducing the expression vector into a prokaryote or a eukaryote.
- dsFv refers to a polypeptide in which each amino acid residue in VH and VL is substituted with a cysteine residue, and the polypeptide is linked via a disulfide bond between the cysteine residues.
- the amino acid residue to be substituted for the cysteine residue can be selected based on the prediction of the antibody steric structure according to the method shown by Reiter et al. (Protein Engineering, 7, 697-704, 1994).
- DsFv of the present day obtained cDNA encoding VH and VL of an antibody capable of specifically binding to hlGF-1 and hlGF-II and inhibiting the function of hIGF-I and IGF-II, and obtaining dsFv Is constructed, inserted into a prokaryotic expression vector or a eukaryotic expression vector, and expressed by introducing the expression vector into a prokaryotic or eukaryotic organism. To produce dsFv.
- the peptide containing the CDR comprises at least one region of CDR of VH or VL.
- Peptides containing multiple CDRs can be linked directly or via an appropriate peptide linker.
- the peptide containing the CDR of the present invention binds specifically to hlGF-1 and hlGF-II and has antibodies capable of inhibiting the functions of hIGF-I and hlGF-II.
- Antibodies encoding VH and VL CDRs A is constructed, the DNA is inserted into a prokaryotic expression vector or an eukaryotic expression vector, and the expression vector is expressed by introducing the expression vector into a prokaryotic or eukaryotic organism.
- Peptides can be produced.
- peptides containing CDRs can be produced by chemical synthesis methods such as the Fmoc method (fluorenylmethyloxycarbonyl method) and the tBoc method (t-butyloxycarbonyl method). .
- the antibodies of the present invention include antibody derivatives of the present invention in which a radioisotope, a low-molecular-weight drug, a high-molecular-weight drug, a protein, and the like are genetically or chemically bound to the antibody and the antibody fragment of the present invention.
- Derivatives of the engineered antibodies of the present invention include hIGF-I and hlGF-II DNA that encodes antibodies and antibody fragments that have the ability to inhibit the function of IGF-I and hIGF-II, and that binds to the protein to be bound. It can be produced by inserting into a vector, introducing the expression vector into a suitable host cell, and expressing it.
- the chemically conjugated antibody derivative of the present invention can be used to specifically bind to hIGF-1 and hIGF-II and to inhibit the function of hIGF-1 and hlGF-II.
- the radioisotope includes 131 I, I and the like.
- it can be bound to an antibody by the chloramine T method or the like.
- Low molecular drugs include alkylating agents such as nitrogen mustard and cyclophosphide, antimetabolites such as 5-fluorouracil and methotrexate, antibiotics such as daunomycin, bleomycin, mitomycin C, daunorubicin, doxorubicin, and the like.
- Plant alkaloids such as vincristine, vinblastine, and vindesine
- anticancer drugs such as hormonal drugs such as evening moxifen and dexamethasone (Clinical Oncology, edited by the Japanese Society for Clinical Oncology, Cancer and Chemotherapy, 1996); Steroids such as cortisone and prednisone, non-steroids such as aspirin and indomethacin, immunomodulators such as gold thiomalate and penicillamine, immunosuppressants such as cyclophosphamide and azathioprine, maleic acid Rufue two Ramin, anti-inflammatory agents, such as anti-His evening Min agents such as Kuremashichin (Inflammation and anti-inflammatory therapy, Ishiyaku Shuppan, 1982) and the like, such as.
- a method for binding daunomycin to an antibody a method for binding between daunomycin and an amino group of the antibody via gludealdehyde, and a method for linking the amino group of daunomycin to the carboxyl group of the antibody via water-soluble ruposimide.
- Examples of the high molecular drug include polyethylene glycol (hereinafter, referred to as PEG), albumin, dextran, polyoxyethylene, styrene maleic acid copolymer, polyvinylpyrrolidone, pyran copolymer, and hydroxypropyl methacrylamide.
- PEG polyethylene glycol
- albumin dextran
- polyoxyethylene polyoxyethylene
- styrene maleic acid copolymer polyoxyethylene
- styrene maleic acid copolymer polyvinylpyrrolidone
- pyran copolymer polyvinylpyrrolidone
- hydroxypropyl methacrylamide hydroxypropyl methacrylamide
- PEGylation modifying reagents for PEGylation include the modification of lysine £ -amino group (JP-B-61-178926), the modification of carboxyl group of aspartic acid and glutamic acid (JP-B-56-23587), and the modification of guanidino group of arginine.
- ⁇ Multiple decorating agents Tokuhei 2-117920).
- Proteins include cytokins that activate immunocompetent cells, for example, human inducible leukin 2 (hereinafter referred to as hIL-2), human granulocyte macrophage colony stimulating factor (hereinafter referred to as hGM-CSF) And human macrophage colony stimulating factor (hereinafter referred to as hM-CSF), human influenza leukin-12 (hereinafter referred to as hIL-12) and the like. Further, toxins such as ricin and diphtheria toxin having an activity of directly damaging cancer cells can be used.
- hIL-2 human inducible leukin 2
- hGM-CSF human granulocyte macrophage colony stimulating factor
- hM-CSF human macrophage colony stimulating factor
- hIL-12 human influenza leukin-12
- toxins such as ricin and diphtheria toxin having an activity of directly damaging cancer cells can be used.
- a DNA encoding a fusion antibody in which a cDNA encoding the body and the antibody fragment is linked to a cDNA encoding the protein is constructed, and the DNA is used as a prokaryotic or eukaryotic organism.
- a fusion antibody can be produced by inserting the expression vector into a prokaryote or eukaryote and expressing the expression vector.
- an antibody expression vector into which a gene encoding human antibody CH and / or CL has been incorporated, the human antibody CH and CL should be added to an animal cell expression vector. It can be constructed by cloning the encoding gene.
- the C region of a human antibody can be CH and CL of any human antibody.
- the C region of the IgGl subclass of the H chain of the human antibody hereinafter referred to as hC ⁇ 1
- the L chain of the human antibody C region of the class hereinafter referred to as' hC.
- genes encoding human antibody CH and CL chromosomal DNA or cDNA consisting of exon and intron can also be used.
- Any expression vector for animal cells can be used as long as it can integrate and express the gene encoding the C region of the human antibody.
- PAGE107 (Cytotechnology, 3, 133, 1990)
- pAGEi03 (Journal of Biochemistry, 101, 1307, 1987)
- pHSG 74 Gene, 27, 223, 1984
- pKCR Proceedings of the National Academy of Sciences of the United) States of America, 78, 1527, 1981
- pSGl-d2-4 “Cytotechnology, 4, m, 1990).
- Promoters and enhancers used in animal cell expression vectors include the SV40's Early Promoter and Enhansa (Journal of Biochemistry, 101, 1307, 1987) and Moroni Mouse Leukemia Virus LTR Promoter. Enhansa I
- the humanized antibody expression vector must be either a type in which the antibody H-chain and L-chain are on separate vectors or a type in which the antibody is on the same vector (hereinafter referred to as tandem type). But the ease of construction of a humanized antibody expression vector, the ease of introduction into animal cells, and the use of antibody H and L chains in animal cells. From the viewpoint that the balance of expression levels is balanced, etc., a vector for expressing a humanized antibody of the evening type is preferred (Journal of Immunological Methods, 167, 271, 1994). Examples of tandem humanized antibody expression vectors include pKANTEX93 (WO97 / 10354) and pEE18 (Hybridoma, 17, 559, 1998).
- the constructed humanized antibody expression vector can be used for the expression of a hidden chimeric antibody and a human CDR-grafted antibody in animal cells.
- CDNAs encoding non-human animal antibodies for example, VH and VL of mouse antibodies, are obtained as follows.
- Extract mRNA from hybridomas producing mouse antibodies and synthesize cDNA Cloning the synthesized cDNA into a vector such as phage or plasmid to prepare a cDNA library. From the library, a recombinant phage having a cDNA encoding VH or a recombinant plasmid having a cDNA encoding VL and a cDNA encoding VL using the C region or V region of a mouse antibody as a probe. Isolate the recombinant phage or recombinant plasmid.
- the entire nucleotide sequence of VH and VL of the target mouse antibody on the recombinant phage or recombinant plasmid is determined, and the entire amino acid sequence of VH and VL is deduced from the nucleotide sequence.
- any mouse, rat, hamus, rabbit, etc. can be used as long as it is capable of producing a hybridoma.
- the method for preparing total RNA from hybridomas is guanidine thiocyanate-cesium trifluoroacetate method (Methods in Enzymology, 154, 3, 1987) .
- the method for preparing mRNA from total RM is oligo (dT) immobilization. Pressurized Cellulose Cell Method (Molecular Cloning: A Laboratory Manual, Cold Spring Harbor Lab. Press New York, 1989).
- Kits for preparing mRNA from hybridomas include Fast Track mRNA Isolation Kit (Invitrogen), The Quick Prep niRNA Purification Kit (manufactured by Amerchara Pharmacia) and the like.
- any vector can be used as a vector for incorporating a cDNA synthesized as a type II mRNA extracted from a hybridoma, as long as the vector can incorporate the cDNA.
- ZAP Express (Strategies, '5, 58, 1992), pBluescript II SK (+) (Nucleic Acids Research, 17, 9494, 1989), input ZAP II (Stratagene), AgtlO ⁇ Agtll (DNA Cloning: APractical Approach, I, 49, 1985), Lambda BlueMid (manufactured by Clontech), AExCelU pT7T3 18U (Amersham-Pharmacia3 ⁇ 4) PcD2 (Molecular & Cellular Biology, 3, 280, 1983) and PUC18 (Gene, M, 103, 1985).
- Phage or plasmid vectors are used. Escherichia coli into which a cDNA library constructed from a phage or a plasmid vector is introduced can be used as long as the cDNA library can be introduced, expressed and maintained. For example, XU-Blue MRF '
- Methods for selecting cDNA clones encoding the VH and VL of non-human animal antibodies from the cDNA library include radioisotope or fluorescent labeling, or
- 2 ⁇ Selection can be made by colony-hybridization method or plaque-hybridization method using an enzyme-labeled probe (Molecular Cloning: A Laboratory Manual Cold Spring Harbor Lab. Press New York, 1989). Further, a primer was prepared, and a cDNA or a cDNA library synthesized from mA was used as a type II for polymerase chain reaction (hereinafter referred to as PCR method); Molecular Cloning: A Laboratory Manual, Cold Spring Harbor Lab. Press New York ⁇ cDNA encoding VH and VL can also be prepared according to Current Protocols in Molecular Biology, Supplement 1-34).
- the cDNA selected by the above method is digested with an appropriate restriction enzyme or the like, and then cloned into a plasmid vector such as Bluescript SK (-) (manufactured by Stratagene), and a commonly used nucleotide sequence analysis method, for example, the dideoxy method (Proceedings of the National Academy of Sciences of the United States of America, 74> 5463, 1977), etc., and a base sequence automatic analyzer, for example, a base sequence automatic analyzer ABI '' PRISM 377 (Applied Biosystems) ) Can be used to determine the nucleotide sequence of the cDNA.
- a plasmid vector such as Bluescript SK (-) (manufactured by Stratagene)
- a commonly used nucleotide sequence analysis method for example, the dideoxy method (Proceedings of the National Academy of Sciences of the United States of America, 74> 5463, 1977), etc.
- a base sequence automatic analyzer for
- the length of the secretory signal sequence and the N-terminal amino acid sequence can be estimated, and the subgroup to which they belong can be known.
- the amino acid sequences of the CDRs of VH and VL the amino acid sequences of known antibodies (Sequences of Proteins of Immunological Interest, US Dept. Health and Human Services,
- BLAST Journal of Molecular Biology, 215, 403-410, 1990
- VH and VL such as SWISS-PROT and PIR-Protein.
