WO2005035582A1 - Ccr4に特異的に結合する抗体組成物 - Google Patents
Ccr4に特異的に結合する抗体組成物 Download PDFInfo
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- WO2005035582A1 WO2005035582A1 PCT/JP2004/015322 JP2004015322W WO2005035582A1 WO 2005035582 A1 WO2005035582 A1 WO 2005035582A1 JP 2004015322 W JP2004015322 W JP 2004015322W WO 2005035582 A1 WO2005035582 A1 WO 2005035582A1
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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
- C07K16/2866—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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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
- A61P1/04—Drugs for disorders of the alimentary tract or the digestive system for ulcers, gastritis or reflux esophagitis, e.g. antacids, inhibitors of acid secretion, mucosal protectants
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
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- A61P11/02—Nasal agents, e.g. decongestants
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- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P11/00—Drugs for disorders of the respiratory system
- A61P11/06—Antiasthmatics
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- A61P17/00—Drugs for dermatological disorders
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P27/00—Drugs for disorders of the senses
- A61P27/16—Otologicals
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P29/00—Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
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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
- A61P35/00—Antineoplastic agents
- A61P35/02—Antineoplastic agents specific for leukemia
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P37/00—Drugs for immunological or allergic disorders
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P37/00—Drugs for immunological or allergic disorders
- A61P37/08—Antiallergic 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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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2317/00—Immunoglobulins specific features
- C07K2317/40—Immunoglobulins specific features characterized by post-translational modification
- C07K2317/41—Glycosylation, sialylation, or fucosylation
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2317/00—Immunoglobulins specific features
- C07K2317/70—Immunoglobulins specific features characterized by effect upon binding to a cell or to an antigen
- C07K2317/73—Inducing cell death, e.g. apoptosis, necrosis or inhibition of cell proliferation
- C07K2317/732—Antibody-dependent cellular cytotoxicity [ADCC]
Definitions
- Antibody composition that specifically binds to CCR4.
- the present invention relates to a composition
- a composition comprising a recombinant antibody molecule that specifically binds to human CC chemokine receptor 4 (hereinafter referred to as CCR) and has an N-glycoside-linked complex type sugar chain in the Fc region.
- CCR human CC chemokine receptor 4
- An antibody composition wherein the N-glycoside-linked complex-type sugar chain is a sugar chain in which fucose is not bound to N-acetyltyldarcosamine at the reducing end of the sugar chain; a transformant producing the antibody product;
- the present invention relates to a method for producing an antibody composition and a medicine containing the antibody composition.
- Allergic diseases such as bronchial asthma are formed by various factors such as eosinophils, mast cells, IgE, cytokines and chemokines [Am. J. Respir. Crit. Care Med., 152, 2059 (1995), Immunol. Today, 15, 19 (1994)].
- Th cells CD4 positive helper T cells
- activated Th cells are increased in airway cells of bronchial asthma patients and peripheral blood [ Am. Rev. 'Respir. Dis., 145, S22 (1992)].
- IL-4 and IL-5 are elevated [Clin. Immunol. Immunopathol., 75, 75 (1995)]. These cytokins are produced by Th2 cells among helper cells. Therefore, ⁇ 1 ⁇ 2 cells are linked to allergic diseases. '
- Therapeutic methods for immune diseases mediated by Th cells include 1) antagonists of cytokines and chemokines 2) inhibitors of cytokines and chemokine production 3) regulators of inflammatory cell functions 4) chemical mediators, etc. However, they are only radically inhibiting a part of the complex cytokine-chemokine-inflammatory cell network and are not radical.
- Anti-CD4 antibodies can be used to control cells, but CD4 is widely expressed in immunocompetent cells and thus has the disadvantage of lacking specificity and being accompanied by strong immunosuppressive action [Int. Arch. Immunol., 118, 133 (1999)]. Steroids are the main treatment for Th2 cell-mediated immune diseases, but steroids have strong side effects.
- CCR Human CC chemokine receptor 4
- K5-5 from human immature basophil cell line KU-812.
- WO96 / 23068 J. Biol. Chem., 270, 19495 (1995)
- CCR4 is an effector / memory T cell [Int. Immunol., 11, 81 (1999)], and is reported to be expressed in memory cells involved in systemic immunity [Nature, 400, 776 (1999)].
- memory T cells which are activated when inflammation is induced, migrate to local inflammation via CCM via ligands MDC and TARC and activate other inflammatory cells. There is a strong indication that it may be encouraged.
- adult T-cell leukemia leukemia including mycosis fungoides, lymphoma In ', it has been reported that CCR4 is expressed on the tumor cell surface [Blood, 96, 685 (200
- therapeutic agents for removing CCR4-expressing cells from patients are effective not only for Th2 cell-mediated immune diseases but also for CCR-mediated inflammatory diseases and leukemias. It is expected.
- therapeutic agents targeting such specific molecules the following antibodies against CCR4 are known.
- Antibodies against CCR include 1G1 and 2B10 antibodies (WO00 / 42074), which have receptor neutralizing activity, and antibodies (WO02 / 15666), which have angiogonist activity.These antibodies are hybridomas. Is an antibody produced by In addition, a human IgGl anti-CCR4 human CDR-grafted antibody that specifically reacts with the extracellular region of human CCR4, has no reactivity with platelets, and has cytotoxic activity against human CCR4-expressing cells is known. (W003 8635).
- Humanized antibodies can be prepared as various forms of molecules because they are prepared using genetic recombination technology. For example, a humanized antibody having a high effector function can be produced [Caneer Res., 56, 1118 (1996)].
- Human IgG'l subclass antibodies express ADCC activity and CDC activity through the interaction between their Fc region and the antibody receptor (hereinafter referred to as FcaR) or various complement components.
- FcaR antibody receptor
- various complement components In the binding between the antibody and FcaR, it is suggested that the sugar chain binding to the hinge domain of the antibody and the second domain of the C region (hereinafter referred to as C ⁇ 2 ′ domain) is important. [Chemical Immunology, 65, 88, (1997)].
- Antibodies vary in the addition of galactose to the non-reducing end of the complex N-glycoside-linked sugar chain bound to the Fc region of the IgG molecule, and the addition of fucose to the N-acetylglucosamine at the reducing end. [Biochemistry, 36, 130 (1997)], and it has been reported that the addition of fucose to N-acetylglucosamine at the reducing end of the sugar chain significantly reduces the ADCC activity of the antibody. [WO00 / 61739, J. Biol. Chem., 278, 3466 (2003)].
- antibody compositions used as pharmaceuticals are produced using genetic recombination techniques and are produced using animal cells, such as CH0 cells derived from Chinese nomster ovary tissue, as host cells.
- animal cells such as CH0 cells derived from Chinese nomster ovary tissue
- the sugar chain structure of the antibody composition varies depending on the host cell.
- the composition comprising an antibody molecule having an Fc region can be added to the composition. It is possible to increase the ratio of sugar chains in which fucose is not bound to N-acetylglycosamine at the reducing end of the complex N-glycoside-linked sugar chain that binds to the Fc region contained therein (C / 31140).
- An object of the present invention is to provide a composition comprising a recombinant antibody molecule that specifically binds to human CC chemokine receptor 4 (hereinafter, referred to as CCR4) and has a complex N-glycoside-linked sugar chain in the Fc region.
- CCR4 human CC chemokine receptor 4
- An antibody composition wherein the N-glycoside-linked complex-type sugar chain is a sugar chain in which fucose is not linked to N-acetylglycamine at the reducing end of the sugar chain; a transformant producing the antibody composition;
- An object of the present invention is to provide a method for producing an antibody composition and a medicament containing the antibody composition.
- the anti-CCR4 antibody composition of the present invention does not contain an antibody molecule having a sugar chain to which fucose is bound, the effector function is enhanced. Therefore, it is useful for the treatment of reducing the number of CCR4-expressing ⁇ 1 ⁇ 2 cells from a patient's body.
- treatment with chemotherapy and radioisotope-labeled compounds is not required, which is expected to reduce side effects on patients. Is done.
- reducing the dosage of therapeutic agents to patients is expected to reduce the burden on patients.
- the present invention relates to the following (1) to (55).
- An antibody composition comprising a recombinant antibody molecule which specifically binds to human CC chemokine receptor 4 (CCR4) and has a ⁇ -glycoside-linked complex type glycan in an Fc region, comprising an N-glycoside-linked
- An antibody composition wherein the complex type sugar chain is a sugar chain in which fucose is not bound to N-acetylglycosamine at the reducing end of the sugar chain.
- the N-glycoside-linked complex-type sugar chain is a sugar chain in which the 1-position of fucose is not bonded to the 6-position of N-acetylglycosamine at the reducing end of the sugar chain.
- Antibody composition is a sugar chain in which the 1-position of fucose is not bonded to the 6-position of N-acetylglycosamine at the reducing end of the sugar chain.
- the binding to the peptide in which at least one of the 16, 19, 20 and 20th tyrosine residues is sulfated is determined.
- the antibody composition according to (7) which has lower binding ability to a peptide containing amino acids 13 to 25 of the amino acid sequence represented by No. 36.
- CDRs Complementarity determining regions
- the heavy chain (H chain) variable region (V region) of the antibody molecule contains the amino acid sequence represented by SEQ ID NO: 21, and the light chain (L chain) V region of the antibody molecule is represented by SEQ ID NO: 23.
- CDR Complementarity-determining region of heavy chain (H chain) variable region (V region) and light chain (L chain) V region of monoclonal antibody that specifically binds to human CC chemokine receptor (CCR4)
- CCR4 human CC chemokine receptor
- FR framework region of the H chain V region and L chain V region of the human antibody, and the H chain constant region (C region) and the L chain C region of the human antibody.
- the heavy chain (H chain) variable region (V region) of the antibody molecule has the amino acid sequence represented by SEQ ID NO: 24, or the 40th Ala, 42nd Gly, 43 amino acid sequence of the amino acid sequence represented by SEQ ID NO: 24.
- Lss including an amino acid sequence in which at least one amino acid residue selected from Gly at position 44, Lys at position 76, and Ala at position 97 has been replaced with another amino acid residue;
- the antibody composition according to any one of (26).
- the heavy chain (H chain) variable region (V region) of the antibody molecule is composed of the amino acid sequence represented by SEQ ID NO: 25 or the amino acid sequence represented by SEQ ID NO: 25, Thi "at position 28 and Ala at position 97.
- the light chain (L chain) variable region (V region) of the antibody molecule has the amino acid sequence represented by SEQ ID NO: 26, or the second Ile, third Val, 50 amino acid sequence of the amino acid sequence represented by SEQ ID NO: 26 (24)
- the heavy chain (H chain) variable region (V region) of the antibody molecule has the amino acid sequence represented by SEQ ID NO: or the amino acid sequence represented by SEQ ID NO: 24, Ala at position 40, Gly at position 42, Glyte at position 43 Lyss contains an amino acid sequence in which at least one amino acid residue selected from Gly at position 44, Lys at position 76, and Ala at position 97 has been substituted with another amino acid residue, and the light chain of the antibody molecule (L chain)
- the V region consists of the amino acid sequence represented by SEQ ID NO: 26, or the amino acid sequence represented by SEQ ID NO: 26, from the 2nd Ile, 3rd Val, 50th Gln, and 88th Val
- the antibody composition according to any one of (24) to (27) and (29), wherein at least one selected amino acid residue contains an amino acid sequence substituted with another amino acid residue.
- the heavy chain (H chain) variable region (V region) of the antibody molecule is selected from the amino acid sequence represented by SEQ ID NO: 25, or the 28th Thr and 97th Ala of the amino acid sequence represented by SEQ ID NO: 25.
- the light chain (L chain) V region of the antibody molecule has the amino acid sequence represented by SEQ ID NO: 26, or the amino acid sequence represented by SEQ ID NO: 26, wherein at least one amino acid residue is substituted with another amino acid residue.
- the heavy chain (H chain) variable region (V region) of the antibody molecule is represented by SEQ ID NO: 24, 25, 27, 2
- the heavy chain (H chain) variable region (V region) of the antibody molecule has an amino acid sequence selected from the amino acid sequences represented by SEQ ID NOs: M, 25, 27, 28, 29, 30, 31 and 32; and
- the light chain (L chain) V region of the antibody molecule comprises an amino acid sequence selected from the amino acid sequences represented by SEQ ID NOs: 33, 34, and 35 (24;) to (26), (32), and (33)
- the antibody composition according to any one of the above.
- the heavy chain (H chain) variable region (V region) of the antibody molecule contains the amino acid sequence represented by SEQ ID NO: 27 or, and the light chain (L chain) V region of the antibody molecule is SEQ ID NO: 35
- the host cell must have an intracellular sugar nucleotide, GDP-an enzyme involved in the synthesis of fucose, or an N-glycoside-linked complex-type bran chain reducing end, N-acetylglucosamine at position 6 with fucose at position 1.
- the transformant according to (36) which is a cell whose genome has been modified so as to inactivate an enzyme involved in sugar chain decoration to be bound.
- the host cell binds the 1st position of fucose to the 6th position of the enzyme involved in the synthesis of the intracellular sugar nucleotide GDP-fucose, or N-acetylglucosamine at the N-glycoside-linked complex type sugar chain reducing end. (36) The transformant according to (36), wherein all of the alleles on the genome of the enzyme involved in sugar chain modification are non-quantified cells. '
- GDP-4-keto-6-deoxy-D-mannose-3,5-epimerase is a protein encoded by D.NA selected from the group consisting of the following (a) and (b): The transformant according to 39).
- a medicament comprising the antibody composition according to any one of (1) to (35) and (50) as an active ingredient.
- a therapeutic agent for a human CC chemokine receptor (CCR4) -related disease comprising as an active ingredient the antibody composition according to any one of (1) to (35) and (50).
- CCR4 human CC chemokine receptor
- a treatment for a human CC chemokine receptor 4 (CCR4) -related disease which comprises administering the antibody composition according to any one of (1) to (35) and (50) to a patient.
- An antibody composition comprising a recombinant antibody molecule of the present invention which specifically binds to human CCM and has an N-glycoside-linked complex type sugar chain in an Fc region, wherein the N-glycoside-linked complex type sugar chain is Sugar chain reduction
- the N-glycosidic complex type sugar chain is composed of the N-acetylglucosamine of the sugar chain reducing terminal.
- Antibody molecules have Fc regions, to which N-glycoside-linked sugar chains are attached. Therefore, two sugar chains are bound per antibody molecule.
- the N-glycoside-linked sugar chain has one or more side chains of galactose-N-acetylglucosamine (hereinafter, referred to as Gal-GlcNAc) on the non-reducing end side of the core structure in parallel, and further comprises Gal- Complex sugar chains having sialic acid, bisecting N-acetylglycosamine, etc. on the non-reducing terminal side of GlcNAc can be mentioned.
- Gal-GlcNAc galactose-N-acetylglucosamine
- the complex N-glucoside-linked sugar chain is represented by the following chemical formula 1.
- the sugar chain to which fucose is not bound may be any one in which fucose is not bound to N-acetylglucosamine at the reducing end in the chemical formula shown above, and
- the structure of the sugar chain may be any.
- the antibody composition of the present invention may be composed of an antibody molecule having a single sugar chain structure as long as it has the above sugar chain structure, or may have a plurality of different sugar chain structures. It may be composed of an antibody molecule having the same.
- the expression that fucose is not bound to N-acetylglycosamine at the reducing end of the sugar chain means that fucose is not substantially bound.
- the antibody composition having substantially no fucose binding specifically refers to an antibody composition in which fucose is not substantially detectable in the sugar chain analysis described in 4 below. Substantially undetectable means that it is below the detection limit of the measurement.
- the antibody composition of the present invention in which fucose is not bound to N-acetylglycosamine at the reducing end of the sugar chain has high ADCC activity.
- Percentage of antibody molecules having a sugar chain in which fucose is not bound to N-acetylglucosamine at the reducing end of the sugar chain contained in an antibody composition comprising an antibody molecule having an N-glycoside-linked complex type sugar chain in the Fc region
- an antibody composition comprising an antibody molecule having an N-glycoside-linked complex type sugar chain in the Fc region
- known methods such as hydrazine degradation and enzymatic digestion from antibody molecules [Biochemical Experimental Method, Protein Glycoprotein Research Method (Society Press Center), Takako Reiko (ed., 1989)]
- release sugar chains and release release
- the labeled sugar chain can be determined by labeling the sugar chain with a fluorescent label or an isotope, and separating the labeled sugar chain by one-way chromatography.
- the released sugar chains can be determined by analyzing by HPAED-PAD method [Journal of Liquid Chromatography (j, Liq. Chromatogr.), 6, 15
- the antibody composition of the present invention is an antibody composition comprising a recombinant antibody molecule that specifically reacts with the extracellular region of human CCR4, wherein the ⁇ -glycoside-linked complex type sugar chain has a reducing terminal of the sugar chain.
- the antibody composition is a sugar chain in which fucose is not bound to ⁇ -acetylglucosamine, and among them, an antibody substance that does not show reactivity with human platelets is preferable.
- the extracellular region of human CC is represented by an amino acid sequence containing amino acids 1 to 39, 98 to 112, 176 to 206 or 271 to 284 of the amino acid sequence represented by SEQ ID NO: 36, and preferably represented by SEQ ID NO: 36. 2 to 29 of the amino acid sequence (SEQ ID NO: 37), more preferably 12 to 29 of the amino acid sequence represented by SEQ ID NO: 36 (SEQ ID NO: 38), still more preferably one of the amino acid sequences represented by SEQ ID NO: 36 Polypeptides or peptides represented by the 2nd to 25th positions are exemplified.
- the antibody composition of the present invention preferably comprises a region containing amino acids 1 to 39, 98 to 112, 176 to 206 or 271 to 284 of the amino acid sequence shown in SEQ ID NO: 36, more preferably SEQ ID NO: 2 to 29 (SEQ ID NO: 37) of the amino acid sequence represented by 36, more preferably 12 to 29 (SEQ ID NO: 38) of the amino acid sequence represented by SEQ ID NO: 36, particularly preferably SEQ ID NO: 36
- An antibody composition which specifically reacts with the polypeptide or ⁇ peptide represented by the 12th to 25th amino acids in the amino acid sequence, wherein the ⁇ -glycosidic complex glycan is a ⁇ -glycan at the reducing end of the glycan.
- An antibody composition that is a sugar chain in which fucose is not bound to acetylglycosamine is exemplified.
- the term "reactive with human platelets” means that the antibody does not substantially react with human platelets.
- measurement using a device such as a flow cytometer that can detect the binding between the antibody and cells is used. No response.
- the antibody composition of the present invention at least one of tyrosine residues at positions 16, 19, .20 and 22 of the peptide containing the amino acids 13 to 25 of the amino acid sequence represented by SEQ ID NO: 36 is sulfated.
- An antibody composition having a lower binding property to the obtained peptide than the binding property to a synthetic peptide containing the 13th to 25th amino acids of the amino acid sequence represented by SEQ ID NO: 36 can be mentioned.
- the antibody composition of the present invention includes a recombinant antibody having no activity of inhibiting the binding of the CCR4 ligand TARC (thymus and activation-regulatated ceraokine) or MDC (macrophage-derived cemokine) to CCR4.
- Compositions. Having no activity of inhibiting the binding of CCR4 ligand TARC or MDC to CCR4 means that the antibody composition cannot substantially inhibit the binding between the ligand and the receptor. This means that even when the composition is in a high concentration, it does not affect the binding between the ligand and the receptor.
