WO2005035756A1 - 機能蛋白質を代替する二種特異性抗体 - Google Patents
機能蛋白質を代替する二種特異性抗体 Download PDFInfo
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- WO2005035756A1 WO2005035756A1 PCT/JP2004/014911 JP2004014911W WO2005035756A1 WO 2005035756 A1 WO2005035756 A1 WO 2005035756A1 JP 2004014911 W JP2004014911 W JP 2004014911W WO 2005035756 A1 WO2005035756 A1 WO 2005035756A1
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
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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
- C07K16/36—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against blood coagulation factors
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P7/00—Drugs for disorders of the blood or the extracellular fluid
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P7/00—Drugs for disorders of the blood or the extracellular fluid
- A61P7/04—Antihaemorrhagics; Procoagulants; Haemostatic agents; Antifibrinolytic agents
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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
-
- 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
- C07K16/2866—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against receptors for cytokines, lymphokines, interferons
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
- C07K16/40—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against enzymes
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2317/00—Immunoglobulins specific features
- C07K2317/20—Immunoglobulins specific features characterized by taxonomic origin
- C07K2317/24—Immunoglobulins specific features characterized by taxonomic origin containing regions, domains or residues from different species, e.g. chimeric, humanized or veneered
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2317/00—Immunoglobulins specific features
- C07K2317/30—Immunoglobulins specific features characterized by aspects of specificity or valency
- C07K2317/31—Immunoglobulins specific features characterized by aspects of specificity or valency multispecific
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2317/00—Immunoglobulins specific features
- C07K2317/60—Immunoglobulins specific features characterized by non-natural combinations of immunoglobulin fragments
- C07K2317/62—Immunoglobulins specific features characterized by non-natural combinations of immunoglobulin fragments comprising only variable region components
- C07K2317/622—Single chain antibody (scFv)
Definitions
- the present invention relates to a bispecific antibody that substitutes for the action of a cofactor that enhances an enzymatic reaction, and a pharmaceutical composition containing the antibody as an active ingredient.
- Antibodies have attracted attention as pharmaceuticals because of their high stability in blood and low antigenicity. Among them are bispecific antibodies that can recognize two kinds of antigens simultaneously. Bispecific antibodies have been proposed for a long time. However, only antibodies that simply link two types of antigens, such as for the purpose of retargeting NK cells, macrophages, and T cells, have been reported (Non-Patent Document 7). For example, MDX-210, which is undergoing clinical trials, is a bispecific antibody that expresses Fcy RI, expresses monocytes and the like, expresses HER-2 / neu, and retargets them to cancer cells. Not just. Thus, to date, bispecific antibodies have been used as alternatives to cofactors that enhance enzymatic reactions.
- tissue factor for example, tissue factor (TF), blood coagulation factor V (FV), activated blood coagulation factor V (Fv a), blood coagulation vm factor (F.vm), activity I Dani blood coagulation factor vm (TF), blood coagulation factor V (FV), activated blood coagulation factor V (Fv a), blood coagulation vm factor (F.vm), activity I Dani blood coagulation factor vm (TF), blood coagulation factor V (FV), activated blood coagulation factor V (Fv a), blood coagulation vm factor (F.vm), activity I Dani blood coagulation factor vm (TF), blood coagulation factor V (FV), activated blood coagulation factor V (Fv a), blood coagulation vm factor (F.vm), activity I Dani blood coagulation factor vm (TF), blood coagulation factor V (FV), activated blood coagulation factor V (Fv a), blood coagulation vm factor
- TM Thrombomodulin
- PS Protein S
- PZ Protein Z
- Heparin Heparin
- Complement C4b Complement Regulatory Factor H
- MCP Membrane Cofactor Protein
- CR1 Complement Receptor 1
- F.VIII / F.VIIIa is a cofactor necessary for the active expression of activated blood coagulation factor IX (F.IXa).
- FXa activated blood coagulation factor X
- Scheiflinger F and colleagues show that certain anti-F.IX / F.IXa antibodies have an effect in chromogenic assays to promote F.IXa-induced blood coagulation factor X (FX) activation.
- FX blood coagulation factor X
- F.VIIIa is known to interact not only with F.IXa but also with F.X
- Patent Document 1 International Publication No. 01/19992
- Patent Document 2 U.S. Pat.No. 4,474,893
- Patent Document 3 EP404,097
- Patent Document 4 WO 93/11161
- Patent Document 5 Japanese Patent Application No. 2002-112369
- Patent Document 6 Japanese Patent Application No. 2003-012648
- Patent Document 7 JP-A-5-304992
- Patent Document 8 JP-A-2-145187
- Patent Document 9 JP-A-5-213775
- Patent Document 10 JP-A-10-165184
- Patent Document 11 JP-A-11-71288
- Patent Document 12 Japanese Patent Publication No. 2002-518041
- Patent Document 13 Japanese Patent Publication No. 11-506310
- Patent Document 14 JP-A-5-199894
- Patent Document 15 Japanese Patent Publication No. 10-511085
- Patent Document 16 JP-A-5-184383
- Non-Patent Document l Nilsson IM et al., ⁇ J. Intern.Med. '', 1992, Vol.235, p.25-32
- Non-Patent Document 2 Lofqvist T et al., ⁇ J. Intern.Med. '', 1997, Vol.241, p.395-400 Cfe, "o" in "Lofqvist T” is an umlauts
- Non-Patent Document 3 24th Annual Meeting of the Japanese Society of Thrombosis and Hemostasis Minimal Symposium on Standardization of Hemophilia Subcommittee, 2001, http://www.jsth.org
- Non-Patent Document 4 Medical Bulletin # 193 1994
- Non-Patent Document 5 Mertens K et al., “Thromb. Haemost.”, 1999, Vol.82, p.209-217
- Non-Patent Document 6 Lapan KA et al., “Thromb. Haemost.”, 1998, Vol. .80, p.418-422
- Non-Patent Document 7 Segal DM et al., “Journal of Immunological Methods", 2001, Vol.248, p.1-6
- Non-Patent Document 8 Bos R and Nieuwenhuitzen W, ⁇ Hybridoma '', 1992, Vol. 11, No. 1, p. 41-51
- Non-Patent Document 9 Brennan M et al., ⁇ Science '', 198 ⁇ , Vol.229, No. 1708, p.81-3
- Non-Patent Document 10 Karpovsky B et al., ⁇ J. Exp.Med. '', 1984 Year, Vol.160, No.6, p.1686-701
- Non-patent literature ll Suresh MR et al., "Methods Enzymol.”, 1986, Vol. 121, p. 210-28
- Non-patent literature 12 Massimo YS et al., "J. Immunol. Methods", 1997, Vol. .201, p.57-66
- Non-Patent Document 13 Brennan M et al., ⁇ Science '', 1985, Vol.229, p.81
- Non-patent Document 14 Shalaby MR et al., ⁇ J. Exp.Med. '', 1992, Vol. 175, p. 217-25
- Non-Patent Document 15 Holliner P et al., ⁇ Proc. Natl. Acad. Sci. USA, 1993, Vol. 90, p.
- Non-Patent Document 16 Ridgway JB et al., ⁇ Protein Eng.J, 1996, Vol. 9, p. 617-21
- Non-Patent Document 17 Hammerling U et al., ⁇ J. Exp.Med. '', 1968, Vol.128, p.1461-73
- Non-Patent Document 18 KurokawaT et al., ⁇ Bio / Technology '', 1989, Vol. 7, p.1163
- Non-Patent Document 19 Link BK et al., ⁇ Blood '', 1993 , Vol.81, p.3343
- Non-Patent Document 20 Nitta T et al., ⁇ Lancet '', 1990, Vol.335, p.368-71
- Patent Document 21 deLeij L et al., ⁇ Foundation Nationale de Translusion Sanguine, Les
- Non-Patent Document 22 Le Doussal JM et al., ⁇ J. Nucl.Med. '', 1993, Vol.34, p.1662-71
- Non-Patent Document 23 Stickney DR et al., ⁇ Cancer Res.J, 1991 Vol. 5 K p. 6650-5
- Non-Patent Document 24 Weiner LM et al., ⁇ Cancer Res. '', 1993, Vol. 53, p. 94-100
- Non-Patent Document 25 Kroesen BJ et al., ⁇ Br J. Cancer, 1994, Vol. 70, p. 652-61
- Non-Patent Document 26 Weiner GJ et al., "J. Immunol.”, 1994, Vol. 152, p. 2385.
- Non-Patent Document 27 Suresh MR et al., ⁇ Pro Natl. Acad. Sci. USA '', 1986, Vol. 83, p. 7989-93
- Non-Patent Document 28 Milstein C and Cuello AC, ⁇ Nature '', 1983, Vol. 305, p. 537
- Non-Patent Document 29 Xiang J et al., ⁇ Mol. Immunol. '', 1990, Vol. 27, p. 809
- Non-Patent Document 30 Bebbington CR et al., ⁇ Bio / Technology '', 1992, Vol. 10, p. 169
- Non-Patent Document 31 Huse WD et al., "Science", 1989, Vol. 246, p. 1275
- Non-Patent Document 33 Kang AS et al., ⁇ Proc. Natl. Acad. Sci. USA '', 1991, Vol. 88, p.
- An object of the present invention is to provide a bispecific antibody that substitutes for the function of a cofactor that enhances an enzymatic reaction.
- the inventors of the present invention have conducted intensive studies, and as a result, specifically bind to both F.IX / F.IXa and FX, and act as a cofactor of F. Villa, ie, FX activity by F.IXa. Have succeeded in finding a bispecific antibody that substitutes for the action that promotes anti-inflammatory activity. That is, the present inventors have succeeded in producing a bispecific antibody that recognizes both an enzyme and a substrate of the enzyme and can substitute for the function of a cofactor of the enzyme.
- the present invention relates to a bispecific antibody that substitutes for the function of a cofactor that enhances an enzyme reaction, and more specifically,
- the enzyme of blood coagulation / fibrinolysis-related factor is blood coagulation factor IX and / or activated coagulation factor IX
- the substrate is blood coagulation factor X
- the cofactor is blood coagulation factor VIII and VIII.
