WO2010109924A1 - Lh型二重特異性抗体 - Google Patents
Lh型二重特異性抗体 Download PDFInfo
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- WO2010109924A1 WO2010109924A1 PCT/JP2010/050008 JP2010050008W WO2010109924A1 WO 2010109924 A1 WO2010109924 A1 WO 2010109924A1 JP 2010050008 W JP2010050008 W JP 2010050008W WO 2010109924 A1 WO2010109924 A1 WO 2010109924A1
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
- C07K16/46—Hybrid immunoglobulins
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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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- 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
- C07K16/2803—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against the immunoglobulin superfamily
- C07K16/2809—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against the immunoglobulin superfamily against the T-cell receptor (TcR)-CD3 complex
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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
- C07K16/2863—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 growth factors, growth regulators
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
- C07K16/46—Hybrid immunoglobulins
- C07K16/468—Immunoglobulins having two or more different antigen binding sites, e.g. multifunctional antibodies
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- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2317/00—Immunoglobulins specific features
- C07K2317/10—Immunoglobulins specific features characterized by their source of isolation or production
- C07K2317/14—Specific host cells or culture conditions, e.g. components, pH or temperature
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- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2317/00—Immunoglobulins specific features
- C07K2317/20—Immunoglobulins specific features characterized by taxonomic origin
- C07K2317/24—Immunoglobulins specific features characterized by taxonomic origin containing regions, domains or residues from different species, e.g. chimeric, humanized or veneered
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2317/00—Immunoglobulins specific features
- C07K2317/30—Immunoglobulins specific features characterized by aspects of specificity or valency
- C07K2317/31—Immunoglobulins specific features characterized by aspects of specificity or valency multispecific
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2317/00—Immunoglobulins specific features
- C07K2317/60—Immunoglobulins specific features characterized by non-natural combinations of immunoglobulin fragments
- C07K2317/62—Immunoglobulins specific features characterized by non-natural combinations of immunoglobulin fragments comprising only variable region components
- C07K2317/622—Single chain antibody (scFv)
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2317/00—Immunoglobulins specific features
- C07K2317/60—Immunoglobulins specific features characterized by non-natural combinations of immunoglobulin fragments
- C07K2317/62—Immunoglobulins specific features characterized by non-natural combinations of immunoglobulin fragments comprising only variable region components
- C07K2317/626—Diabody or triabody
Definitions
- the present invention relates to the bispecific antibody and the LH, wherein each polypeptide constituting the humanized diabody type bispecific antibody has an L chain variable region at the N-terminal side (LH type).
- LH type Humanized high-functional bispecific antibodies including diabody-type bispecific antibodies (collectively, these are also simply referred to as “LH-type bispecific antibodies”)
- the present invention relates to a peptide, a nucleic acid encoding the polypeptide, a method for producing the antibody, and a pharmaceutical composition containing them.
- immunotherapy has been used as a safe treatment for cancer (malignant tumors) and rheumatism.
- an antibody that specifically shows cytotoxic activity against cancer is used.
- Antibody drugs composed of such antibodies are recognized as safe and secure with high side effects, low side effects, and high therapeutic effects. On the other hand, it is necessary to produce them using established animal cells. .
- low-molecular-weight antibodies such as single-chain antibodies (scFv) in which the VH and VL domains of an antibody are contained in a single polypeptide chain has become a global trend.
- Such low-molecular-weight antibodies can be produced even in inexpensive E. coli, but there is a concern that the half-life in the body decreases due to the decrease in molecular weight and the duration of drug efficacy decreases.
- a complete antibody such as IgG binds to a target antigen in a multivalent amount, whereas a low-molecular antibody usually has a monovalent valence, so that a decrease in affinity is also a problem.
- Non-Patent Document 1 can be referred to.
- BiTE is a small tandem scFv-type small molecule that links two scFvs together.
- Bispecific antibodies are the only clinical trials (Science.ci2008 Aug 15; 321 (5891): 974-7.).
- this BiTE is prepared using animal cells, yield and production cost are problematic.
- tandem scFv type low molecular bispecific antibodies such as BiTE are difficult to prepare from E. coli soluble fraction although they are small molecules (J Mol Biol. 2003 330 (1): 99- 111.) In fact, BiTE is prepared using animal cells.