- “high concentration” means that the concentration of the antibody is 50 ⁇ g / mL or more.
- the antibody composition of the present invention includes a gene recombination that specifically binds to cells expressing human CCR4 (hereinafter referred to as human CCR4 expressing cells) and has an N-glycoside-linked complex type sugar chain in the Fc region.
- human CCR4 expressing cells include helper T2 cells (hereinafter referred to as Th2 cells).
- Th2 cells are cells that produce interleukin_4 (hereinafter, referred to as IL-4), interleukin-5 (hereinafter, referred to as IL-5) and interleukin-13 (hereinafter, referred to as IL-13) It is.
- IL-4 interleukin-4
- IL-5 interleukin-5
- IL-13 interleukin-13
- cytotoxic activity include complement-dependent cytotoxic activity (hereinafter referred to as CDC activity) and antibody-dependent cytotoxic activity (hereinafter referred to as ADCC activity).
- An antibody composition having cytotoxic activity against human CCR4-expressing cells wherein the N-glycoside-linked complex type sugar chain is a sugar chain in which fucose is not linked to N-acetylglycosamine at the reducing end of the sugar chain.
- Certain antibody compositions can remove Th2 cells by damaging Th2 cells, which are human CCR4-expressing cells, by the cytotoxic activity of the antibody composition. Therefore, the antibody composition can suppress production of interleukins such as IIHk IL-5 and IL-13 from h2 cells.
- the antibodies of the present invention include human chimeric antibody compositions, human CDR-grafted antibody compositions and human antibody compositions, and antibody fragment compositions thereof.
- the human chimeric antibody refers to an antibody consisting of VH and VL of a non-human animal antibody and CH and CL of a human antibody.
- any animal can be used as long as hybridomas can be produced, such as mice, rats, hamsters, and rabbits.
- the human chimeric antibody composition of the present invention obtains cDNAs encoding VH and VL of non-human animal antibodies specifically reacting with human CCR4, and has genes encoding human antibody CH and CL.
- the expression vector can be produced by constructing a human-type chimeric antibody expression vector by inserting it into an animal cell expression vector and introducing it into animal cells.
- the CH of the human chimeric antibody may be any one belonging to human immunoglobulin (hereinafter, referred to as hlg), but is preferably of the hlgG class, and more preferably belongs to the hlgG class, higG hIgG2 s hIgG3, Any of the subclasses such as gG4 can be used.
- hlg human immunoglobulin
- CL the CL of the human chimeric antibody
- any CL belonging to hlg may be used, and class CL or I class CL can be used.
- the human quinula antibody composition that specifically binds to human CCR4 of the present invention includes VH CDR1, CDR2, CDR3 and / or VH consisting of the amino acid sequences represented by SEQ ID NOS: 14, 15 and 16, respectively. 17, 18, the VL comprising the amino acid sequence represented by 19 CDRl, CD 2 S antihuman CCR4 Kinura antibodies comprising CDR3 S, amino acid sequence and / or VL SEQ ID NO: VH of the antibody are shown in SEQ ID NO: 21 23
- An anti-human CCR4 quinula antibody containing an amino acid sequence represented by, the VH of the antibody is composed of the amino acid sequence represented by SEQ ID NO: 21 and the CH of the human antibody is composed of the amino acid sequence of the hlgGl subclass, and the VL of the antibody is SEQ ID NO: 23.
- an anti-human CCR4 chimeric antibody composition comprising an amino acid sequence of the class consisting of an amino acid sequence represented by
- the human CDR-grafted antibody means an antibody obtained by grafting the VH and VL CDRs of a non-human animal antibody into the appropriate positions of the human antibody VH and VL.
- the human CDR-grafted antibody composition of the present invention is characterized in that the CDRs of V CDR and VL of an antibody of a non-human animal specifically reacting with CCR4 are converted into VH and VL frameworks of any human antibody (hereinafter referred to as FR).
- An animal having a DNA encoding the heavy chain constant region (hereinafter, referred to as CH) and the light chain constant region (hereinafter, referred to as CL) of a human antibody Expression vector for cells To construct a human-type CDR-grafted antibody expression vector, and to express and produce the expression vector by introducing it into animal cells.
- 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.
- amino acid sequences of human antibody VH and VL FR amino acids registered in databases such as the Protein Data Bank, or the common amino acid sequences of human antibody VH and VL FR subgroups (Sequences of Proteins of Immunological In terest, US Dept. Health and Human Services, 1991).
- the CH of the antibody of the present invention may be any CH as long as it belongs to Mg, but is preferably of the MgG class, and any subclass such as hIgGl, hIgG2, hIgG3 gG4 belonging to the hlgG class can be used.
- the CL of the human CDR-grafted antibody may be any of those belonging to hlg, and may be of class or ⁇ class.
- the human CDR-grafted antibody composition of the present invention includes CDR1, CDR2, CDR3 of antibody VH consisting of the amino acid sequence represented by SEQ ID NOS: 14, 15, and 16, and / or SEQ ID NOs: 17, 18, and 19, respectively.
- Examples include a human CDR-grafted antibody comprising VL CDR1, CM2, and CDR3 comprising the indicated amino acid sequence, or an antibody fragment composition thereof.
- the VH of the antibody is the amino acid sequence represented by SEQ ID NO: 24, or the amino acid sequence represented by SEQ ID NO: 24, Ala at position 40, Gly at position 42, and Gly at position 43;
- at least one amino acid residue of the amino acid sequence represented by SEQ ID NO: 25 or at least one of the 28th Thr and 97th Ala of the amino acid sequence represented by SEQ ID NO: 25 is substituted.
- the G1 n and the .88 a A human CDR-grafted antibody comprising an amino acid sequence in which at least one amino acid residue selected from l is substituted is preferred, and the VH of the antibody is Ala at position 40, Gly at position 42 in the amino acid sequence represented by SEQ ID NO:
- An antibody comprising an amino acid sequence in which at least one amino acid residue selected from Lys at position 43, Gly at position 44, Lys at position 6, and Ala at position 97 is substituted with another amino acid residue; and
- at least one amino acid residue selected from the second Ile, the third Val, the 50th Gln, and the 88th Val has another amino acid residue.
- a human CDR-grafted antibody composition comprising an amino acid sequence substituted with a residue, at least one amino acid wherein the VH of the antibody is selected from Thr at position 28 and Ala at position 97 in the amino acid sequence represented by SEQ ID NO: 25 Residue is another amino acid
- a human CDR-grafted antibody composition comprising an amino acid sequence in which one amino acid residue is substituted with another amino acid residue is more preferred. .
- a human CDR-grafted antibody composition comprising an amino acid sequence selected from the amino acid sequences represented by SEQ ID NOs: 24, 25, 27, 28, 29, 30, 31, and 32, VL is a human CDR-grafted antibody composition comprising one amino acid sequence selected from the amino acid sequences represented by SEQ ID NOs: 26, 33, 34, and 35; VH of the antibody is SEQ ID NOs: 24, 25, 27, 28, Indicated by 29, 30, 31 and 32;
- a human CDR-grafted antibody composition comprising an amino acid sequence selected from amino acid sequences and an VL of the antibody comprising an amino acid sequence selected from SEQ ID NOs: 26, 33, 34, and 35, and the like.
- one or more amino acids have been deleted, added, substituted, and / or inserted, and specifically bind to the extracellular region of human CCR4, and are not reactive with human platelets. Fragments are also included in the antibody compositions of the present invention.
- the number of amino acids to be deleted, substituted, inserted and / or added is one or more, and the number is not particularly limited.
- Deletion, substitution, insertion or addition of one or more amino acid residues in the amino acid sequence of the antibody thread of the present invention means that one or more amino acid residues in one or more amino acid sequences in the same sequence Means that a plurality of amino acid residues are deleted, substituted, inserted or added, and the deletion, substitution, insertion or addition may occur simultaneously, and the amino acid residue to be substituted, inserted or added is naturally occurring. Regardless of type or unnatural type.
- Natural amino acid residues include L-alanine, L-asparagine, L-asparaginic acid, L-glutamine, L-glutamic acid, glycine, L-histidine, L-isoleucine, L-leucine, L-lysine, L- Examples include methionine, L-phenylalanine, L-proline, L-serine, L-threonine, L-tributophane, L-tyrosine, L-valine, and L-cysteine.
- Group A leucine, isoleucine, norleucine, norin, nornoline, alanine, 2-aminobutanoic acid, methionine, 0-methylserine, t-butylglycine, t-butylylalanine, cyclohexylalanine
- Group B aspartic acid, glutamic acid, isoaspartic acid, isoglutamic acid, 2-amino adipic acid, 2-aminosuberic acid ''
- Group D lysine, arginine, orditin, 2,4-diaminobonic acid, 2,3-diaminopropionic acid
- Group E Proline, 3-hydroxyproline, 4-hydroxyproline
- Group F serine, threonine, homoserine
- the recombinant antibody fragment composition of the present invention is an antibody fragment of the recombinant antibody composition that specifically binds to human CC, wherein the N-glycoside-linked complex type sugar chain is located at the reducing end of the sugar chain.
- N-acetyl glu An antibody fragment composition comprising part or all of an antibody Fc region that is a sugar chain in which fucose is not bound to cosamine.
- the antibody fragment compositions of the present invention include antibody fragment compositions such as Fab, Fab ⁇ F (ab ') 2 , scFv, diabody, dsFv, and peptides including CDRs, and N-glycoside-linked complex-type sugar chains.
- An antibody fragment composition containing a part or all of an antibody Fc region, which is a sugar chain in which fucose is not bound to N-acetylglycosamine at the reducing end of the sugar chain may be mentioned.
- the fusion protein composition may be fused with a part or the whole of the Fc region, or may be a fusion protein composition with a protein containing a part or the whole of the Fc region.
- Fab is a fragment obtained by treating IgG with proteolytic enzyme papain (which is cleaved at the amino acid residue at position 224 of the H chain). About half of the N-terminal side of the H chain and the entire L chain are disulfide. It is an antibody fragment having a molecular weight of about 50,000 and having antigen-binding activity, which is bound by bonding.
- the Fab of the present invention can be obtained by treating the antibody composition of the present invention that specifically binds to human CCR4 with proteolytic enzyme papain.
- DNA encoding the Fab of the antibody is introduced into a prokaryotic expression vector or a eukaryotic expression vector, and the vector is expressed by introducing the vector into a prokaryotic organism. Can be manufactured.
- F (a) ') 2 is a fragment obtained by treating IgG with the protease pepsin (which is cleaved at the 234th amino acid residue of the H chain). It is a slightly larger antibody fragment with a molecular weight of about 100,000 and an antigen-binding activity.
- F (ab ') 2 of the present invention can be obtained by treating the antibody composition of the present invention that specifically binds to human CCR4 with proteolytic enzyme pepsin.
- the following Fab ′ can be prepared by a thioether bond or a disulfide bond.
- Fab is an antibody fragment having a molecular weight of about 50,000 and having an antigen-binding activity, in which the disulfide bond in the hinge region of F (ab') 2 is cleaved.
- the 'Fab of the present invention' can be obtained by treating the F (ab ') 2 composition of the present invention which specifically binds to human CCR4 with a reducing agent dithiothreitol.
- a DNA encoding the Fab ′ fragment of the antibody may be inserted into a prokaryotic expression vector or a eukaryotic expression vector, and the vector may be expressed and produced by introducing the vector into a prokaryotic or eukaryotic organism. it can.
- scFv is a VH-P-VL or VL-P-VH polypeptide in which one VH and one VL are linked using an appropriate peptide linker (hereinafter referred to as P).
- P an appropriate peptide linker
- the scFv of the present invention is obtained by obtaining cDNAs encoding VH and VL of an antibody composition specifically binding to human CCR4 of the present invention, constructing a DNA encoding the scFv, and using the DNA as a prokaryotic expression vector.
- the expression vector can be inserted into a eukaryotic expression vector, and then introduced into a prokaryote or eukaryote to express and produce it.
- the diabody is an antibody fragment obtained by dimerizing scFv and has a bivalent antigen-binding activity.
- the divalent antigen-binding activities can be the same, or one can have a different antigen-binding activity.
- the diabody of the present invention obtains a cDNA encoding the VH composition and VL of an antibody that specifically binds to the human CCR4 of the present invention, and replaces the scFv-encoding DNA with a P amino acid sequence having a length of 8 residues.
- the DNA is inserted into a prokaryotic expression vector or a eukaryotic expression vector, and the expression vector is introduced into the prokaryote or eukaryote to express the DNA. can do.
- dsFv refers to a polypeptide in which one amino acid residue in each of VH and VL has been substituted with a cysteine residue, which 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 three-dimensional structure of the antibody according to the method shown by Reiter et al. (Protein Engineering, 7, 697-704, 1994).
- the dsFv of the present invention is obtained by obtaining cDNA encoding VH and VL of the antibody composition specifically binding to human CCR4 of the present invention, constructing a DNA encoding dsFv, and using the DNA as a prokaryotic expression vector. Alternatively, it can be produced by inserting into an eukaryotic expression vector and introducing the expression vector into a prokaryotic or eukaryotic organism. -
- the peptide containing the CDR comprises at least one region of CDR of VH or VL.
- Peptides containing more than one C can be linked directly or via an appropriate peptide linker.
- the peptide containing the CDR of the present invention is constructed by constructing ⁇ A encoding the VH and VL CDRs of the antibody composition specifically binding to human CCR4 of the present invention, and converting the DNA into a prokaryotic expression vector.
- it can be produced by inserting the gene into a prokaryotic or eukaryotic organism by inserting the gene into a prokaryotic or eukaryotic organism.
- Peptides containing CD can also be produced by chemical synthesis methods such as the Fmoc method (fluorenylmethyloxycarbonyl method) and the tBoc method (t-butyloxycarbonyl method).
- the transformant of the present invention is a transformant obtained by introducing a DNA encoding an antibody molecule that specifically binds to human CCR4 into a host cell, wherein the transformant produces the antibody composition of the present invention. Any transformant is included as long as it is a transformant.
- a specific example is a transformant obtained by introducing a DNA encoding an antibody molecule that specifically binds to human CCR4 into a host cell such as (a) or (b) below. Can be -
- the genome so that the activity of the enzyme involved in glycosylation modification is inactivated ⁇ A modified cell.
- the genome has been modified to inactivate the enzyme, which means that a mutation is introduced into the expression control region of the gene encoding the enzyme so that the expression of the enzyme is deleted, or the enzyme is deleted.
- This refers to introducing a mutation into the amino acid sequence of the gene encoding the enzyme so as to activate the enzyme.
- Introducing a mutation refers to modifying the base sequence such as deleting, substituting, inserting and / or adding a base sequence on the genome.
- (c) a protein consisting of an amino acid sequence having 80% or more homology with the amino acid sequence represented by SEQ ID NO: 2 and having GDP-mannose 4,6-dehydratase activity; and the like.
- one or more amino acids are composed of an amino acid sequence in which deletion, substitution, insertion, and / or addition are performed, and GDP-4-keto-6-deoxy-D-mannose A protein having -3,5-epimmelase 'activity;
- ⁇ 1,6-fucosyltransferase is an enzyme involved in sugar chain modification in which position 1 of fucose is bonded to position 6 of N-acetylglycosamine at the reducing end of N-glycoside-linked complex type sugar chain.
- the 1,6-fucosyltransferase includes a protein encoded by the following DNA (a), (b), (c) or (d):
- amino acid sequence represented by SEQ ID NO: 7 one or more amino acids consist of a deletion, substitution, insertion, Z or addition amino acid sequence, and ⁇ 1,6-fucosyltransferase.
- a protein comprising an amino acid sequence having 80% or more homology with the amino acid sequence represented by SEQ ID NO: 8 and having 1,6-fucosyltransferase activity.
- Intracellular sugar nucleotide The DNA encoding the amino acid sequence of the enzyme involved in the synthesis of GDP-fucose is a DNA having the nucleotide sequence represented by SEQ ID NO: 1 or 3; represented by SEQ ID NO: 1 or 3 Examples include a DNA that hybridizes with a DNA having a base sequence under stringent conditions and encodes a protein having an enzymatic activity involved in the synthesis of intracellular sugar nucleotide GDP-fucose. - ⁇ '
- the DNA encoding the amino acid sequence of 1,6-fucosyltransferase is DNA having the nucleotide sequence represented by SEQ ID NO: 5 or 6, DNA having the nucleotide sequence represented by SEQ ID NO: 5 or 6. And DNA encoding a protein that hybridizes under stringent conditions and has 1,6-fucosyltransferase activity.
- DNA that hybridizes under stringent conditions refers to, for example, DNA such as ⁇ A consisting of the nucleotide sequence represented by SEQ ID NO: 1, 3, 5, or 6, or a fragment thereof.
- DNA refers to DNA obtained by using the colony 'hybridization method, plaque' hybridization method or the southern hybridization method, and more specifically, DNA derived from koDney or plaque. After hybridization at 65 ° C in the presence of 0.7-1.0 M sodium chloride using a filter on which DNA was immobilized, 0.1- to 2-fold concentration of SSC solution
- the composition of a 1 ⁇ concentration SSC solution is composed of 150 sodium chloride and 15 mM sodium citrate.
- the DNA which can be identified by washing the filter at 65 ° C. can be mentioned. Neubridization is described in Molecular Cloning, A Laboratory Manual, Second Edition, Co Id Spring Harbor Laboratory Press, 1989 (hereinafter abbreviated as "Molecular” 1 ⁇ ⁇ Cloning 2nd Edition), Current Protocols in Molecular Biology, John Wiley & Sons, 1987-1997 (hereafter abbreviated as current protocol 'in' molecular biology), DNA Clonin 1: Core Techniques, A Practical Approach, Second Edition, Oxford University (1995), etc. It can be performed according to the method that has been performed.
- DNA that can hybridize under stringent conditions Specifically, DNA having at least 60% or more homology with the nucleotide sequence represented by SEQ ID NO: 1, 3, 5, or 6, preferably 70% or more, more preferably 80% or more, still more preferably DNAs having a homology of 90% or more, particularly preferably 95% or more, and most preferably 98% or more can be mentioned.
- the amino acid sequence represented by SEQ ID NO: 2 or 4 comprises an amino acid sequence in which one or more amino acids are deleted, substituted, inserted and / or added, and is used for the synthesis of intracellular sugar nucleotide GDP-fucose.
- a protein having an associated enzymatic activity, or an amino acid sequence represented by SEQ ID NO: 8 or 8 in which one or more amino acids are deleted, substituted, inserted and / or added, and 1,6-fucosyl A protein having transferase activity is described in Molecular Cloning, 2nd Edition, Current-Protocols, Molecular, BioBio, Nucleic Acids Research, 10, 6487 (1982), Proc. Natl. Acad.
- the number of amino acids to be deleted, substituted, inserted and / or added is one or more.
- the number of amino acids is not particularly limited, but the number of amino acids may be deleted or substituted by a well-known technique such as the site-directed mutagenesis method described above. Alternatively, the number is such that it can be added, for example, 1 to several tens, preferably 1 to 20, more preferably 1 to 10, and still more preferably 1 to 5.
- the present invention also comprises an amino acid sequence having 80% or more homology with the amino acid sequence represented by SEQ ID NO: 2, 4, 7 or 8, and comprises: ⁇ GDP-mannose 4,6-dehydrase activity;
- proteins having 4-keto-6-dexoxy-D-mannose-3,5-epimerase activity or ⁇ 1,6-fucosyltransferase activity specifically, proteins having SEQ ID NOs: 2, 4, and 7, respectively, are used.