- a sequence homology search can be performed to examine the novelty of the sequence.
- VH and VL of a non-human animal antibody are encoded upstream of the genes encoding the CH and CL of the human antibody in the humanized antibody expression vector described in 2 (1) above.
- the cloned cDNA can be used to construct a human chimeric antibody expression vector.
- a cDNA encoding VH and VL of an antibody of a non-human animal can be obtained by combining the nucleotide sequence at the 3 'end of VH and VL of an antibody of a non-human animal with the nucleotide sequence of CH and CL of a human antibody.
- 'Synthetic DNA consisting of a base sequence on the terminal side, or a synthetic DNA having an appropriate restriction enzyme recognition sequence at each end, and ligating each of them, and then ligating them to the humanized vector for humanized antibody expression described in 2 (1) above.
- the human chimeric antibody expression vector can be constructed by cloning upstream of the genes encoding the antibodies CH and CL so that they can be expressed in an appropriate form.
- a plasmid containing cDNA encoding the VH and VL of an antibody of a non-human animal is used as a type III plasmid, and the VH and VL are determined by PCR using a primer having an appropriate restriction enzyme recognition sequence at the 5 'end. And amplify the cDNA upstream of the genes encoding CH and CL of the human antibody for expression of the humanized antibody described in 2 (1) above.
- a human-type chimeric antibody expression vector can be constructed.
- CDNA encoding VH and VL of the human CDR-grafted antibody can be constructed as follows. First, the amino acid sequences of FRs of VH and VL of a human antibody to which the amino acid sequences of CDRs of the VH and VL of the antibody of the desired non-human animal are transplanted are selected. As the amino acid sequence of FRs of VH and VL of a human antibody, any amino acid sequence derived from a human antibody can be used. For example, Protein Data Amino acid sequences of FRs of VH and VL of human antibodies registered in databases such as Bank, and common amino acid sequences of subgroups of FRs of VH and VL of human antibodies (Sequences of Proteins of Immunological Interest, US Dept.
- the designed amino acid sequence is converted into a nucleotide sequence in consideration of the frequency of codon usage found in the nucleotide sequence of the antibody gene (Sequences of Proteins of Immunological Interest, US Dept. Health and Human Services, 1991), and the human CDR Design a nucleotide sequence that encodes the VH and VL amino acid sequences of the transplanted antibody.
- Based on the designed base sequence several synthetic DNAs with a length of around 100 bases are synthesized and ligated by PCR. In this case, it is preferable to design 4 to 6 synthetic DNAs for both VH and VL, based on the reaction efficiency of the PGR and the length of the synthesizable DNA.
- nucleotide sequence is determined by the method described in 2 (2) above, and the nucleotide sequence encoding the amino acid sequence of VH and VL of the desired human CDR-grafted antibody is obtained. Is obtained.
- a human CDR-grafted antibody is obtained by grafting only the VH and VL CDRs of the target non-human animal antibody to the human antibody VH and VL FRs. Is known to be lower than
- VH and VL of the original non-human animal antibody have not only the amino acid residues of CDR but also some amino acid residues of FR directly. Are involved. It is thought that at the time of CDR transplantation, those amino acid residues are changed to amino acid residues derived from FR of human antibody VH and VL. For this reason, the human CDR-grafted antibody interacts with the amino acid residues involved in direct binding to the antigen and the amino acid residues of the CDR in the amino acid sequence of the FRs of VH and VL of the human antibody.
- the modification of FR amino acid residues of VH and VL of a human antibody can be achieved by performing the PCR method described in 2 (4) above using synthetic DNA for modification.
- the nucleotide sequence of the amplified product after P is determined by the method described in 2 (2) above, and it is confirmed that the desired modification has been performed.
- the human CDR graft constructed in 2 (4) and (5) above the gene encoding CH and CL of the human antibody of the humanized antibody expression vector described in 2 (1) above.
- the cDNAs encoding the VH and VL of the antibody can be cloned to construct a human CDIi-grafted antibody expression vector.
- the humanized antibody expression vector described in 2 (1) above is cloned so that it can be expressed in an appropriate form upstream of the genes encoding CH and CL of the human antibody. can do.
- the humanized antibody expression vectors described in 132 (3) and (6) above, or an expression vector obtained by modifying them were Can be used to effect transient expression of a humanized antibody.
- the host cell into which the expression vector is introduced any cell can be used as long as it can express a humanized antibody.
- ATCC CRL1651 is commonly used (Methods in Nucleic Acids Research, CRC press, 283, 1991).
- Methods for introducing the expression vector into COS-7 cells include the DEAE-dextran method (Methods in Nucleic Acids Research, CRC press, 283, 1991) and the Lipofection method (Proceedings of the National Academy of Sciences of the United States). of America, 84> 7413, 1987 After introduction of the expression vector, the expression level and antigen-binding activity of the humanized antibody in the culture supernatant were measured by ELISA (Antibodies: A Laboratory Manual, Cold Spring Harbor Laboratory, Chapter 14, 1988; Monoclonal Antibodies). : Principles and Practice, Academic Press Limited, 1996).
- a transformed cell stably expressing the humanized antibody By introducing the humanized antibody expression vector described in 2 (3) and (6) above into a suitable host cell, a transformed cell stably expressing the humanized antibody can be obtained.
- an electroporation method 1 As a method for introducing an expression vector into a host cell, an electroporation method 1 (Cytotechnology, 3, 133-140, 1990).
- any host cell that can express the humanized antibody can be used.
- mouse SP2 / 0-Agl4 cells ATCG CRL1581
- YB2 / 3HL .P2. G11.16Ag.20 cells (ATCC GRL1662, hereinafter referred to as YB2 / 0 cells). '
- the transformant that stably expresses the humanized antibody can be used for animal cell culture containing a drug such as G418 sulfate (hereinafter referred to as G418) according to the method disclosed in Japanese Patent Application Laid-Open No. 2-257891. It can be selected by culturing in a medium.
- Animal cell culture media include RPMI1640 medium (Nissui Pharmaceutical), GIT medium (Nippon Pharmaceutical), EX-CELL302 medium (JRH), IMDM (GIBC0 BRL), Hybridoma-SFM
- the humanized antibody can be expressed and accumulated in the culture supernatant by culturing the obtained transformed cells in a medium.
- the expression level of the humanized antibody and the antigen-binding activity 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 Japanese Patent Application Laid-Open No. 2-257891.
- the humanized antibody can be purified from the culture supernatant of the transformed cells using a protein A column (Antibodies: A Laboratory Manual, 'Cold Spring Harbor Laboratory, Chapter 8, 1988; Monoclonal Antibodies: Principles and Practice, Academic Press Limited, 1996).
- a protein A column Antibodies: A Laboratory Manual, 'Cold Spring Harbor Laboratory, Chapter 8, 1988; Monoclonal Antibodies: Principles and Practice, Academic Press Limited, 1996.
- other purification methods usually used for protein purification can be used.
- purification can be performed by a combination of gel filtration, ion exchange chromatography, and ultrafiltration.
- Antibody fragments can be prepared by genetic engineering techniques or protein chemical techniques based on the anti-hIGF antibodies described in 1 and 2 above.
- Examples of the genetic engineering method include a method of constructing a gene encoding a desired antibody fragment, and expressing and purifying the gene using an appropriate host such as animal cells, plant cells, insect cells, and Escherichia coli.
- protein chemistry techniques include site-specific cleavage and purification using proteolytic enzymes such as pepsin and papain.
- Antibody fragment Fab, F (ab ') 2, Fab' s scFv, diabody, dsFv, a peptide comprising CDR, and the like.
- Fab can be produced proteinatically by treating IgG with proteolytic enzyme papain. After papain treatment, if the original antibody is an IgG subclass that has protein A binding properties, it can be separated from IgG molecules and Fc fragments by passing it through a protein A column and recovered as a uniform Fab. (Monoclonal Antibodies: Principles and Practice, third edition, 1995). In the case of IgG subclass antibodies that do not have protein A binding, Fab can be recovered in fractions eluted at low salt concentration by ion exchange chromatography.
- Fabs can be produced by genetic engineering, mostly using Escherichia coli, or using insect cells or animal cells. For example, the DNA encoding the V region of the antibody described in 2 (2), 2 (4) and 2 (5) above is cloned into a Fab expression vector. Roning can be performed to produce a Fab expression vector. Any Fab expression vector can be used as long as it can incorporate and express the DNA encoding Fab. An example is PIT106 (Science, 240, 1041, 1988). The Fab expression vector can be introduced into an appropriate E. coli to produce and accumulate Fab in an inclusion body or periplasm.
- an active Fab can be obtained by a refolding method usually used for proteins, and when expressed in a periplasm, the active Fab leaks into the culture supernatant.
- a uniform Fab can be purified by using an antigen-bound column (Antibody Engineering, A Practical Guide, WH Freeman and Company, 1992).
- F (ab ') 2 can be produced proteinically by treating IgG with the protease pepsin. After treatment with pepsin, it can be recovered as uniform F (ab ') 2 by the same purification procedure as Fab (Monoclonal Antibodies: Principles and Practice, third edition, Academic Press, 1995).
- Fab 'described in 3 (3) below is treated with a maleimide such as o-PDM or bismaleimide hexane to form a thioether bond, or DTNB [5, 5'-dithiobis (2- nitrobenzo.ic acid)] and SS bond (Antibody Engineering, A Practical Approach, IRL PRESS, 1996).
- Fab ′ can be obtained by treating F (ab ′) 2 described in 3 (2) above with a reducing agent such as dithiothreitol.
- Fab ′ can be produced by genetic engineering, mostly using Escherichia coli, or insect cells or animal cells.
- the DNA encoding the V region of the antibody described in 2 (2), 2 (4) and 2 (5) is cloned into a Fab ′ expression vector, and the Fab ′ expression vector is cloned.
- DNA encoding Fab' can be incorporated and expressed. Any one can be used as long as For example, a Fab 'expression vector can be introduced into an appropriate E.
- active Fab's can be obtained by the refolding method usually used for proteins, and when expressed in periplasm, partial digestion with lysozyme, osmotic shock, sonication, etc. After refolding, which can crush the bacteria by the above treatment and allow the bacteria to be recovered outside the cells, or from the crushed solution of the bacteria, a uniform Fab can be purified by using a protein G column or the like. (Antibody Engineering, A Practical Approach, IRL PRESS, 1996).
- ScFv can be produced by genetic engineering using phage or Escherichia coli, or insect cells or animal cells. For example, 2 (2), 2 (4) and 2 above
- the DNA encoding the V region of the antibody described in (5) can be cloned into a scFv expression vector to prepare a scFv expression vector.
- Any scFv expression vector can be used as long as it can incorporate and express DNA encoding scFv.
- pCANTAB5E Amersham-Pharmacia
- pHFA pHFA
- scFv expression vector By introducing the scFv expression vector into an appropriate Escherichia coli and infecting a helper phage, a phage in which the scFv is expressed on the phage surface in a form fused with the phage surface protein can be obtained.
- an active scFv can be obtained by the refolding method usually used for proteins, and when expressed in periplasm, lysozyme can be obtained. Bacteria can be crushed by partial digestion, osmotic shock, sonication, etc., and recovered outside the cells. After the refolding, uniform scFv can be purified from the lysate of the fungi by using cation exchange chromatography (Antibody Engineering, A Practical Approach, IRL PRESS, 1996).
- a diabody can be produced using E. coli, insect cells, animal cells, and the like, in many cases, in genetic engineering. For example, DNA obtained by linking VH and VL of the antibodies described in 2 (2), 2 (4) and .2 (5) above so that the number of amino acid residues encoded by the linker is 8 or less. It can be prepared and cloned into a diabody expression vector to produce a diabody expression vector. Any diabody expression vector can be used as long as it can incorporate and express diabody-encoding DNA. For example, pCANTAB5E (manufactured by Amersham Pharmacia), pHFA (Human Antibodies Hybridomas, 5, 48, 1994) and the like can be mentioned.