- Bispecific antibodies one of the multispecific antibodies, can specifically bind to two different antigens. Research has been actively conducted on the possibility that it can be used as a therapeutic agent having an antitumor effect.
- a diabody (Dabody) is the smallest unit of such a bispecific antibody.
- Each heavy chain (H chain) variable region (V region) (represented as “VH”) derived from the same parent antibody.
- VH and the light chain (L chain) variable region (V region) represented as "VL” VL was devised by utilizing the property of forming a heterodimer by non-covalent bonds with each other ( Non-patent document 2).
- Such diabody-type bispecific antibodies are characterized by low molecular weight (molecular weight of about 60,000), low immunogenicity and high permeability to tumor tissues, and, for example, microorganisms such as Escherichia coli. It can be mentioned that inexpensive mass production is possible, and that functional modification using genetic engineering is easy.
- the present inventors have so far developed a diabody-type bispecific antibody (Ex3) prepared using an anti-human epidermal growth factor receptor 1 (Her1) antibody 528 and an anti-CD3 antibody OKT3, and the antibody as a human. It has been found that a typed diabody-type bispecific antibody (hExh3) has an extremely strong antitumor effect (Patent Document 1). Furthermore, in order to exhibit the above-mentioned excellent effects by comparing with diabody-type bispecific antibodies prepared using other antibodies, humanized 528 antibody and humanized OKT3 antibody are human. It was speculated that the structural stability of the typed variable region itself, and combinations thereof, were very important.
- Patent Document 2 highly functional bispecific antibodies having various structures based on humanized diabody-type bispecific antibodies and the like.
- Non-Patent Document 3 The preparation of bispecific antibodies other than diabody-type bispecific antibodies is described in Non-Patent Document 3 and Non-Patent Document 4 below.
- Japanese Patent No. 3803790 International Publication No. WO2007 / 108152 Pamphlet Rosenburg and Moore (Ed.), “The Pharmacology of Monoclonal Antibodies”, Vol. 113, Springer-Verlag, New York, pp.269-315 (1994) Hollinger, et al., Proc. Natl. Acad. Sci. USA 90, 6444-6448, 1993 Alt M, et.al.
- diabody-type bispecific antibodies such as Ex3 have excellent activity, but are mainly expressed in E. coli and prepared by the unwinding method from the insoluble fraction. At least at the basic research level, the yield is several mg per liter of culture medium (Biochem Soc Trans. 2002 30 (4): 507-11), and sufficient production efficiency has not been obtained yet. Accordingly, there is a need to increase added value as a pharmaceutical, such as cost reduction by reducing the dose, by further enhancing the functionality of the diabody-type bispecific antibody.
- the present inventor has made a diabody-type double comprising the L chain at the N-terminal side in each polypeptide constituting a humanized diabody-type bispecific antibody.
- a specific antibody (LH type diabody type bispecific antibody: LH type Ex3) was developed, and a new method for preparing the antibody from Escherichia coli, particularly its soluble fraction, was found and the present invention was completed.
- BsAb humanized highly functional bispecific antibody
- FIG. 1 Humanized variable region (5L) of L chain of anti-human epidermal growth factor receptor 1 antibody 528 and humanized variable region of heavy chain (OH) of anti-CD3 antibody OKT3 in order from N-terminal to C-terminal
- a diabody-type bispecific antibody comprising a second polypeptide comprising the humanized variable region (5H).
- Anti-human epidermal growth factor receptor 1 antibody 528 H chain humanized variable region (5H) and L chain humanized variable region (5L), and anti-CD3 antibody OKT3 H chain A humanized variable region (OH) and a humanized variable region (OL) of the light chain, and any of the following structures: (I) (5LOH)-(peptide linker)-(OL5H) or (OL5H)-(peptide linker)-(5LOH); (Ii) A humanized diabody-type bispecific antibody composed of two types of single-chain polypeptides (5LOH) and (OL5H) is inserted into one of the single-chain polypeptides via the hinge region.