- an amino acid sequence represented by 8 and analysis software such as' BLAST [J. Mol, Biol., 215, 403 (1990)] or FASTA CMethods in Enzymology, 183, 63 (1990)].
- proteins having a homology of at least 80% or more, preferably 85% or more, more preferably 90% or more, further preferably 95% or more, particularly preferably 97% or more, and most preferably 99% or more. be able to.
- the host cell used in the present invention that is, an enzyme involved in the synthesis of intracellular sugar nucleotide GDP-fucose, or N-glycol-linked complex type sugar chain reducing terminal N-acetylglucosamine at the 6th position of fucose
- Any method can be used as a method for obtaining a host cell in which an enzyme involved in sugar chain modification to be bound is inactivated, as long as it can inactivate the target enzyme.
- a method of inactivating the above-mentioned enzyme is a method of inactivating the above-mentioned enzyme.
- any lectin that can recognize the sugar chain structure may be used.
- I A misaligned lectin can also be used.
- lentil lectin LCA from Lens Culinaris: Lentil Agglutinin
- enduma lectin PSA Pea Lectin from Pi sum sativum
- Zebra bean lectin VFA Agglutinin from Vicia faba
- Evening lectin ML Lectin derived from Aleuria aurantia
- Lectin-resistant cells are cells whose growth is not inhibited even when an effective concentration of lectin is given.
- the effective concentration is a concentration at which cells before the genomic gene is modified (hereinafter also referred to as a parent strain) cannot grow normally, and preferably a concentration at which the cells before the genomic gene is modified cannot grow.
- the concentration is the same, more preferably 2 to 5 times, further preferably 10 times, most preferably 20 times or more.
- the effective concentration of lectin that does not inhibit growth may be appropriately determined depending on the cell line, and the effective concentration of normal lectin is 10 g / mL to 1 Omg / mL, preferably 0.5 mg / mL to 2.Omg / mL. mL.
- the host cells for producing the antibody composition of the present invention include any cells as long as they can express the antibody composition of the present invention.
- Examples include yeast, animal cells, insect cells, plant cells, and the like. These cells include those described in 1 below. Particularly, among animal cells, CH0 cells derived from Chinese hamster ovary tissue, rat myeloma cell line YB2 / 3HL.. P2.Gll .16Ag.20 cells, mouse Myeloma cell line NS0 cell, mass myeloma cell line SP2 / 0-Agl4 cell, SHK hamster kidney-derived BHK cell, antibody-producing hybridoma cell, human leukemia cell line Namalba cell, embryonic stem cell, fertilized egg cell, etc. preferable.
- transformant of the present invention examples include a CH0 cell line derived from Chinese hamster ovary tissue into which the anti-CCR4 antibody gene of the present invention has been incorporated, and a transformant Ms705 / CCM derived from CH0 / DG4 cells.
- Cells that produce the antibody composition of the present invention are prepared by preparing a host cell to be used for producing the antibody composition of the present invention by the method described below. It can be prepared by introducing a gene encoding an anti-human CCR4 antibody by the method described in 2 below. ⁇
- the host cell used for the production of the cell of the present invention may be an enzyme involved in the synthesis of intracellular sugar nucleotide GDP-fucose or fucose at position 6 of N-acetylglucosamine at the N-glycoside-linked complex type sugar chain reducing end. It can be prepared by targeting the gene of an enzyme involved in glycosylation at the 1-position and using a gene disruption method.
- enzymes involved in the synthesis of intracellular sugar nucleotide GDP-fucose include GDP-mannose 4,6-dehydrase (hereinafter referred to as GMD), GDP-4-keto-6- Deoxy-D-mannose-3,5-epimelase (hereinafter referred to as Fx).
- GMD GDP-mannose 4,6-dehydrase
- Fx GDP-4-keto-6- Deoxy-D-mannose-3,5-epimelase
- N-glycoside-linked complex type sugar chain Specific examples of enzymes involved in sugar chain modification at
- the genes referred to here include DNA or RNA.
- the method of gene disruption includes any method that can disrupt the gene of the target enzyme.
- Examples include the antisense method, ribozyme method, homologous recombination method, RNA-DNA oligonucleotide method (hereinafter referred to as RD0 method), RNA interference method (hereinafter referred to as RNAi method), retro Examples include a method using a virus, a method using a transposon, and the like. Hereinafter, these will be described specifically.
- the host cell used for preparing the cell of the present invention is an enzyme involved in the synthesis of intracellular sugar nucleotide GDP-fucose. Alternatively, it targets the enzyme gene involved in sugar chain modification in which position 1 of fucose is linked to position 6 of N-acetylglycosamine at the reducing end of N-glycoside-linked complex type sugar chain, and Cell Engineering, 1, 239 (1993) ), Bio / Technology, 1L 1097-(1999), Hum. Mol.
- Intracellular sugar nucleotide Enzyme involved in the synthesis of GDP-fucose or N-glycoside bond complex Enzyme involved in sugar chain modification in which position 1 of fucose is ⁇ -linked to position 6 of N-acetylglucosamine at the reducing end of the sugar chain Prepare cDNA or genomic DNA encoding
- position 1 of fucose is located at position 6 of N-acetylglucosamine at the reducing end of the enzyme or N-glycoside-linked complex type sugar chain involved in the synthesis of intracellular sugar nucleotide GDP-fucose.
- a recombinant DNA fragment is prepared by inserting the prepared DNA fragment or its full length downstream of the promoter 'of an appropriate expression vector. I do.
- a transformant is obtained by introducing the recombinant vector into a host cell suitable for the expression vector.
- Intracellular sugar nucleotide Enzyme involved in the synthesis of GDP-fucose or N-glycoside-linked complex type Enzyme involved in sugar chain modification in which position 1 of fucose is attached to position 6 of N-acetylglucosamine at the reducing end of the sugar chain
- a host cell used for preparing the antibody composition of the present invention can be obtained.
- a host cell used for producing the antibody composition of the present invention can also be obtained. .
- the host cells used to prepare the antibody composition of the present invention include yeast, animal cells, insect cells, plant cells, and other enzymes involved in the synthesis of the target intracellular sugar nucleotide, GDP-fucose.
- 1-fucose at position 6 of N-acetylglucosamine at the reducing end of N-glycoside-linked complex type sugar chain Any of those having a gene for an enzyme involved in sugar chain modification at which a position is bonded can be used. Specific examples include the host cells described in 2 below.
- An expression vector that is capable of autonomous replication in the above host cells or that can be integrated into the chromosome, and that contains a designed antisense gene or a promoter at a position capable of transcribing a ribozyme is used. Used. Specifically, the expression vector described in 2 below can be mentioned.
- the method for introducing a recombinant vector suitable for various host cells described in 2 below can be used.
- '' Enzyme involved in the synthesis of intracellular sugar nucleotide GDP-fucose or N-glycoside-linked complex type Involves in sugar chain modification in which position 1 of fucose is linked to position 6 of N-acetylglucosamine at the reducing end of sugar chain
- Methods for selecting a transformant using the activity of the enzyme as an index include, for example, the following methods.
- Intracellular sugar nucleotide Enzyme involved in the synthesis of GDP-fucose, or N-glycoside-linked complex type Involves in sugar chain modification in which position 1 of fucose is linked to position 6 of N-acetylglucosamine at the reducing end of sugar chain
- Methods for selecting cells in which the enzyme has been inactivated are described in the literature [Shinsei Kagaku Kenkyusho 3 I, Glycoprotein (Tokyo Kagaku Dojin), The Japanese Biochemical Society (1988)], and the literature [Cell Engineering, Separate Volume, Experimental Protocol.
- a method for selecting a 'transformant using the sugar chain structure of a glycoprotein on a cell membrane as an index' includes, for example, the method described in 1 (5) below.
- Methods for selecting a transformant using the sugar chain structure of the produced antibody molecule as an index include, for example, the methods described in 4 or 5 below.
- Intracellular sugar nucleotide Enzyme involved in the synthesis of GDP-fucose or ⁇ ⁇ -glycoside-linked complex type Enzyme involved in sugar chain modification in which position 1 of fucose is linked to position 6 of ⁇ ⁇ -acetylglycosamine at the reducing end of sugar chain
- a method for preparing a cDNA encoding the following are the methods described below.
- Intracellular sugar nucleotide Enzyme involved in the synthesis of GDP-fucose or N-glycoside-linked complex Involves in sugar chain modification in which position 1 of fucose is linked to position 6 of N-acetylglycosamine at the reducing end of sugar chain Based on the amino acid sequence of the enzyme Using the cDNA library type I as the type I, the fucose position is the 6th position of the enzyme involved in the synthesis of intracellular sugar nucleotide GDP-fucose or the N-acetylglucosamine at the reducing end of the N-glycoside-linked complex type sugar chain by PCR. Obtain a gene fragment encoding an enzyme involved in sugar chain modification to bind.
- a cDNA library is screened and the enzyme involved in the synthesis of the intracellular sugar nucleotide GDP-fucose or the N-glycoside-linked complex type sugar chain reducing terminal at the 6-position of N-acetylglycosamine DNA encoding an enzyme involved in sugar chain modification at which position 1 of fucose binds can be obtained.
- the mRNA of human or non-human animal tissues or cells may be commercially available (eg, Clontech) or may be prepared from human or non-human animal tissues or cells as follows.
- guanidine thiocyanate-cesium trifluoroacetate method Method for preparing total RNA from human or non-human animal tissues or cells.
- AGPC Guanidine acid thiocyanate 'Phenol' Cloth form
- mRNA can be prepared by using a commercially available kit such as Fast Track mRNA Isolation Kit (Invitrogen II) or Quick Prep mRNA Purification Kit (Pharmacia).
- a cDNA library is prepared from the prepared human or non-human animal tissue or cell mRNA.
- Methods for preparing a cDNA library include methods described in Molecular Cloning 2nd Edition, Current 'Protocols. in' Molecular 'Biology, A Laboratory Manual, 2nd Ed. (1989), or commercially available kits. For example, a method using a Superscript Plasmid System for cDNA Synthesis and Plasmid Cloning (Life Technologies), a method using a ZAP-cDNA Synthesis Kit (STRATAGENE) and the like can be mentioned.
- any phage vector, plasmid vector, or the like can be used as long as it can replicate autonomously in E. coli K12 strain.
- ZAP Express [STRATAGENE, Strategies, 5, 58 (1992)], pBlescript II SK (+) [Nucleic Acids Research, 17, 9494 (1989) ], ⁇ ZAP II (STRATAGENE), human gtlO, Agtll [DNA cloning, A Practical Approach], ⁇ , 49 (1985)], ATriplEx (Clontech), AExCell (Pharmacia), pT7T318U (Pharmacia), pcD2 [Molecula mono-cellular 'biology (Mol. Cell; Biol,)' 280 (1983)] and pUC18 [Gene, 33, 103 (1985)] Can be given.
- Escherichia coli As a host microorganism for producing a cDNA library, any microorganism can be used, but Escherichia coli is preferably used. Specifically, Escherichiacoli XLl-Blue MRF '[STRATAGENE, Strategies, 5, 81 (1992)], Escherichiacoli C600 [Genetics,! £, 440 (1954)], Escherichia coli Y1088 [ Science, 222, 778 (1983)], Escherichia coli Y1090 [Science, 222, 778 (1983)], Escherichiacoli ⁇ 522 [Journal of the 'Molecular' Bio mouth (J. Mol.
- the cDNA library may be used as it is for subsequent analyses, but the Oligocap method developed by Sugano et al. [Gene, JJ8, 171 (1994); Gene, ⁇ , 149 (1997); Protein nucleic acid enzyme, 1, 603 (1996); Experimental medicine, 11, 2491 (1993); cDNA cloning (Yodosha) (1 ") 6 ); may be prepared using the method for preparing a gene library (Yodosha) (1994)] and used for the following analysis.
- Intracellular sugar nucleotide Intracellular sugar nucleotide.Enzyme involved in the synthesis of GDP-fucose or N-glycoside complex type Involved in the sugar chain modification in which position 1 of fucose is ⁇ -linked to position 6 of N-acetylglucosamine at the reducing end of sugar chain Based on the amino acid sequence of the enzyme, a digitizing primer specific to the base sequence at the 5 ′ end and 3 ′ end of the base sequence predicted to encode the amino acid sequence was prepared and prepared.
- the obtained gene fragment is an enzyme involved in the synthesis of intracellular sugar nucleotide GDP-fucose or a sugar chain modification in which the 1-position of fucose is ⁇ -linked to the 6-position of N-acetylglucosamine at the N-glycoside-linked complex type sugar chain reducing end
- DNA encoding an enzyme involved in the enzyme can be determined by a commonly used nucleotide sequence analysis method, for example, the dideoxy method of Sanger et al. [Proceedings of the National Science Academy of Sciences]. Proc. Natl. Acad. Sci. USA), J74, 5463 (1977)] or ABI PRISM377 DNA Sequencer (manufactured by Applied Biosystems).
- a cDNA or cDNA library synthesized from mRNAs contained in tissues or cells of human or non-human animals is used to obtain colony-high, bleeding and plaque-hybridization (molecular cloning). 2nd edition).
- Etc. the position of fucose at the 6th position of the enzyme involved in the synthesis of intracellular sugar nucleotide GDP-fucose or N-acetylglycosamine at the N-glycoside-linked complex type sugar chain reducing terminal It is possible to obtain DNA of an enzyme involved in sugar chain modification, which binds to the enzyme.
- the enzyme involved in the synthesis of intracellular sugar nucleotide GDP-fucose or the sugar chain modification in which position 1 of fucose is linked to position 6 of N-acetylglucosamine at the reducing end of N-glycoside-linked complex type sugar chain PCR was performed using the primers used to obtain the gene fragments encoding the enzymes to be synthesized, and using the cDNA or cDNA library synthesized from the mRNA contained in the tissues or cells of human or non-human animals as type III.
- Amplification by using the enzyme to participate in the synthesis of intracellular sugar nucleotide GDP-fucose or a sugar in which position 1 of fucose binds to position 6 of N-acetylglucosamine at the reducing end of N-glycoside-linked complex type sugar chain CDNA of an enzyme involved in chain modification can also be obtained.
- nucleotide sequence of the DNA encoding the enzyme involved in the modification can be determined by a commonly used nucleotide sequence analysis method, for example, the dideoxy method of Sanger et al. [Proceedings of Ob. The National. Natl. Acad. Sci. U.S.A.), 74, 5463 (1977)] or ABI PRISM377 DNA Sequencer (manufactured by Applied Biosystems).
- the nucleotide sequence of the DNA can be determined. :
- the obtained DNA is included in the genes in the database.
- Enzymes involved in the synthesis of intracellular sugar nucleotides GDP-fucose or in sugar chain modification in which position 1 of fucose is linked to position 6 of N-acetylglucosamine at the reducing end of N-glycoside-linked complex type glycan Can be confirmed.
- the nucleotide sequence of a gene encoding an enzyme involved in the synthesis of intracellular sugar nucleotide GDP-fucose obtained by the above method includes, for example, the nucleotide sequence of SEQ ID NO: 1 or 3.
- the nucleotide sequence of a gene encoding an enzyme involved in sugar chain modification in which fucose is linked to position 1 of fucose at position 6 of N-glycoside-linked complex type sugar chain reduced end N-acetylglycosamine obtained by the above method For example, the base sequence described in SEQ ID NO: 5 or 6 can be mentioned.
- DNA synthesizer such as del 392 (manufactured by Perkin Elmer) using the phosphoramidite method to obtain intracellular sugar nucleotides GDP-fucose. It is also possible to obtain cDNAs of enzymes involved in the synthesis of N-glycosides or enzymes involved in glycosylation in which fucose is linked to position 6 of N-acetylglucosamine at the reducing end of N-glycoside-linked complex type sugar chains. it can. '
- Intracellular sugar nucleotide Enzyme involved in the synthesis of GDP-fucose or N-glycoside-linked complex type Enzyme involved in sugar chain modification in which position 1 of fucose is attached to position 6 of N-acetylglucosamine at the reducing end of the sugar chain
- Examples of the method for preparing the genome marauder A include the method described below. For genomic DNA preparation method
- genomic DNA examples include known methods described in Molecular Cloning, Second Edition, Current Protocols in 'Molecular' Biology, and the like.
- genomic DNA library screening system Genetic Systems
- Universal GenomeWalker TM Kits CL0NTECH
- an enzyme or N-glycoside bond involved in the synthesis of intracellular sugar nucleotide GDP-fucose It is also possible to obtain genomic DNA of an enzyme involved in sugar chain modification in which position 1 of fucose is bonded to position 6 of N-acetylglycosamine at the reducing end of the complex type sugar chain.
- nucleotide sequence of the DNA encoding the enzyme to be converted can be determined by a commonly used nucleotide sequence analysis method, for example, the dideoxy method of Sanger et al. [Proceedings of Ob. Acad, Sci. U.S.A.), 74, 5463 (1977)], or ABI PRISM377 DNA Sequencer (Applied Biosystems). The nucleotide sequence can be determined.
- the obtained DNA is included in the genes in the database.
- a homology search program such as BLAST to search base sequence databases such as Genbank, EMBL, and DDBJ.
- An enzyme involved in the synthesis of intracellular sugar nucleotide GDP-fucose or a sugar chain modification in which position 1 of fucose is ⁇ -linked to position 6 of N-acetylglucosamine at the N-glycoside-linked complex type sugar chain reducing end Can be confirmed.
- DNA synthesizer such as a DNA synthesizer model 392 (manufactured by Perkin Elmer) using the phosphoramidite method to obtain the intracellular sugar nucleotide GDP- ⁇ -
- a DNA synthesizer model 392 manufactured by Perkin Elmer
- phosphoramidite method to obtain the intracellular sugar nucleotide GDP- ⁇ -
- genomic DNA of an enzyme involved in the synthesis of glycan or an enzyme involved in sugar chain modification in which fucose is attached to position 6 of N-acetylglucosamine at the reducing end of N-glycoside-linked complex type sugar chain You can also.
- nucleotide sequence of the genomic DNA of the enzyme involved in the synthesis of the intracellular sugar nucleotide GDP-fucose obtained by the above method examples include the nucleotide sequences of SEQ ID NOS: 9, 10, 11 and 12.
- the nucleotide sequence of the genome ⁇ A of the enzyme involved in sugar chain modification in which the 6-position of fucose is attached to the 6-position of N-acetylglycosamine at the reducing end of the N-glycoside-linked complex type sugar chain obtained by the above method is
- the base sequence described in SEQ ID NO: 13 can be mentioned.
- the first position of fucose is located at the sixth position of N-acylglucosamine at the reducing end of the enzyme involved in the synthesis of the intracellular sugar nucleotide GDP-fucose or the N-glycoside-linked complex type sugar chain without using an expression vector.
- a host used to prepare the antibody composition of the present invention by directly introducing an antisense oligonucleotide or ribozyme designed based on the nucleotide sequence of an enzyme involved in ⁇ -linked sugar chain modification into a host cell You can also get cells.
- the antisense oligonucleotide or ribozyme can be prepared by a known method or a DNA synthesizer. Specifically, the sugar that binds the 1-position of fucose to the 6-position of the enzyme involved in the synthesis of the intracellular sugar nucleotide GDP-fucose or the ⁇ -acetylglycosamine at the reducing end of the ⁇ -glycoside-linked complex type sugar chain.