- Or is an active dani blood coagulation factor VIII, the antibody according to (3),
- a blood coagulation factor X antibody comprising a complementarity-determining region comprising the amino acid sequence of CDR3 described in any of the following (bl) to (b9) or a complementarity-determining region functionally equivalent thereto: 1) the antibody according to any one of [ 4 ],
- H chain CDR3 is SEQ ID NO: 28: described: amino: no acid sequence
- H chain CDR3 is SEQ ID NO: 36: Amino acid described: SEQ ID NO: 36
- H chain CDR3 is SEQ ID NO: 52: Amino acid described:: No acid sequence
- a complementarity-determining region comprising the amino acid sequence of the following (al) or (a2) CDR of an anti-coagulation factor IX / IXa antibody or a functionally equivalent complementarity-determining region;
- a factor X antibody comprising a complementarity-determining region comprising the amino acid sequence of the CDR according to any one of the following (bl) to (b9) or a functionally equivalent complementarity-determining region: ( 4 ) the antibody according to any of ( 4 ),
- (b3) the heavy chain CDR1, 2, 3 has the amino acid sequence of SEQ ID NO: 30, 31, 32.
- H chain CDR1, 2, 3 has the amino acid sequence of SEQ ID NO: 38, 39, 40
- H chain CDR1, 2, 3 has the amino acid sequence of SEQ ID NO: 42, 43, 44
- the heavy chain CDR1, 2, 3 has the amino acid sequence of SEQ ID NO: 46, 47, 48
- the heavy chain CDRs 1, 2, and 3 have the amino acid sequences of SEQ ID NOs: 50, 51, and 52
- composition comprising the antibody according to any one of (1) to (6) and a pharmaceutically acceptable carrier
- composition according to (7) which is a pharmaceutical composition used for prevention and / or treatment of bleeding, a disease associated with bleeding, or a disease caused by bleeding;
- composition according to [9] which is a disease power which develops and / or progresses due to a decrease or deficiency in the activity of blood coagulation factor VIII and / or blood coagulation factor VIII.
- Blood coagulation factor VIII and / or activity A disease power that develops and / or progresses due to a decrease or deficiency in the activity of blood coagulation factor VIII blood coagulation factor VIII and / or active coagulation factor VIII
- the composition according to (9), wherein an inhibitor against the disease has appeared.
- composition according to [9] which is a disease that develops and / or progresses due to a decrease or deficiency in the activity of blood coagulation factor VIII and / or blood coagulation factor VIII, and is acquired hemophilia.
- bleeding comprising a step of administering the antibody according to any one of [1]-[6] or the composition according to any one of [7]-[13].
- FIG. 1 is a view showing an insertion region of pcDNA4-g4H.
- FIG. 2 is a view showing insertion regions of pcDNA4-g4L and pIND-g4L.
- FIG. 3 is a view showing an insertion region of pIND-g4H.
- Figure 4 shows the anti-F.IXa / anti-FX bispecific antibodies prepared using anti-F.IXa antibody XB12 and anti-FX antibodies SB04, SB21, SB42, SB38, SB30, SB07, SB05, SB06, and SB34.
- the figure shows the results of measuring F.VIIIa-like activity.
- the concentration of the antibody solution is 10 g / mL (final concentration 1 ⁇ g / mL).
- bispecific antibodies showed an increase in F.VIIIa-like activity, XB12 / SB04, XB12 / SB21, XB12 / SB42, XB12 / SB38, XB12 / SB30, XB12 / SB07, XB12 / SB05, The activity was strong in the order of XB12 / SB06, XB12 / SB34.
- FIG. 5 shows anti-F.IXa / anti-FX bispecific antibodies or anti-F.IXa / anti-FX antibodies prepared using anti-F.IXa antibody XT04 and anti-FX antibodies SB04, SB21, SB42, SB38, SB30, SB07, SB05, SB06, SB34.
- FIG. 10 shows the results of measuring F.VIIIa-like activity of the XT04 antibody.
- the concentration of the antibody solution is 10 g / mL (final concentration 1 ⁇ g / mL).
- XT04 / SB04, XT04 / SB21, XT04 / SB42, XT04 / SB38, XT04 / SB30, XT04 / SB07, XT04 / SB05, XT04 / SB06, and XT04 / SB34 showed an increase in F.VIIIa-like activity.
- FIG. 6 shows the results of measuring the F.VIIIa-like activity of XB12 / SB04 having the highest activity in FIG. 4 at various concentrations. As a result, XB12 / SB04 showed a concentration-dependent increase in F.VIIIa-like activity.
- Figure 7 shows plasma coagulation time in the presence of XB12 / SB04, XB12 / SB21, XB12 / SB42, XB12 / SB38, XB12 / SB30, XB12 / SB07, XB12 / SB05, XB12 / SB06, and XB12 / SB34.
- the results of measuring (APTT) are shown.
- the concentration after mixing the antibody solution and F.VIII-deficient plasma is 1.7 ⁇ g / mL for XB12 / SB06, and 10 ⁇ g / mL for the others.
- FIG. 8 shows plasma coagulation time in the presence of XT04 / SB04, XT04 / SB21, XT04 / SB42, XT04 / SB38, XT04 / SB30, XT04 / SB07, XT04 / SB05, XT04 / SB06, XT04 / SB34.
- the result of measuring (APTT) is shown.
- the concentration after mixing the antibody solution and F.VIII-deficient plasma is 5 ⁇ g / mL for XT04 / SB06, and 10 ⁇ g / mL for the others.
- XT04 / SB04, XT04 / SB21, XT04 / SB42, XT04 / SB38, XT04 / SB30, XT04 / SB07, XT04 / SB05, XT04 / SB06 have a shorter coagulation time effect than in the absence of antibody. Indicated.
- FIG. 9 shows the results of measuring the coagulation time at various concentrations for XB12 / SB04, which had the highest effect of shortening the coagulation time (APTT) in FIG. 7 and FIG. As a result,
- XB12 / SB04 showed a coagulation time shortening effect in a concentration-dependent manner.
- the antibody concentration in the figure represents the value after mixing the antibody solution and F.VIII-deficient plasma.
- FIG. 10 shows the results of GST-AP western blotting of SB04 or SB06.
- the transcribed GST-AP was reacted with SB04, 2 with SB06, and 3 with a sample containing no antibody.
- a binding reaction with GST-AP was detected only in SB04.
- FIG. 11 is a diagram showing a pELBGlacI vector.
- ColElori ColEl-based plasmid replication initiation region
- flori fl phage replication initiation region
- lad ratatose repressor protein coding region
- P ratatose promoter
- pelBss E. coli PelB protein signal sequence
- ScFv single-chain antibody molecule coding region
- gene III fl phage Genelll protein coding region
- Amp 1 " ampicillin resistance gene
- Sfi I restriction enzyme Sfi I cleavage site.
- Figure 12 shows anti-F.IXa antibodies (A19, A25, A31, A38, A39, A40, A41, A44, A50, A69, XB12) and anti-F.X antibodies
- FIG. 13 shows anti-F.IXa antibodies (A19, A25, A31, A38, A39, A40, A41, A44, A50, A69, XB12) and anti-FX antibodies (B2, B5, B9, B10, B11). , B12, B13, B14, B15, B16, B18, B19, B20
- FIG. 14 shows the results of measuring the coagulation time at various concentrations for A44 / B26, which had a high effect of shortening the coagulation time (APTT) in FIG.
- the coagulation time without antibody addition is 113 seconds.
- A44 / B26 showed a coagulation time shortening effect in a concentration-dependent manner
- the antibody concentration in the figure indicates the value after mixing the antibody solution and F.VIII-deficient plasma.
- FIG. 15 shows the results of measuring the coagulation time at various concentrations for A69 / B26, which had a high effect of shortening the coagulation time (APTT) in FIG.
- the coagulation time without antibody addition is 109.6 seconds.
- A69 / B26 showed a coagulation time shortening effect in a concentration-dependent manner.
- the antibody concentration in the figure indicates the value after mixing the antibody solution and F.VIII-deficient plasma.
- Figure 16 shows plasma coagulation time in the coexistence of A44 / B26 or XB12 / SB04 and F.VIII
- FIG. 17 shows the results of measuring the clotting time (APTT) in inhibitor plasma in the presence of A44 / B26 or XB12 / SB04.
- A44 / B26 or XB12 / SB04 showed an effect of shortening the coagulation time as compared with the absence of the antibody.
- FIG. 18 shows the results of measuring the coagulation time at various concentrations for XB12 / SB04 and humanized XB12 / humanized SB04.
- the coagulation time without antibody addition is 111.3 seconds.
- Hitoi-Dani XB12 / Hitani-Dani SB04 showed the same effect of shortening the coagulation time as XB12 / SB04.
- the antibody concentration in the figure indicates the value after mixing the antibody solution and F.VIII-deficient plasma.
- BEST MODE FOR CARRYING OUT THE INVENTION [0012]
- the bispecific antibody (bispedfic antibody) in the present invention is a molecule comprising two types of antibodies or antibody fragments having specificities for different antigens. Bispecific antibodies are not particularly limited, but are preferably monoclonal.
- the bispecific antibody of the present invention is preferably a recombinant antibody produced using a gene recombination technique.
- a gene recombination technique for example, Borrebaeck CAK and Larrick JW, THER
- Recombinant antibodies are produced by cloning the DNA encoding them into hybridomas or antibody-producing cells such as sensitized lymphocytes that produce the antibodies, incorporating them into an appropriate vector, and introducing them into a host. Can be obtained by
- the antibody of the present invention may be an antibody fragment or a modified antibody thereof!
- Antibody fragments include diabodies (diabodies; Db), linear antibodies, single-chain antibody (hereinafter also referred to as scFv) molecules, and the like.
- Db diabodies
- scFv single-chain antibody
- the “Fv” fragment is the smallest antibody fragment and contains a complete antigen recognition and binding site.
- the “FV” fragment contains one heavy (H) chain variable region (V) and one light (L)
- V Chain variable region
- CDRs complementarity determining regions
- the Fab fragment (also called F (ab)) further contains a constant region of an L chain and a constant region (CH1) of an H chain.
- Fab ′ fragments differ from Fab fragments by having additional few residues from the carboxy terminus of the heavy chain CH1 region including one or more cystine from the antibody hinge region.
- Fab'-SH refers to Fab 'in which one or more cysteine residues in the constant region have a free thiol group.
- F (ab ') fragment is digested with F (ab') pepsin
- Diapod refers to a bivalent antibody fragment constructed by gene fusion. (Holliger P et al, Proc. Natl. Acad. Sci. USA 90: 6444-6448 (1993), EP404,097, W093 / 11161, etc.).
- a diabody is a dimer that is also composed of two polypeptide chain forces, each of which has an L chain variable region (V) and an H chain variable region (V) in the same chain.
- V and V encoded on the same polypeptide chain are single-chain due to the short linker between them
- the diapody will have two antigen binding sites.
- the single-chain antibody or scFv antibody fragment contains the V and V regions of the antibody.
- Fv polypeptides will additionally have V and
- the linker in the present invention is not particularly limited as long as it does not inhibit the expression of the antibody variable regions linked to both ends thereof.