- An antibody that binds to two Fc regions of a human antibody (Iii) A single chain polypeptide consisting of (5LOH)-(peptide linker)-(OL5H) or (OL5H)-(peptide linker)-(5LOH) binds to two Fc regions of a human antibody via a hinge region
- the humanized highly functional bispecific antibody according to Aspect 2 having the structure of (ii), wherein the humanized diabody type bispecific antibody is hinged via a protease cleavage site.
- the humanized highly functional bispecific antibody wherein the antibody is bound to a region.
- Aspect 4 The humanized highly functional bispecific antibody according to Aspect 2 having the structure of (iii), wherein the single-chain polypeptide is bound to the hinge region via a protease cleavage site.
- the humanized highly functional bispecific antibody characterized by the above.
- Aspect 5 The diabody-type bispecificity according to aspect 1 or 2, wherein the humanized variable region of the L chain and the humanized variable region of the H chain in each single-chain polypeptide are connected by a peptide linker. antibody.
- the humanized variable region (OL) of the L chain of antibody OKT3 and the humanized variable region (OH) of the H chain of anti-CD3 antibody OKT3 are amino acids represented by SEQ ID NOs: 2, 4, 6 and 8, respectively.
- the bispecific antibody according to any one of aspects 1 to 5, consisting of a sequence.
- Aspect 7 A single-chain polypeptide constituting the bispecific antibody according to any one of Aspects 1 to 6.
- Aspect 8] A nucleic acid molecule encoding the single-chain polypeptide according to Aspect 7.
- Aspect 10 A replicable cloning vector or expression vector containing the nucleic acid molecule according to Aspect 8 or 69.
- Aspect 11 The vector according to Aspect 10, which is a co-expression vector.
- Aspect 12 The vector according to Aspect 10 or 11, which is a plasmid vector.
- Aspect 13 A host cell transformed with the vector according to any one of Aspects 10 to 12.
- Aspect 14 A host cell according to Aspect 13, which is a prokaryotic cell.
- Aspect 15 The host cell according to Aspect 14, which is Escherichia coli.
- the prokaryotic cell is Escherichia coli, and two types of single-chain polypeptides are recovered from the culture medium supernatant, perizuma fraction, intracellular soluble fraction, or intracellular insoluble fraction of Escherichia coli. Manufacturing method.
- the method comprises expressing two types of single-chain polypeptides constituting an antibody, forming a diabody-type bispecific antibody in the transformed bacterium, and separating and collecting the formed bispecific antibody. , Said method.
- the humanized highly functional bispecific antibody according to Aspect 3 or 4 is digested with protease to cleave the Fc region and the hinge region, and two types of 5LOH and OL5H, respectively.
- a pharmaceutical composition comprising the bispecific antibody according to any one of Aspects 1 to 6 as an active ingredient.
- [Document Name] Abstract [PROBLEMS] To provide a new diabody-type bispecific antibody that increases the added value as a pharmaceutical, such as cost reduction by reducing the dose by further enhancing the functionality of the bispecific antibody, and a method for producing the same. thing.
- a humanized diabody-type bispecific antibody (LH-type diabody-type bispecific antibody) characterized in that each polypeptide has an L chain on the N-terminal side (LH type), and Humanized high-functional bispecific antibody including LH-type diabody-type bispecific antibody, nucleic acid molecule encoding both two kinds of single-chain polypeptides constituting the bispecific antibody, the nucleic acid
- LH type LH-type diabody-type bispecific antibody
- the LH diabody-type bispecific antibody of the present invention is a high-performance IgG-like bifunctional antibody in which Fc is fused to a humanized diabody-type bispecific antibody (Ex3) previously developed by the present inventors. It has a very high cytotoxic activity equivalent to that of a bispecific antibody (Ex3-scDb-Fc: Patent Document 2). Furthermore, by examining various conditions in the production method, the present inventors have succeeded in preparing a high amount of antibody that is more than double that of various conventional bispecific antibodies from the soluble fraction of bacteria. Furthermore, the humanized highly functional bispecific antibody (LH type BsAb) prepared using the LH type shows higher cytotoxicity than the above LH type diabody type bispecific antibody. It was confirmed.