- the diabody can be produced and accumulated in the inclusion body or periplasm of Escherichia coli into which the diabody expression vector has been introduced. From the inclusion body, an active diabody can be obtained by the refolding method usually used for proteins, and when expressed in the periplasm, partial digestion by lysozyme, osmotic shock, sonication, etc. Bacteria can be crushed by treatment with shion, etc., and collected outside the cells. From fracture ⁇ after the refolding or bacteria, by using such a cation exchange chromatograph I one, can be purified homogeneous scFv (Antibody Engineering, A Practical Approach , IRL PRESS, 1996) 0
- dsFv can be prepared using Escherichia coli, insect cells or animal cells. First, a mutation was introduced at an appropriate position in the DNA encoding VH and VL of the antibody described in 2 (2), 2 (4), and 2 (5) above, and the amino acid residue encoded was replaced with cysteine. Make DNA. Each of the prepared DNAs can be cloned into a dsFv expression vector to prepare VH and VL expression vectors. As the vector for expressing dsFv, any vector can be used as long as it can incorporate and express DNA encoding dsFv. An example is pULI9 (Protein Engineering, 7, 697, 1994). VH and VL expression vectors are introduced into appropriate E.
- VH and VL polypeptides can be obtained from inclusion bodies or veliplasm, mixed, and converted into active dsFv by the refolding method usually used for proteins. After refolding, it can be further purified by ion exchange chromatography and gel filtration (Protein Engineering, 697, 1994).
- the peptide containing the CDR can be prepared by a chemical synthesis method such as the Fnioc method or the tBoc method. Also, a DNA encoding a peptide containing CDR can be prepared, and the prepared DNA can be cloned into an appropriate expression vector to prepare a CDR peptide expression vector. Any expression vector can be used as long as it can incorporate and express the DNA encoding the CDR peptide. For example, pLEX (manufactured by Invitrogen), pAX4a + (manufactured by Invitrogen) and the like can be mentioned.
- the expression vector can be introduced into an appropriate Escherichia coli to produce and accumulate CDR 'peptide in an inclusion body or periplasm.
- CDR peptides can be obtained from inclusion bodies or periplasm and purified by ion exchange chromatography and gel filtration (Prot in Engineering, 7, 697, 1994). '3. Method for evaluating the activity of humanized antibody or antibody
- the binding activity of the humanized anti-hlGF antibody in the culture supernatant or the purified hlGF antibody to hlGF can be measured by ELISA, Biosensor-Biacore, or the like.
- the antibody of the present invention that inhibits the function of hlGF can be measured. '' (1) Activity evaluation by ELISA
- Binding ELISA refers to immobilizing an antigen on a 96-well ELISA plate, reacting it as a primary antibody, and reacting with a labeled secondary antibody capable of recognizing the primary antibody to detect a labeled substance.
- antigens to be immobilized include purified proteins and parts of hIGF-I and hlGF-II. And peptides having different sequences.
- the first antibody include a measurement target such as a culture supernatant such as a hybridoma or a purified antibody.
- Examples of the second antibody include antibodies obtained by labeling an antibody capable of recognizing the first antibody with biotin, an enzyme, a chemiluminescent substance, or a radioisotope.
- an antibody capable of recognizing the first antibody with biotin, an enzyme, a chemiluminescent substance, or a radioisotope.
- the West Wa rust pel O Kishida one peptidase labeled anti Radzutoimu 'Noguropurin hereinafter referred to as r lg
- mouse antibody the West Wa rust pel O Kishida one peptidase labeled anti Radzutoimu 'Noguropurin
- hIGF-I or hIGF-II is immobilized on an ELISA plate in advance, and the antibody to be measured and hIGF-I or hlGF-II are simultaneously added and reacted.
- a method of measuring the inhibition of the reaction between the antigen immobilized on the plate and the antibody to be reacted by another or the same antigen added to the reaction solution by measuring the change in the amount of the primary antibody bound to the plate. is there. Changes in the amount of antibody binding are detected by a secondary antibody to the antibody.
- the reactivity with natural hIGF and antigen epitope can be analyzed by competitive ELISA using natural hIGF and a partial peptide of hIGF. Whether or not the antibody recognizes the three-dimensional structure of hIGF can be determined by a conventional structural analysis method. Examples of the structural analysis method include X-ray crystallography and nuclear magnetic resonance.
- the measurement using the Wosensor “Biacore” is a technique that detects a small change in mass that occurs on the sensor-chip surface due to the binding and dissociation between two molecules, as an SPR signal by an optical phenomenon. It is derived from the measurement by this method.
- binding rate constant hereinafter referred to as Kass
- Kdiss dissociation rate constant
- K a K a
- K a Kass / Kdiss
- the amount of the ligand immobilized on the sensor chip is preferably in a range between the minimum value calculated by Equation 1 and the maximum value calculated by Equation 2. Further, the amount of binding of the analyte is Maximum join calculated by Equation 3 Less is preferable.
- Formula 1, Formula 2 and Formula 3 In the above, a ligand indicates a molecule to be immobilized on a sensor chip, an analyte indicates a molecule to be added via a channel system, and S indicates the number of binding sites of the ligand.
- the binding constant according to the protein binding mode can be analyzed by setting the flow rate and washing conditions so that the maximum binding amount can be maintained.
- RU 200 X 1 / S X (molecular weight of ligand / molecular weight of analyte)
- Maximum binding amount molecular weight of analyte X amount of immobilized ligand (RU) / molecular weight of ligand 'X S,
- the anti-hIGF antibody and the antibody fragment thereof of the present invention specifically bind to hIGF-I and hIGF-II with the same strength, and inhibit the function thereof, so that hIGF-mediated diseases and abnormal It is considered to be useful for treating diseases in which the disease state progresses due to increased production of hIGF.
- humanized antibodies have a portion derived from the amino acid sequence of human antibodies compared to antibodies of non-human animals, so they do not show immunogenicity in the human body, and can be administered repeatedly, and The effect is expected to last for a long time.
- HiGF-mediated diseases and diseases in which the disease state progresses due to abnormally increased production of hiGF include cancer, acromegaly, and diabetic complications.
- the anti-hIGF antibody and the antibody fragment thereof of the present invention can be administered alone, they are usually mixed together with one or more pharmacologically acceptable carriers to obtain a pharmaceutical technology. It is desirable to provide it as a pharmaceutical preparation manufactured by any method well known in the art. ' It is desirable to use the most effective route for treatment, including oral administration or non-oral administration such as buccal, respiratory, rectal, subcutaneous, intramuscular and intravenous administration. In the case of protein or peptide preparations, desirably, intravenous administration can be mentioned.
- anti-hIGF antibody and the antibody fragment thereof of the present invention can be administered alone, they are usually mixed together with one or more pharmacologically acceptable carriers to obtain a pharmaceutical technology. It is desirable to provide it as a pharmaceutical preparation manufactured by any method well known in the art.
- Dosage forms include sprays, capsules, tablets, granules, syrups, emulsions, suppositories, injections, ointments, tapes and the like.
- Formulations suitable for oral administration include emulsions, syrups, capsules, tablets, powders, granules and the like.
- Liquid preparations, such as emulsions and syrups include water, sugars such as sucrose, sorbitol, fructose, glycols such as polyethylene glycol and propylene glycol, oils such as sesame oil, olive oil, soybean oil and the like. And preservatives such as P-hydroxybenzoic acid esters, and flavors such as strawberry flavor and peppermint as additives.
- Capsules, tablets, powders, granules, etc. are excipients such as lactose, glucose, sucrose, mannitol, disintegrants such as starch and sodium alginate, lubricants such as magnesium stearate, talc, polyvinyl alcohol It can be produced using additives such as binders such as hydroxypropylcellulose and gelatin, surfactants such as fatty acid esters, and plasticizers such as glycerin.
- Formulations suitable 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 carriers such as cocoa butter, hydrogenated fats or carboxylic acids o
- the propellant may be the antibody or antibody fragment itself or the oral cavity of the recipient. It is prepared using a carrier or the like which does not irritate the respiratory tract mucosa and disperses the antibodies and antibody fragments as fine particles to facilitate absorption.
- the carrier include lactose and glycerin.
- Formulations such as aerosols and dry powders can be made depending on the properties of the antibody and antibody fragment and the carrier used.
- the components exemplified as additives can be added by using a pill. '
- the dose or frequency of administration varies depending on the desired therapeutic effect, administration method, treatment period, age, body weight, etc., but is usually 10 g / to 10 mg / kg per day for an adult.
- the present invention will be described with reference to examples, but the present invention is not limited thereto.
- amino acid sequence of VH of an anti-hIGFCDR-grafted antibody consisting of antibody FR different from Cam was designed as follows.
- VHs of various known human antibodies into three subgroups (HSG ⁇ to ⁇ ⁇ ) based on their amino acid sequence homology, and reported the consensus sequence of each subgroup ( Sequences of Proteins of Immunological Interest, US Dept. Health and Human Services, 1991). Since an antibody having such a consensus sequence is expected to have low immunogenicity in humans, the amino acid sequence of VH of anti-hIGFCDR-grafted antibody was designed based on the FR of this consensus sequence.
- the amino acid sequence of the VH CDR of the anti-hlGF rat monoclonal antibody KM1468 is located at the appropriate position in the amino acid sequence of FR of the consensus sequence of subgroup III of human antibody VH.
- the VH amino acid sequence HV0 (3) of the anti-hIGFCDR-grafted antibody described in SEQ ID NO: 5 was designed.
- amino acid sequence of VL of the anti-hi GFCDR-grafted antibody was designed as follows.
- the amino acid sequence of FR of human antibody VL for transplanting the amino acid sequence of CDR of VL (SEQ ID NO: 4) of anti-hlGF rat monoclonal antibody thigh 18 determined in 1 of Reference Example 5 is shown below. Was selected as follows.
- the amino acid sequence of CDR of VL of monoclonal antibody KM1468 was grafted, and amino acid sequence LV0 of VL of anti-hIGFCDR-grafted antibody described in SEQ ID NO: 14 was designed.
- the second homologous human antibody VL was subgroup I. Then, the amino acid sequence of the VL CDR of the anti-hIGF rat monoclonal antibody KM1468 was transplanted to an appropriate position in the amino acid sequence of FR of the consensus sequence of subgroup I, and the anti-hIGFCDR-grafted antibody described in SEQ ID NO: 55 was transplanted.
- the VL amino acid sequence LV0 (1) was designed.
- the VH amino acid sequences CamHVO and HV0 (3), and the VL amino acid sequences LV0 and LV0 (1) of the anti-hi GFCDR-grafted antibody designed above were added to the FR amino acid sequence of the selected human antibody by anti-hIGF rat monoclonal.
- VH having an amino acid sequence of CamHVO and VL having an amino acid sequence of LV0 are referred to as CamHVO / LVO, etc .; CamHV0 / LV0, CamHVO / LVO (1), HV0 (3) LV0 and HV0 (3) LV0 (1). ]
- the three-dimensional structure of the V region was constructed using computer modeling techniques.
- the software AbM (manufactured by Oxford Molecular) is used for preparing three-dimensional structure coordinates, and the software Pro-Explore (manufactured by Oxford Molecular), RasMol (manufactured by Glaxo) or yiewer Lite (manufactured by Accelrys In) is used for displaying three-dimensional structure ) In accordance with the attached instruction manual.
- Pro-Explore manufactured by Oxford Molecular
- RasMol manufactured by Glaxo
- yiewer Lite manufactured by Accelrys In
- a combination i-Yuichi model of the three-dimensional structure of the V region of the anti-hlGF rat monoclonal antibody KM1468 was constructed.