- the IgG type bispecific antibody can be secreted by a hybrid hybridoma (quadroma) produced by fusing two hybridomas producing IgG antibodies (Milstein C et al. Nature 1983, 305: 537- 540).
- secretion can be achieved by co-expressing the genes of the L chain and H chain constituting the two types of desired IgG by introducing the genes into a total of four genes.
- Bispecific antibodies can also be prepared by cross-linking Fas in a strange manner. For example, Fab 'prepared from one antibody is maleimidated with 0-PDM (ortho-phenylenedi-maleimide), and the other antibody is reacted with the prepared Fa's. Cross-linking can produce bispecific F (a) (Keler T et al.
- leucine zippers derived from Fos, Jun, and the like can be used.
- Bispecific F (a) can be formed by mixing and reacting the monomer Fab'-Fos and Fab'-Jun reduced under mild conditions (Kostelny SA et al. J of
- Bispecific antibodies can also be prepared in diapody.
- the bispecific diabody is a heterodimer of two cross-over scFv fragments.
- V (A) -V (B) produced by linking V and V derived from the two antibodies ⁇ , ⁇ with a relatively short linker of about 5 residues, This can be achieved by constructing a heterodimer using V (B) -V (A) (Holliger P et al.
- sc (Fv) which can be produced by linking two types of scFvs with a flexible and relatively long linker of about 15 residues, can also be a bispecific antibody (Mallender WD et al. J of Biological
- modified antibody examples include an antibody bound to various molecules such as polyethylene glycol (PEG).
- PEG polyethylene glycol
- the substance to be bound is not limited.
- Such a modified antibody can be obtained by subjecting the obtained antibody to chemical modification.
- the origin of the antibody of the present invention is not limited, such as a human antibody, a mouse antibody, and a rat antibody.
- a target human antibody can be obtained by immunizing a transgenic animal having the entire repertoire of human antibody genes with a target antigen.
- WO 93/12227 See International Patent Application Publication Nos. WO 93/12227, WO 92/03918, WO 94/02602, WO 94/25585, WO 96/34096, WO 96/33735.
- a chimeric antibody is, for example, an antibody having the variable regions of the H chain and L chain of an antibody of an immunized animal and the constant region of the H chain and L chain of a human antibody.
- a chimeric antibody can be obtained by ligating DNA encoding the variable region of an antibody derived from an immunized animal to DNA encoding the constant region of a human antibody, inserting the DNA into an expression vector, and introducing into a host to produce the antibody. it can.
- a humanized antibody is a modified antibody also called a reshaped human antibody.
- a humanized antibody is constructed by grafting the CDR of an antibody derived from an immunized animal into the complementarity determining region of a human antibody. Its general genetic recombination technique is also known. [0031] Specifically, a CDR of a mouse antibody and a framework region of a human antibody (framework region;
- the DNA sequence designed to ligate FR is also synthesized by PCR using several oligonucleotides created to have overlapping portions at the ends.
- the obtained DNA is ligated to DNA encoding the constant region of a human antibody, then inserted into an expression vector, and introduced into a host to produce it (European Patent Application Publication No. EP 239400, International Patent Application Publication No. WO 96/02576).
- the human antibody FR linked via CDR is selected so that the complementarity-determining region forms a favorable antigen-binding site.
- amino acids in the framework regions in the variable region of the antibody may be substituted so that the complementarity determining region of the reshaped human antibody forms an appropriate antigen-binding site (Sato K et al, Cancer Research 1993). , 53: 851-856). Further, it may be replaced with a framework region derived from various human antibodies (see International Patent Application Publication No. WO 99/51743).
- the present invention provides a bispecific antibody that substitutes for the function of a cofactor that recognizes both an enzyme and a substrate for the enzyme.
- the cofactor in the present invention is not particularly limited as long as it can act on the enzyme and enhance the enzyme reaction.
- Examples of the cofactor in the present invention include a cofactor for a protease.
- Specific examples of cofactors for proteolytic enzymes include cofactors (F.VIII / F.VIIIa, FV / F.Va, PZ, TM, TM / PS system) in blood coagulation / fibrinolysis-related factors, and complement reaction.
- Cofactors (C4b, MCP, CR1, H factor) and the like can be mentioned.
- the cofactor F.VIIIa enhances FX activation by F.IXa by binding to both F.IXa and FX.
- Some of the bispecific antibodies that recognize both the enzyme RIXa and the substrate FX have an effect of enhancing the activity of FX. It is thought that some of these antibodies have a function to replace the function and function of cofactor F.VIII / F.VIIIa.
- B Example 2 of cofactor in blood coagulation / fibrinolysis-related factors
- the cofactor PZ enhances the F.Xa inhibitory activity of the ZPI by binding to the serpin family ZPI and the activated coagulation factor X (F.Xa). In other words, it is considered that among the bispecific antibodies that recognize both ZPI and F.X / F.Xa, those that have the function of substituting the function of PZ exist.
- Cofactor TM enhances TAFI activation by thrombin. That is, it is considered that among the bispecific antibodies recognizing both thrombin and TAFI, those having an action of substituting the function of TM exist.
- the TM / PS system enhances the activation of PC by thrombin.
- some bispecific antibodies that recognize both thrombin and PC may substitute for the function of the TM / PS system.
- the cofactor F.Va binds to both F.Xa and prothrombin, thereby promoting F.Xa Enhances the activity of rothrombin.
- bispecific antibodies that recognize both the enzyme F.Xa and the substrate prothrombin, there are those that have an action of enhancing prothrombin activation. It is considered that some of these antibodies have an action that substitutes for the action function of the cofactor FV / F.Va.
- C4b has the effect of promoting the decomposition of C2 by Cls. That is, it is considered that some bispecific antibodies that recognize both Cls and C2 substitute for the function of C4b.
- M-P Complement Regulatory Factor H Membrane Cofactor Protein
- Complement Regulatory Factor H, MCP and CRl have the effect of promoting C3b decomposition by Complement Regulatory Factor I. That is, it is considered that among the bispecific antibodies that recognize both Complement Regulatory Factor I and C3b, those that substitute for the functions of Complement Regulatory Factor H, MCP, and CRl exist.
- F.VIII / F.VIIIa is particularly preferred.
- F.VIII / F.VIIIa is subject to limited degradation by proteolytic enzymes such as thrombin, but in any form as long as it has F.VIII / F.VIIIa cofactor activity.
- mutations of F.VIII / F.VIIIa and F.VIII / F.VIIIa artificially modified by genetic recombination technology are also available as long as they have the F.VIII / F.VIIIa cofactor activity. Included in F.VIII / F.VIIIa.
- the method for obtaining the bispecific antibody alternative to the cofactor function of the present invention is not particularly limited, and may be obtained by any method.
- bispecific antibodies that substitute for cofactor function for enzyme A and substrate B immunize animals with enzyme A and substrate B, respectively, Obtain antibodies and anti-substrate B antibodies.
- a bispecific antibody containing the H chain and L chain of the anti-enzyme A antibody and the H chain and L chain of the anti-substrate B antibody is prepared.
- a plurality of types of anti-enzyme A antibodies and anti-substrate B antibodies are obtained, respectively, and it is preferable to use as many combinations as possible to produce bispecific antibodies.
- an antibody having a cofactor function-substituting activity is selected.
- An antibody against an enzyme or a substrate can be obtained by a method known to those skilled in the art.
- the antigen can be prepared by immunizing an immunized animal with an antigen.
- Antigens that immunize animals include intact antigens that are immunogenic and incomplete antigens that are not immunogenic (including haptens).
- an enzyme or a substrate which is considered to act as a cofactor by the cofactor function-substituting antibody of the present invention is used as the antigen (immunogen).
- an animal to be immunized for example, a mouse, a rat, a mouse, a muster, a guinea pig, a rabbit, a rabbit, a monkey or the like can be used. Immunization of these animals with an antigen can be carried out by those skilled in the art by well-known methods.
- variable regions of the L chain and the H chain of the immunized animal or the cell antibody of the animal are collected.
- This operation can be performed by those skilled in the art using generally known techniques.
- Animals immunized with an antigen express antibodies specifically to the antigen in spleen cells. Therefore, for example, mRNA can be prepared from spleen cells of an immunized animal, and the variable regions of the L and H chains can be recovered by RT-PCR using primers corresponding to the variable region of the animal.
- an animal is immunized with each of an enzyme and a substrate.
- the enzyme or substrate used as an immunogen may be the entire protein or a partial peptide of the protein.
- an immunogen used for immunizing an animal an antigen that can be an antigen may be bound to another molecule to provide a soluble antigen, or a fragment thereof may be used in some cases.
- Spleen strength of immunized mouse Splenocytes are isolated and fused with mouse myeloma cells to produce a hybridoma.
- Hybridomas that bind to the antigen are selected, and the variable regions of the L and H chains can be recovered by RT-PCR using primers corresponding to the variable regions.
- spleen cell mRNA of the immunized animal is extracted, and the cDNA of the L chain and H chain variable region is recovered by RT-PCR using primers corresponding to the vicinity of the variable region.
- lymphocytes can be immunized in vitro.
- a library displaying scFv or Fab is constructed.
- the antigen-binding antibody clone is enriched and cloned by Panjung to obtain a variable region.
- An antibody expression vector is prepared using the variable region.
- a bispecific antibody can be obtained by introducing an anti-enzyme antibody expression vector and an anti-substrate antibody expression vector into the same cell and expressing the antibody.
- Selection of an antibody having a cofactor function-substituting activity can be performed, for example, by the following method.
- the enzyme is selected by using a reaction system containing the substrate and using the increase in the enzyme activity (substrate resolution) caused by adding the antibody as an index.
- the obtained antibody can be purified to homogeneity.
- the separation and purification of the antibody may be performed by the separation and purification methods used for ordinary proteins. For example, if appropriate selection and combination of chromatography columns, filters, ultrafiltration, salting-out, dialysis, SDS polyacrylamide gel electrophoresis, isoelectric focusing, etc. (Ant3 ⁇ 4odies: A Laboratory Manual. Ed Harlow and David Lane, Cold Spring Harbor Laboratory, 1988). Columns used for affinity chromatography include a protein A column and a protein G column.
- the bispecific antibody of the present invention can be obtained, for example, when the alternative cofactor is F.VIII / F.VIIIa, that is, the combined power of an enzyme and a substrate.
- the alternative cofactor is F.VIII / F.VIIIa
- it preferably has a structure including a variable region in an anti-F.IXa antibody and a variable region in an anti-FX antibody.