- Oligonucleotide sequence having a sequence corresponding to consecutive 5 to 150 bases, preferably 5 to 60 bases, more preferably 10 to 40 bases in the base sequence of cDNA and genomic DNA encoding the enzyme involved in chain modification Based on the information, it can be prepared by synthesizing an oligonucleotide (antisense oligonucleotide) corresponding to a sequence complementary to the oligonucleotide or a ribozyme containing the sequence of the oligonucleotide.
- oligonucleotide antisense oligonucleotide
- oligonucleotide derivatives examples include oligo RNA and derivatives of the oligonucleotide (hereinafter, referred to as oligonucleotide derivatives).
- Oligonucleotide derivatives include oligonucleotide derivatives in which the phosphodiester bond in the oligonucleotide has been converted to a phosphorothioate bond, and phosphoric diester bonds in the oligonucleotide have become N3'-P5'phosphamidate bonds.
- Oligonucleotide derivative Oligonucleotide derivative in which ribose and phosphodiester bond in oligonucleotide are converted to peptide nucleic acid bond, Peracyl in oligonucleotide is replaced with C-5 propynylperacyl Oligonucleotide derivatives, derivatives in which peracyl in oligonucleotides are substituted with C-5 thiazole peracyl, oligonucleotide derivatives in which cytosines in oligonucleotides are substituted with C-5 propynylcytosine, o In the oligonucleotides Oligonucleotides in which tocin has been replaced with phenoxazine-modified cytosine Derivatives, oligonucleotide derivatives in which the report in the oligonucleotide is substituted with 2'-0-propylribose, and oligonucleotide derivatives in
- the host cell used to prepare the antibody composition of the present invention may be an enzyme involved in the synthesis of intracellular sugar nucleotide GDP-fucos or the N-glycidylamine at the 6-position of N-acetylglucosamine at the reducing end of the complex N-glycoside-linked sugar chain.
- the target gene on the chromosome can be prepared by modifying the chromosome using the homologous recombination method, targeting the gene of an enzyme involved in sugar chain modification in which position 1 of fucose is cc-linked.
- Intracellular sugar nucleotides enzymes involved in the synthesis of ⁇ -fucose or N-glycoside-linked complex-type enzymes involved in sugar chain modification in which position 1 of fucose binds to position 6 of N-acetylglycosamine at the reducing end of sugar chains Prepare genomic DNA for
- the target gene to be modified for example, an intracellular sugar nucleotide GDP-an enzyme involved in the synthesis of fucose or a fucose at position 6 of N-acetylglycosamine at the N-glycoside-linked complex type sugar chain reducing end.
- a target vector for homologous recombination of a structural gene or a promoter gene of an enzyme involved in sugar chain modification in which position 1 is ⁇ -linked is prepared.
- the cells of the present invention are prepared.
- One host cell can be prepared.
- host cells examples include yeast, animal cells, insect cells, and plant cells, such as enzymes involved in the synthesis of target intracellular sugar nucleotides, GDP-fucose, or ⁇ ⁇ -glycoside-linked complex type sugar chain reducing ends.
- Any cetylglucosamine can be used as long as it has a gene for an enzyme contributing to sugar chain modification in which position 1 of fucose is bonded to position 6 of cetyl.
- Specific examples include the host cells described in 2 below.
- Intracellular sugar nucleotide Enzyme involved in the synthesis of GDP-fucose or ⁇ ⁇ -glycoside-linked complex type Enzyme involved in sugar chain modification in which position 1 of fucose is linked to position 6 of ⁇ ⁇ -acetylglycosamine at the reducing end of sugar chain
- Examples of the method for preparing genomic DNA include the method for preparing genomic DNA described in (1) (a) above.
- the nucleotide sequence of the genomic DNA of the enzyme involved in the synthesis of the intracellular sugar nucleotide GDP-fucose obtained by the above method includes, for example, the nucleotide sequences of SEQ ID NOS: 9, 10, 11 and 12.
- SEQ ID NOS: 9, 10, 11 and 12 As the base sequence of the genome MA of an enzyme involved in sugar chain modification in which the 6-position of fucose is attached to the 6-position of N-acetylglucosamine at the reducing end of N-glycoside-linked complex type sugar chain obtained by the above method, The base sequence described in SEQ ID NO: 13 is exemplified.
- the target vector can be used in either the substitution type or the insertion type.
- the method for introducing a recombinant vector suitable for various host cells described in 3 below can be used.
- Methods for efficiently selecting homologous recombinants include, for example, Gene Targeting, A Practical Approach. IRL Press at Oxford University Press (1993), Biomanual Series 8 Gene Targeting, Mutant Mouse Using ES Cells Methods such as positive selection, motor selection, negative selection, and poly A selection described in Production (Yodosha) (1995) can be used. Methods for selecting the desired homologous recombinants from the selected cell strains include the Southern hybridization method for genomic DNA (Molecular 'Cloning 2nd edition) and the PCR method [PCR-Protocol. Ruz CR Protocols), Academic Press (1990)].
- the host cell used for preparing the antibody composition of the present invention may be an enzyme involved in the synthesis of intracellular sugar nucleotide GDP-fucose or an N-glycoside-linked complex type sugar chain reducing end ⁇ -acetylacetylglucosamine at position 6. It targets the gene of an enzyme involved in glycosylation at the 1-position of fucose and uses the RD0 method. For example, it can be prepared as follows.
- a fucose is added at position 6 of N-acetylacetylglucosamine at the reducing end of the enzyme or N-glycoside-linked complex type sugar chain involved in the synthesis of intracellular sugar nucleotide GDP-fucose.
- the synthesized RD0 is introduced into host cells, and the target enzyme, ie, the enzyme involved in the synthesis of intracellular sugar nucleotide GDP-fucose, or N-acetylglycoscosamine at the reducing end of N-glycoside-linked complex-type sugar chain reducing terminal, is placed at position 6.
- the host cell of the present invention can be prepared by selecting a transformant in which an enzyme involved in glycosylation at the 1-position of fucose is mutated.
- Host cells include yeast, animal cells, insect cells, plant cells, and other target intracellular sugar nucleotides. Enzymes that contribute to the synthesis of GDP-fucose or N-glycoside-linked N-glycosylation at the reducing end of complex-type sugar chains. A The gene for the enzyme involved in sugar chain modification in which the 6th position of fucose is ⁇ -linked to the 6th position of cetylglucosamine Any of them can be used. Specific examples include the host cells described in 2 below.
- RD0 For the introduction of RD0 into various host cells, the method for introducing a recombinant vector suitable for various host cells described in 2 below can be used.
- Intracellular sugar nucleotide Enzyme involved in the synthesis of GDP-fucose or N-glycoside-linked complex type Enzyme involved in sugar chain modification in which position 1 of fucose is attached to position 6 of N-acetylglucosamine at the reducing end of the sugar chain
- Examples of the method for preparing the cDNA described in (1) above include the method for preparing the cDNA described in (1) (a) above.
- Intracellular sugar nucleotide Enzyme involved in the synthesis of GDP-fucose or N-glycoside-linked complex type Enzyme involved in sugar chain modification in which position 1 of fucose is attached to position 6 of N-acetylglucosamine at the reducing end of the sugar chain
- Examples of the method for preparing the genomic DNA include the method for preparing the genomic DNA described in (1) (b) above.
- the DNA base sequence is digested with an appropriate restriction enzyme or the like, and then subcloned into a plasmid such as BluescriptSK (-) (manufactured by Stratagene) and subjected to a commonly used base sequence analysis method, for example, the dideoxy method of Sanger et al. Procedings of the National Academy of the Sciences (Proc. Natl. Acad, Sci., USA), U, 5463 (1977)], etc., and a base sequence automatic analyzer, for example, It can be confirmed by performing analysis using a base sequence analyzer such as ABI PRISM377 DNA Sequencer (manufactured by Applied Biosystems).
- a base sequence analyzer such as ABI PRISM377 DNA Sequencer (manufactured by Applied Biosystems).
- RD0 can be prepared by a conventional method or by using a DNA synthesizer.
- RD0 is introduced into the host cell, and the target enzyme, an enzyme involved in the synthesis of intracellular sugar nucleotide GDP-fucose, or fucose at position 6 of N-acetylethylglucosamine at the N-glycoside-linked complex type sugar chain reducing terminal
- the target enzyme an enzyme involved in the synthesis of intracellular sugar nucleotide GDP-fucose, or fucose at position 6 of N-acetylethylglucosamine at the N-glycoside-linked complex type sugar chain reducing terminal
- 6-position of the enzyme involved in the synthesis of intracellular sugar nucleotide GDP-fucose or N-acetyldarcosamine at the reducing end of N-glycoside-linked complex type sugar chain as described in the above 1 (1) (a).
- a method of selecting a transformant using the sugar chain structure of the produced antibody molecule as an index described in 4 or 5 below.
- the host cell used to prepare the antibody composition of the present invention may be an enzyme involved in the synthesis of intracellular sugar nucleotide GDP-fucose or N-acetylcycloglucosamine at the 6-position of the N-glycoside-linked complex type sugar chain reducing terminal.
- the RNAi method can be used to target the gene of an enzyme involved in sugar chain modification at which position 1 of fucose binds, for example, as follows.
- Intracellular sugar nucleotide Enzyme involved in the synthesis of GDP-fucose or N-glycoside-linked complex type Enzyme involved in sugar chain modification in which position 1 of fucose is attached to position 6 of N-acetylglucosamine at the reducing end of the sugar chain CDNA is prepared from the above cDNA using the method described in (a) of (1) above.
- 1-position of fucose is ⁇ -linked to 6-position of N-acetylglucosamine, the enzyme involved in the synthesis of intracellular sugar nucleotide GDP-fucose or N-glycoside-linked complex type sugar chain Design an RNAi gene of an appropriate length including a part encoding the enzyme involved in sugar chain modification or a part of the untranslated region.
- a recombinant vector is prepared by inserting the prepared cDNA fragment or its full length downstream of the promoter of an appropriate expression vector.
- a transformant is obtained by introducing the recombinant vector into a host cell suitable for the expression vector.
- Intracellular sugar nucleotide Enzyme involved in the synthesis of GDP-fucose or N-glycoside-linked complex type Involves in sugar chain modification in which position 1 of fucose is linked to position 6 of N-acetyltyldarcosamine at the reducing end of sugar chain
- a host cell used for producing the cell of the present invention can be obtained.
- host cells examples include yeast, animal cells, insect cells, plant cells, and other enzymes that participate in the synthesis of the target intracellular sugar nucleotide, GDP-fucose, or the N-glycan at the N-glycoside-linked complex type sugar chain reducing end.
- Any cetylglucosamine can be used as long as it has a gene for an enzyme involved in sugar chain modification in which position 1 of fucose is attached to position 6 of cetylglucosamine.
- Specific examples include the host cells described in 2 below.
- RNAi gene As the expression vector, those which can replicate autonomously in the above host cells or can be integrated into the chromosome, and which contain a promoter at a position where the designed RNAi gene can be transcribed are used. Specific examples include the expression vectors described in 2 below.
- a method for introducing a recombinant vector suitable for various host cells described in 2 below can be used.
- Intracellular sugar nucleotide GDP-Activity of enzymes involved in the synthesis of fucose or N-glycoside bond Involved in sugar chain modification in which position 1 of fucose is attached to position 6 of N-acetylglucosamine at the reducing end of complex sugar chains
- the method described in (a) of (1) can be mentioned.
- a method for selecting a transformant using the sugar chain structure of a glycoprotein on a cell membrane as an index for example, the method described in (5) of this section 1 can be mentioned.
- Methods for selecting a transformant using the sugar chain structure of the produced antibody molecule as an index include, for example, the methods described in 4 or 5 below.
- Intracellular sugar nucleotide Enzyme involved in the synthesis of GDP-fucose or N-glycoside-linked complex type Enzyme involved in sugar chain modification in which position 1 of fucose is attached to position 6 of N-acetylglucosamine at the reducing end of the sugar chain
- Examples of the method for preparing the cDNA of the above include the method for preparing the cDNA described in (a) of (1) of this section 1, and the like.
- the first position of fucose is located at the sixth position of the enzyme involved in the synthesis of intracellular sugar nucleotide GDP-fucose or N-acetylglycosamine at the N-glycoside-linked complex type sugar chain reducing end.
- the RNAi gene can be prepared by a conventional method or by using a DNA synthesizer.
- RNAi gene construct is described in [Nature, Sato, «06 (1998); Proceedings of the National Academy of Sciences (Proc. Natl. Acad. Sci. USA), 95. , 15502 (1998); Nature, 395, 854 (1998); Proceedings' Ob 'The National Academy' Ob Science (Proc. Natl. Acad. Sci. USA), 96, 5049 ( 1999); Cell, 95, 1017 (1998); Proceedings of the National Academy of Science (Proc. Natl. Acad. Sci. USA), 96, 1451 (1999); Proceedings of Ob-The National 'Academy' of Ob 'Science (Proc. Natl. Acad. Sci. USA), 95, 13959 (1998); Nature Cell Biol., 70 ( 2000)].
- the host cell used to prepare the antibody composition of the present invention is synthesized using the transposon system described in Nature Genet., 25, 35 (2000), etc., and synthesizes intracellular sugar nucleotide GDP-fucose.
- N-glycoside-linked complex N-acetylglucosamine at the 6-position of fucose at position 6 of the reducing end, or the activity of an enzyme involved in sugar chain modification, or produced antibody molecule or cell membrane
- a host cell used for preparing the cell of the present invention can be prepared. .
- the transposon system is a system in which a foreign gene is randomly inserted into a chromosome to induce mutation, and is usually used as a vector for inducing mutation in a foreign gene contained in a transposon.
- a transposase expression vector for random insertion into the chromosome is simultaneously introduced into the cell.
- transposase Any transposase can be used as long as it is suitable for the sequence of the transposon to be used.
- any gene can be used so long as it can induce mutation in the DNA of the host cell.
- Examples of the host cell include yeast, animal cells, insect cells, plant cells, and other enzymes that are involved in the synthesis of the target intracellular sugar nucleotide GDP-fucose or the N-glycoside-linked complex sugar chain reducing end N- ⁇ .
- Any cetylglucosamine can be used as long as it has a gene for an enzyme involved in sugar chain modification in which position 1 of fucose is bonded to position 6 of cetyl glucosamine.
- Specific examples include the host cells described in 2 below.
- the method for introducing a recombinant vector suitable for various host cells described in 2 below can be used.
- Intracellular sugar nucleotide Enzyme involved in the synthesis of GDP-fucose or N-glycoside-linked complex type Involved in glycosylation in which position 1 of fucose is linked to position 6 of N-acetylglucosamine at the end of sugar chain reduction
- the method described in (a) of (1) of this section 1 can be mentioned.
- Methods for selecting mutants using the sugar chain structure of a glycoprotein on a cell membrane as an index include, for example, the methods described in 4 or 5 below.
- the host cell used to prepare the antibody composition of the present invention may be an enzyme involved in the synthesis of intracellular sugar nucleotide GDP-fucose or N-glycidylamine at the N-glycoside-linked complex type sugar chain reducing terminal at position 6.
- it can be prepared by targeting a gene of an enzyme involved in sugar chain modification in which position 1 of fucose is ⁇ -linked, and introducing a dominant negative form of the enzyme.
- Specific examples of enzymes involved in the synthesis of the intracellular sugar nucleotide GDP-fuco's include GMD and Fx.
- Examples of enzymes involved in sugar chain modification in which the first position of fucose is attached to the sixth position of N-acetylglycosamine at the reducing end of N-glycoside-linked complex-type sugar chain include ⁇ , 6-fucosyl. Examples thereof include transerase and hi-L-fucosidase. ;
- These enzymes are enzymes that catalyze a specific reaction having substrate specificity, and by destroying the active center of such a catalytic enzyme having substrate specificity, these enzymes are A dominant negative body can be produced.
- GMD is used as an example. The production of the dominant negative body is specifically described below.
- a dominant negative body can be prepared by substituting these four amino acids that are responsible for the enzyme activity of GMD. Based on the results of the preparation of a dominant negative form of GMD derived from Escherichia coli, homology comparison and three-dimensional structure prediction based on amino acid sequence information are performed, for example, GMD (SEQ ID NO: 2) derived from CH0 cells. Then, a dominant negative body can be prepared by substituting threonine at position 155, glutamic acid at position 157, tyrosine at position 179, and lysine at position 183 with another amino acid.
- Genes with such amino acid substitutions can be produced using the site-directed mutagenesis method described in Molecular 'Cloning 2nd Edition, Current Protocols' In Molecular' Biology, etc. .
- the host cell used to prepare the antibody composition of the present invention is a molecular cloning using a gene encoding a dominant negative form of the target enzyme prepared as described above (hereinafter abbreviated as a dominant negative form gene).
- a dominant negative form gene a gene encoding a dominant negative form of the target enzyme prepared as described above.
- Intracellular sugar nucleotide Enzyme involved in the synthesis of GDP-fucose or N-glycoside-linked complex type Involved in sugar chain modification in which position 1 of fucose is attached to position 6 of N-acetylglycosamine, which has not been reduced to a sugar chain Prepare a dominant negative body gene for the enzyme.
- a DNA fragment of an appropriate length containing a portion encoding the protein is prepared as necessary.
- a recombinant vector is prepared by inserting the DNA fragment or full-length DNA downstream of the promoter of an appropriate expression vector.
- 'A transformant is obtained by introducing the recombinant vector into a host cell suitable for the expression vector. .
- Intracellular sugar nucleotide Intracellular sugar nucleotide.
- Enzyme activity involved in the synthesis of GDP-fucose or N-glycosidic bond A glycosylation in which fucose is bonded to position 6 of N-acetylglucosamine at the reducing end of complex-type sugar chains.
- a transformant using the activity of the enzyme to be decorated or the sugar chain structure of the produced antibody molecule or the glycoprotein on the cell membrane as an index, a host cell to be used for preparing the cell of the present invention is prepared. be able to.
- host cells include enzymes involved in the synthesis of the target intracellular sugar nucleotide, GDP-fucose, and N-glycans at the N-glycoside-linked complex type sugar chain reducing end, such as enzymes, animal cells, insect cells, and plant cells. Any cetylglucosamine that has a gene for an enzyme involved in sugar chain modification in which position 1 of fucose is bonded to position 6 can be used. Specific examples include the host cells described in 2 below.
- An expression vector that can replicate autonomously in the above host cells or can be integrated into a chromosome and contains a promoter at a position where DNA encoding the dominant negative body of interest can be transcribed is used.
- Specific examples include the expression vectors described in 2 below.
- the method for introducing a recombinant vector suitable for various host cells described in 2 below can be used.
- Complex sugar chain modification in which fucose position 1 is bonded to position 6 of N-acetylglucosamine at the reducing end of complex type sugar chain Examples of a method for selecting a transformant using the activity of the enzyme to be given as an index include the method described in (a) in 1 (1) below.
- a method for selecting a transformant using the sugar chain structure of a glycoprotein on a cell membrane as an index includes, for example, the method described in 1 (5) below.
- Methods for selecting a transformant using the sugar chain structure of the produced antibody molecule as an index include, for example, the methods described in 4 or 5 below.