- the amino acid residues of FR in the V region of the variant were changed, and the residues considered to affect the binding activity of the antibody to the antigen were identified as CamHVO. So we chose the first Gln, the 97th Ala, and the 98th Arg. Furthermore, although the effect on the activity of the antibody was not clear from the three-dimensional structural model, the amino acid at position 42 is generally Gly, whereas the anti-hlGF rat monoclonal antibody KM1468 has a Thr Yes, it was considered that this amino acid residue may play a specific role in the anti-hlGF rat monoclonal antibody KMU68, so this residue was also selected as a candidate for modification.
- a human CDR-grafted antibody having various modifications, wherein at least one of the amino acid residues thus selected is modified to an amino residue in the amino acid sequence of the V region of the anti-hIGF rat monoclonal antibody KM1468.
- VH and VL amino acid sequences were designed.
- the cDNA encoding the amino acid sequence CamHVO designed in Example 1 (1) was constructed as follows.
- the secretion signal sequence of the H chain of the anti-hIGF rat monoclonal antibody KM14.68 corresponding to the amino acid sequence of the 1st to 19th amino acids of SEQ ID NO: 2 was linked to the N-terminal of the designed amino acid sequence. The sequence is shown in SEQ ID NO: 12.
- the amino acid sequence was converted to a gene codon. If there are multiple gene codons for one amino acid residue, consider the frequency of use found in the nucleotide sequence of the antibody gene (Sequences of Proteins of Immunological Interest, US Dept. 'Health and Human Services, 1991) did.
- the nucleotide sequence of the cDNA encoding the amino acid sequence was designed and shown in SEQ ID NO: 13. 5 3 and 3 'ends of the base sequence, the binding nucleotide sequence of the amplification primers during PCR reactions containing restriction enzyme recognition sequences for cloning into a humanized antibody expression vector one and it it added, CamHVO Is the base sequence to be coded.
- the salt group sequence is divided into 3-terminal about 150 bases each in total of 4 nucleotide sequences (adjoining nucleotide sequences are designed to have a overlapping sequence of about 20 bases at its end), they sense strand ,
- the sequence of alternating antisense strands Four synthetic oligo DNAs (manufactured by Fasmac) represented by column numbers 30, 31, 32 and 33 were synthesized.
- Each synthetic oligo DNA was added to the reaction solution attached to KOD-plus polymerase (manufactured by T0Y0B0) to a final concentration of 0.1 M, and further, a 0.4 ZM T3 primer (manufactured by Takara Bio) and a 0.4 M T7 primer (manufactured by Takara Bio).
- a PCR reaction was performed using Takara Bio) and one unit of K0D-plus polymerase (T0Y0B0) to make a total of 50 L.
- the reaction conditions were 94 ° C for 30 seconds, 60 ° C for 30 seconds, and 72 ° C for 60 seconds in 35 cycles.
- the reaction solution was fractionated by 1.5% agarose electrophoresis, and a gene fragment of about 0.5 kbp was recovered using a gel extraction kit (manufactured by QIAGEN).
- a gene fragment of about 0.5 kbp was recovered using a gel extraction kit (manufactured by QIAGEN).
- the reaction solution was fractionated by 1.5% agarose electrophoresis, and The treated gene fragment was recovered using a gel extraction kit (QIAGEN).
- pBluescript II 'SK (-) (hereinafter referred to as pBS) (Stratagene) was digested with restriction enzymes RI (Takara Bio) and 1 (Takara Bio) in the same manner as the gene fragment. After performing a digestion reaction, fractionation and collection were performed, and a ligation reaction between pBS 'and the CamHVQ gene fragment was performed using Ligation high (manufactured by T0Y0B0) according to the attached instruction manual.
- Escherichia coli DH5 ⁇ strain was transformed using the recombinant plasmid DNA solution obtained by the ligation reaction, and plasmid DNA was prepared from the transformant using miniprep (manufactured by QIAGEN) according to the attached instructions.
- the nucleotide sequence was analyzed using the Terminator Cycle Sequencing FS Ready Reaction Kit ver.3 (Applied Biosystems), and the plasmid pBS / CamHVO shown in Fig. 1 including the nucleotide sequence encoding the target amino acid sequence CamHVO was analyzed. I got it.
- the construction of a cDNA encoding a VH variant of the anti-hIGFCDR-grafted antibody designed in Example 1 (1) was performed as follows.
- the gene codon of the amino acid residue after modification is the gene codon found in anti-hIGF rat monoclonal antibody KM1468 Went like so.
- the PGR reaction was carried out using Leak-plus polymerase (manufactured by T0Y0B0) according to the attached instructions.
- Synthetic oligo DNA used below was manufactured by Pharmaceuticals.
- Example 1 (2) Using pBS / CamHVO obtained in Example 1 (2) as a type I, a synthetic oligo DNA represented by SEQ ID NO: 38 and a synthetic oligo DNA represented by SEQ ID NO: 41 at 94 ° C for 30 seconds, The PCR reaction was carried out under the conditions of 35 cycles of a cycle of 58 ° C for 45 seconds and a cycle of 72 ° C for 60 seconds. After the reaction, the reaction solution is fractionated and collected from the reaction solution by 1.5% agarose electrophoresis in the same manner as in Example 1 (2), and the collected gene fragment is grown on pBS to obtain the desired amino acid fragment. A plasmid pBS / QAR containing the cDNA shown in SEQ ID NO: 17 encoding the sequence QAR was obtained.
- a synthetic oligo DNA represented by SEQ ID NO: 38 and a synthetic oligo DNA represented by SEQ ID NO: 39 a 5′-QG gene fragment of about 250 bp
- a synthetic oligo DNA represented by SEQ ID NO: 40 and a synthetic oligo DNA represented by SEQ ID NO: 41 a 3′-GAR gene fragment of about 250 bp was prepared in the same manner as in (3-1) above. After amplification by PCR, the target gene fragment was fractionated and recovered by 1.5% agarose electrophoresis.
- Example 1 (1) CDNA encoding the amino acid sequence LV0 designed in Example 1 (1) was constructed as follows.
- an L-chain secretion signal sequence of anti-hIGF rat monoclonal mononal antibody KM1468 corresponding to the amino acid sequence from the 1st to 22nd amino acid sequence of SEQ ID NO: 4 was linked to the N-terminal of the designed amino acid sequence. The sequence is shown in SEQ ID NO: 15 '.
- the amino acid sequence was converted to a gene codon. If multiple gene codons exist for one amino acid residue, consider the frequency of use found in the nucleotide sequence of the antibody gene (Sequences of Proteins of Immunological Interest, US Dept. Health and Human Services, '1991) did.
- the nucleotide sequence of cDNA encoding the amino acid sequence was designed and is shown in SEQ ID NO: 16.
- the 5'-end and the 3'-end of the nucleotide sequence were added with the binding nucleotide sequence of an amplification primer for PCR reaction containing a restriction enzyme recognition sequence for cloning into a humanized antibody expression vector.
- the designed base sequence is divided into a total of four base sequences of about 150 bases each from the 5 'end (adjacent base sequences should have an overlapping sequence of about 20 bases at the end), and these are sent.
- four synthetic oligo DNAs represented by SEQ ID NOs: 34, 35, 36 and 37 were synthesized in the alternate order of the DNA strand and the antisense strand.
- the cDNA encoding the amino acid sequence of the VL variant of the anti-hIGFCDR-grafted antibody designed in Example 1 (1) was constructed as follows. Amino acid residue gene after modification Codons were adjusted to be the gene codons found in the anti-hIGF late monoclonal antibody KMU68. The PCR reaction was carried out using K0D-plus polymerase (manufactured by T0Y0B0) according to the attached instructions.
- the base sequence of the cDNA shown in SEQ ID NO: 19, which encodes the sequence Al1, is divided into a total of four base sequences of about 150 bases from the 5 'end (adjacent bases have about 20 bases at the end). (Duplicate sequence), and synthesize them in the order of sense strand and antisense strand to synthesize synthetic oligo DNAs represented by SEQ ID NOs: 46, 47, 48 and 49. did.
- a synthetic oligo DNA represented by SEQ ID NO: 42 and a synthetic oligo DNA represented by SEQ ID NO: 50 were used to generate 5, -PLL genes.
- the synthetic oligo DNA represented by SEQ ID NO: 44 and the synthetic oligo DNA represented by SEQ ID NO: 49 the 3′-VV gene fragment was subjected to PCR in the same manner as in (3-1) above. The reaction was performed. After the reaction, the reaction solution was subjected to 1.5% agarose gel electrophoresis to fractionate and collect the target gene fragment in the same manner as in Example 1 (2). Recovered gene fragments, T3 primer located at the 5 'end of 5'-PLL gene fragment
- NPLLVV modified navel
- Example 1 (4) Using pBS / LVO obtained in Example 1 (4) as type III, using the synthetic oligo DNA represented by SEQ ID NO: 42 and the synthetic oligo DNA represented by SEQ ID NO: 43, PCR reaction was carried out in the same manner as in Example 1 to amplify the NPLL gene fragment, and in the same manner as in Example 1 (2), the target gene fragment was fractionated and recovered by 1.5% agarose gel electrophoresis.
- a PCR reaction was performed in the same manner as in (3-1) above to amplify the 5'-NPLL gene fragment, and Example 1 (2) The reaction solution was subjected to 1.5% agarose gel electrophoresis to fractionate and collect the target gene fragment.
- the 5'-PL gene fragment, 3'-DFT gene fragment, M13RV primer (Takara Bio) and M13M20 primer (Takara Bio) were used to perform pBS
- the operation up to cloning was performed to obtain a plasmid pBS / PLDFT containing the cDNA shown in SEQ ID NO: 24, encoding the target amino acid sequence PLDFT shown in SEQ ID NO: 28.
- the plasmid pKANTEX93 / CamHV0, pKANTEX93 / QAR, and PKANTEX93 / QGAR were obtained by ligating PKANTEX93 with the gene fragment encoding the amino acid sequence CamHV0, QAR and QGAR3 ⁇ 4 using T0Y0B0 (manufactured by T0Y0B0).
- the cDNAs encoding the amino acid sequences LV0, NYPLL3A1K PLDFT and PLLDF, and the pKANTEX93 / CamHV0, pKANTEX93 / QAR and PKANTEX93 / QGAR obtained above were respectively restricted with restriction enzymes I ⁇ RI and WI.
- gene fragments of about 0.5 kbp and 12.5 kbp were separated by electrophoresis on a 0.5% agarose gel, and recovered using a gel extraction kit (QIAGEN). Ligation high
- Escherichia coli DH5 ft strain is transformed using the recombinant plasmid DNA solution obtained by the ligation reaction, and miniprep (QIAGEN) is used from the transformed strain.
- miniprep QIAGEN
- H-SFM (5) containing 50 nM of methotrexet (hereinafter, referred to as MTX; SIGMA), which is an inhibitor of the gene product dihydrofolate reductase (hereinafter, referred to as DHFR), contains 1 to 2 X 10
- MTX methotrexet
- SIGMA which is an inhibitor of the gene product dihydrofolate reductase
- the concentration of the anti-hIGFCDR-grafted antibody in the culture supernatant was determined according to the human IgG quantitative ELISA described in Example 2 (5), and the antibody expression level was confirmed.
- the MTX concentration was sequentially increased to 100 nM and 200 nM in the same manner as described above, and finally G418 was increased to 0.5 mg / g.
- a transformant capable of growing on H-SFM (5) containing mL and MTX at a concentration of 200 nM and highly expressing the anti-hIGFCDR-grafted antibody was obtained.
- the human IgG contained in the culture supernatant of the transformant was quantified by the human IgG quantification EUSA described in Example 2 (5), and the MTX-resistant transformant having the highest expression level of the anti-hIGFCDR-grafted antibody was determined.
- MTX resistant transformants may be used for single cells by limiting dilution once or twice as needed.