- the F.VIII / F.VIIIa function-substituted bispecific antibody of the present invention was prepared by the following method. Mice were immunized subcutaneously with commercially available F.IXa and F.X, respectively. Spleen strength of immunized mice with increased antibody titer Splenocytes were isolated and fused with mouse myeloma cells to produce hybridomas. Hybridomas that bind to the antigen (F.IXa, F.X) were selected, and the variable regions of the L and H chains were recovered by RT-PCR using primers corresponding to the variable regions.
- the L chain variable region should be a C-containing L chain expression vector
- the H chain variable region should be a H chain expression region containing a H chain constant region.
- the measurement also includes F.XIa (F.IX-activating enzyme), a synthetic substrate of F.IX, FX, F.Xa (S-2222), and phospholipid power.
- F.XIa F.IX-activating enzyme
- the system was evaluated for its activity to replace F.VIII / F.VIIIa (a cofactor for FX activation by F.IXa).
- F.VIII / F.VIIIa a cofactor for FX activation by F.IXa
- the F.VIIIa-like activity referred to here is the change in the absorbance of the antibody solution or antibody-expressing culture supernatant for 30 or 60 minutes from the change in the absorbance of the solvent or antibody-free culture supernatant for 30 or 60 minutes. This is the value obtained by subtracting the value.
- the coagulation recovery ability was measured using a coagulation time measurement system using F.VIII-deficient human plasma.
- a bispecific antibody having a shorter clotting time than that when no antibody was added was obtained.
- the clotting time is, as shown in Example 7, a value obtained by measuring the activated thrombus thromboplastin time using F.VIII-deficient human plasma.
- a preferred bispecific antibody is 10 seconds or more, and a more preferred bispecific antibody is 20 seconds or more.
- the bispecific antibody was more preferred than 40 seconds, and the bispecific antibody was capable of shortening the coagulation time of 50 seconds or more.
- the H chain CDR3 of the antibody of the present invention is not particularly limited, but specifically, ⁇ 12, ⁇ 04, ⁇ 19, ⁇ 25, ⁇ 31, ⁇ 38, ⁇ 39, ⁇ 40, ⁇ 41, ⁇ 44, described in Examples described later. ⁇ ⁇ ⁇ ⁇ 50 or ⁇ 69 ⁇ chain CDR3 sequence (SEQ ID NO: 16, 20, 60, 64, 68, 72, 76, 80, 84, 88, 92 or 96), the complementarity of amino acid sequence Having a decision region or a complementarity-determining region functionally equivalent thereto and having SB04, SB05, SB06, SB07, SB21, SB30, SB34, SB38, SB42, B2, B5, B9, B10, Bll, B12, H3 CDR3 sequence of B13, B14, B15, B16, B18, B19, B20, B21, B23, B25, B26, B27, B31, B34-1, B34-2, B35, B
- the above-mentioned antibody of the present invention specifically includes, for example, ⁇ 12, ⁇ 04, ⁇ 19, ⁇ 25, ⁇ 31, ⁇ 38, ⁇ 39, ⁇ 40, ⁇ 41, ⁇ 44, ⁇ 50, or ⁇ 69 (SEQ ID NOS: 14-16, 18- 20, 58--60, 62-64, 66-68, 70-72, 74-76, 78-80, 82-84, 86-88, 90-92 or 94-96) Or having a complementarity-determining region consisting of any of the following amino acid sequences or a functionally equivalent complementarity-determining region: SB04, SB05, SB06, SB07, SB21, SB30, SB34, SB38, SB42, B2, B5, B9, B10, Bll, B12, B13, B14, B15, B16, B18, B19, B20, B21, B23, B25, B26, B27, B31, B34—1, B34
- amino acid sequence of the light chain variable region of A44, B26, XB12, and SB04 according to the present invention is SEQ ID NO:
- L chain CDR sequences of A44, B26, XB12, and SB04 are represented by SEQ ID NOs: 206-208, 210-212, 214-216, 218-220.
- nucleotide sequences of the heavy chain CDRs of XB12, SB04, A44 and B26 are shown in SEQ ID NOs: 221 (222), 223 (224), 225 (226), 233 (234), 235 (236), 237 (238), 245 (246), 247 (248), 249 (250), 257 (258), 259 (260), 261 (262), L
- the nucleotide sequences of the chain CDRs are represented by SEQ ID NOs: 227 (228), 229 (230), 231 (232), 239 (240), 241 (242), 243 (244), 251 (252), 253 (25 4 ), 255 (256), 263 (264), 265 (266), and 267 (268).
- SEQ ID NO: 60, 64, 68, 72, 76, 80, 84, 88, 92, 96, 100, 104, 108, 112, 1 16, 120, 124, 128, 132, 136, 140, 144 , 148, 152, 156, 160, 164, 168, 172, 176, 180, 184, 188, 192, 196, 200, 204, 208, 212, 216, 220, 226, 232, 238, 244, 250, 256, 262, 268 represent CDR3.
- the antibody of the present invention is not particularly limited, but is preferably an antibody having the same or close epitopes as the above-mentioned antibodies, and includes bispecific antibodies in combination with an anti-Factor IXa antibody and an anti-Factor X antibody.
- the antibody having the same or nearby epitope refers to, for example, an antibody whose binding is antagonized by competitive ELISA or the like.
- the method of this competitive ELISA is not particularly limited, but Factor IX / IXa or Factor X is immobilized on a 96-well microwell plate, and the appropriately labeled antibody and the antibody to be evaluated are simultaneously added. The bound antibody is detected using the label.
- the label is not particularly limited, and examples thereof include alkaline phosphatase label, peroxidase label, streptavidin-linked enzyme having a biotin label (such as alkaline phosphatase and peroxidase), and FITC.
- Epitope overlap is present if there is at least 50% competition for the antibody at concentrations up to a 100,000-fold excess of the antibody to be evaluated.
- the constant region is not particularly limited, and a constant region known to those skilled in the art can be used.
- proteins of immunological interest (1991), Ub Department of Health and Human Services.Public Health Service National Institutes of Health, An efficient route to human bispecific IgG, (1998) .Nature Biotechnology vol. 16, 677-681, etc.
- the constant region described in can be used.
- the antibody of the present invention since the antibody of the present invention has an action of substituting the function of a cofactor, the antibody of the present invention can be used for a disease caused by reduced activity (function) of the cofactor. Therefore, it is expected to be an effective drug.
- the cofactor that substitutes for the antibody of the present invention is a blood coagulation / fibrinolysis-related factor
- examples of the disease include bleeding, diseases associated with bleeding, and diseases caused by bleeding.
- F.VIII / F.VIIIa examples of the disease include bleeding, diseases associated with bleeding, and diseases caused by bleeding.
- F.IX / F.IXa and F.XI / F.XIa is known to cause a bleeding disorder called hemophilia.
- hemophilia a bleeding abnormality due to congenital F.VIII / F.VIIIa hypofunction or deficiency is called hemophilia A. If hemophilia A bleeds, F.VIII replacement therapy is given It is. Also, on the day of intense exercise or excursion, if joint bleeding occurs frequently, or if the patient is classified as severe hemophilia, prophylactic administration of an F.VIII preparation may be performed (Non-Patent Documents 1 and 2). 2). In recent years, this prophylactic administration of F.VIII preparations has become widespread in order to drastically reduce bleeding episodes in patients with hemophilia A.
- the F.VIII preparation is administered intravenously.
- an antibody against F.VIII called an inhibitor may develop in a hemophilia A patient, particularly in a severe hemophilia A patient. If an inhibitor develops, the potency of the F.VIII preparation will be hampered by the S inhibitor. As a result, hemostasis management for patients becomes very difficult.
- bleeding disorders related to F.VIII / F.VIIIa include hemophilia, acquired hemophilia having anti-F.VIII autoantibodies, and abnormal or defective vWF function.
- Vonville brand disease is known.
- vWF forms a complex with F.VIII that is not only necessary for normal adhesion to the subendothelial tissue at the site of injury to the vascular wall, but also to maintain normal F.VIII levels in plasma. is necessary. In patients with von Willebrand disease, these functions are impaired, leading to abnormal hemostasis.
- the present invention provides a pharmaceutical composition containing the antibody of the present invention as an active ingredient.
- the antibody of the present invention is an antibody that recognizes both F.IX or F.IXa and FX, and that substitutes for the function of F.VIIIa
- the antibody can prevent bleeding and bleeding. It is expected to be a drug (pharmaceutical composition) or drug for the prevention or treatment of associated diseases or diseases caused by bleeding.
- the antibody substitutes for the function of F.Va the antibody may be caused by bleeding, a disease involving bleeding, or bleeding. It is expected to be a drug (pharmaceutical composition) or drug for the prevention or treatment of the disease.
- an antibody that binds to ZPI and FX and substitutes for the function of PZ is a drug (pharmaceutical composition) or drug having an antithrombotic action, or an antibody that binds to thrombin and TAFI to substitute for the function of TM.
- the body is a drug (pharmaceutical composition) or drug that promotes hemostasis
- an antibody that binds to thrombin and PC and replaces the function of the PS / TM system is a drug (pharmaceutical composition) or drug that has a coagulation regulating action It is expected.
- an antibody that substitutes for the action of C4b is expected to be a drug (pharmaceutical composition) or drug having an SLE onset suppression effect. Is done. Since deficiency of factor H causes diarrhea infection and autoimmune glomerulonephritis, an antibody that substitutes for the action of factor H has a drug (pharmaceutical composition) or drug that has an action to suppress the onset of these diseases Is expected.
- compositions containing the antibody of the present invention as an active ingredient and used for therapeutic or prophylactic purposes may, if necessary, contain suitable pharmaceutically acceptable carriers and media which are inactive against them. And can be formulated into a formulation. For example, sterile water or saline, stabilizers, excipients, antioxidants (ascorbic acid, etc.), buffers (phosphoric acid, citric acid, other organic acids, etc.), preservatives, surfactants (PEG , Tween, etc.), chelating agents (EDTA, etc.), binders and the like.
- polypeptides such as serum albumin, gelatin and immunoglobulin, amino acids such as glycine, glutamine, asparagine, arginine and lysine, sugars such as polysaccharides and monosaccharides, carbohydrates, mannitol and sorbitol And the like.
- aqueous solution for injection for example, physiological saline
- isotonic solution containing glucose and other auxiliary agents for example, D-sorbitol, D-mannose, D -man-tol, sodium salt and sodium salt
- auxiliary agents for example, D-sorbitol, D-mannose, D -man-tol, sodium salt and sodium salt
- a suitable solubilizing agent such as alcohol (eg, ethanol), polyalcohol (eg, propylene glycol, PEG), and a nonionic surfactant (eg, polysorbate 80, HCO-50).