- the host cell used to produce the antibody of the present invention is an enzyme involved in the synthesis of intracellular sugar nucleotide GDP-fucose or fucose at position 6 of N-acetyldarcosamine at the N-glycoside-linked complex type sugar chain reducing terminal.
- the gene can be prepared by introducing a mutation into the gene of an enzyme involved in sugar chain modification that binds to position 1 and selecting a desired cell line in which the enzyme has been mutated.
- Specific examples of enzymes involved in the combined ⁇ 3 ⁇ 4 of intracellular sugar nucleotide GDP-fucose include GMD and Fx.
- Examples of enzymes involved in sugar chain modification in which fucose is attached to position 6 of N-acetylglucosamine at the reducing end of N-glycoside-linked complex type sugar chain include al, 6-fucosyltransylase. Ferase, ⁇ -L-fucosidase and the like.
- the methods for introducing a mutation into an enzyme include: 1) Involvement in the synthesis of the intracellular sugar nucleotide GDP-fucose from a mutant obtained by treating the parent strain by mutagenesis treatment or a spontaneously occurring mutant.
- Select the desired cell line based on the activity of the enzyme or the activity of the enzyme involved in sugar chain modification in which fucose is linked to position 6 of fucose at position 6 of the reducing end of ⁇ ⁇ -glycoside-linked complex type glycan.
- any treatment can be used as long as it induces a point mutation, deletion or frameshift mutation in the cell line of the parent strain.
- Spontaneously occurring mutants include those that occur spontaneously by continuing subculture under normal cell culture conditions without special mutagenesis treatment. it can.
- Examples of the method for measuring the activity of the enzyme to be performed include the method described in (a) of (1) of this section 1.
- Examples of the method for identifying the sugar chain structure of the produced antibody molecule include the methods described in 4 and 5 below.
- As a method for identifying the sugar chain structure of the glycoprotein on the cell membrane for example, the method described in item 3 (1) of this section can be mentioned.
- the host cell used to produce the antibody of the present invention is an enzyme involved in the synthesis of an intracellular sugar nucleotide, GDP-fucose, which is located at the 6-position of N-acetyl-glucosamine at the N-glycoside-linked complex ⁇ chain reducing end.
- Antisense RNA / DNA technology [Bioscience and Industry,, 322 (1992) ⁇ Chemistry , 681 (1991), Biotechnology, 358 (1992), Trends in Biotechnology, Ifi, 87 (1992) ⁇ Trends in Biotechnology, 152 (1992), Cell Engineering, 1, 1463 (1997)], triple'helix technology [Trends in Biotechnology, 132 (1992)], etc., to suppress transcription or translation of target genes can do.
- enzymes involved in the synthesis of intracellular sugar nucleotide GDP-fucose include GMD and Fx.
- enzymes involved in glycosylation in which fucose is attached to position 6 of N-acetylthiolcommine at the reducing end of N-glycoside-linked complex-type sugar chains are, specifically, 1,6-fucosyltransferase.
- ze-L-fucosidase ze-L-fucosidase.
- the method described in (5) of this section 1 can be mentioned.
- the method for identifying the sugar chain structure of the produced antibody molecule include the methods described in 4 and 5 below.
- the host cell used for preparing the antibody composition of the present invention is a lectin that recognizes a sugar chain structure in which the 6-position of N-acetylglucosamine at the reducing end of the N-glycoside-linked sugar chain and the 1-position of fucose are linked. It can be prepared by using a technique for selecting a strain that is resistant.
- Methods for selecting a lectin-resistant strain that recognizes a sugar chain structure in which the 6-position of N-acetylglucosamine at the reducing end of the N-glycoside-linked sugar chain is linked to the 1-position of fucose include, for example, Somatik -A method using a lectin described in Cell 'and' Molecular 'Genetics (Somatic Cell Mol. Genet.), 12, 51 (1986).
- any lectin can be used as long as it recognizes a sugar chain structure in which the 6-position of ⁇ ⁇ -acetylglycosamine at the reducing end of ⁇ -glycoside-linked sugar chain and the 1-position of fucose are ⁇ -linked.
- Specific examples include lentil lectin LCA (Lenti 1 Agglutinin from LensCulinaris) Endo bean lectin PSA (Pea Lectin from Pi sum sativum), Broad bean lectin VFA (Agglutinin from 3fe from Vicia faba), and Hylochawan Evening lectin ML (Lectin derived from Aleuriaaurantia) and the like can be mentioned. .
- the cells are cultured for 1 day to 2 weeks, preferably 1 day to 1 week in a medium containing the above lectin at a concentration of lg / mL to 1 mg / mL, and the surviving cells are subcultured or colonized.
- a medium containing the above lectin at a concentration of lg / mL to 1 mg / mL By picking up, transferring to another culture vessel, and continuing culturing in a lectin-containing medium, the 6-position of N-acetylglucosamine at the reducing end of the N-glycoside-linked sugar chain of the present invention and the 1-position of fucose are combined.
- a strain that is resistant to a lectin that recognizes the resulting sugar chain structure can be selected.
- the antibody composition of the present invention can be prepared by using the method described in Molecular 'Cloning 2nd Edition, Current' Protocols in Molecular No., Antilogies, Antibodies, A Laboratory manual, Cold Spring Harbor Laboratory , 1988 (hereinafter abbreviated as Antibodies), Monoclonal Antibodies principles and practice, Third Edition, Acad, Press, 1993 (hereinafter abbreviated as Monoclonal Antibodies), Antibody Engineering, A Practical Approach, IRL Press at Oxford University Press, 1996 (hereinafter abbreviated as “antibody engineering”), etc., for example, by expressing in host cells as follows: it can.
- a full-length cDNA of an anti-human CCR4 antibody molecule is prepared, and a DNA fragment of an appropriate length containing a portion encoding the antibody molecule is prepared.
- a recombinant vector is prepared by inserting the DNA fragment or the full length thereof downstream of a promoter of an appropriate expression vector.
- a transformant producing an antibody molecule By introducing the recombinant vector into a host cell suitable for the expression vector, a transformant producing an antibody molecule can be obtained.
- any of yeast, animal cells, insect cells, plant cells and the like can be used as long as it can express the gene of interest.
- N-glycoside-linked sugar chain that binds to the Fc region of the antibody fragment
- Cells can also be used as host cells.
- the expression vector a vector which is capable of autonomous replication in the above-described host cell or capable of integration into a chromosome and containing a promoter at a position capable of transcribing DNA encoding the antibody molecule of interest is used.
- a cDNA or a probe or primer specific to a target body molecule can be obtained from human or non-human animal tissues or cells. It can be prepared using '
- yeast When yeast is used as a host cell, examples of expression vectors include YEP13 (ATCC37115), YEp24 (ATCC37051), and YCp50 (ATCC37419).
- promoters for glycolytic genes such as hexose kinase, PH05 promoter, PGK promoter, GA p promoter, ADH promoter, gal 1 promoter, al 10 promoter, human one Toshodzuku protein promoter, MF monument 1 promoter, CUP 1 promoter and the like can and Ageruko. .
- Examples of the host cell include microorganisms belonging to the genera Saccharomyces, Schizosaccharomyces, Krybetia spp., Trichosporon, Schuniomyces, etc. be able to.
- Any method for introducing a recombinant vector can be used as long as it is a method for introducing DNA into yeast.
- the electoporation method [Methods. Enzymol.], 194, 182 (1990)]
- the Sueloplast method [Proceedings of the National Academy of Sciences, Proc. Natl. Acad. Sci, U.S.A.], 84. 1929 (1978) )]
- Lithium acetate method Journal of Bacteriology (J. Bacteriology), 153, 163 (1983), D. Seedings of the 'National Academy of Sciences' (Pro Natl. Acad. Sci. U.S.A.), 75, 1929 (1978)]. .
- examples of the expression vector include pc'DNAIs pcDM8 (commercially available from Funakoshi), PAGE107 [JP-A-3-22979; Cytoteclmology, 3, 133, (1990)]. ], PAS3-3 [Tokudokihira 2-227075], pCDM8 [Nature, 329, 840, (1987)], pcDNAI / Amp (Invitrogen), pREP4 (Invitrogen), pAGE103 [Journal of Obb] Biochemistry, 101, 1307 (1987)], pAGE210 and the like. Any promoter can be used as long as it can be expressed in animal cells.
- the enhancer of the IE gene of human CMV may be used together with the promoter.
- Host cells include Namalwa cells, which are human cells, COS cells, which are monkey cells, CH0 cells, which are Chinese hamster cells, HBT5637 (Japanese Patent Publication No. 63-299), radiomyeloma cells, and mice. Examples include myeloma cells, Syrian hamster kidney-derived cells, embryonic stem cells, fertilized egg cells, and the like.
- any method for introducing DNA into animal cells can be used.
- an electroporation method [Cytotechnology,, 133 (1990)] ]
- the calcium phosphate method [Tokudakihira 2-227075]
- the ribofection method [Procedures 'ob' the 'National' Academy 'ob' Science (Proc. Natl. Acad. Sci. U.S.A.), 84 7413 (1987)]
- the injection method [manipulating the mouse embryo a laboratory 'manual]
- a method using a particle gun (gene gun) [Patent No. 2606856, Patent No.
- insect cells When insect cells are used as a host, for example, current protocols “in” molecular biology, Baculovims Expression Vectors, A Laboratory Manual, WH Freeman and Company, New York (1992), bio / technology (Bio / Technology) Technology), 6, 47 (1988) and the like.
- the recombinant virus can be further infected to the insect cells to express the protein.
- Examples of the gene transfer vector used in the method include pVL1392, pVL1393, pBlueBacIII (all from Invitorogeii) and the like.
- the baculovirus for example, Autograp a californica nuclear polyhedrosis virus, which is a virus that infects night moth family insects, can be used.
- Insect cells include Sf9 and Sf21, which are ovarian cells of Spodopterafrugiperda [Current Proto-Cornoles-in 'Morequiula-Pyrology-Baculovirus Expression Vectors, A Laboratory Manual, W. H. Freeman and Company, New York (1992)], and Trichoplusiani ovarian cell High 5 (Invitrogen) can be used.
- Methods for co-transferring the above-described expression-introducing vector and the baculovirus into insect cells for preparing a recombinant virus include, for example, the calcium phosphate method (Japanese Patent Laid-Open No. 2-227075), the lipofection method [procedures' Bu. The National 'Academy' Ob 'Sayen (Proc. Nat 1. Acad. Sci. U.S.A.), 84, 7413 (1987)].
- examples of the expression vector include a Ti plasmid, a tobacco mosaic virus vector, and the like.
- any promoter can be used as long as it can be expressed in plant cells, and examples thereof include the 35S promoter of cauliflower mosaic virus (CaMV) and the gene actin 1 promoter—Yuichi.
- Examples of the host cell include plant cells of tobacco, potato, tomato, carrot, soybean, rape, alfalfa, rice, wheat, wheat, and the like.
- any method for introducing DNA into a plant cell can be used.
- agrobacterium Agrobacterium
- WO94 / 00977 the electoral-portion method
- a method using a particle gun (gene gun) Japanese Patent No. 2517813
- Japanese Patent No. 2517813 Japanese Patent No. 2517813
- antibody gene expression methods include secretory production and fusion protein expression between the Fc region and other proteins, etc., according to the method described in Molecular 'Cloning, 2nd edition. But can. -
- the antibody composition can be produced by culturing the transformant obtained as described above in a medium, producing and accumulating the antibody molecule in the culture, and collecting from the culture.
- the method for culturing the transformant in a medium can be performed according to a usual method used for culturing host cells.
- the transformant contains a carbon source, a nitrogen source, inorganic salts, and the like which can be used by the organism, so that the cultivation of the transformant is efficient.
- a natural medium or a synthetic medium can be used as long as the medium can be used as a medium.
- the carbon source may be any as long as the organism can assimilate; glucose, fructose, sucrose, molasses containing these, carbohydrates such as starch or starch hydrolysate, organic acids such as acetic acid and propionic acid, Alcohols such as ethanol and propanol can be used.
- Nitrogen sources include ammonia, ammonium chloride, ammonium sulfate, ammonium acetate, ammonium phosphate, and other inorganic or organic acid ammonium salts, other nitrogen-containing compounds, peptone, meat extract, and yeast extract. Corn steep liquor, casein hydrolyzate, soybean meal and soybean meal hydrolyzate, various fermentation cells and digested products thereof can be used.
- the inorganic salts potassium phosphate monobasic, potassium phosphate dibasic, magnesium phosphate, magnesium sulfate, sodium chloride, ferrous sulfate, man sulfate, copper sulfate, calcium carbonate and the like can be used.
- the culture is usually performed under aerobic conditions such as shaking culture or deep aeration stirring culture.
- the culture temperature is preferably 15 to 40 ° C, and the culture time is usually 16 hours to 7 days.
- the pH is maintained at 3.0 to 9.0.
- the pH is adjusted using inorganic or organic acids, alkaline solutions, urea, calcium carbonate, ammonia and the like.
- an antibiotic such as ampicillin or tetracycline may be added to the medium during the culture.
- an inducer may be added to the medium as necessary.
- an inducer may be added to the medium as necessary.
- isopropyl-/?-D-thiogalactoviranoside or the like is transformed with a recombinant vector using the trp promoter.
- indoleacrylic acid or the like may be added to the medium.
- a commonly used RPMI1640 medium [The Journal of the American 'Medical Association (The Journal of the American' Medical Association)] , 199, 519 (1967)], Eagle's MEM medium [Science, 1, 501 (1952)], Daruko's modified MEM medium [Virology, 8, 396 (1959)], 199 Medium [Proceeding of the Societe for the Biological Medicine], 73, 1 (1950)], Whitten's Medium [Developmental Engineering Experiment Manual-Transgenics] 'How to make mice (Kodansha), edited by Motoya Katsuki (1987)] or a medium obtained by adding fetal bovine serum or the like to such a medium can be used.
- Culturing is usually carried out pH6, 0 ⁇ 8.0, 30 ⁇ 40 ° C, 5% C0 2 present 1 to 7 days under conditions such as lower.
- antibiotics such as kanamycin and penicillin may be added to the medium during the culture.
- TNM-FH medium As a medium for culturing transformants obtained using insect cells as a host, commonly used TNM-FH medium (Pharmingen), SHOO II SFM medium (Life Technologies), ExCell400, ExCel05 (all JRH Biosciences), Grace's Insect Medium [Nature, ⁇ 1, 788 (1962)] and the like can be used.
- the cultivation is usually performed under conditions of pH 6.0 to 7.0, 25 to 30 ° C, etc. for 1 to 5 days.
- an antibiotic such as genyumycin may be added to the medium during the culture.
- a transformant obtained using a plant cell as a host can be cultured with the cell or by dividing the cell into a plant cell or organ.
- a medium for culturing the transformant a commonly used Murashige 'and Skoog (MS) medium, a white (White) medium, or a medium obtained by adding a plant hormone such as auxin or cytokinin to such a medium is used. be able to.
- Cultivation is usually performed at pH 5.0 to 9.0 and 20 to 40 ° C for 3 to 60 days.
- antibiotics such as kanamycin and hygromycin may be added to the medium during the culture.
- a transformant derived from an animal cell or a plant cell having an expression vector incorporating DM encoding an antibody molecule is cultured according to a usual culture method, and the antibody composition is produced and accumulated.
- the antibody composition can be produced by collecting the antibody composition from the culture.
- a method for expressing the antibody gene secretory production, fusion protein expression, and the like can be performed according to the method described in Molecular 'Cloning 2nd edition, in addition to direct expression.
- the method of producing the antibody composition includes a method of producing it in a host cell, a method of secreting it out of the host cell, and a method of producing it on the host cell outer membrane.
- the host cell to be used and the antibody molecule to be produced The method can be selected by changing the structure of
- a DNA encoding an antibody molecule and a DNA encoding a signal peptide suitable for expression of the antibody molecule are inserted into an expression vector using a gene recombination technique, and the expression vector is used as a host cell.
- the desired antibody molecule can be actively secreted out of the host cell.
- the production amount can be increased by using a gene amplification system using a dihydrofolate reductase gene or the like.
- transgenic animal or plant Furthermore, by redifferentiating the cells of the transgenic animal or plant, an individual animal (transgenic non-human animal) or plant (transgenic plant) into which the gene has been introduced is created. Can be used to produce an antibody composition. '
- the transformant is an animal or plant individual
- the animal is bred or cultivated according to a usual method to produce and accumulate the antibody composition, and the antibody composition is collected from the animal or plant individual.
- the antibody composition can be produced. ,, '
- an antibody composition In the case of an animal individual, for example, a transgenic non-human animal into which maraudal A encoding an antibody molecule has been introduced is bred, and the antibody composition is produced and accumulated in the animal, and the antibody composition is extracted from the animal. By collecting the antibody, an antibody composition can be produced. Examples of the place of production and accumulation in the animal include milk of the animal (JP-A-63-309192), eggs, and the like.
- the promoter used at this time any promoter that can be expressed in animals can be used.
- a casein promoter and a casein promoter, which are breast cell-specific promoters can be used. 1; 5 lactoglobulin promoter, whey acidic protein promoter, etc. are preferably used.
- a transgenic plant into which DNA encoding an antibody molecule has been introduced can be prepared by a known method [tissue culture, 0 (1994); tissue culture, 21 (1995)]. ); Cultivation according to Trends in Biotechnology, 15, 45 (1997)], producing and accumulating an antibody composition in the plant, and collecting the antibody composition from the plant.
- a method for producing an antibody composition can be mentioned.
- An antibody composition produced by a transformant into which a gene encoding an antibody molecule has been introduced is, for example, when the antibody composition is expressed in a lysed state in cells, after the culture is completed, the cells are centrifuged. After harvesting and suspending in an aqueous buffer, the cells are disrupted using an ultrasonic disrupter, French press, Mantongaulin homogenizer, Dynomill, etc. to obtain a cell-free extract.
- a normal enzyme isolation and purification method can be used, that is, a solvent extraction method, a salting out method using ammonium sulfate, a desalting method, a precipitation method using an organic solvent, Tylaminoethyl (DEAE)-Sepharose, DIAI0N HPA-75 (manufactured by Mitsubishi Chemical Corporation), etc.
- the cells When the antibody composition is expressed as an insoluble form in the cells, the cells are similarly collected, crushed, and centrifuged to collect the insoluble form of the antibody composition as a precipitated fraction. .
- the recovered insoluble form of the antibody composition is solubilized with a protein denaturant. After diluting or dialyzing the solubilized solution to return the antibody composition to a normal three-dimensional structure, a purified sample of the antibody product can be obtained by the same isolation and purification method as described above. '
- the antibody composition or a derivative thereof can be collected in the culture supernatant. That is, the culture composition is treated by the same method as centrifugation as described above to obtain a culture supernatant, and the antibody composition is obtained from the culture supernatant by using the same isolation and purification method as described above. Can be obtained.
- a humanized antibody expression vector is an expression vector for animal cells into which genes encoding human antibody CH and CL have been incorporated.
- the expression vector for animal cells contains genes encoding human antibody CH and CL. Each can be constructed by cloning.
- the C region of the 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 M ⁇ 1
- the human antibody And the C region of the L chain hereinafter referred to as hC c).
- chromosomal DNA consisting of exons and introns
- cDNA prepared by reverse transcription from mRNA can also be used.
- Any expression vector for animal cells can be used as long as it can incorporate and express a gene encoding the C region of a human antibody.