- each anti-hi GFCDR-grafted antibody is combined with the amino acid sequence of each V region, and the anti-hlGFCDR-grafted antibody produced from the transformant into which the plasmid pKANTEX93 / CamHV0 / LV0 has been introduced is called CamHVO / LVO,
- An anti-hlGFCDR-grafted antibody produced from a transformant into which plasmid pKANTEX93 / QAR / LV0 has been introduced and an anti-hlGFCDR-grafted antibody produced from a transformant into which plasmid PKANTEX93 / QGAR / LV0 has been introduced such as QAR / LV0.
- hIGF-I Flujisawa Pharmaceutical Co., Ltd.
- methylated BSA SIGMA Co., Ltd.
- mBSA-hlGF-1 A conjugate of BSA and hIGF-1 was obtained (hereinafter referred to as mBSA-hlGF-1).
- mBSA-hIGF-1 is dispensed into a 96-well EUSA plate (manufactured by Greiner) at a concentration of 20 ng / mL at 50 ⁇ L / ⁇ ⁇ at a concentration of hIGF-1 and left at 4 ° C overnight for adsorption. I let it. After washing with PBS, PBS containing 1% BSA (hereinafter referred to as BSA-PBS) was added at 100 zL / well, and reacted at room temperature for 1 hour to block remaining active groups.
- BSA-PBS PBS containing 1% BSA
- Tween-PBS PBS containing 0.05% Tween 20
- HRP-labeled anti-human IgG antibody American Qualex
- Anti-human IgG antibody (American Qualex) is diluted 2000-fold with PBS to a 96-well ELISA plate (Greiner), dispensed at 50 zL / ⁇ ⁇ , and left overnight at 4 ° C for adsorption. A plate was made. The operation after blocking the remaining active groups using BSA-PBS was performed in the same manner as in the binding ELISA described in Example 2 (4) above.
- Example 2 Based on the purified anti-hIGFCDR-grafted antibodies obtained in Example 2 (3), the binding ELISA described in Example 2 (4) or the ELISA described in Example 3 (2) described below was used.
- the binding activity to hIGF was examined using a method for measuring the binding affinity to hIGF using Biosensor Biacore (manufactured by Biacore).
- Biosensor Biacore manufactured by Biacore.
- the binding activity of various anti-hIGFCDR-grafted antibodies purified by the method described in Example 2 (3) to mBSA-IGF- ⁇ was examined.
- the results are shown in FIG.
- the anti-hIGFDR monoclonal antibody CamHVO / LVO obtained by grafting only the CDR of the anti-hIGF rat monoclonal antibody 1468 to the FR of the human antibody Cam and FR of the common sequence of subgroup IV of the VL subgroup IV was
- the binding activity to hIGF-I was reduced to about 1/50 as compared with the anti-hlGF human chimeric antibody KM3002. Therefore, an increase in hIGF-1 binding activity was examined by modifying the amino acid of each FR.
- Anti-hIGFCDR-grafted antibody QA / LV0 which is modified from CamHVO / LVO to Glu, the first Gin of VH to Glu, the 97th Ala to Thr, and the 98th Arg to Thr, respectively.
- the anti-hIGFCDR-grafted antibody QGAR / LV0 in which the first Gin was changed to Glu, the 97th Ala was changed to Thr, and the 98th Arg was changed to Thr, and the 42nd Gly was changed to Thr
- the binding activity was increased about 25-fold compared to CamHVO / LVO, and the activity was about 1/2 of the binding activity of the anti-hIGF human chimeric antibody KM3002. .
- the first Gin of CamHVO was changed to Glu, the 97th Ala to Thr, the 98th Arg to Thr, and the 42nd Gly to Thr. It is possible to increase the binding activity to hIGF-1. The contribution to activity was not known in the three-dimensional structural model. The 42nd Gly plays a very important role in the activity of this antibody. It became clear that there was.
- the anti-hIGFCDR-grafted antibody CamHVO / LVO converts the 22nd Asn of the VL to Thr, the 35th Tyr to Phe, the 42nd Pro to Ser, and the 45th Leu to Pro , 46th Leu to Trp, 69th Asp. Ser, 70th Phe to Tyr, 71st Thr to Ser, 82th Val to Ala, 84th Val
- an amino acid sequence with a small number of modified amino acid residues was identified by PLDFT.
- the binding activity to hIGF-I was examined.
- Biacore2000 (manufactured by Biacore).
- the binding activity of the anti-hlGF human chimeric antibody KM3002 and the various anti-hlGFCDR-grafted antibodies purified in Example 2 ( (3) above to hIGF-I or hlGF-II) was determined using a biosensor.
- the binding affinity was determined as follows using HBS-EP (10 mM HEPES, 150 mM NaCU 3 mM EDTA, 0.005% Tween20 pH 7.4). ) (Biacore).
- the reaction was performed at 25 ° C.
- the binding rate constant Kass and the dissociation rate constant Kdiss were calculated from the reaction curve at each concentration, and the binding constant K A (M- 1 ) of each antibody was calculated from this.
- the results are shown in Table 3. ,
- Anti hi GFCDR grafted antibody CamHVO / LVO is compared with the anti-hIGF human chimeric antibody thigh 3002, K A for hIGF-I or hIGF-II, but it it about 1/17, was reduced to about 1/6.
- the anti-MGFCDR-grafted antibody QAR / LVO showed almost no increase in binding affinity compared to the anti-hlGFCDR-grafted antibody CamHVO / LVO, but the anti-hlGFCDR-grafted antibody QGAR / LV0 showed a higher K value for hIGF-I and hIGF-II.
- VL against hIGF-I or hIGF-II was increased by about 8 times and about 5 times compared to anti-hlGFCDR'-implanted antibody CamHVO / LVO by VL anti-hlGFCDR-implanted antibody CamHV0 / NYPLL3All, respectively.
- the K A against hIGF- ⁇ or hlGF-II was increased about 14 times and about 10-fold, respectively, compared to the anti-hlGFCDR-grafted antibody CamHVO / LVO. .
- the binding affinity for hIGF-II was almost the same as that of the anti-hlGFCDR-grafted antibody QGAR / NYPLL3A11 and the anti-hIGF human chimeric antibody KM3002, and no reduction in activity due to the decrease in the number of modified amino acid residues was observed.
- Human colon cancer cell line HT-29 (ATCC HTB-38) was added to TF / BSA medium [D-MEM / F-12 (Gibco BRL)] at 10 ⁇ g / mL human transferrin (Gibco BRL), 200 ⁇ g / mL.
- Medium supplied with ⁇ g / mL BSA to give 5 ⁇ 10 4 cells / mL, and dispensed into a 96-well culture plate at 100 ⁇ L / well.
- hIGF-I or hIGF-II diluted to a concentration of 40 to 80 ng / mL in TF / BSA medium was added at 50 L / well, and each anti-hlGFCDR-grafted antibody diluted to each concentration in TF / BSA medium was added at 50 ⁇ L / well.
- was added at L / Ueru were cultured for 5 days at 37 ° C ;, 5% C0 2 incubator base Isseki within one.
- OD450 thigh absorbance was measured using a plate reader one Emax (Molecular Devices Co., Ltd.) (hereinafter referred to as OD450).
- an anti-hIGFCDR-grafted antibody having a high binding affinity for hIGF has a high inhibitory activity against hIGF-dependent proliferation, and among the produced anti-hIGFCDR-grafted antibodies, the anti-hIGFCDR-grafted antibodies QGA / NYPLL3A11, The hIGFCDR-grafted antibody QGAR / PLDFT and the anti-hIGFCDR-grafted antibody QGAR / PLLDFT were shown to have the same
- Blood was collected from the fundus venous plexus, and the antibody titer in the serum was examined by the binding ELISA described in Reference Example 1 (4).
- the spleen was extracted 3 days after the last immunization from the rat showing a sufficient antibody titer.
- the spleen is shredded in a MEM medium (manufactured by Nissui Pharmaceutical Co., Ltd.), loosened with forceps, centrifuged (1200 rpm, 5 minutes), the supernatant is discarded, and Tris'-ammonium chloride buffer (PH7.65 ) For 1 to 2 minutes to remove red blood cells, washed three times with MEM medium, and used for cell fusion.
- MEM medium manufactured by Nissui Pharmaceutical Co., Ltd.
- the 8-azaguanine-resistant mouse myeloma cell line P3-U1 was cultured in a normal medium, and 2 X or more cells were secured during cell fusion and used for cell fusion.
- Rat splenocytes obtained in section (1) and myeloma cells obtained in section (2) were mixed at a ratio of 10: 1, centrifuged (1200 rpm, 5 minutes), and the supernatant was collected. Discard and agitate the precipitated cells at 37 ° C with 1.0 x 10 2 x 0.2 mL of fusion medium per 2 splenocytes (2 g PEG-1000, 2 mL MEM, 0.7 mL Dimethylsulfoxide), and 1 to 2 mL of MEM medium was added several times every 1 to 2 minutes, and then MEM medium was further added to bring the total volume to 50 mL. After centrifugation (900 rpm, 5 minutes), discard the supernatant, loosen the cells gently, and add 100 mL of HAT medium ⁇ normal medium
- FCS fetal bovine serum
- the suspension was dispensed by 100 / L / Ueru the plate for 96 Ueru culture in 5% C0 2 Inkyube Yuichi, and cultured for 10 to 14 days at 37 ° C.
- the culture supernatant was reacted with methylated BSA-hlGF-1 using the binding ELISA described in Reference Example 1 (4), and then reacted with methylated BSA-BSA [BSA] as a negative control.
- BSA-BSA methylated BSA-BSA [BSA] as a negative control.
- the anti-hIGF rat monoclonal antibodies having the reactivity shown in FIG. We obtained 6 clones of hybridomas that produced the monoclonal KM1472 and anti-hIGF rat monoclonal KM1473, respectively. Subclasses of antibodies produced by each hybridoma were examined by ELISA using a subcluster typing kit. As a result, all were IgG2b. '
- methylated BSA-hlGF-1 prepared in Reference Example 1 (1) and methylated BSA-BSA as a negative control were used as the antigen immobilized on the ELISA plate.
- the above-mentioned antigen is dispensed at a concentration of 10 ⁇ g / mL at 50 zL / well on a 96-well ELISA plate (manufactured by Greiner) at a concentration of 10 ⁇ g / mL and left at 4 ° C for adsorption.
- PBS containing 1% BSA hereinafter referred to as BSA-PBS was added at 100 L / well, and reacted at room temperature for 1 hour to block remaining active groups.
- KM1471 0.16 zg / mL
- anti-hlGF rat monoclonal KM1472 7.0 g / mL
- anti-hlGF rat monoclonal KM1473 1.2 ⁇ g / mL
- the reaction was performed at room temperature for 2 hours. After the reaction, the cells were washed with Tween-PBS, diluted with 4,000-fold diluted peroxidase-labeled heron anti-rat Ig antibody (manufactured by DAK0) at 50 L / well, and reacted at room temperature for 1 hour.
- each of the anti-hIGF-I rat monoclonal antibodies showed the respective steric structure and reactivity in the hIGF-I liquid layer.
- the anti-hlGF rat monoclonal antibody KMU68 which exhibited the highest sensitivity, was able to detect hlGF-1 having a natural three-dimensional structure at a concentration of up to 16 ng / mL contained in the liquid phase system. I o ⁇
- the anti-hlGF rat monoclonal KM1468 may recognize the three-dimensional structure of hIGF-I in (1) above.
- the anti-WGF rat monoclonal oral antibody thigh 68 may recognize the primary amino acid sequence, and therefore, the reactivity with the hlGF-1 partial peptide was analyzed.
- a partial peptide of hIGF-I was synthesized.