- the antibody of the present invention may be encapsulated in microcapsules (microcapsules such as hydroxymethylcellulose, gelatin, polymethylmethacrylic acid), or may be used in a colloid drug delivery system (ribosome, albumin microsphere, microcapsule). Emulsions, nanoparticles, nanocapsules, etc.) (see “Remington's Pharmaceutical Science 16th edition", Oslo Ed. (1980), etc.).
- a method for making a drug a sustained-release drug is also publicly available. And is applicable to the antibodies of the present invention (Langer et al., J. Biomed. Mater.Res. 15:
- the antibody or pharmaceutical composition of the present invention can be used in combination with blood coagulation factor vm.
- the antibody or the pharmaceutical composition of the present invention may be administered simultaneously with blood coagulation factor vm, or may be administered staggered.
- the kit may be implemented as a kit in which the antibody or the pharmaceutical composition of the present invention is combined with blood coagulation factor VIII.
- the dose of each can be reduced as desired, as compared with the case where any of them is used alone. .
- the dose of the pharmaceutical composition of the present invention is ultimately determined by a physician in consideration of the type of dosage form, the administration method, the age and weight of the patient, the symptoms of the patient, the type of disease, and the degree of progress. Power that can be appropriately determined according to the judgment in general In general, for adults, 0.1 to 2000 mg per day can be administered in several divided doses. More preferably, it is 110 mg / day, even more preferably 50 to 500 mgZ days, most preferably 100 to 300 mgZ days. These dosages vary depending on the patient's body weight, age, administration method, and the like, but those skilled in the art can appropriately select appropriate dosages.
- the administration period is also preferably determined appropriately according to the healing process of the patient.
- the administration methods include direct administration using naked plasmid, and various methods such as retrovirus vector, adenovirus vector, vaccinia virus vector, box virus vector, adenovirus-related vector, HVJ vector, etc. It can be administered as a viral vector (see Adolph "Virus Genome Method", CRC Press, Florid (1996)), or coated on a bead carrier such as colloidal gold particles (WO93 / 17706, etc.).
- the antibody may be administered by any method as long as the antibody is expressed in the living body while exerting the action and the action can be exerted.
- injection, infusion, or gas-induced particle bombardment via a suitable non-transparent P route intravenous, intraperitoneal, subcutaneous, intradermal, adipose tissue, adipose tissue, (Electron gun Etc.), a method via a mucosal route such as a nasal drop, etc.
- the present invention is achieved by ex vivo administration to blood cells and bone marrow-derived cells using ribosome transfection, particle bombardment (US Pat. No. 4,945,050), or viral infection, and reintroducing the cells into animals. May be administered.
- any gene encoding the antibody of the present invention can be used, and examples thereof include the genes containing the nucleotide sequences of the aforementioned CDRs of XB12, SB04, A44 and B26.
- the present invention also provides a method for preventing and / or treating bleeding, a disease associated with bleeding, or a disease caused by bleeding, comprising a step of administering the antibody or the composition of the present invention.
- Administration of the antibody or the composition can be performed, for example, by the method described above.
- the present invention also relates to the use of the antibody of the present invention for producing the (pharmaceutical) composition of the present invention.
- the present invention further provides a kit for use in the above method, comprising at least the antibody or the composition of the present invention.
- the kit may be packaged with a syringe, a needle, a pharmaceutically acceptable medium, an alcohol swab, an adhesive bandage, or instructions describing the method of use.
- Factor IXa ⁇ emulsified with FIA Factor IXa ⁇ emulsified with FIA (Freund's incomplete adjunction (Difco laboratories)) was subcutaneously administered at 40 ⁇ g / head. Thereafter, booster immunizations were performed 3 to 7 times at weekly intervals. After confirming the increase in serum antibody titer against Factor IXa by ELISA (Enzyme linked immunosorbent assay) shown in 1-2, Factor diluted in PBS (-) (phosphate buffered saline without calcium and magnesium ions) as final immunity IXa ⁇ was administered intravenously at 40 ⁇ g / head.
- ELISA Enzyme linked immunosorbent assay
- the spleen of the mouse was excised, a part of which was used in Example 10-2, and the remaining spleen cells and mouse myeloma cells P3X63Ag8U.l (P3Ul, ATCC CRL-1597) were added to PEG 1500
- the cells were fused according to a conventional method using (Roche Diagnostics).
- the fused cells suspended in RPMI1640 medium (Invitrogen) containing 10% FBS (Invitrogen) (hereinafter referred to as 10% FBS / RPMI1640) were seeded on a 96-well culture plate, and 1, 2, 3, and 5 days after fusion.
- HAT selection medium (10% FBS / RPMI1640 / 2% HAT 50x concentrate (Dainippon Pharmaceutical) / 5%
- hybridomas By substituting with BM-Condimed HI (Roche's Diagnostics), selective culture of hybridomas was performed. Using the culture supernatant collected on the 8th or 9th day after the fusion, the binding activity to Factor IXa was measured by the ELISA shown in 1-2 to select a hybridoma having Factor IXa binding activity. Subsequently, the neutralizing activity on the enzyme activity of Factor IXa was measured by the method described in 1-3, and a hybridoma having no neutralizing activity on Factor IXa was selected. The hybridomas were cloned by limiting dilution twice by inoculating one cell per well in a 96-well culture plate.
- the cells confirmed to be a single colony by microscopic observation were subjected to ELISA and neutralization activity measurement shown in 1-2 and 1-3, and clones were selected. According to the method described in 1-4, ascites of the cloned antibody was prepared, and the antibody was purified from the ascites. It was confirmed by the method shown in 1-5 that the purified antibody did not prolong APTT (active thrombopartial thromboplastin time).
- the plate was blocked with Tween (R) 20, 0.02% sodium azide) at room temperature for 2 hours. After removing the buffer, 100 ⁇ L / well of the mouse antiserum or hybridoma culture supernatant diluted with the diluent buffer was added to the plate and incubated at room temperature for 1 hour. After the plate was washed three times, 100 ⁇ l / well of alkaline phosphatase-labeled goat anti-mouse IgG (H + L) (Zymed Laboratories) diluted 1/2000 with a diluent buffer was added, and incubated at room temperature for 1 hour.
- Phospholipid (Sigma-Aldrich) was dissolved in distilled water for injection and subjected to ultrasonic treatment to prepare a 400 g / mL phospholipid solution.
- the ascites of the established hybridoma was prepared according to a conventional method.
- 2 ⁇ 10 6 Ibridomas cultivated in vitro were bred into Pristane ( BALB / c mice to which 2,6,10,14-tetramethylpentadecane (Wako Pure Chemical Industries, Ltd.) was intraperitoneally administered twice (male, 5-7 weeks old at the start of the experiment, Nippon Chillers' Riva-1)
- BALB / c nude mice female, 5-6 weeks old at the start of the experiment, Nippon Chillers' Liver and Clea Japan
- ascites was also collected from the mouse whose abdomen was enlarged.
- APTT was measured by KClOA (Amelung) connected to CR-A (Amelung).
- the coagulation reaction was started by adding ⁇ L to the same mixture, and the coagulation time was measured.
- Factor X diluted in PBS (-) was intravenously administered at 20 or 40 ⁇ g / head as final immunity.
- the spleen of the mouse was excised, a part of which was used in Example 10-2, and the remaining spleen cells and mouse myeloma cells P3U1 were subjected to a conventional method using PEG1500. Cells were fused according to the procedure described above.
- the hybridoma cells were seeded in a 96-well culture plate and suspended in 10% FBS / RPMI1640 medium.After 1, 2, 3, and 5 days after the fusion, the hybridoma was selectively cultured by replacing with a HAT selection medium. . Using the culture supernatant collected on day 8 after the fusion, the binding activity to Factor X was measured by ELISA shown in 2-2. Hybridomas having Factor X binding activity were selected, and the neutralizing activity of Factor Xa on enzyme activity was measured by the method described in 2-3. Hybridomas without neutralizing activity against Factor Xa were cloned by performing two limiting dilutions. According to the method described in 1-4, ascites of the cloned antibody was prepared, and the antibody was purified from the ascites. It was confirmed by the method shown in 2-5 that the purified antibody did not extend APTT.
- Factor X was dispensed into Nunc-Immuno plate at 100 ⁇ L / well and incubated at 4 ° C. After washing three times with PBS (-) containing Tween (R) 20, the plate was blocked with a diluent buffer at room temperature for 2 hours. After removing the Buffer, the plate was supplemented with mouse antiserum or hybridoma culture supernatant diluted with diluent buffer, and incubated at room temperature for 1 hour.
- Substrate (Kirkegaad & Perry Laboratories) was added with 100 ⁇ L / well, and incubated at room temperature for 20 minutes. After adding 100 ⁇ L / well of Blue-Phos Stop Solution (Kirkegaad & Perry Laboratories), the absorbance at 595 nm was measured with Microplate Reader Model 3550 (Bio-Rad Laboratories).
- TBCP (2.78 mM CaCl, 22.2 ⁇ M phospholipid containing 10 ⁇ L of the hybridoma culture supernatant diluted 1/5 with TBSB and 40 ⁇ L of 250 pg / mL Factor Xa (Enzyme Research Laboratories)
- RNA was extracted according to the method of instructions described using QIAGEN (R) RNeasy (R) Mini Kit (QIAGEN). Total RNA was dissolved in 40 ⁇ L of sterile water. A single-stranded cDNA was synthesized by RT-PCR using 1-2 ⁇ g of the purified RNA in the form of ⁇ using a Superscript cDNA synthesis system (Invitrogen) according to the method described in the instruction manual.
- PCR is a thermal cycler
- condition A After heating at 98 ° C for 3 minutes, 98 ° C 20 seconds, 58 ° C 20 seconds, 72 ° C 32 cycles of a reaction consisting of 30 seconds as one cycle) or Condition B (heating at 94 ° C for 3 minutes, followed by a reaction of 94 ° C for 20 seconds, 46 ° C for 20 seconds, and 68 ° C for 30 seconds as one cycle) 5 cycles, and 30 cycles of a reaction consisting of 94 ° C for 20 seconds, 58 ° C for 20 seconds, and 72 ° C for 30 seconds). After PCR, the reaction solution was subjected to 1% agarose gel electrophoresis.
- the amplified fragment of the desired size (about 400 bp) was purified using the QIAquick Gel Extraction Kit (QIAGEN) according to the method described in the attached instruction manual, and eluted with sterile water 301. Use the BigDye Terminator and the Ycle Sequencing Kit (Applied Biosystems) to determine the base sequence of each DNA fragment.Use the ABI PRISM 3100 Genetic Analyzer (Applied Biosystems) with the DNA Determined according to the law. The sequence groups determined by this method were compared and analyzed using the analysis software GENETYX-SV / RC Version 6.1 (Genetyx), and those having different sequences were selected.