- PAGE107 Cytotecnology, 3, 133 (1990)
- pAGE103 Journal of J. Biochem., 101, 1307 (1987)]
- pHSG274 [Gene, 27, 223 (1984)]
- pKCR Procedures of the National Academy of Sciences (Proc, Natl. Acad. Sci. USA), 78, 1527 (1981)]
- promoters and enhancers used in expression vectors for animal cells include the early promoter of SV40 and Enhancer [Journal of Biochem., 101 1307 (1987)], Moroni mouse leukemia. LTR of virus [Biochemical and Biophysical 'Research' Communications (Biochem. Biophys. Res. Commun.), 149, 960 (1987)], immunoglobulin ⁇ chain promoter [Cell, 11, 479 ( 1985)] and Enhanser [Cell,, 717 (1983)] '.
- Humanized antibody expression vectors are of the type in which the antibody H-chain and L-chain are present on separate vectors or of the type present on the same vector (hereinafter referred to as tandem type). Either of them can be used, but the ease of construction of a humanized antibody expression vector, the ease of introduction into animal cells, and the balance of antibody H chain and L chain expression in animal cells are balanced. From the viewpoint of the present invention, a vector for expression of a humanized antibody of the evening type is more preferable [J. Immunol. Methods, 167, 271 (1994)].
- tandem humanized antibody expression vectors include pKANTEX93 [Molecularity (Mol. I Thigh dish ol.), 37, 1035 (2000)], ⁇ 18 [Hybridoma, 17, 559 (1998) ].
- the constructed humanized antibody expression vector can be used for expression of a human chimeric antibody and a human CDR-grafted antibody in animal cells. '
- CDNAs encoding non-human animal antibodies can be obtained as follows.
- CDNA is synthesized using mRNA extracted from hybridoma cells producing an antibody that specifically binds to human CCR4 as type III.
- the synthesized cDNA is inserted into a vector such as a phage or a plasmid to prepare a cDNA library.
- a recombinant phage or a recombinant plasmid having a cDNA encoding the H chain V region and a cDNA encoding the L chain V region were obtained. Isolate the recombinant phage or recombinant plasmid containing the phage.
- the entire nucleotide sequence of VH and VL of the target mouse antibody on the recombinant phage or plasmid is determined, and the entire amino acid sequence of VH and VL is deduced from the nucleotide sequence.
- Hybridoma cells producing antibodies of non-human animals that can specifically bind to human CCR4 were immunized with non-human animals using human CCR4 represented by SEQ ID NO: 36 by a well-known method
- Antibodies A hybridoma was prepared from the antibody-producing cells and the myeloma cells of the immunized animal, and then a single cell was prepared in accordance with Laboratory Bottle Laboratory (Antibodies: A Laboratory Manual), Cold Spring Harbor Laboratory, Chapter 14, 1998).
- the cellized hybridomas can be selected, cultured, purified from the culture supernatant, and obtained.
- any animal can be used as long as hybridoma cells can be produced, such as mice, rats, hamsters, and egrets.
- guanidine thiocyanate-trifluor tf cesium acetate method As a method for preparing total RNA from NP cells, guanidine thiocyanate-trifluor tf cesium acetate method [Methods in Enzymol., 154, 3 (1987)] Methods for preparing mRNA from RNA include oligo (dT) -immobilized cellulose column method [Molecular Cloning: A Laboratory Manual], Cold Spring Harbor Lab. Press New York , 1989]. Examples of kits for preparing mRNA from hybridoma cells include Fast Track mRNA Isolation Kit (Invitrogen) and Quick Prep mRNA Purification Kit (Pharmacia).
- any vector can be used as a vector for incorporating a cDNA synthesized from type II mRNA extracted from predoma cells as long as it can incorporate the cDNA.
- ZAP Express [Strategies, 5, 58 (1992)], pBluescript II SK (+) [Nucleic Acids Research, 17, 9494 (1989)], ⁇ II (Stratagene GtlO, human gtll [DNA Cloning: A Practical Approach, I, 49 (1985)], Lambda BlueMid (Clontech), AExCelU pT7T3 18U (Pharmacia) And PCD2 [Molecular 'Cell. Biol.', 3, 280 (1983)] and p (JC18 [Gene, 33, 103 (1985)]]]
- ZAP Express [Strategies, 5, 58 (1992)]
- pBluescript II SK (+) [Nucleic Acids Research, 17, 9494 (1989)]
- ⁇ II Stratagene G
- any Escherichia coli can be used as long as the cDNA library can be introduced, expressed and maintained.
- XLl-BlueMRF ' [Strategies, 5, 81 (1992)], C600 [Genetics, 440 (1954)], Y1088, Y1090 [Science, 1, 778 (1983)] ], ⁇ 522 [Journal of Molecular Biology (J. Mol. Biol '.), 166, 1 (1983)], K802 [Journal of Molecular Biology Mol. Biol.], 16, 118 (1966)] and JM105 [Gene, 38, 275 (1985)].
- Methods for selecting cDNA clones encoding the VH and VL of non-human animal antibodies from the cDNA library include colony hybridization using a probe labeled with an isotope or fluorescence, or a blunt hybridization method.
- the method can be selected according to the "K-hybridization method [Molecular Cloning: A Laboratory Ma 'Manual, Cold Spring Harbor Lab. Press Ne York, 1989].
- Prepare primers and use cDNA or cDNA library as type I PCR [Molecular Cloning: A Laboratory Manual], Cold Spring Harbor Lab. Press New York, 1989; 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 and the like, cloned into a plasmid such as pBluescript SK (-) (Stratagene), and a commonly used nucleotide sequence analysis method, for example, Sanger Reactions such as the dideoxy method [Procedings of the National Academy 'Ob' Science (Proc. Natl. Acad. Sci. 'U.S.A.], 74, 5463 (1977))]
- the base sequence of the cDNA can be determined by performing analysis using an automatic base sequence analyzer, for example, a base sequence analyzer such as ABI PRISM377 DNA Sequencer (manufactured by Applied Biosystems).
- the amino acid sequence of the antibody variable region or the nucleotide sequence of the DNA encoding the variable region is already known.
- the antibody can be produced using the following method.
- the frequency of codon usage [Sequences of Proteins of Immunological Interest] (Sequences of Proteins of Immunological Interest), US Dept. Health and Human Services , 1991] designing a DNA sequence encoding the variable region, synthesizing several synthetic DNAs having a length of about 100 bases based on the designed DNA sequences, and performing PCR by using them. By doing so, DNA can be obtained.
- DNA can be obtained by synthesizing several synthetic DNAs having a length of about 100 bases based on the information and performing PCR using them. . —
- amino acid sequence of VH and VL of the antibody including the secretory signal sequence refer to the amino acid sequence of VH and VL of the known antibody [Sequences of Proteins of Proteins]. of I t logical interest), US Dept. Health and Human Services, 1991], to estimate the length of the secretory signal sequence and the N-terminal amino acid sequence, and to know the subgroup to which the antibody belongs. it can. Further, the amino acid sequence of each CDR of VH and VL can be found in the same manner.
- a cDNA encoding VH and VL of a non-human animal antibody is located upstream of the genes encoding CH and CL of the human antibody in the vector for expressing a humanized antibody described in (1) of Section 2 of this section.
- a human-type chimeric antibody expression vector can be constructed.
- a cDNA encoding VH and VL of a non-human animal antibody can be obtained by combining the nucleotide sequences at the 3 'end of the non-human animal antibodies VH and VL with the 5' end of the CH and CL of the human antibody Ligated to a synthetic DNA comprising a sequence and a recognition sequence for an appropriate restriction enzyme at both ends, and ligated to the vector for expression of a humanized antibody described in (1) of item 2 of this section.
- a human-type chimeric antibody expression vector can be constructed by inserting a gene encoding the CH and CL of the human antibody upstream of the gene so that they are expressed in an appropriate form.
- CDNAs encoding the human CDR-grafted antibody VH and VL can be constructed as follows. First, the amino acid sequences of the VH and VL ⁇ FR of the human antibody to which the 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 FR of human antibody VH and VL, any amino acid sequence can be used as long as it is derived from human antibody. For example, FR amino acid sequences of VH and VL of human antibodies registered in databases such as Protein Data Bank, and common amino acid sequences of subgroups of FR of VH and VL of human antibodies [Sequences 'ob' Health and Human Services, 1991], among others.
- a human-type CDR-grafted antibody having sufficient activity is produced.
- the amino acid sequences of the VH and VL CDRs of the antibody of the target non-human animal are transplanted into the amino acid sequences of the FRs of the selected human antibodies VH 'and VL, and the VH and VL sequences of the human CDR-grafted antibodies are grafted.
- Design the amino acid sequence The frequency of codons found in the nucleotide sequence of the designed amino acid sequence in the antibody gene [Sequences of Proteins of Immunological Interest (Sequences of Proteins of Immunological Interest), US Dept. Health and Human Services, 1991], and design a DNA sequence encoding the amino acid sequence of VH ⁇ S and VL of the human CDR-grafted antibody.
- the amplification product is cloned into a plasmid such as pBluescript SK (-) (manufactured by Stratagene), the nucleotide sequence is determined by the method described in (2) of this section 2, and the desired human CDR-grafted antibody is obtained.
- a plasmid having a DNA sequence encoding the amino acid sequence of VH and VL.
- the human CDR-grafted antibody has a higher antigen-binding activity than the original non-human animal antibody by grafting only the VH and VL CDRs of the non-human animal antibody to the human antibody VH and VL FR. It has been known to decrease [Bi / Techn0L0GY], £, 266 (1991). This is due to the fact that not only the CDRs but also some amino acid residues are directly or indirectly involved in antigen binding activity in the original non-human antibody VH and VL. Residues are different from those of human antibody VH and VL FR
- human-type CDR-grafted antibodies must be able to interact with the amino acid residues involved in direct antigen binding and the CDR amino acid residues in the VH and VL FR amino acid sequences of human antibodies. Identify amino acid residues that act or maintain the antibody's three-dimensional structure and indirectly participate in antigen binding, and derive them from the original non-human animal antibody [BIO / TECHNOLOGY], 9, 266 (1991)].
- the modification of the amino acid residue of FR of VH and VL of a human antibody can be achieved by performing the PCR method described in item 2 (5) of this section using the synthetic DNA for modification.
- the nucleotide sequence of the amplified product after PCR is determined by the method described in (2) of this section 2 to confirm that the desired modification has been made.
- CDNA encoding VH and VL can be inserted to construct a human CDR-grafted antibody expression vector.
- synthetic DNAs used for constructing the human CDR-grafted antibody VH and VL in (5) and (6) of item 2 above appropriate restriction at the 5 'end of the synthetic DNA located at both ends is appropriate.
- the expression vector can be inserted to construct a human CDR-grafted antibody expression vector.
- a humanized quinula antibody and a humanized CDR-grafted antibody (hereinafter collectively referred to as a humanized antibody) ) Can be obtained in a stable manner.
- Examples of a method for introducing a humanized antibody expression vector into animal cells include an electrolysis method [Japanese Patent Laid-Open No. 2-257891; Cytoteclmology, 3, 133 (1990)] and the like.
- any animal cell capable of producing a humanized antibody can be used.
- mouse myeloma cells such as NS0 cells, SP2 / 0 cells, Chinese hamster ovary cells CHO / dhfr-cells, CH0 / DG44 cells, rat myeloma cells YB2 / 0 cells, IR983F cells, and Syrian hammus yuichi Examples include BHK cells derived from the kidney, Namalva cells which are human myeloma cells, and preferably, CH0 / DG44 cells which are Chinese hamster ovary cells, and radiomyeloma YB2 / 0 cells.
- a transformant that stably produces a humanized antibody can be obtained by the method described in Japanese Patent Publication No. 2-257891 (hereinafter referred to as G418 sulfate). And the like.
- RPMI1640 as animal cell culture medium Medium (Nissui Pharmaceutical), GIT medium (Nippon Pharmaceutical), EX-CELL302 medium (JRH), IMDM medium (GIBC0 BRL), Hybridoma-SFM medium (GIBC0 BRL), or these
- FCS fetal calf serum
- a humanized antibody By culturing the obtained transformant in a medium, a humanized antibody can be produced and accumulated in the culture supernatant.
- the amount of humanized antibody produced in the culture supernatant and the antigen-binding activity were determined by enzyme-linked immunosorbent assay (hereinafter referred to as ELISA; Antibodies: A Laboratory Manual), Cold Spring Harbor Laboratory, Chapter 14, 1998, monoclonal antibodies: Principles and Practice (Monoclonal Antibodies: Principles and Practice), Academic Press Limited, 1996] and the like.
- the transformant can increase the amount of humanized antibody produced using a DHFR gene amplification system or the like according to the method disclosed in Japanese Patent Application Laid-Open No. 2-257891.
- Humanized antibodies can be purified from the culture supernatant of the transformant using a protein A column [Antibodies: A Laboratory Manual], Cold Spring Harbor Laboratory, Chapter 8 , 1988, Monoclonal Antipodes: Principle 'Frillez and F .. Lactose (Monoclonal Antibodies: Principles and Practice j, Academic Press Limited, 1996) Also, other purification methods usually used for protein purification can be used, for example, gel filtration, ion exchange chromatography, and the like. Purification can be performed by a combination of purification and ultrafiltration, etc.
- the molecular weight of the purified humanized antibody H chain, L chain or the entire antibody molecule can be determined by SDS-modified polyacrylamide gel electrophoresis [hereinafter, SDS- Notation: PAGE; Nature (227), 227, .680 (1970)] or Western blotting method [Antibodies: A Laboratory Manual] Harbor Laboratory, Chapter 12, 1988, Monoclonal Antibodies: Principles and Practice, Academic Press Limit ed, 1996 ".
- the method for producing the antibody composition using animal cells as a host has been described above.
- yeast, insect cells, plant cells, or animal or plant cells can be produced by the same method as that for animal cells.
- a composition can be manufactured. '
- a cell for expressing the antibody molecule is prepared using the method described in 1 above, and then the cell is cultured.
- the antibody composition of the present invention can be produced by purifying the composition.
- the binding activity to an antigen and the binding activity to an antigen-positive cultured cell line are determined by ELISA and fluorescent antibody methods [Cancer Immunology 'Immunoser. I, thigh unother.), 36, 373 (1993)]. Cytotoxic activity against antigen-positive cultured cell lines can be evaluated by measuring CDC activity, ADCC activity, etc. Kiru [Cancer 'Imnologi-I', Immunotherapy. (Cancer Immunol. I Awakening Mother.), 36. 373 (1993)].
- the safety and therapeutic effect of the antibody composition in humans can be evaluated using an appropriate model of an animal species relatively close to humans such as cynomolgus monkeys. '
- the sugar chain structure of the antibody molecule expressed in various cells can be determined according to the analysis of the sugar chain structure of a normal glycoprotein.
- the sugar chains bound to IgG molecules are composed of neutral sugars such as galactose, mannose and fucose, amino sugars such as N-acetylglycosamine, and acidic sugars such as sialic acid.
- a method such as sugar chain structure analysis using a two-dimensional sugar chain mapping method or the like.
- composition analysis of the sugar chain of the antibody composition neutral sugar or amino sugar is released by performing acid hydrolysis of the sugar chain with trifluoroacetic acid or the like, and the composition ratio can be analyzed.
- the composition ratio can also be analyzed by fluorescence labeling with Maikoko and 2-aminoviridine. Specifically, a sample obtained by acid hydrolysis according to a known method [Agriculative and Biological Chemistry (Agric. Biol. Chem.), 55 (1), 283-284 (1991)] is used. Fluorescence lapelation is achieved by 2-aminopyridylation, and the composition ratio can be calculated by HPLC analysis.
- Structural analysis of the sugar chain of the antibody composition is performed using the dimensional sugar chain mapping method [Analytical Biochemistry-(Anal .. Biochem.), 171, 73 (1988), Biochemistry Experimental Method 23-glycoprotein sugar chain research method (Academic Society Publishing Center) Reiko Takahashi's Ed. (1989)].
- the X-axis indicates the sugar chain retention time or elution position by reverse-phase chromatography
- the X-axis indicates the sugar chain retention time or elution position by normal-phase chromatography. This is a method for estimating the sugar chain structure by plotting and comparing the results with those of known sugar chains.
- an antibody is degraded by hydrazine to release a sugar chain from the antibody, and fluorescent labeling of the sugar chain with 2-aminopyridine (hereinafter abbreviated as ⁇ ) [Journal of “Ob” Biochemistry (J. Biochem. .), 95, 197 (1984)], the sugar chain is separated from excess PA-forming reagent, etc. by gel filtration, and reversed phase chromatography is performed. Next, normal phase chromatography is performed on each peak of the collected sugar chains. Based on these results, the results were plotted on a two-dimensional bran chain map and compared with the sugar chain standard (TaKa3 ⁇ 4a) and the literature [Analytical 'Biochemistry., 171, 73 (1988)]. The sugar chain structure can be estimated from the comparison of the spots.
- mass spectrometry such as MALDI-T0F-MS of each sugar chain can be performed to confirm the structure estimated by the two-dimensional sugar chain mapping method.
- the antibody composition is composed of antibody molecules having different sugar chain structures binding to the Fc region of the antibody.
- the antibody composition of the present invention is characterized in that, among all N-glycoside-linked complex-type sugar chains binding to the Fc region, the proportion of sugar chains in which no N-acetylglucosamine at the reducing terminal of sugar chains is bonded to N-acetylglucosamine Is 100 ° /. And high ADCC activity.
- Such an antibody composition can be identified by using the method for analyzing the sugar chain structure of the antibody component described in 4. above. In addition, it can be identified by using an immunological quantification method using lectin.
- Lectins used to identify the sugar chain structure of antibody molecules include, for example, WGA (wheat-germ agglutinin from T. vulgaris), ConA (concanavalin A from C. ensiformis), and RIC (toxin from R. communis). ), L-PHA (leukoagglutinin from P. vulgaris), LCA (lentil agglutinin from L. culinaris), PSA (Pea lectin from P.
- AAL Aleuria aurantia Lectin
- ACL Amaranthus caudatus Lectin
- BPL Bauhinia purpurea Lectin
- DSL Natural stramonium Lectin
- DBA Dolichos bif lorus Agglutinin
- EBt Elderberry Balk Lectin
- ECL Erythrina cristagalli Lectin
- 'EEL Euonymus europaeus' Lectin
- G ⁇ Nalanine GSL Griffonia simplicifolia Lectin
- HPA Helix pomatia Agglutinin
- HHL Hippeastrum Hybrid Lectin
- Jacalin LTL (Lotus tetragonolobus Lectin)
- LEL Licopersicon esculentum Lectin
- MAL MAL
- a lectin that specifically recognizes the sugar chain structure in which fucose is bound to N-acetylglycosamine at the reducing end of the N-glucoside-linked complex type sugar chain.
- a lectin that specifically recognizes the sugar chain structure in which fucose is bound to N-acetylglycosamine at the reducing end of the N-glucoside-linked complex type sugar chain.
- Specific examples thereof include Lentil Lectin LCA (Lentil Agglutinin from Lens Culinaris) Endomelectin PSA (Pea Lectin from Pis value sativum), Broad bean lectin VFA (AggluUn in from Vicia 'f aba), Hylochawan evening lectin ML (Lectin from Aleuria aurantia) Things can be done. '
- the antibody composition of the present invention specifically binds to human CCR4 and has high antibody-dependent cytotoxicity. Therefore, it is useful in the prevention and treatment of various CCR4-expressing cell-related diseases such as cancer diseases and inflammatory diseases.