- the synthesized peptides are 1st-18th of hIGF-I (SEQ ID NO: 56, hereinafter, described as pl-18), 14-30th (SEQ ID NO: 57, hereafter, described as pl4-3Q), 24-35th (SEQ ID NO: 58, hereinafter described as P24-35), 29th to 41st (SEQ ID NO: 59, hereinafter described as p29-41), 36th-47th (SEQ ID NO: 60, hereinafter described as 36-47) , 41-56 (sequence number 61, hereinafter described as 41-56), 52-70 (sequence number 62, hereinafter described as P52-70), 53-61 (sequence number 63, hereinafter, p53 -61) and 61-70 (SEQ ID NO: 64; hereinafter, referred to as p61-70)
- the plate was washed with Tween-PBS, and then diluted with a 4000-fold dilution of a secondary antibody, such as ⁇ -oxidase-labeled ⁇ egan anti-rat Ig antibody (manufactured by DAK0), at 50 / L / well, and reacted at room temperature for 1 hour. .
- a secondary antibody such as ⁇ -oxidase-labeled ⁇ egan anti-rat Ig antibody (manufactured by DAK0), at 50 / L / well, and reacted at room temperature for 1 hour.
- wash with Tween-PBS and add 0.55 g of ABTS substrate solution [2,2'-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) ammonium] to 1 L of 0.1 M citrate buffer.
- hIGF-I Purified anti-hIGF rat monoclonal KM1468 hlGF-II and human The cross-reactivity to phosphorus was examined in the competition ELISA shown below.
- antigens hIGF-I (Pepro Tech), hIGP-II (Pepro Tech) and human insulin (Wako Pure Chemical Industries) were used.
- the methylated BSA-hlGF-1 antigen prepared in Reference Example 1 (1) which is a methylated BSA-hlGF-II antigen prepared in the same manner as Reference Example 1 (1), is referred to in Reference Example 1 (4).
- FIG. 10A the binding of anti-hlGF rat monoclonal KM1468 to hlGF-1 was strongly inhibited by hlGF-1 and hlGF-II.
- FIG. 10B the binding of anti-hlGF rat monoclonal thigh 1468 to hlGF-II was strongly inhibited by hlGF-1 and hlGF-II. That is, it shows that the anti-hlGF rat monoclonal KM1468 can react to both hlGF-1 and hlGF-II with the same level of strength.
- the binding of anti-hlGF rat monoclonal KM1468 to hIGF-I or hlGF-II was not inhibited by human insulin.
- anti-hlGF rat monoclonal antibody KM1468 The comparison of the reactivity of the anti-hlGF rat monoclonal antibody KM1468 with two types of commercially available anti-hlGF antibodies to the antigen was examined as follows. As antibodies, anti-hlGF rat monoclonal KM1468, commercially available anti-] iIGF-I antibody sml.2 (manufactured by Upstate biotechnology) and commercially available anti-hIGF- ⁇ antibody S1F2 (manufactured by Upstate biotechnology) was. HIGF-I (manufactured by Pepro Tech), hIGF-II (manufactured by Pepro Tech) and human insulin (manufactured by Wako Pure Chemical Industries) were used as antigens.
- anti-hlGF rat monoclonal KM1468 and the antigen] iIGF-1 or hIGF-II, anti-hlGF rat monoclonal thigh 1468, commercially available anti-hlGF-1 antibody sml.2, and commercially available Anti-iIGF-II antibody The binding strength of the three antibodies S1F2 to hIGF-I and hIGF-II was determined using a biosensor Biacoi "e2000 (manufactured by Biacore) using surface plasmon resonance.
- HBS-EP (10fflM HEPES, 150mM NaCl 3mM EDTA ⁇ 0.005% ween20 pH7.4) (manufactured by Biacore) was used as the reaction buffer during the dilution of the analyte and the measurement.
- K A for hIGF-I anti-hlGF Radzutomonokuro one null thigh 1468 ⁇ . ⁇ ⁇ 1, is, the kappa Alpha for HlGF- II was ⁇ . ⁇ ⁇ 1.
- Anti HlGF Radzutomonokuro - the ratio of K A for MGF-I and hlGF-II of monoclonal antibody thigh 1468, approximately 1: Ri 1 der, anti HlGF La Uz Tomonokuro one monoclonal antibody thigh 1468 hIGF-I and HlGF- 11 of It was shown that both can bind equally strongly.
- K A is for hIGF-II, about 42 times for as compared to the K A of the commercially available anti-hIGF-I antibody sml.2 to hIGF-I, It was about 120 times that of hlGF-II.
- K A for K A (or 4.62 x10 8 M- 1 ⁇ hIGF-II for HlGF- 1 of commercially available anti-hIGF-II antibody S1F2 was 2.4X10 9 M- 1.
- Anti-hlGF La Uz preparative monoclonal KM1468 K a is against the Roh HlGF- 1 and hIGF-II, about 18-fold for hIGF-I compared to the K a commercial anti HlGF- II antibody S1F2, approximately for 1110?
- anti-hlGF rat monoclonal —nal KM1468 was compared to sml.2, a commercially available anti-hlGF-1 antibody, and S1F2, a commercially available anti] iIGF-II antibody, hIGF-II
- a transformant in which the hIGF-I gene was introduced into human lung cancer cell line A549 cells was prepared as described below.
- the hIGF-1 gene was cloned by PCR.
- synthetic DNAs each having the nucleotide sequence shown in SEQ ID NO: 66 and SEQ ID NO: 67 were designed.
- Each of the synthetic DNAs had the plasmid pBluescript II SK (-) (Stratagene) and pKANTEX93
- Each plasmid DNA was prepared from the transformant, reacted using BigDye Terminator Cycle Sequencing FS Ready Reaction Kit (manufactured by Applied Biosystems) according to the attached instructions, and the base sequence automatic analyzer ABI PRISM 377 (Applied Biosystems) ) was used to determine the nucleotide sequence.
- the plasmid pBS (II) SK (-) / hIGF-I shown in FIG. 11 having the gene sequence encoding hIGF-1 was obtained.
- RI-Iffil restriction enzyme fragment containing the gene encoding hIGF-1 of pBS (II) SK (-) / hIGF-1 obtained above and the RI-l fragment of PKANTEX93 were ligated.
- the plasmid pKANTEX93 / hIGF-I shown in FIG. 11 was constructed. Plasmid
- the nucleotide sequence of pKANTEX93 / hIGF-I was determined using the automatic nucleotide sequence analyzer ABI PRISM 377 as described above. As a result, a plasmid pKANTEX93 / hIGF-I containing the gene encoding the desired hIGF-I was obtained. '' (1-2) Preparation of hIGF-1 transformant
- the plasmid pKANTEX93 / hIGF-I obtained in the above (1-1) was introduced into animal cells, and hIGF-1 expressing cells were prepared as follows. '
- Plasmid pKANTEX93 / hIGF-I is treated with restriction enzyme ⁇ (manufactured by Toyobo Co., Ltd.) and linearized, and then 8 ⁇ g is transferred to 4 ⁇ 10 6 human lung cancer cell line A549 cells (ATCC CCL-185).
- restriction enzyme ⁇ manufactured by Toyobo Co., Ltd.
- 8 ⁇ g is transferred to 4 ⁇ 10 6 human lung cancer cell line A549 cells (ATCC CCL-185).
- RPMI1640 medium containing 15 mL of RPMI medium [10% FCS, 50 zg / mL Genyumycin (Nacalai Tesque) '( Invitrogen) and transferred to a T75 flask (Sumilon).
- A549 / MGF-I transformant showing G418 resistance (hereinafter referred to as A549 / MGF-I) was obtained.
- the following experiment was performed to confirm whether the introduced hIGF-I gene was expressed in the A549 / GF-I cell prepared in '(1) above and that the cell produced hIGF-I.
- the plate was washed with Tween-PBS, and then a 1000-fold diluted peroxidase-labeled egret anti-rat Ig antibody (manufactured by DAK0) was dispensed at 50 L / L and allowed to react at room temperature for 1 hour.
- anti-rat IgG-HRP manufactured by DAK0
- diluted 1000-fold was dispensed at 50 / L / well and allowed to react at room temperature for 1 hour.
- the plate is washed 5 'times with Ween-PBS, and 0.55 g of ABTS substrate solution [2,2'-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) ammonium is added to 1 L of 0.1 M Dissolve it in citrate buffer (pH 4.2), add a solution of hydrogen peroxide at 1 L / mL immediately before use] at 50 zl / well to develop color. It measured using.
- FIG. 12A The results are shown in FIG. As shown in Fig. 12A, the hIGF4 gene was introduced into the culture supernatant of A549 cells into which the hIGF-1 gene had not been introduced.
- binding activity was clearly reduced in the culture supernatant of A549 / hIGF-I cells, indicating that A549 / hIGF-I cells express hIGF-1. '
- the hIGF-1 transfected cells prepared in (1) above were used to determine whether the anti-hIGF rat monoclonal antibody KM1468 can inhibit hIGF-1-dependent cell growth (hereinafter referred to as autocrine cell growth) produced by the cells themselves.
- the examination was performed using A549 / MGF-1 cells.
- RPMI1640 medium manufactured by Invitrogen
- RPMI medium containing 10 ⁇ g / mL to 2 ⁇ 10 5 cells / mL.
- DMEM / F12 medium (-FCS, -Phenol red) (Invitrogen) containing human transfulin (GIBC0) and 200 zg / mL BSA (Invitrogen) (hereinafter referred to as serum-free medium) Suspended in water.
- FIG. 13 The horizontal axis shows the concentration of anti-hIGF rat monoclonal KM1468 in each well during culture.
- the growth of A549 / hIGF-1 cells without the addition of anti-MGF rat monoclonal thigh 1468 indicated by the dashed line is clearly increased when compared to the growth of A549 cells not producing MGF-1 shown by the solid line. are doing.
- anti-hIGF rat monoclonal-nal thigh 1,468 was added during the culture of A549 / hIGF-I cells.
- anti-hIGF rat monoclonal KM1468 had no effect on the proliferation of A549 cells. That is, it was shown that the anti-hIGF rat monoclonal KM1468 can inhibit autocrine cell proliferation by hIGF-I produced by the cells themselves.
- Cancerous cells have an anchorage-independent proliferative ability to proliferate in a floating state without cell adhesion such as in soft agar.
- This anchorage-independent growth potential Is very closely related to the tumorigenicity of cells and is thought to involve hIGF-I.
- RPMI medium hereinafter agar-RPI medium
- agar-RPI medium containing 0.3% agar noble (Difco)
- a gel was prepared by leaving the plate at room temperature for 10 minutes. After culturing A549 / hIGF-I cells or A549 cells in RPMI medium, they were suspended in agar-iffMI medium warmed to a cell density of 3 cells / mL.
- the anchorage-independent cell proliferation of A549 / hIGF-I cells was increased compared to the anchorage-independent cell proliferation of A549 cells.
- A549 / hIGF-1 cells were cultured in soft agar and supplemented with 10 ⁇ g / mL anti-hIGF rat monoclonal thigh 1468, anchorage-independent cell growth was reduced by anti-hIGF rat. ⁇ Completely inhibited by the addition of monoclonal antibody KM1468.
- hIGF-1 is involved in anchorage-independent cell growth, and that hIGF-1-dependent anchorage-independent cell growth is inhibited by anti-hIGF rat monoclonal KMU68. .
- AOO / L of a cell suspension of A549 / hIGF-1 cells or A549 cells was subcutaneously implanted into the right breast of a 6-week-old nude mouse Balb / c Ajc-1 nu (female).
- the number of cells transplanted per mouse is 7 lx10 cells.
- 500 ⁇ g / mouse of the anti-hIGF rat monoclonal KM1468 was intravenously administered twice a week for a total of eight times.
- the same tumor subcutaneously transplanted mouse was administered PBS at the same time.