- the following operation was performed in order to add a restriction enzyme SfiI cleavage site for cloning to both ends of the amplified fragment of the antibody variable region.
- PCR was carried out using a thermal cycler GeneAmp PCR system 9700 (Parkin Elmer) according to the efficiency of fragment amplification according to condition A (heating at 98 ° C for 3 minutes, 98 ° C for 20 seconds, and 58 ° C for 20 seconds.
- the amplified fragment of the target size (about 400 bp) was purified using a QIAquick Gel Extraction Kit (QIAGEN) according to the method described in the attached instruction manual, and eluted with 30 ⁇ L of sterile water.
- QIAGEN QIAquick Gel Extraction Kit
- DNA polymerase KODplus 0.75 units DNA polymerase KODplus (Toyobo) was prepared. PCR was performed using a thermal cycler GeneAmp PCR system 9700 (Parkin Elmer), after heating at 94 ° C for 3 minutes, 94 ° C for 20 seconds, 46 ° C for 20 seconds, and 68 ° C according to the efficiency of fragment amplification. 5 cycles of a reaction consisting of 30 seconds per 1 cycle, and 1 cycle of a reaction consisting of 94 ° C 20 seconds, 58 ° C 20 seconds, and 72 ° C 30 seconds The cycle was performed under the condition of 30 cycles. After PCR, the reaction solution was subjected to 1% agarose gel electrophoresis.
- the amplified fragment of the target size (about 400 bp) was purified using a QIAqucick Gel Extractio Kit (QIAGEN) according to the method described in the attached instruction manual, and eluted with 30 L of sterile water.
- the fragment has a (Gly4Ser) 3-linker sequence derived from the primer LF added to its C-terminal.
- the (Gly4Ser) 3-linker sequence of primer LF was changed to a sequence having an SfiI cleavage site (SEQ ID NO: 6) (primer VL -3 'end).
- PCR was performed at 94 ° C for 3 minutes using a thermal cycler GeneAmp PCR system 9700 (Parkin Elmer), followed by one cycle of a reaction consisting of 94 ° C for 20 seconds, 46 ° C for 20 seconds, and 68 ° C for 30 seconds. The reaction was performed under the conditions of 5 cycles, and a cycle of 94 ° C for 20 seconds, 58 ° C for 20 seconds, and 72 ° C for 30 seconds as one cycle. After PCR, the reaction solution was subjected to 1% agarose gel electrophoresis. Amplified fragment of desired size (approx. 400 bp) with QIAquick Gel
- HL molecule one arm of each specific antibody molecule (referred to as HL molecule) is expressed separately, and corresponding to each HL molecule in order to efficiently produce the target bispecific IgG antibody in the cell.
- the expression vector used was a different drug with an inducing force of S.
- the tetracycline-inducible vector p C DNA4 (Invitrogen) was used for the respective regions of the H chain! (Fig. 2), that is, an appropriate mouse antibody variable region (VH or VL) and a human HgG4 ya constant region downstream of the animal cell signal sequence (IL3ss) (Proc. Natl. Acad. Sci. USA. 1984; 81: 1075).
- IL3ss animal cell signal sequence
- pcDNA4 was digested with restriction sites Eco RV and Not 1 (Takara Bio) present in the multicloning site.
- a chimeric bispecific antibody having an appropriate antibody variable region, a right arm H chain and an L chain expression unit (each about 1.6 kb to about 1.0 kb, respectively) were digested with Xho1 (Takara Bio), and then QIAquick
- the product was purified using the PCR Purification Kit (QIAGEN) according to the method described in the attached manual, and allowed to react with DNA polymerase KOD (Toyobo) in the reaction solution composition described in the attached manual at 72 ° C for 10 minutes to blunt the ends. .
- the blunt-ended fragment was purified using the QIAquick PCR Purification Kit (QIAGEN) according to the method described in the attached instruction manual, and digested with Not 1 (Takara Bio).
- the Not I-blunt fragment (each about 1.6 kb to 1.0 kb) and pcDNA4 digested with the Eco RV-Not I were ligated using Ligation High (Toyobo) according to the method described in the attached instruction manual.
- Escherichia coli DH5 ⁇ strain (Competent high DH5a (Toyobo)) was transformed with the reaction solution. Plasmid DNA was isolated from each of the ampicillin metastatic clones using QIAprep Spin Miniprep Kit (QIAGEN).
- the other arm (referred to as the left arm HL molecule for the sake of convenience) is connected to the etadysone analog-inducible vector pIND (Invitrogen) by each of the H or L chains ( Figures 2 and 3), ie, the signal for animal cells.
- pIND etadysone analog-inducible vector
- Figures 2 and 3 the signal for animal cells.
- a suitable mouse antibody variable region (VH or VL) and a human IgG4 yb constant region (SEQ ID NO: 9) downstream of the sequence (IL3ss) (EMBO. J. 1987; 6: 2939) (SEQ ID NO: 8) were incorporated (pIND-g4H! And pIND-g4L) according to the method described above, and each plasmid DNA was isolated.
- 3-5 Construction of bispecific antibody expression vector
- the tetracycline-inducible expression plasmid (PCDNA4-g4H or pcDNA4-g4L) prepared in 3-4 was digested with SfiI, and the reaction solution was subjected to 1% agarose gel electrophoresis. Using the QIAquick Gel Extraction Kit (QIAGEN), a fragment (about 5 kb) from which the antibody variable region portion (VH and VL (see FIGS. 1 and 2)) was originally removed was used. Purified by the method described in the attached manual, and eluted with 30 L of sterilized water.
- PCR was performed at 96 ° C for 1 minute using a thermal cycler GeneAmp PCR system 9700 (Parkin Elmer), followed by one cycle of a reaction consisting of 96 ° C for 10 seconds, 55 ° C for 10 seconds, and 72 ° C for 30 seconds. The reaction was performed under the conditions of 30 cycles of reaction. After PCR, subject the reaction solution to 1% agarose gel electrophoresis, The clone from which the amplified fragment was obtained was selected. The PCR product was subjected to excess primer and inactivation of dNTPs using ExoSAP-IT (Amersham Biosciences) according to the attached instructions.
- the nucleotide sequence of each DNA fragment was determined using a BigDye Terminator Cycle Sequencing Kit (Applied Biosystems) and a DNA sequencer ABI PRISM 3100 Genetic Analyzer (Applied Biosystems) according to the method described in the attached manual.
- the sequence groups determined by this method are analyzed with the analysis software GENETYX-SV / RC Version 6.1 (Genetyx), and the target clone containing no insertion / deletion mutation for VH and the hybridoma for VL are used.
- the target clone was selected, which had insertion deletion mutations and the like and had a V ⁇ .
- Plasmid DNAs were isolated from the target clones using the QIAprep Spin Miniprep Kit (QIAGEN), and dissolved in 100 L of sterilized water.
- Anti-F.IXa antibody chimeric H chain expression vector, anti-F.IXa antibody chimeric L chain expression vector, anti-FX antibody chimeric H chain expression vector, and anti-FX antibody chimeric L chain expression vector respectively, pcDNA4-g4IXaHn, pcDNA4-g4IXaLn , PIND-g4XHn and pIND-g4XLn. Each plasmid solution was stored at 4 ° C until use.
- Antibody right arm HL molecule expression vectors (pcDNA4-g4IXaHn and pcDNA4-g4IXaLn) are induced by tetracycline. In the absence of tetracycline, plasmid pcDNA6 / TR (Invitrogen) encoding the Tet repressor is required to completely suppress expression under certain circumstances.
- the expression of the HL molecule expression vector (pIND_g4XHn and PIND-g4XLn) for the left arm of the antibody is induced by an etadysone analog (ponasterone A), which is an insect hormone.
- a plasmid pVgRXR (Invitrogen) encoding an etadysone receptor which reacts with and induces bonasterone A and a retinoid X receptor is required. Accordingly, a total of six types of plasmid DNA mixtures were prepared for transfection of animal cells. For 1 mL of cell culture, 218.8 ng each of pcDNA4-g4IXaHn, pcDNA4-g4IXaLn, pIND-g4XHn and pIND-g4XLn, and 1312.5 ng each of pcDNA6 / TR and pVgRXR were used.
- CHO-S-SFM-II medium After washing with CHO-S-SFM-II medium, add 1 mL CHO-S-SFM-II medium containing 5 ⁇ of ponasterone A (Invitrogen), and incubate in a CO incubator (37 ° C
- the secondary expression of the HL molecule on the left arm of the antibody was induced, and the bispecific IgG antibody was secreted into the medium.
- the culture supernatant was collected, centrifuged (approximately 2000 g, 5 min, room temperature) to remove the cells, was concentrated as necessary by Microcon (R) YM- 50 (Millipore ). The samples were stored at 4 ° C until use.
- the F.VIIIa-like activity of the bispecific antibody was evaluated using the following enzyme assay. The following reactions were all performed at room temperature. A mixture of 40 ⁇ L of 3.75 ⁇ g / mL Factor IX (Enzyme Research Laboratories) and 10 ⁇ L of the antibody solution was incubated in a 96-well plate for 1 hour. Furthermore, 10 ng / mL of Factor XIa (Enzyme Research Laboratories) 10 ⁇ L, 50 ⁇ g / mL of Factor X (Enzyme Research Laboratories) 20 ⁇ L, 400 ⁇ g / mL of phospholipid (Example) TBSB containing 5 L, 5 mM CaCl and ImM MgCl
- the enzyme reaction was started by adding 15 / zL. After reacting for 30 minutes, the reaction was stopped by adding 10 ⁇ L of 0.5 M EDTA.
- the absorbance at 405 nm (reference wavelength 655 nm) at 0 and 30 minutes was measured using a Model 3550 Microplate Reader (Bio Rad Loboratories).
- the F.VIIIa-like activity was represented by the value obtained by subtracting the change in absorbance for 30 minutes without the antibody from the change in absorbance for 30 minutes with the addition of the antibody (see FIGS. 4 and 5).
- the solvent for Phospholipid was TBSB, and the solvent for Factor XIa, Factor IX, and Factor X was TBSB-S.
- the chromogenic substrate solution is a 1: 1 mixture of test team chromogenic substrate S-2222 (Chromogenix) and polybrene solution (0.6 mg / L hexadimethrine bromide (Sigma;)) dissolved according to the attached instructions.