- cancer diseases for which treatment with the antibody composition of the present invention is effective include hematologic cancer, particularly leukemia or lymphoma.
- hematologic cancer particularly leukemia or lymphoma.
- Specific examples include adult T-cell leukemia; ATL, mycosis fungoides, Sezari's syndrome, undifferentiated large cell lymphoma, nonspecific T-cell lymphoma, and the like. .
- Inflammatory diseases for which treatment with the antibody composition of the present invention is effective include acute, chronic airway hyperresponsiveness or bronchial asthma, atopic dermatitis including atopic dermatitis, chronic sinusitis, Churg-Strauss syndrome Th2 cell-mediated immune disorders, such as erythema, pemphigus, eosinophilic myocarditis, allergic gastroenteritis, allergic granulomatous vasculitis, allergic rhinitis or hay fever.
- Cancer a malignant tumor, has cancer cells proliferate, for example, in B cell lymphoma, specific B cells abnormally proliferate.
- Ordinary anticancer agents are characterized by inhibiting the growth of cancer cells.
- antibodies with high antibody-dependent cytotoxicity can treat cancer by damaging the cancer cells that express the antigen by a cell-killing effect, and are thus more useful as therapeutic agents than conventional anticancer drugs. It is.
- the antitumor effects of antibody drugs alone are insufficient for cancer treatment drugs, and 'combined therapy with chemotherapy has been performed [Science, 1197 (1998)].
- a stronger antitumor effect of the antibody composition of the present invention alone is recognized, dependence on chemotherapy is reduced, and side effects are reduced.
- inflammatory diseases such as chronic airway irritable asthma, bronchial asthma, atopic dermatitis, allergic rhinitis or hay fever, IL-4, IL-5 and IL- produced from Th2 cells
- Inflammatory cells such as eosinophils and mast cells are proliferated or differentiated by cytokines and chemokines such as 13 and the tissue-injury allergic reaction is produced through the production molecules produced by these inflammatory cells.
- cytokines and chemokines such as 13
- chemokines such as 13
- Inhibitors of inflammatory cells, inflammatory cells and inflammatory biofunctional molecules have been developed, but these therapeutic agents only partially inhibit the function between cytokines, chemokines and inflammatory cells, Is not a typical remedy.
- the antibody composition of the present invention specifically binds to the extracellular region of CCR4 and shows strong cytotoxic activity against CCR4-expressing cells, Th2 is a cell expressing CCR4 in the upstream part of an allergic reaction. It can selectively eliminate cells and suppress the production of IL-4, It-5 and IL-13 from ⁇ 1 ⁇ 2 cells. Therefore, it is useful as a therapeutic agent for the above-mentioned inflammatory diseases.
- the antibody composition of the present invention does not contain an antibody molecule having a sugar chain to which fucose is bound, cytotoxic activity is enhanced. Therefore, it is possible to treat patients with the above-mentioned cancer and inflammation-injected diseases that cannot be cured by an antibody composition containing an antibody molecule having a sugar chain to which fucose is bound.
- diseases such as cancer, bronchial asthma, and chronic sinusitis are difficult to reach the infiltration site of CCR4-expressing cells. Therefore, it is preferable that even a small amount of the drug has a therapeutic effect.
- the antibody composition of the present invention has high ADCC activity even in a small amount, it is useful for treating these diseases.
- the drug containing the antibody of the present invention can be administered alone as a therapeutic agent, it is usually mixed with one or more pharmacologically acceptable carriers to obtain a pharmaceutical preparation. It is desirable to provide as a pharmaceutical preparation produced by any method well known in the art.
- intravenous administration can be preferably used.
- Dosage forms include sprays, capsules, tablets, granules, syrups, emulsions, suppositories, propellants, 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, P -It can be manufactured using preservatives such as 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, hydroxy It can be produced using a binder such as propylcellulose and gelatin, a surfactant such as fatty acid ester, and a plasticizer such as glycerin as additives.
- Formulations suitable for parenteral administration include injections, suppositories, sprays and the like.
- the injection is prepared using a carrier comprising a salt solution, a glucose solution, or a mixture of both.
- a powdered injection can be prepared by freeze-drying the antibody in a conventional manner and adding sodium chloride thereto.
- Suppositories are prepared using carriers such as cocoa butter, hydrogenated fats or carboxylic acids.
- Sprays are prepared using the antibody composition itself or a carrier that does not irritate the oral and respiratory tract mucosa of the recipient, and disperses the antibody composition as fine particles to facilitate absorption.
- the carrier include lactose and glycerin.
- Formulations such as aerosols and dry powders are possible depending on the properties of the antibody composition and the carrier used. In these parenteral preparations, the components exemplified as additives for oral preparations can also be added.
- the dosage or number of administrations varies depending on the intended therapeutic effect, administration method, treatment period, age, body weight, etc., but the amount of the active ingredient is usually 10 g / kg to 20 mg / kg per adult per day.
- Methods of examining the antitumor effect of the antibody composition on various tumor cells include CDC activity measuring methods and ADCC activity measuring methods in in vitro experiments, and in vivo experiments in mice and the like. Examples include the use of tumor systems in experimental animals and antitumor experiments.
- FIG. 1 shows the construction of plasmid pKOFUT8Neo.
- FIG. 2 is a diagram showing the results of genomic Southern analysis of a genomic lockout 'clone obtained by breaking one copy of the FUT8 allele of CH0 / DG44 cells.
- the lanes show, from the left, the molecular weight markers, genomic Southern clones 50-10-104 and the genomic Southern of the parent strain CH0 / DG44 cells.
- FIG. 3 shows the results of genomic Southern analysis of the double knockout clone WK704 in which both FUT8 alleles of CH0 / DG44 cells were disrupted. Arrows indicate the replacement positions of positive fragments detected when homologous recombination has occurred.
- FIG. 4 is a diagram showing the results of genomic Southern analysis of a clone in which a drug resistance gene has been removed from a double knockout clone in which both FUT8 alleles of CH0 / DG44 cells have been disrupted. Lanes are from left to right, molecular weight marker, drug knockout clone 4-5-C3, double knockout clone WK704, double knockout clone 50-10-104 and parental CH0 / DG44 cells, respectively. Genome Southern. .
- FIG. 5 is a schematic diagram showing the expression vector of the prepared anti-CCR4 human CDR-grafted antibody.
- FIG. 6 is a graph showing the reactivity of the purified MS705 / CCR4 antibody and DG44 / CCR4 antibody to the CCR4 partial peptide in the ELISA method, which was measured by changing the antibody concentration.
- the horizontal axis shows the antibody concentration, and the vertical axis shows the absorbance at each antibody concentration. Mouth indicates DG44 / CCR4 antibody, and ⁇ indicates Ms705 / CCR4 antibody. -FIG.
- FIG. 7 shows the results of measuring the ADCC activity of purified MS705 / CCR4 antibody and DG44 / CCR4 antibody on human CCR4 high-expressing cells (CCM / EL-4) with varying antibody concentration.
- the horizontal axis shows the antibody concentration, and the vertical axis shows the cytotoxic activity at each antibody concentration.
- * Indicates the DG44 / CCR4 antibody, and ⁇ indicates the Ms705 / CCR4 antibody.
- FIG. 8 shows the CCM of an anti-CCR4 human CDR-grafted antibody composition prepared by adding 0-300 ng / mL DG44 / CCR4 antibody or Ms705 / CCR4 antibody to 3.7 ng / mL ⁇ Ms705 / CC! Antibody.
- FIG. 3 is a view showing in vitro ADCC activity on / EL4 cells. The vertical axis of the graph shows the cytotoxic activity, and the horizontal axis shows the concentration of the added antibody.
- ⁇ is an antibody composition prepared by adding Ms705 / CCR4 antibody to 3.7 ng / mL Ms705 / CCR4 The activity of each is shown. * In the figure indicates the percentage of antibodies with sugar chains with sugar chains to which fucose does not bind among the antibody compositions prepared by adding the DG44 / CC antibody to the 3.7 ng / mL Ms705 / CCR4 antibody. Shows 20% or more of the antibody composition. '
- FIG. 9 shows the in vitro ADCC activity on CCM / EL4 cells of the antibody composition consisting of the Ms705 / CCR4 antibody alone and the antibody composition obtained by mixing the Ms705 / CCR4 antibody with a 9-fold amount of the DG44 / CC antibody.
- FIG. The vertical axis of the graph shows the cytotoxic activity.
- the numbers shown on the horizontal axis of the graph indicate the concentration of the Ms705 / CCR4 antibody (ng / mL :), the concentration of the added DG44 / CCR4 antibody (ng / mL :), and the total antibody concentration (ng / mL) from the top. It shows.
- the mouth indicates the activity of the antibody composition consisting of the MS705 / CCR4 antibody alone
- the open square indicates the activity of the antibody composition obtained by mixing the Ms705 / CCR4 antibody with a 9-fold amount of the DG44 / CCR4 antibody.
- a CH0 / DG44 cell line deleted of the genomic region containing the translation initiation codon of both FUT8 alleles was constructed by the following procedure.
- the DNA fragment was purified by phenol / chloroform extraction and ethanol precipitation.
- 0.1 kg of the I fragment (about 1.6 Kb) derived from pKOSelectNeo and a fragment (about 10.1 Kb) derived from pKOFUT8Puro obtained above were added to sterile water to make 5 L, and Ligation High ( The ligation reaction was performed by adding 5 / L and reacting at 16 ° C for 30 minutes.
- Escherichia coli DH5 strain was transformed using the reaction solution, plasmid DNA was prepared from each of the obtained ampicillin-resistant clones, and attached using Big Dye Terminator Cycle Sequencing Ready Reaction Kit v2.0 (Applied Biosystems).
- pKOFUT8Neo shown in FIG. 1 was obtained.
- pK0FUT8Neo was used as a targeting vector to generate a minoprotein cell line for the FUT8 gene of CH0 cells.
- CH0 / DG44 cells derived from Chinese hamster ovary deficient in the dihydrofolate reductase gene (dhfr) [Somatic Cell and Moleculer Genetics, 12, 555, 1986] contain the Chinese hamster FUT8 genomic region constructed in section 1 of Example 1.
- the targeting vector pKOFUT8Neo was introduced as follows.
- pKOFUT8Neo was linearized by digestion with restriction enzyme I (manufactured by New England Biolabs), and the linearized 4 pK0FUT8Neo was transferred to 1.6 ⁇ 10 6 CH0 / DG44 cells by electoral port poration method [Cytotechnology ( Cytotechnology), 3, 133 (1990)], IMDM-dFBS (10) -HT (1) [dialysis FBS (Invitrogen) 10%, HT supplement (Invitrogen) 1x concentration And then inoculated into a 10 cm dish for adherent cell culture (Falcon).
- Diagnosis of homologous recombination of the G418-resistant clone obtained in this section (1) was performed by PCR using genomic DNA as follows.
- a freezing medium [20% DMSOs 40% fetal serum, 40% IMDM] was added to each well and suspended.
- Half of the cell suspension in each gel was seeded on a flat-bottom 96-well plate for adherent cells (manufactured by Asahi Techno Glass Co., Ltd.) to prepare a replica plate, and the other half was frozen and stored as a master plate.
- Neomycin-resistant clones on the replica plate IMDM containing G418 at a concentration of 600 zg / mL -.
- IMDM containing G418 at a concentration of 600 zg / mL -.
- cells were harvested, From the recovered cells, genomic DNA of each clone was prepared according to a known method [Analytical Biochemistry, 201, 331 (1992)], and 30 L of TE-RNase buffer (pH 8. 0)
- the primer used for genomic PCR was designed as follows. First, from the sequence of the FUT8 genomic region (SEQ ID NO: 13) obtained by the method described in Example 12 of WO03 / 31140, primers represented by SEQ ID NO: 39 or SEQ ID NO: 40 were used as forward primers. In addition, a primer (SEQ ID NO: 41 or SEQ ID NO: 42) that specifically binds to the loxP sequence of the evening vector was used as a reverse primer and used in the following polymerase chain reaction (PCR).
- reaction solution was subjected to 0.8% (w / v) agarose gel electrophoresis, and a strain in which a homologous and approximately 1.7 Kb specific amplification product generated by recombination was recognized was determined as a positive clone.
- Diagnosis of homologous recombination of the positive clones obtained in this section (2) was carried out as follows by Southern blotting using genomic DNA.
- genomic DNA of each clone was prepared according to a known method [Nucleic Acids Research, 3, 2303, (1976)], and 150 ⁇ L each of TE-RNase buffer ( ⁇ 80 ⁇ ) overnight.
- a probe used for a Southern plot was prepared as follows. From the sequence of the FUT8 genomic region (SEQ ID NO: 13) obtained by the method described in Example 12 of W003 / 31140, primers represented by SEQ ID NO: 43 and SEQ ID NO: 44 were prepared, and were subjected to the following PCR. Using.
- the reaction solution was subjected to 1.75% (Wv) agarose gel electrophoresis, and a probe DNA fragment of about 230 bp was recovered using a GENECLEAN Spin Kit (manufactured by BIO 101).
- the resulting probe DNA solution sac Chi 5 ⁇ L, [ «- 32 P] dCTP l, 75MBq and Megaprime DNA Labeling system, and radiolabeled using dCTP (Amersh am Pharmacia Biotech Inc.).
- the hybridization was performed as follows. First, the nylon membrane onto which the genomic DNA digest was transferred was sealed in a roller pot, and 15 mL of hybridization solution (5xSSPE, 50xDen haldt's solution, 0.5% (w / v) SDS, 100 / g / mL salmon sperm) DNA] was added thereto, and prehybridization was performed at 65 ° C for 3 hours. Then, the 32 P-labeled probe DNA was heat-denatured and charged into a bottle, followed by hybridization at 65 ° C.
- hybridization solution 5xSSPE, 50xDen haldt's solution, 0.5% (w / v) SDS, 100 / g / mL salmon sperm
- the nylon membrane was immersed in 50 mL of a primary washing solution [2xSSC_0.1% (w / v) SDS], and washed by heating at 65 ° C for 15 minutes. After repeating the above washing operation twice, the nylon membrane was immersed in 50 mL of a secondary washing solution [0.2 ⁇ SSC-0.1% (w / v) SDS], and washed by heating at 65 ° C. for 15 minutes. After washing, the nylon film was exposed to X-ray film at -80 ° C and developed.
- Fig. 2 shows the results of analysis of the parent strain CH0 / DG44 cells and the positive clone A-geno A of the 50-10-104 strain obtained in this section (2) by this method.
- CH0 / DG44 cells only an approximately 25.5 Kb fragment from the wild-type FUT8 allele was detected.
- the positive clone 50-10-104 strain in addition to a fragment of about 25.5 Kb derived from the wild-type FUT8 allele, a fragment of about 20.0 Kb specific to the homologously recombined allele was detected. Since the ratio of the two fragments was 1: 1, it was confirmed that strain 50-10-104 was a hemi-knockout clone in which one copy of the FUT8 allele was disrupted.
- pK0FUT8Puro is digested with the restriction enzyme MI (New England Biolabs) to linearize it, and 4 ⁇ g of the linearized pKOFUT8Puro is converted to a 1.6 ⁇ 10 6 FUT8 gene into a mino-out clone by electroporation [Site Technology (Cytotechnology), 3, 133 (1990)], suspended in IMDM-dFBS (10) -HT (1), and seeded on a 10 cm dish for adherent cell culture (Falcon).
- MI New England Biolabs
- Diagnosis of homologous recombination of the drug-resistant clone obtained in this section (1) was performed as follows using a Southern blot using genomic DNA.
- each clone in the above plate was subjected to trypsin treatment, and the cells were seeded on a flat-bottomed 24-well plate for adherent cells (manufactured by GRAINA).
- Puromycin (SIGMA Co.) 15 ⁇ G / mL of concentration including IMDM-dFBS (10) - HT (1) was cultured 37 ° C, 1 week at 5% C0 2 incubator within one with
- trypsin treatment was performed, and the cells were seeded on a flat-bottomed 6-well plate for adherent cells (manufactured by GRAINA).
- the plate was cultured at 37 ° C.
- the cloned genomic DNA was prepared and dissolved in 150 LL of TE-RNase buffer (pH 8.0).
- the genomic DNA 12 / g prepared above was digested with the restriction enzyme HI (manufactured by New England Biolabs), and the DNA fragment was recovered using the ethanol precipitation method. Then, a 20 // L TE buffer ( pH 8.0) and subjected to 0.6% (w / v) agarose gel electrophoresis. After the electrophoresis, the genome is transferred to a nylon membrane in accordance with a known method [Proceedings of the National Institute of Science (Proc. Natl. Acad. Sci. USA), 76, 3683, (1979)]. The DNA was transcribed. After the transfer, the nylon film was subjected to a heat treatment at 80 ° C. for 2 hours and fixed.
- HI restriction enzyme
- a probe to be used for a Southern plate was prepared as follows. First, primers (SEQ ID NO: 45 and SEQ ID NO: 46) that specifically bind to a sequence 5 ′ to the FUT8 genomic region contained in the targeting vector were prepared and used in the following PCR.
- the reaction solution was subjected to 1.75% (w / v) agarose gel electrophoresis, and a probe DNA fragment of about 230 bp was purified using GENECLEAN Spin Kit (manufactured by BIO 101) '. 5 ⁇ L of the obtained probe DNA solution was radiolabeled using [Hi- 32 P] dCTP 1.75 MBq and Megaprime DNA Labeling system, dCTP (Amersh am Pharmacia Biotech).
- the hybridization proceeds as follows. First, the nylon membrane onto which the above genomic DNA digest was transferred was sealed in a bottle with a mouthpiece, and 15 mL of a high hybridization solution (5xSSPE, 50x Den haldt's solution, 0.5% (w / v) SDS, ⁇ zg / mL salmon sperm DNA] and prehybridization at 65 ° C for 3 hours, heat-denature the 32 P-labeled probe DNA, and add to a bottle at 65 ° C Hybridization was carried out overnight. After hybridization, the nylon membrane was immersed in 50 mL of a primary washing solution [2xSSC—0.1% (w / v) SDS], and washed by heating at 65 ° C for 15 minutes.
- a high hybridization solution 5xSSPE, 50x Den haldt's solution, 0.5% (w / v) SDS, ⁇ zg / mL salmon sperm DNA
- prehybridization at 65 °
- the membrane was immersed in 50 mL of secondary washing solution [0.2xSSC-0.1% (w / v) SDS] and heated at 65 ° C for 15 minutes for washing. . After washing, the film was exposed to X-ray film at -80 ° C and developed.
- Fig. 3 shows the results of analysis of the genomic DNA of the WK704 strain, one of the puromycin-resistant clones, obtained from the 50-10-104 strain by the method described in this section (1) by this method. .
- a fragment of about 25.5 Kb derived from the wild-type FUT8 allele disappeared, and only a fragment of about 20.0 Kb specific to the homologously recombined allele (indicated by an arrow in the figure) was detected. From these results, it was confirmed that the WK704 strain was a clone in which both FUT8 alleles were disrupted.
- Cre recombinase expression vector pBS185 (manufactured by Life Technologies) was introduced as follows. ⁇ '
- PBS185 was introduced into a 1.6 ⁇ 10 6 FUT8 gene double knockout clone by the electoral-portion method [Cytotechnology, 3, 133 (1990)], and then IMDM-dFBS (10) -HT (1 ) Suspended in 10 mL, and diluted 20,000-fold using the same medium. After seeding the dilutions into adherent cells culture Yoyo 10cm dish (manufactured by Falcon) seven, were cultured between 37 ° C, 10 days in a 5% C0 2 incubator, to form colonies.