- Five days after the cell transplantation the tumor volume was measured.
- the tumor volume (mm3) was calculated from the major axis, minor axis, and height of the tumor using the following formula: major axis ⁇ minor axis ⁇ height ⁇ 0.5236.
- mice transplanted with A549 cells and A549 / hIGF-I cells producing hIGF-I the subcutaneous tumors of mice transplanted with A549 / WGF-I cells were compared. Had higher tumor growth.
- subcutaneous tumor growth was significantly inhibited when anti-hIGF ratmo / clonal KM1468 was administered. This clearly shows that the anti-hIGF rat monoclonal KM1468 can inhibit tumor growth in vivo by inhibiting hIGF-I.
- the cDNA encoding the V region of the anti-hIGF rat monoclonal KM1468 was isolated and analyzed as follows.
- each reaction solution was packaged into the phage using Gigapack III Gold Packaging Extracts (Stratagene ') according to the attached instruction manual, and anti-hIGF rat monoclonal 5 x 10 4 cells as H chain cDNA library of monoclonal antibody KM1468, were obtained 4 X 10 4 cells fa one Jikuron as L chain cDNA library scratch.
- each phage was placed on a nylon membrane filter Hybond-N + (manufactured by Amersham-Pharmacia) according to a conventional method (Molecular Cloning: A 'Laboratory Manual, Cold Spring Harbor Lab. Press New York, 1989). Fixed.
- each phage clone was converted into a plasmid by the in vivo excision method according to the instruction manual of the human Predigested EcoRI / CIAP-Treated Vector Kit (Stratagene).
- the nucleotide sequence of the cDNA contained in each plasmid was converted into a plasmid by the in vivo excision method according to the instruction manual of the human Predigested EcoRI / CIAP-Treated Vector Kit (Stratagene).
- the entire amino acid sequence of the VL of the deduced anti-hIGF rat monoclonal antibody KM1468 is shown in SEQ ID NO: 4, respectively.
- the nucleotide sequences corresponding to the amino acid sequences described in SEQ ID NOs: 2 and 4 are innumerable in addition to those described in SEQ ID NOs: 1 and 3, but all of them are included in the scope of the present invention. . Comparison of the sequence of known antibodies (Sequences of Proteins of Immunological Interest, US Dept.
- each of the isolated cDNAs completely encodes the H chain and L chain of the anti-hIGF rat monoclonal KM1468 including the secretory signal sequence. It is a long cDNA.
- the 1st to 19th amino acids of the amino acid sequence shown in SEQ ID NO: 2 are as follows: Regarding VL, it was revealed that positions 1 to 22 of the amino acid sequence shown in SEQ ID NO: 4 are secretory signal sequences.
- CDRs of VH and VL of anti-hIGF rat monoclonal KM1468 were identified by comparing with the amino acid sequences of known antibodies.
- Anti-hi GF rat monoclonal The amino acid sequence of CDR1, 2, and 3 of VH of KM1468 is shown in SEQ ID NOs: 5, 6, and 7, respectively, and the amino acid sequence of CDR1, 2, and 3 of VL is shown in SEQ ID NO: 8, 9 and 10 respectively.
- a plasmid containing the humanized antibody expression vector PKANTEX93 capable of expressing the human IgG1 and class antibodies described in WO97 / 10354 and the H-chain and L-chain cDNAs of the anti-hIGF rat monoclonal antibody KM1468 obtained in Reference Example 5 (3) was used to construct an anti-hIGF- ⁇ human-type chimeric antibody expression vector derived from the anti-hIGF rat monoclonal antibody KM1468 as follows.
- VH and VLcDM of the anti-hIGF rat monoclonal antibody KM1468 were reconstructed by PCR in order to insert the VH and VL cDNAs of KM1468 into the expression vector PKANTEX93 so that the amino acid sequence was not changed.
- Primer for VHcDNA A synthetic DNA having the base sequences of SEQ ID NO: 68 and SEQ ID NO: 69 was designed, and a synthetic DNA having the base sequences of SEQ ID NO: 70 and E column No.71 for VtcDNA was designed. Each synthetic DNA contains a restriction enzyme recognition sequence at the 5 'end to clone to PKANTEX93.
- KOD DNA Polymerase manufactured by Toyobo Co., Ltd.
- a cycle of 15 seconds at 98 ° C, 2 seconds at 65 ° C, and 30 seconds at 74 ° C is performed for 25 cycles. I got it.
- plasmid PKM1468L5-1 obtained in Reference Example 5 (3) was added to 50 ⁇ L of KOD DNA Polymerase-attached PCR Buffer # 1 (Toyobo Co., Ltd.), 0.2 mM dNTPs, ImM magnesium chloride, 0.5 ⁇ M was added to a buffer containing a synthetic DNA having the nucleotide sequence shown in SEQ ID NOS: 69 and 70, and PCR was carried out in the same manner as described above. After agarose gel electrophoresis of 10 / L of each reaction solution, use the QIAquick Gel Extraction Kit.
- the recombinant plasmid DNA solution thus obtained was used to transform Escherichia coli DH5 o: strain (manufactured by Toyobo Co., Ltd.). Each plasmid DNA was prepared from the transformant, and reacted using BigDye Terminator Cycle Sequencing FS Ready Reaction Kit (Applied Bi.osystems) according to the attached instructions.
- the nucleotide sequence was determined using an analyzer ABI PRISM 377 (manufactured by Applied Biosystems). Thus, the plasmids pKM1468VH and PKM1468VL shown in FIG. 16 having the desired nucleotide sequence were obtained. .
- a restriction enzyme fragment containing the VH cDNA of PKM1468VH obtained above (MI- was inserted into the MI-I site of the humanized antibody expression vector PKANTEX93 to construct the plasmid pKANTEX1468H shown in FIG. 17.
- the restriction enzyme fragment (RI-WI) containing the VL cDNA of pKM1468VL obtained above was inserted into the EcoRI-BsiWI site of the plasmid PKANTEX1468H to construct the plasmid pKANTEX1468Chi shown in Fig. 17.
- the anti-hlGF human chimeric antibody expression vector pKANTEX1468 obtained in (2) above.
- the plasmid pKANTEX1468Chi was replaced with the restriction enzyme Aatll (Toyobo Co., Ltd. 10 / g was transformed into 4 x 10 6 cells of rat myeloma cell line fa strain YB2 / 0 cells (ATCC C L1581) by the electoral poration method (Cytotechnology, 3, 133-cells).
- H-SFM H-SFM containing 5% FCS (Gibco BRL)]
- 96-well culture plate Sumitomo Belite
- the concentration of the anti-hlGF human chimeric antibody in the culture supernatant was measured by the binding ELISA described in Reference Example (5) described below.
- the MTX concentration was sequentially increased to 100 nM and 200 nM in the same manner as described above, and finally G418 was reduced to 0.
- a transformant capable of growing on H-SFM (5) containing 5 mg / mL of MTX at a concentration of 200 nM and highly expressing the anti-hlGF human chimeric antibody was obtained.
- the obtained transformant was subjected to single cell dilution by the limiting dilution method twice to obtain a transformant having the highest expression of the anti-hlGF human chimeric antibody.
- An example of a transformed cell line producing an anti-hlGF human chimeric antibody derived from the anti-hlGF rat monoclonal ⁇ KM1468 is a transformant KM3002.
- the transformant thigh 3002 was obtained from the National Institute of Advanced Industrial Science and Technology, Patent Organism Depositary on April 2, 1994 (Tsukuba East, Ibaraki, Japan; 6 Deposited with zip code 305-8585 6) as FERM BP-7996.
- the transformed cell line KM3002 which expresses the anti-hlGF human quinula antibody obtained in (3), was purified using G418 at 0.5 mg / mL, ⁇ at 200 nM, and Daigo's GF21 (manufactured by Wako Pure Chemical Industries).
- the cells were suspended in H-SFM containing a concentration of 5% to a concentration of 1 to 2 ⁇ 10 5 cells / mL, and dispensed into 175 cm 2 flasks (manufactured by Greiner) in 100 mL portions. 37. C ;, and cultured 5% C0 2 in the incubator for 5-7 days, the culture supernatant was recovered when they became Konfuruen Bok.
- Purify the anti-hlGF human chimeric antibody KM3002 from about 1 L of the culture supernatant using a Prosep-A (Bioprocessing) column according to the attached instructions, and obtain about 10.2 mg of the purified protein.
- the purified anti-hIGF chimeric antibody thigh 3002 has a single band with a molecular weight of about 150 kilodaltons (Kd) under non-reducing conditions, and two bands of about 50 Kd and about 25 Kd under reducing conditions. Was observed.
- the IgG class antibody has a molecular weight of about 150I (d) under non-reducing conditions, an SS bond in the molecule is cleaved under reducing conditions, and an H chain having a molecular weight of about 50Kd and an H chain of about 25Kd.
- Anti-hIGF human chimera consistent with the report that it is degraded into L chains with a molecular weight (Antibodies: A Laboratory Manual, Cold Spring Harbor Laboratory, Chapter 14, 1988; Monoclonal Antibodies: Principles and Practice, Academic Press Limited, 1996) It was confirmed that the antibody KM3002 was expressed as an antibody molecule with the correct structure, and the N-terminal amino acid sequence of the H-chain and L-chain of the purified anti-hIGF chimeric antibody KM3002 was compared with the protein sequencer PPSQ-10. As a result of analysis using (manufactured by Shimadzu), it was confirmed that the amino acid sequence matched the N-terminal amino acid sequence of the H chain and L chain of the anti-hIGF antibody KM1468.
- the reactivity of the anti-hIGF rat antibody KM1468 and the anti-hIGF chimeric antibody KM3002 with hIGF-I was examined by ELISA shown in Reference Example 1 (4). However, the concentration of methylated BSA-hIGF-II immobilized on the ELISA plate was 0.5 g / mL.
- a secondary antibody in the case of a rat antibody, a 4000-fold diluted peroxidase-labeled rabbit herb anti-rat Ig antibody ( DAK0) and in the case of a chimeric antibody, a 1000-fold diluted peroxidase-labeled mouse anti-human IgG1 antibody (Southern Biotechnology) was used. As shown in FIG.
- the anti-hIGF chimeric antibody KM3002 showed an antibody concentration-dependent binding activity to hIGF-1.
- the activity was comparable to that of the anti-hIGF rat antibody KM1468, although it was difficult to make a direct comparison because the secondary antibody was different.
- the present invention specifically binds to human insulin-like growth factor-1 (hereinafter, referred to as hlGF-1) and human insulin-like growth factor-II (hereinafter, referred to as hlGF-II) with similar strength.
- hlGF-1 human insulin-like growth factor-1
- hlGF-II human insulin-like growth factor-II
- a recombinant antibody having the ability to inhibit the biological activity of human IGF-1 and human IGF-II, or the antibody fragment, a transformant producing the antibody or the antibody fragment, production of the antibody or the antibody fragment. It is an object of the present invention to provide a method and a medicament containing the antibody or the antibody fragment as an active ingredient.
- FIG. 1 shows the construction steps of plasmids pBS / CamHVO and pBS / LVO.
- FIG. 2 is a diagram showing a construction process of plasmid pKANTEX93 / CamHV07LV0.
- FIG. 3 is a view showing the specific reactivity of the anti-hlGFCDR-grafted antibody to hIGF-I (binding ELISA). The horizontal axis shows the antibody concentration, and the vertical axis shows the binding activity by absorbance (415 dishes).
- Anti-hlGF human chimeric antibody KM3002 shown in the mouth, anti-hlGFCDR-grafted antibody shown in ⁇ , CamHVO / LVO, anti-hlGFCDR-grafted antibody shown in ⁇ , QAR / LV0, anti-hlGFCDR-grafted antibody The results of the anti-hlGFCDR-grafted antibody CamHV0 / NYPLL3All indicated by QGAR / LV0 and Yuna!