- the suspension was suspended in 10 mM HC1, pH 2.0 containing 0.01% Tween (R) 20, and allowed to stand for 3 minutes, after which the antibody was eluted. Immediately, 5 ⁇ L of 1 M Tris-HCl, pH 8.0 was used to neutralize the mixture. Using a Microplate Manager III (Bio-Rad Laboretories) software, the concentration of human HgG in the culture supernatant of the standard calibration curve was calculated. The antibody concentration was determined according to Example 5.
- a recombinant Escherichia coli expressing a fusion protein (GST-AP) of F.X activating peptide (AP) and glutathione S-transferase (GST) was constructed.
- a cDNA covering the full-length translation region of human FX is amplified by PCR from human liver Marathon-Ready cDNA (Clontech), and this is further transformed into a type II to encode the AP region (Leytus et al., Biochemistry 1986; 25: 5098).
- the region to be amplified was amplified by PCR and subcloned into a pGEM-T vector (Promega) to obtain pGEX-F10AP encoding GST-AP.
- the culture was centrifuged (3,000 xg, 30 minutes, 4 ° C), and the cells were collected and stored at -20 ° C until use.
- SDS-PAGE sample buffer (IWAKI) was prepared at 2.4 mL and boiled at 95 ° C for 5 minutes. 10 ⁇ L of the reaction solution was added to each gel of SDS-PAGE mini (14%) gel (Asahi Techno Glass), and electrophoresis was performed. The gel after electrophoresis was transferred to Immobilon-P TM Transfer Membrane (MILLIPORE) using a semi-dry blotter (BIO-RAD), and BT-PBS (2% BSA And 0.05% Tween (R) 20 in PBS). After blocking was completed, the anti-FX mouse antibody SB04 or SB06 purified in Example 14 was reacted with BT-PBS diluted to 2 ⁇ g / mL for 1 hour.
- Example 10 Obtaining bispecific antibody from scFv library derived from immunized mouse spleen 10-1. Antigen and immunity
- mice Male, 6 weeks old at the start of immunization, Nippon Charles Riva
- MRL / lpr mice male, 6 weeks old at the start of immunization, 3 Nippon Charles Riva
- C57BL / 6N mice Male, 6 weeks old at the start of immunization, Nippon Charles' Liver
- FCA complete Freund's adjuvant H37 Ra (Difco laboratories)
- FIA Complete Freund's adjuvant (Incomplete Freund's adjuvant (Difco laboratories)
- primers for amplifying mouse antibody heavy chain variable region (VH) and light chain variable region (VL) cDNAs a mixture of HB primer and HF primer used in Examples 3-2 and 3-3 were used.
- the LB ply mixture and the LF ply mixture were prepared.
- the reaction solution 50 i u L cDNA solution 2.5 ⁇ 1 KOD plus buffer (TOYOBO), 0.2 mM dNTPs, 1.5 mM MgCl, 3.75 units DNA polymerase KOD plus (Toyobo) was prepared.
- TOYOBO cDNA solution 2.5 ⁇ 1 KOD plus buffer
- TOYOBO 0.2 mM dNTPs
- 1.5 mM MgCl 3.75 units DNA polymerase KOD plus
- reaction mixture 50 L having the same composition as described above was prepared.
- PCR was performed using a SalCycler GeneAmp PCR system 9700 (Parkin Elmer), followed by calorific heat at 98 ° C for 3 minutes, followed by 98 ° C for 20 seconds, 58 ° C for 20 seconds, and 72 ° C for 30 seconds. 32 cycles were performed. After PCR, the reaction solution was subjected to 2% agarose gel electrophoresis.
- the amplified fragment of the target size (about 400 bp) was purified using the QIAquick Gel Extraction Kit (QIAGEN) according to the method described in the attached instruction manual, and eluted with sterile water 501.
- QIAGEN QIAquick Gel Extraction Kit
- 100 ⁇ L of the reaction solution VH fragment solution 3 ⁇ 1 VL fragment solution 3 ⁇ 1 KOD plus buffer (Toyobo), 0.2 mM dNTPs, ImM MgCl, 5 units DNA polymerase KOD plus ( Toyobo)
- the reaction solution was purified using QIAquick PCR purification kit (QIAGEN), and the purified product was digested with restriction enzyme Sfi 1 (Takara Bio) at 50 ° C overnight.
- Sfi 1 restriction enzyme Sfi 1
- the amplified fragment of the desired size (approximately 800 bp) is purified using the QIAquick Gel Extraction Kit (QIAGEN) by the method described in the attached instruction manual, and is diluted with an appropriate amount of sterile water. Eluted.
- pELBGlad was used as a phagemid vector.
- the digested fragment of the desired size (about 5 kb) was attached using the QIAquick Gel Extraction Kit (QIAGEN). Purified by the method described in this manual and eluted with an appropriate amount of sterilized water. The purified PCR product and the purified vector fragment were subjected to a ligation reaction at 16 ° C overnight using Ligation High (Toyobo) according to the method described in the attached instruction manual.
- Otsuki easy bacteria XLlblue electrocompetent cell (Stratagene) or Elect-mouth Mac DH12s (Invitrogen) was transformed by electroporation according to the method described in the attached instruction manual. All the obtained ampicillin-resistant transformants were collected and stored at -20 ° C until used as a recombinant E. coli library.
- the E. coli library (2 x 10 9 cfo) was inoculated into 50 mL 2xYTAG (100 ⁇ g / mL ampicillin, 2% containing 2% glucose) at 37 ° C until OD 600 0.4-0.5.
- the culture supernatant was collected by centrifugation, mixed with 100 mL PEG-NaCl solution (10% polyethylene glycol 8000, 2.5 mol / L NaCl), and allowed to stand at 4 ° C for 60 minutes.
- the phage was precipitated by centrifugation at 10,800 ⁇ g for 30 minutes, the precipitate was suspended in 40 mL of water, mixed with 8 mL of PEG-NaCl solution, and allowed to stand at 4 ° C. for 1 hour.
- the phage was precipitated by centrifugation at 10,800 X g for 30 minutes and suspended in 5 mL PBS to obtain a phage library. The phage was stored at 4 ° C until use.
- a phage library (801 / well ⁇ 5) incubated with 2.5% w / v skim milk for 15 minutes was added and allowed to contact with the antigen for 60 minutes.
- the antigen-binding phage was washed several times with 1 mL of PBST (PBS containing 0.1% Tween-20), and then washed with PBS.
- the phage was eluted by incubating with 0.8 mL of 0.1 mol / L glycine / HCl (pH 2.2) for 5 minutes.
- the cells were resuspended in 2 ⁇ YTAK 100 mL and cultured at 30 ° C. for 10 hours.
- the culture supernatant was collected by centrifugation, mixed with 20 mL of 10% PEG-5mol / L NaCl solution, and allowed to stand at 4 ° C for 20 minutes.
- the phage was precipitated by centrifugation at 10,800 xg for 30 minutes, and suspended in 2 mL of PBS for the next panjung.
- the single colony described above was inoculated into 100 L 2 ⁇ YTAG and cultured at 30 ° C. Inoculate 5 ⁇ L of this into 500 ⁇ L 2xYTAG, culture at 37 ° C for 5 hours, add helper phage 2 x 10 8 pfo, allow to stand at 37 ° C for 30 minutes, and further at 37 ° C for 30 minutes After the stirring culture, 120 L of 2 ⁇ YTAK containing 0.5 mM IPTG was added. The cells were cultured at 30 ° C, and the centrifuged supernatant was subjected to ELISA.
- StreptaWell 96 microtiter plates (Roche) coated with 1.0 g / mL biotin-labeled antigen were used for ELISA of clones obtained in Panjung with biotin-labeled antigen.
- an imnoplate (MaxiSorp, Nunc) immobilized with 1.0 ⁇ g / mL native antigen was used for ELISA of clones obtained by native antigen Panjung.
- an imnoplate MaxiSorp, Nunc
- blocking was performed with 200 L of 2% M-PBS or 2% BSA-PBS (PBS containing 2% w / v BSA) as a blocking buffer for 1 hour at room temperature.
- the buffer was removed, and the culture supernatant was added thereto and allowed to stand for 60 minutes to bind the phage. After washing, bound phages were detected with HRP-conjugated anti-M13 antibody (Amersham Pharmacia Biotech) diluted with blocking buffer and TMB substrate (Zymed), and the reaction was performed by adding lmol / LHSO.
- Recombinant Escherichia coli 2xYTAG culture solution of clones that were positive in ELISA also showed primers PBG3-F1 (5'-CAGCTATGAAATACCTATTGCC-3'Z SEQ ID NO: 1) and PBG3-R1 (5'-CTTTTCATAATCAAAATCACCGG -3 '/ SEQ ID NO: : ScFv by PCR using 2) The region was amplified and its nucleotide sequence was determined.
- PCR reaction solution containing 1 L of culture solution, 1.5 ⁇ L of 10X KOD Dash buffer, 0.2 ⁇ L of 10 ⁇ mol / L primer, and 0.3 ⁇ L of KOD Dash polymerase (Toyobo, 2.5 U / ⁇ L) 15 ⁇ L L was amplified in a thermal cycler GeneAmp PCR system 9700 (Perkin Elmer) at 96 ° C, 10 seconds, 55 ° C, 10 seconds, 72 ° C, 30 seconds, 30 cycles. After PCR, add 3 ⁇ L of ExoSAP-IT (Amersham) to 5 ⁇ L of the reaction mixture, and continue at 80 at 37 ° C for 15 minutes. C, incubated for 15 minutes.
- PBG3-F2 (5, -ATTGCCTACGGCAGCCGCT-3'Z SEQ ID NO: 3) is available! /, BigDye Terminator using PBG3-R2 (5'-AAATCACCGGGAACCAGAGCC-3'Z SEQ ID NO: 4) as a primer and ycle Sequencing kit (Applied Biosystems; [I]), electrophoresed on an Applied Biosystems PRISM 3700 DNA Sequencer. 52 clones of anti-Factor IXa and 52 clones of anti-Factor X Thirty-three clones were selected.
- the antibody variable regions (VH, VL) were cloned into an inducible expression vector by the same method shown in Examples 3-3, 3-4, and 3-5.
- Anti-F.IXa antibody variable regions (VH and VL) were incorporated into tetracycline-inducible vectors (pcDNA4-g4H and pcDNA4-g4L, respectively).
- Anti-F.X antibody variable regions (VH and VL) were derived from etadysone analog-inducible vectors (pIND-g4H and
- Plasmid DNA was isolated from each target clone using QIAprep Spin Miniprep Kit (QIAGEN) and dissolved in 100 L of sterilized water.
- the DNA solution was expressed in animal cells in the same manner as described in Examples 42 and 43, and the culture supernatant was recovered.