- an arbitrary clone is collected on a flat bottom plate for adherent cells (manufactured by Asahi Techno Glass Co., Ltd.) according to a known method [Gene Targeting, Oxford University Press, (1993)].
- adherent cells manufactured by Asahi Techno Glass Co., Ltd.
- the cells were cultured in a 5% CO 2 incubator at 37 ° for 1 week. After the culture, each clone on the plate was trypsinized, and a double volume of a freezing medium [20% DMS0, 40% fetal bovine serum, 0% top DM] was added to each well and suspended.
- Half of the cell suspension in each well was seeded on a flat bottom 96-well plate for adherent cells (manufactured by Asahi Techno Glass Co., Ltd.) to make a replica plate, while the other half was frozen and stored as a master plate.
- the positive clones selected in this section (2) were diagnosed by the following procedure to remove drug-resistant genes by genomic Southern blot. ,
- a probe used for a Southern plot was prepared as shown below.
- the following PC was performed using primers (SEQ ID NO: 4.5 and SEQ ID NO: 46) that specifically bind to the sequence 5 'further than the FUT8 genomic region contained in the Yuichii targeting vector.
- the reaction solution was subjected to 1.7'5% (w / v) agarose gel electrophoresis, and a probe DNA fragment of about 230 bp was purified using a GENECLEAN Spin Kit (manufactured by BIO 101). 5 ⁇ L of the obtained probe DNA solution was subjected to radiation labeling using [Hi- 32 P] dCTP 1.75 MBq and Megaprime DNA Labeling system, dCTP (Amersham Pharmacia Biotech).
- the hybridization was performed as follows. First, the nylon membrane onto which the above genomic DNA digest was transferred was sealed in a roller bottle, and the hybridization solution [5 X SSPE, 50 x Denaldt's solution, 0.5% (w / v) SDS , LOO ⁇ g / mL salmon sperm DNA], prehybridize at 65 ° C for 3 hours, heat denature the 32 P-labeled probe DNA, put into a bottle, and incubate at 65 ° C Redidation was conducted.
- the hybridization solution [5 X SSPE, 50 x Denaldt's solution, 0.5% (w / v) SDS , LOO ⁇ g / mL salmon sperm DNA]
- the nylon membrane was immersed in 50 mL of a primary washing solution [2 ⁇ SSC—0.1% (W / V) SDS], and washed by heating at 65 ° C. for 15 minutes. Repeat the above washing operation once. Repeat, then immerse the nylon membrane in 50 mL of secondary washing solution [0.2 X SSC—0.1% (W / V) SDS] and heat at 65 ° C for 15 minutes And washed. After washing, the film was exposed to X-ray film at -80 ° C and developed. '
- FIG. 4 shows the parent strain CH0 / DG44, cells, the 50-10-104 strain described in section 2 of this example, the WK704 strain described in section 3 of this example, and the WK704 strain from this section ( The results of analyzing the genomic DNA of strain 4-5-C3, which is one of the drug-sensitive clones obtained by the method described in 2), by this method are shown.
- CH0 / DG44 cells only a DNA fragment of about 8.0 Kb derived from the wild-type FUT8 allele was detected.
- DNA fragments of about 9.5K derived from alleles in which homologous recombination occurred were observed.
- the neomycin resistance gene (approximately 1.6 Kb) and the puromycin resistance gene (approximately 1.5 Kb) are further removed from the homologous recombination allele. Only a DNA fragment of about 8.0 Kb was detected. From this result, it was confirmed that the drug resistance gene was removed from the 4-5-C3 strain by Cre recombinase. FUT8 gene double knockout clones from which the drug resistance gene had been removed (hereinafter referred to as FUT8 gene double knockout cells) were obtained in multiple strains other than the 4-5-C3 strain.
- FIG. 5 shows a schematic diagram of the expression vector of the prepared anti-CCR4 human CDR-grafted antibody composition.
- transformant capable of growing on an IMDM-dFBS (10) medium containing G418 at a concentration of 500 g / mL and producing an anti-CCR4 human CDR-grafted antibody was obtained.
- the transformant obtained from the parental CH0 / DG44 cell was named DG44 / CCR4 strain, and the transformant obtained from the FUT8 gene double noquart cell was named Ms705 / CCR4 strain.
- the 1% BSA-PBS was discarded, and the culture supernatant of the transformed strain or various diluted solutions of the antibody purified from the culture supernatant were added with a gel, followed by reaction at room temperature for 1 hour. After the reaction, each pellet was washed with PBS containing Tween 20 at a concentration of 0.05% (hereinafter referred to as Tween-PBS) (manufactured by Wako Pure Chemical Industries, Ltd.), and then diluted with 1% BSA-PBS in 2000-fold.
- Tween-PBS PBS containing Tween 20 at a concentration of 0.05%
- a serum-labeled goat anti-human IgG (H & L) antibody solution (manufactured by American Qualex) was added as a secondary antibody solution at 50 L / ml, and reacted at room temperature for 1 hour. After the reaction, after washing with Tween-PBS, 0.55 g of ABTS substrate solution [2,2'-amino-bis (3-ethylbenzothiazoline-6-sulfonic acid) ammonium (manufactured by Wako Pure Chemical Industries, Ltd.) was added.
- Each of the transformants was suspended in IMDM-dFBS (10) containing H18 at a concentration of 500 ⁇ g / mL, and 30 mL was inoculated into a 182 cm 2 flask (manufactured by Grina Co., Ltd.) and placed in a 5% CO 2 incubator. When the cell density reached confluence, the culture supernatant was removed, the cells were washed with 25 mL of PBS, and 30 mL of EXCELL301 medium (manufactured by JRH Biosciences) was injected.
- the acquired Ms705 / CCR4 strain was transferred to the National Institute of Advanced Industrial Science and Technology (AIST) at the Patent Organism Depositary on September 9, 2003 (1-1, Tsukuba East, Ibaraki, Japan, 1 Chuo No. 6) by FERM BP. Deposited as -8467.
- the binding activity of the DG44 / CCR4 antibody and the MS705 / CCR4 antibody purified in section 3 of the example to the human CCR4 antigen was measured as follows.
- Compound 1 (SEQ ID NO: 38) was selected as a human CCR4 extracellular domain peptide to which an anti-CCR4 human CDR-grafted antibody can react.
- a conjugate with BSA Bovine Serum Albumin (manufactured by Nacalai Tesque, Inc.) was prepared by the following method and used as an antigen for use in activity measurement by ELISA.
- FIG. 6 shows the binding activity of the DG44 / CCR4 antibody and the Ms705 / CCR4 antibody to the CCR4 extracellular region partial peptide. Both antibodies had the same binding activity to the CCM extracellular domain partial peptide.
- the in-cytotoxic activity of the DG44 / CCR4 antibody and the Ms705 / CCR4 antibody obtained in section 3 of Example 2 was measured as follows.
- heparin sodium manufactured by Shimizu Pharmaceutical Co., Ltd.
- the mononuclear cell layer was separated according to the attached instruction manual. After washing by centrifugation three times with RPMI1640-FCS (5) medium, the cells were suspended in the same medium at a concentration of 5 ⁇ 10 6 cells / mL to obtain an effector-one cell solution.
- the plate was centrifuged, and the lactate dehydrogenase (LDH) activity in the supernatant was measured using CytoTox96 Non-Radioactive Cytotoxicity Assay (Promega) according to the attached instructions.
- the absorbance data for spontaneous release of target cells was obtained by using only the medium instead of the Efecta-cell solution and the antibody solution, and the absorbance data of spontaneously released target cells was obtained by using the medium instead of the target cell solution and the antibody solution.
- was obtained by performing the same operation as above using only Absorbance data of total release of target cells was obtained by adding 15 ⁇ L of 9% Triton X-100 solution 45 minutes before the end of the reaction, using the medium instead of the antibody solution and effector cell solution. The operation was performed, and the LDH activity of the supernatant was measured. ADCC activity was determined by the following equation.
- FIG. 7 shows the cytotoxic activity of DG44 / CCR4 antibody and Ms705 / CCR4 antibody on CCR4 / EL4 cells.
- the MS705 / CCR4 antibody showed higher ADCC activity than the DG44 / CCR4 antibody at any antibody concentration.
- the DG44 / CCR4 antibody and MS705 / CCR4 antibody purified in section 3 of Example were analyzed for the composition of neutral sugar and amino sugar as follows.
- the composition ratio of each component was calculated from the peak area of the neutral sugar 'amino sugar component in the mouth file, when the N-acetylglucosamine ratio was set to 4.
- Table 2 shows the percentage of sugar chains in which fucose is not bonded to N-acetylglucosamine at the reducing end of the sugar chain, as calculated from the monosaccharide composition ratio of each antibody. Indicated. For the DG44 / CCR4 antibody, the ratio of sugar chains to which fucose was not bound was 8%. On the other hand, since the peak of fucose was below the detection limit for the MS705 / CCR4 antibody, the proportion of sugar chains to which fucose was not bound was estimated to be (about 100%).
- Antibody name Percentage of sugar chains to which fucose is not bound (%)
- an antibody composition having a sugar chain to which fucose is not bound, and an antibody molecule having a sugar chain to which fucose is not bound Biological activity was compared with that of an antibody compound in which an antibody molecule having a sugar chain to which fucose binds was mixed.
- an anti-CCR4 human CDR-grafted antibody having a sugar chain to which fucose is mixed is mixed with an MS705 / CC antibody, which is an anti-CCR4 human CDR-grafted antibody composition having a sugar chain to which fucose is not bound.
- the change in the cytotoxic activity of the antibody composition was examined as follows.
- the target cell solution prepared in the above (1) 50 L (1 ⁇ 10 4 cells / well) of the target cell solution prepared in the above (1) was dispensed into each well of a 96-well U-shaped bottom plate (manufactured by Falcon). Next, the effector cell solution prepared in (2) was added in an amount of 50 ⁇ L (2 ⁇ 10 5 cells / ⁇ l, the ratio of effector cells to target cells was 20: 1). Furthermore, the Ms705 / CCR4 'antibody and the DG44 / CCR4 antibody were used alone or in a mixture of the two to make a total volume of 150 L, and reacted at 37 ° C for 4 hours.
- an anti-CCR4 human CDR-grafted antibody composition was prepared in which the proportion of the antibody having a sugar chain to which Fucose 'was not bound was changed. ADCC activity was measured.
- an anti-CCR4 human CDR-grafted antibody composition was prepared by adding -300 ng / mL DG44 / CCR4 antibody to 3.7 ng / mL MS705 / CCR4 antibody. The ADCC activity of the prepared antibody composition is shown in FIG.
- an antibody molecule having a sugar chain to which fucose is bound and an antibody molecule having a sugar chain to which fucose is not bound are mixed, an antibody molecule having a sugar chain to which fucose is not bound is also present.
- the antibody composition having a ratio of 20% or more exhibited significantly higher ADCC activity than the antibody composition having the ratio of less than 20%.
- Figure 9 graphically shows the ADCC activity of a 10 ng / mL MS705 / CCR4 antibody sample and an antibody sample obtained by adding 9 ng of 90 ng / mL DG44 / CCR4 antibody to 10 ng / mL Ms705 / CCM antibody. .
- ADCC activity of MS705 / CCR4 antibody was significantly reduced by adding DG44 / CCR4 antibody.
- the ADCC activity of the 10 ng / mL Ms 705 / CCR4 antibody sample was increased even if the antibody concentration of the fan body composition was increased 100 times or more while the abundance ratio of the MS705 / CCR4 antibody and the DG44 / CCR4 antibody was 1: 9.
- the antibody molecule having the sugar chain to which fucose is bound inhibits the ADCC activity of the antibody molecule having the sugar chain to which fucose is not bound. It was revealed that ADCC activity could not be exhibited at the same level as the product. Therefore, the antibody composition of the present invention can treat patients who could not be cured by the conventional antibody composition. ' Industrial availability
- a composition comprising a recombinant antibody molecule that specifically binds to human CCM according to the present invention and has an N-glycoside-linked complex type sugar chain in the Fc region, wherein the N-glycoside-linked complex type sugar chain is the sugar chain.
- An antibody composition comprising a sugar chain in which fucose is not bound to N-acetylglycosamine at the reducing end, a transformant producing the antibody composition, a method for producing the antibody composition, and the antibody composition S drug provided.
- the antibody composition of the present invention has a high activity of damaging cells expressing CCR, it is clinically useful as a medicament for treating diseases associated with CCR such as cancer or inflammatory disease.
- SEQ ID NO: 32-Description of artificial sequence Amino acid sequence of antibody heavy chain variable region
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CA002542037A CA2542037A1 (en) | 2003-10-08 | 2004-10-08 | Composition of antibody capable of specifically binding ccr4 |
EP04773773A EP1688436A4 (en) | 2003-10-08 | 2004-10-08 | ANTIBODY COMPOSITION THAT IS ABLE TO SPECIFY CCR4 SPECIFICALLY |
JP2005514672A JPWO2005035582A1 (ja) | 2003-10-08 | 2004-10-08 | Ccr4に特異的に結合する抗体組成物 |
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Cited By (5)
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WO2009037454A2 (en) | 2007-09-18 | 2009-03-26 | Cancer Research Technology Ltd | Cancer marker and therapeutic target |
JP2014513519A (ja) * | 2010-12-07 | 2014-06-05 | アフィテック リサーチ エイエス | 抗ccr4抗体およびその使用 |
JPWO2014007303A1 (ja) * | 2012-07-06 | 2016-06-02 | 学校法人 聖マリアンナ医科大学 | Htlv−1関連脊髄症患者の治療方法および治療剤 |
WO2017220990A1 (en) | 2016-06-20 | 2017-12-28 | Kymab Limited | Anti-pd-l1 antibodies |
US11492383B2 (en) | 2011-06-24 | 2022-11-08 | Stephen D. Gillies | Light chain immunoglobulin fusion proteins and methods of use thereof |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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AU2013203369B2 (en) * | 2007-09-18 | 2016-06-02 | Cancer Research Technology Ltd | Cancer marker and therapeutic target |
GB0909906D0 (en) | 2009-06-09 | 2009-07-22 | Affitech As | Antibodies |
US10266599B2 (en) | 2010-12-07 | 2019-04-23 | Cancer Research Technology Limited | Antibodies which bind to the human CC chemokine receptor 4 and uses thereof |
CN107881160A (zh) * | 2017-08-11 | 2018-04-06 | 百奥泰生物科技(广州)有限公司 | 一种由基因组被编辑的cho宿主细胞产生的具有独特糖谱的重组抗体及其制备方法 |
Citations (4)
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WO2002031140A1 (fr) * | 2000-10-06 | 2002-04-18 | Kyowa Hakko Kogyo Co., Ltd. | Cellules produisant des compositions d'anticorps |
WO2003018635A1 (en) * | 2001-08-31 | 2003-03-06 | Kyowa Hakko Kogyo Co., Ltd. | Human cdr-grafted antibodies and antibody fragments thereof |
WO2003085107A1 (fr) * | 2002-04-09 | 2003-10-16 | Kyowa Hakko Kogyo Co., Ltd. | Cellules à génome modifié |
WO2003085118A1 (fr) * | 2002-04-09 | 2003-10-16 | Kyowa Hakko Kogyo Co., Ltd. | Procede de production de composition anticorps |
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DK2180007T4 (da) * | 1998-04-20 | 2017-11-27 | Roche Glycart Ag | Glycosyleringsteknik for antistoffer til forbedring af antistofafhængig cellecytotoxicitet |
US6488930B1 (en) * | 1999-01-15 | 2002-12-03 | Millennium Pharmaceuticals, Inc. | Anti-CCR4 antibodies and methods of use therefor |
EP2275541B1 (en) * | 1999-04-09 | 2016-03-23 | Kyowa Hakko Kirin Co., Ltd. | Method for controlling the activity of immunologically functional molecule |
-
2004
- 2004-10-08 AU AU2004279739A patent/AU2004279739A1/en not_active Abandoned
- 2004-10-08 WO PCT/JP2004/015322 patent/WO2005035582A1/ja active Application Filing
- 2004-10-08 CA CA002542037A patent/CA2542037A1/en not_active Abandoned
- 2004-10-08 EP EP04773773A patent/EP1688436A4/en not_active Withdrawn
- 2004-10-08 JP JP2005514672A patent/JPWO2005035582A1/ja active Pending
Patent Citations (4)
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WO2002031140A1 (fr) * | 2000-10-06 | 2002-04-18 | Kyowa Hakko Kogyo Co., Ltd. | Cellules produisant des compositions d'anticorps |
WO2003018635A1 (en) * | 2001-08-31 | 2003-03-06 | Kyowa Hakko Kogyo Co., Ltd. | Human cdr-grafted antibodies and antibody fragments thereof |
WO2003085107A1 (fr) * | 2002-04-09 | 2003-10-16 | Kyowa Hakko Kogyo Co., Ltd. | Cellules à génome modifié |
WO2003085118A1 (fr) * | 2002-04-09 | 2003-10-16 | Kyowa Hakko Kogyo Co., Ltd. | Procede de production de composition anticorps |
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Title |
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YAMANE-OHNUKI N. ET AL.: "Establishment of FUT8 knockout chinese hamster ovary cells: an ideal host cell line for producing completely defucosylated antibodies with enhanced antibody-dependent cellular cytotoxicity", BIOTECHNOL. BIOENG., vol. 87, no. 5, 5 September 2004 (2004-09-05), pages 614 - 622, XP002983153 * |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009037454A2 (en) | 2007-09-18 | 2009-03-26 | Cancer Research Technology Ltd | Cancer marker and therapeutic target |
EP2533047A1 (en) | 2007-09-18 | 2012-12-12 | Cancer Research Technology Ltd | CCR4 as therapeutic target for cancer. |
EP2535716A2 (en) | 2007-09-18 | 2012-12-19 | Cancer Research Technology Limited | Cancer marker and therapeutic target |
JP2014513519A (ja) * | 2010-12-07 | 2014-06-05 | アフィテック リサーチ エイエス | 抗ccr4抗体およびその使用 |
US11492383B2 (en) | 2011-06-24 | 2022-11-08 | Stephen D. Gillies | Light chain immunoglobulin fusion proteins and methods of use thereof |
JPWO2014007303A1 (ja) * | 2012-07-06 | 2016-06-02 | 学校法人 聖マリアンナ医科大学 | Htlv−1関連脊髄症患者の治療方法および治療剤 |
WO2017220990A1 (en) | 2016-06-20 | 2017-12-28 | Kymab Limited | Anti-pd-l1 antibodies |
WO2017220989A1 (en) | 2016-06-20 | 2017-12-28 | Kymab Limited | Anti-pd-l1 and il-2 cytokines |
WO2017220988A1 (en) | 2016-06-20 | 2017-12-28 | Kymab Limited | Multispecific antibodies for immuno-oncology |
Also Published As
Publication number | Publication date |
---|---|
AU2004279739A1 (en) | 2005-04-21 |
EP1688436A1 (en) | 2006-08-09 |
CA2542037A1 (en) | 2005-04-21 |
JPWO2005035582A1 (ja) | 2007-11-22 |
EP1688436A4 (en) | 2009-12-02 |
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