- FIG. 4 is a graph showing the MGF-I or hlGF-II-dependent cell growth inhibitory effect of the anti-hlGFCDR-grafted antibody.
- a shows the results in the presence of 10 ng / mL hlGF-1 and b shows the results in the presence of 20 ng / mL hIGF-II.
- the abscissa indicates the antibody concentration (Adg / mL).
- the ordinate indicates the cell proliferation value by absorbance (OD450 employed).
- Solid line in the figure is hIGF-I or hIGF-II
- the dashed line indicates the baseline of cell growth without added antibody and no antibody, and the broken line indicates the baseline of cell growth without hlGF-1 or hIGF-II and no antibody.
- ⁇ anti hlGF human chimeric antibody thigh 3002 ⁇ anti hIGFCDR grafted antibody CamHV0 / LV0, ⁇ anti hIGFCDR grafted antibody QAR / LV0, ⁇ indicates it is its results of anti hIGFCDR grafted antibody QGAR / LV0 Q
- FIG. 5 is a view showing the hIGF-I or hIGF- ⁇ -dependent cell growth inhibitory effect of the anti-hIGFCDR-grafted antibody.
- a shows the results in the presence of lOng / mL hlGF-1 and b shows the results in the presence of 20 ng / mL hlGF-II.
- the horizontal axis shows the antibody concentration ( ⁇ g / mL), and the vertical axis shows the cell proliferation value in absorbance (OD450 dish).
- the solid line indicates the baseline of cell growth when hIGF-I or hIGF- ⁇ is added and the antibody is not added
- the broken line indicates the baseline of cell growth when hIGF-I or hIGF-II is not added and the antibody is not added.
- ⁇ anti-hIGFCDR-grafted antibody CamHV0 / NYPLL3Al1, garden: ⁇ hIGFCDR-grafted antibody QGAR / NYPLL3A11
- the results are shown respectively.
- FIG. 6 shows the hlGF-1 or hIGF-II-dependent cell growth inhibitory effect of the anti-MGFCDR-grafted antibody.
- a shows the results in the presence of 10 ng / mL WGF-I
- b shows the results in the presence of 20 ng / mL hIGF-II.
- the horizontal axis indicates the antibody concentration (g / mL), and the vertical axis indicates the cell proliferation value by absorbance (OD450 dish).
- the solid line shows the pace of cell growth when hIGF-I or hIGF-II was added and no antibody was added
- the broken line shows the pace of cell growth when hIGF-I or hIGF-II was not added and no antibody was added.
- FIG. 7 is a diagram showing the specific reactivity of anti-hlGF rat monoclonal antibody to hIGF-I (binding ELISA).
- the black bars show the results when methylated BSA-hlGF-1 was used as the antigen
- the white bars show the results when methylated BSA-BSA was used as the antigen.
- Figure 8 shows the natural steric structure of the anti-hlGF rat monoclonal antibody in the liquid phase system.
- FIG. 4 is a view showing the reactivity to hlGF-1 having a structure (competition ELISA).
- FIG. 9 is a graph showing the inhibitory activities of various peptides on the binding of anti-hlGF rat monoclonal and monoclonal antibody KM1468 to hIGF-I.
- the horizontal axis indicates the concentration of each peptide (/ g / mL), and the vertical axis indicates the binding activity ().
- the results of p456 shown in X, hIGF-I shown in B, p41-56C shown in ⁇ , p52-70 shown in the mouth, pi-18 and p41-56C shown in the garden The results of pi-18 and ⁇ 52-70 indicated by ⁇ , ⁇ 4 56C and ⁇ 52-70 indicated by ⁇ , pl-18, P41-56C and ⁇ 52-70 indicated by ⁇ ⁇ are shown.
- FIG. 10 is a graph showing the inhibitory activities of hIGF-I, hIGF-II and human insulin on the binding of anti-hlGF rat monoclonal thigh 1468 to hIGF-.I and hlGF-11.
- A shows the binding between the anti-hlGF rat monoclonal antibody KMU68 and hIGF-I
- B shows the inhibition by various factors to the binding between the anti-hlGF rat monoclonal antibody KM1468 and hIGF-II.
- the horizontal axis shows the concentration of various factors ( ⁇ g / mL), and the vertical axis shows the binding activity (%) when the factor was not added as 100%.
- ⁇ indicates the results for hlGF-1
- ⁇ indicates the results for hlGF-II
- ⁇ indicates the results for human insulin.
- FIG. 11 is a diagram showing the steps of constructing plasmids pBS (II) SK ( ⁇ ) / hIGF-1 and pKANTEX93 / hIGF-I.
- FIG. 12 is a diagram showing expression of hlGF-1 in A549 / hIGF-1 cells.
- A shows the degree of inhibition by the recombinant hlGF-1 protein.
- the horizontal axis shows the concentration of the recombinant hlGF-1 protein added, and the vertical axis shows the binding activity (OD415).
- the dashed line shows the results when no recombinant hIGF-I protein was added.
- B shows hIGF-I contained in the culture supernatant of A549 cells and A549 / WGF-1 cells. Opened A549 cells, shaded A549 / hIGF-I cells Shown respectively.
- FIG. 13 is a view showing the cell growth inhibitory effect of anti-hlGF rat monoclonal antibody KM1468 on GF-1 expressing cells.
- the broken line indicates the proliferation of A549 / hlGF-I cells without the addition of anti-hlGF rat monclonal thigh 1468, and the solid line indicates the proliferation of A549 cells without the addition of anti-hlGF rat monocyte KM1468.
- ⁇ indicates the proliferation of A549 / WGF-I cells to which anti-hlGF rat monoclonal KM1468 was added, and ⁇ indicates the proliferation of A549 cells to which anti-hlGF rat monoclonal KM1468 was added.
- FIG. 14 is a view showing the effect of the anti-hlGF rat monoclonal antibody KM1468 on anchorage-independent growth inhibition.
- the white columns in the figure indicate the number of A549 cell colonies formed, the shaded columns indicate the number of A549 / WGF-I cells formed, and the black columns indicate A549 / MGF to which anti-hlGF rat monoclonal KM1468 was added. -Indicates the number of cells formed.
- FIG. 15 shows the antitumor effect of anti-hlGF rat monoclonal KM1468.
- the horizontal axis indicates the number of days elapsed after tumor implantation, and the vertical axis indicates the tumor volume.
- the reference symbol indicates the case without addition of anti-hlGF rat monoclonal KH1468, and the symbol indicates the case of adding anti-hlGF rat monoclonal KM1468.
- the country indicates the absence of anti-hlGF rat monoclonal KM1468
- the mouth indicates the presence of anti-hlGF rat monoclonal KM1468.o
- FIG. 16 shows the steps of constructing plasmids pKM1468VH and pKM1468VL.
- FIG. 17 is a diagram showing a construction process of plasmid pKANTEX1468CM.
- FIG. 18 is a diagram showing an electrophoresis pattern of purified anti-hlGF human chimeric antibody KM3002 by SDS-PAGE (using a 4 to 15% gradient gel). Electrophoresis was performed on the left under non-reducing conditions, and on the right under reducing conditions. Lane M is not
- Lane 1 shows the migration pattern of the anti-hlGF human chimeric antibody KM3002 when the high molecular weight marker and the low molecular weight marker are used for the reduction.
- FIG. 19 shows the responses of the anti-hlGF rat monoclonal antibody KM1468 and the anti-hlGF human chimeric antibody KM3002 to hlGF-1.
- the horizontal axis indicates the antibody concentration ( ⁇ g / mL), and the vertical axis indicates the binding activity (OD415).
- ⁇ indicates the reactivity of the anti-hlGF rat monoclonal oral antibody KM1468 and KIGA the reactivity of the anti-hlGF human chimeric antibody KM3002, respectively.
- SEQ ID NO: 36-Description of artificial sequence Synthetic DNA SEQ ID No. 37-Description of Artificial Sequence: Synthetic DNA SEQ ID No. 38-Description of Artificial Sequence: Synthetic DNA SEQ ID No. 39-Description of Artificial Sequence: Synthetic DNA SEQ ID No. 40-Description of Artificial Sequence: Synthetic DNA SEQ ID No. 41-Artificial Sequence Description: Synthetic DNA SEQ ID NO: 42-Description of human sequence: Synthetic DNA SEQ ID NO: 43-Description of artificial sequence: Synthetic DNA SEQ ID NO: 44-Description of artificial sequence: Synthetic DNA SEQ ID NO: 45-Description of artificial sequence: Synthetic DNA SEQ ID No. 46-Description of Artificial Sequence: Synthetic DNA SEQ ID No.
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Priority Applications (6)
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AT04773541T ATE492562T1 (de) | 2003-09-24 | 2004-09-24 | Rekombinanter antikörper gegen humanen insulin- like growth factor |
DE602004030700T DE602004030700D1 (de) | 2003-09-24 | 2004-09-24 | Rekombinanter antikörper gegen humanen insulin-like growth factor |
EP04773541A EP1676862B1 (en) | 2003-09-24 | 2004-09-24 | Recombinant antibody against human insulin-like growth factor |
JP2005514152A JP4620591B2 (ja) | 2003-09-24 | 2004-09-24 | ヒトインスリン様成長因子に対する遺伝子組換え抗体 |
CA2540138A CA2540138C (en) | 2003-09-24 | 2004-09-24 | Recombinant antibody against human insulin-like growth factor |
US10/573,378 US7498415B2 (en) | 2003-09-24 | 2004-09-24 | Recombinant antibody against human insulin-like growth factor |
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JP2003331509 | 2003-09-24 | ||
JP2003-331509 | 2003-09-24 |
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PCT/JP2004/014453 WO2005028515A1 (ja) | 2003-09-24 | 2004-09-24 | ヒトインスリン様成長因子に対する遺伝子組換え抗体 |
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US (1) | US7498415B2 (ja) |
EP (1) | EP1676862B1 (ja) |
JP (1) | JP4620591B2 (ja) |
AT (1) | ATE492562T1 (ja) |
CA (1) | CA2540138C (ja) |
DE (1) | DE602004030700D1 (ja) |
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- 2004-09-24 US US10/573,378 patent/US7498415B2/en not_active Expired - Fee Related
- 2004-09-24 JP JP2005514152A patent/JP4620591B2/ja not_active Expired - Fee Related
- 2004-09-24 EP EP04773541A patent/EP1676862B1/en not_active Expired - Lifetime
- 2004-09-24 CA CA2540138A patent/CA2540138C/en not_active Expired - Fee Related
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- 2004-09-24 AT AT04773541T patent/ATE492562T1/de not_active IP Right Cessation
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WO2010045315A1 (en) | 2008-10-14 | 2010-04-22 | Dyax Corp. | Use of igf-ii/igf-iie binding for the treatment and prevention of systemic sclerosis associated pulmonary fibrosis |
US8318159B2 (en) | 2008-12-12 | 2012-11-27 | Boehringer Ingelheim International Gmbh | Anti-IGF antibodies |
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US10179810B2 (en) | 2008-12-12 | 2019-01-15 | Boehringer Ingelheim International Gmbh | Anti-IGF antibodies |
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Also Published As
Publication number | Publication date |
---|---|
JP4620591B2 (ja) | 2011-01-26 |
US7498415B2 (en) | 2009-03-03 |
US20060240015A1 (en) | 2006-10-26 |
CA2540138C (en) | 2013-07-30 |
ATE492562T1 (de) | 2011-01-15 |
DE602004030700D1 (de) | 2011-02-03 |
EP1676862A4 (en) | 2007-08-08 |
JPWO2005028515A1 (ja) | 2007-11-15 |
EP1676862B1 (en) | 2010-12-22 |
EP1676862A1 (en) | 2006-07-05 |
CA2540138A1 (en) | 2005-03-31 |
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