- the samples were stored at 4 ° C until use.
- the concentration of human HgG in the culture supernatant was calculated from the calibration curve of human IgG4 (humanized anti-TF antibody, see WO 99/51743).
- the antibody concentration was determined according to Example 5.
- the F.VIIIa-like activity of the bispecific antibody was evaluated using the following enzyme assay. In addition, all of the following anti-J spirits are performed at the highest temperature. 10 ⁇ L of Factor IX (Enzyme Research Laboratories) at 15 ⁇ g / mL, 5 ⁇ L of TBSB containing 100 mM CaCl and 20 mM MgCl, and the method described in Example 10-7
- the mixture of 50 ⁇ L of the culture supernatant obtained in step 1 was incubated in a 96-well plate for 1 hour. Further, 10 ng / mL of Factor XIa (Enzyme Research Laboratories) 10 ⁇ L, 50 ⁇ g / mL of Factor X (Enzyme Research Laboratories) 20 ⁇ L and 400 ⁇ g / mL of phospholipid 5 L were added to the mixture. Cultivation was performed to start the enzyme reaction. After reacting for 30 minutes, the reaction was stopped by adding 10 L of 0.5 M EDTA.
- TBSB was used as a solvent for Phospholipid, Factor XIa, Factor IX, and Factor X.
- Chromogenic substrate solution was prepared according to the instructions provided. ⁇ Dissolved test team chromogenic substrate S-2222 (
- Chromogenix and 1: 1 mixture of polybrene II '(0.6 mg / L hexadimethrine bromide (Sigma)).
- Example 11 To determine whether the bispecific antibody prepared according to the method of Example 11 restores the clotting ability of blood of hemophilia A, the activity of F.VIII-deficient plasma was compared with that of activated ligated partial thromboplastin time (APTT). The effect of this antibody was evaluated in the same manner as described in Example 7 ( Figure 1). 3). Furthermore, concentration dependence was measured for A44 / B26 and A69 / B26, which had a high effect of shortening the coagulation time (see FIGS. 14 and 15).
- the effect of the bispecific IgG antibody on the inhibitor plasma was evaluated under the following plasma clotting conditions.
- a mixture of 10 ⁇ L of 100 ⁇ g / mL anti-human F.VIII neutralizing antibody (Catalog Number: MAB3440, CHEMICON) was incubated in 50 ⁇ L of F.VIII-deficient plasma (Biomerieux) at room temperature for 30 minutes. This plasma was used as inhibitor plasma.
- 40 ⁇ L of a 25 ⁇ g / mL antibody solution and 50 ⁇ L of an APTT reagent (Dade Behring) were added, and the mixture was heated at 37 ° C. for 3 minutes.
- Example 17 Among the bispecific antibodies obtained in Example 7, the most effective in shortening the blood coagulation time was XB12 (mouse anti-FactorXa antibody) / SB04 (mouse anti-FactorX antibody). Humanization was performed as follows.
- SB04-L chain variable region EMBL Accession No. AB064111 (IMGT Database)
- Humanized antibodies were prepared by transplanting the complementarity determining regions (hereinafter, CDRs) of each mouse antibody into the FRs of the human antibodies (l)-(4).
- nlm.nih.gov/BLAST/ a secretory signal sequence of a human antibody having high homology to the human antibodies (1) to (4) was searched. The following secretion signal sequences obtained by the search were used.
- the reaction solution was subjected to 1% agarose gel electrophoresis.
- the DNA fragment of the desired size (about 400 bp) was purified using the QIAquick Gel Extraction Kit (QIAGEN) according to the method described in the attached instruction, and eluted with sterile water 301.
- tetracycline inducible expression plasmid prepared in Example 3- 4 (pcDNA4- g4H, pcDNA4- g4L ) and Egudaison analogues inducible expression plasmid (pIND- g4H, P IND-g4L ) digested with Xhol and Sfil After that, the fragment containing the antibody constant region (about 5 kb) was purified using a QIAquick Gel Extraction Kit (QIAGEN) according to the method described in the attached instruction manual, and eluted with sterile water 301.
- QIAquick Gel Extraction Kit QIAquick Gel Extraction Kit
- VH humanized XB12 antibody gene fragment
- VL L chain variable region
- pcDNA4-g4H, pcDNA4- g4L Xhol and Sfil digested tetracycline-inducible expression plasmids
- the antibody against APTT was evaluated using F.VIII-deficient plasma according to the method of Example 7. The effects were considered. Amino acids in human antibody FR were modified to increase the activity of humanized-species-specific antibodies with reduced blood coagulation ability. In addition, the cysteine residue of CDR3 of the XB12 antibody VH, which is feared to decrease thermal stability, was also changed to an alanine residue. Specifically, a mutation was introduced into a humanized antibody expression vector using the QuikCnange Site-Directed Mutagenesis Kit (Stratagene) by the method described in the attached instruction manual.
- QuikCnange Site-Directed Mutagenesis Kit Stratagene
- a human iris-specific antibody having the same activity as XB12 / SB04 humanized XB12 antibody (VH: hXB12f-A, VL: hXBVL) / human iris)
- the SB04 antibody VH: hSB04e, VL: hSBVL-F31 was obtained (FIG. 18).
- the present invention provides a bispecific antibody that recognizes both an enzyme and a substrate of the enzyme, and that substitutes for the function of a cofactor that enhances enzyme activity.
- the bispecific antibody of the present invention has high stability in blood and low antigenicity, and is expected to be a drug.
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Abstract
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Priority Applications (19)
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PL16162353T PL3085783T3 (pl) | 2003-10-10 | 2004-10-08 | Przeciwciało biswoiste zastępujące białka funkcjonalne |
EP04792180A EP1688488B9 (en) | 2003-10-10 | 2004-10-08 | Bispecific antibody substituting for factor viii |
RU2006115614/13A RU2339696C2 (ru) | 2003-10-10 | 2004-10-08 | Биспецифическое антитело, заменяющее функциональные белки |
AT04792180T ATE518952T1 (de) | 2003-10-10 | 2004-10-08 | Bispezifischer antikörper als ersatz für factor viii |
JP2005514610A JP5438880B2 (ja) | 2003-10-10 | 2004-10-08 | 機能蛋白質を代替する二種特異性抗体 |
NO20160762A NO345624B1 (no) | 2003-10-10 | 2004-10-08 | Fremgangsmåte for å oppnå bispesifikke antistoffer av IgG-type som funksjonelt erstatter faktor VIII/VIIIa. |
CA2541671A CA2541671C (en) | 2003-10-10 | 2004-10-08 | Bispecific antibody substituting for functional proteins |
KR1020127033128A KR101361437B1 (ko) | 2003-10-10 | 2004-10-08 | 기능 단백질을 대체하는 이종특이성 항체 |
NZ546509A NZ546509A (en) | 2003-10-10 | 2004-10-08 | Bispecific antibody substituting for functional proteins wherein the antibody can recognize both a proteolytic enzyme and a substrate thereof such as blood coagulation/fibrinolysis associated factors |
AU2004280421A AU2004280421B2 (en) | 2003-10-10 | 2004-10-08 | Bispecific antibody substituting for functional proteins |
BRPI0415230-1A BRPI0415230B1 (pt) | 2003-10-10 | 2004-10-08 | Anticorpo biespecífico de substituição de proteínas funcionais, composição e seu uso |
DK04792180.4T DK1688488T3 (da) | 2003-10-10 | 2004-10-08 | Bispecifikt antistof som erstatning for faktor III |
US10/575,193 US8062635B2 (en) | 2003-10-10 | 2004-10-08 | Bispecific antibody substituting for functional proteins |
EP16162353.3A EP3085783B1 (en) | 2003-10-10 | 2004-10-08 | Bispecific antibody substituting for functional proteins |
CN200480036248.8A CN1890369B (zh) | 2003-10-10 | 2004-10-08 | 替代功能蛋白质的双特异性抗体 |
MXPA06003831A MXPA06003831A (es) | 2003-10-10 | 2004-10-08 | Anticuerpo bi-especifico que substituye las proteinas funcionales. |
IL174794A IL174794A (en) | 2003-10-10 | 2006-04-05 | A specific antibody substitute for functional proteins |
KR1020067008860A KR101471194B1 (ko) | 2003-10-10 | 2006-05-08 | 기능 단백질을 대체하는 이종특이성 항체 |
NO20062087A NO338686B1 (no) | 2003-10-10 | 2006-05-09 | Bispesifikt antistoff som gjenkjenner både et proteolytisk enzym og et substrat derav, hvor det er i stand til å fungere som en kofaktor som forsterker den enzymatiske reaksjonen, og hvor enzymet, substratet og kofaktoren er spesifikke blodkoagulasjonsfaktorer. |
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PCT/JP2003/013123 WO2005035754A1 (ja) | 2003-10-14 | 2003-10-14 | 機能蛋白質を代替する二重特異性抗体 |
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PCT/JP2004/014911 WO2005035756A1 (ja) | 2003-10-10 | 2004-10-08 | 機能蛋白質を代替する二種特異性抗体 |
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EP1876236A4 (en) * | 2005-04-08 | 2009-07-29 | Chugai Pharmaceutical Co Ltd | SUBSTITUTION OF ANTIBODIES TO BLOOD COAGULATION FACTOR VIII FUNCTION |
WO2010107110A1 (ja) | 2009-03-19 | 2010-09-23 | 中外製薬株式会社 | 抗体定常領域改変体 |
US8062635B2 (en) | 2003-10-10 | 2011-11-22 | Chugai Seiyaku Kabushiki Kaisha | Bispecific antibody substituting for functional proteins |
JP2011530514A (ja) * | 2008-08-06 | 2011-12-22 | イーライ リリー アンド カンパニー | 抗ヘプシジン−25選択的抗体およびその使用 |
WO2012067176A1 (ja) | 2010-11-17 | 2012-05-24 | 中外製薬株式会社 | 血液凝固第viii因子の機能を代替する機能を有する多重特異性抗原結合分子 |
WO2012093704A1 (ja) | 2011-01-07 | 2012-07-12 | 中外製薬株式会社 | 抗体の物性を改善させる方法 |
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- 2004-10-08 AU AU2004280421A patent/AU2004280421B2/en not_active Expired
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- 2004-10-08 EP EP10180356A patent/EP2289944A3/en not_active Withdrawn
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- 2004-10-08 NO NO20160762A patent/NO345624B1/no unknown
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- 2004-10-08 DK DK04792180.4T patent/DK1688488T3/da active
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- 2004-10-08 EP EP16162353.3A patent/EP3085783B1/en not_active Expired - Lifetime
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