- LH type diabody type bispecific antibody against A431 cell (ATCC No. CRL-1555) which is a human squamous cell carcinoma cell line, humanized Ex3 described in Patent Document 1 and Patent Document 2
- the result of the cell growth inhibition test by Ex3-scDb-Fc is shown.
- LH type diabody type bispecific antibody against human breast cancer cell line SK-BR-3 cell (ATCC No. HTB-30), humanized Ex3 described in Patent Document 1 and Patent Document 2
- the anti-EGFR antibody-producing mouse B cell hybridoma 528 has been deposited with the Medical Cell Resource Center attached to the Institute of Aging Medicine, Tohoku University (ID: TKG0555). Further, the hybridoma producing the 528 antibody is stored as ATCC No. HB-8509 in the American Type Culture Collection (ATCC) and can be easily obtained from such depository.
- ATCC American Type Culture Collection
- the anti-CD3 antibody OKT3 is also deposited at the Medical Cell Resource Center attached to the Institute for Aging Medicine, Tohoku University (ID: TKG0235).
- the hybridoma producing the OKT3 antibody is stored as ATCC No. CRL-8001 in the American Type Culture Collection (ATCC) and can be easily obtained from such depository.
- cDNA can be prepared by methods known to those skilled in the art. For example, mRNA is extracted using ISOGEN (Nippon Gene), cDNA is prepared by First-Strand cDNA Synthesis Kit (Amersham Biosciences), and reference paper (Krebber, A. et al. Reliable cloning of functional antibody variable domains from hybridomas and spleen cell repertoires employing a reengineered phage display system. J Immunol Methods 201, 35-55. (1997)) PCR was performed using the cloning primers synthesized to determine the sequence of the variable regions of these antibodies. can do.
- “Humanization” of the variable region contained in the single-chain polypeptide constituting the LH-type bispecific antibody of the present invention means determination of complementation in the humanized variable region of human immunoglobulin (recipient antibody).
- CDRs that are non-human animals (donor antibodies) such as mice, rats, or rabbits and have the desired specificity, affinity, and ability in at least some of the residues in region (complementarity-determining region; CDR) Means an antibody substituted by a residue derived from
- human immunoglobulin Fv framework (FR) residues may be replaced by corresponding non-human residues.
- humanized antibodies may comprise residues that are not found in either the recipient antibody and the introduced CDR sequences or framework sequences.
- ⁇ ⁇ Humanization of such antibody humanized variable regions can be performed according to methods known to those skilled in the art.
- humanized antibodies are prepared by analyzing various conceptual humanized products using a three-dimensional immunoglobulin model of recipient and donor antibodies. Three-dimensional immunoglobulin models are well known to those skilled in the art.
- WO92 / 22653 and the like can be referred to.
- humanized humanized variable regions include antibodies in which the complementarity determining region (CDR) in the humanized variable region is derived from a mouse antibody and the other part is derived from a human antibody. it can.
- CDR complementarity determining region
- an appropriate site in the single-chain polypeptide for example, a framework (FR) that may affect the CDR structure.
- the function of the humanized antibody can be improved by causing site-specific mutations in the middle part, for example, canonical or vernier sequences.
- humanization of the 528 humanized variable region was performed by the CDR-grafting method.
- VH and VL homology searches are performed, and the human antibody sequence having the highest homology FR (frame work) is selected in consideration of the length of each CDR (complementarity determining region). It is preferable to design an amino acid sequence in which the CDR of the selected human antibody is replaced with the CDR of 528, and for the corresponding codon, it is preferable to use the E. coli optimal codon as before, and to perform total synthesis of the gene by overlap PCR method I can do it.
- humanized OKT3 humanized variable regions have already been reported and have been confirmed to retain sufficient activity compared to mouse OKT3 (Adair, J. R. et al. Humanization of the murine anti-human CD3 monoclonal antibody OKT3. Hum Antibodies Hybridomas 5, 41-7. (1994)).
- total synthesis of the gene was performed by the overlap PCR method. At this time, it is preferable to use the optimal codon in E. coli, and the increase in the expression level in E. coli by using the total synthetic gene substituted with the optimal codon has already been reported.
- An example of the base sequence of the typing variable region (OH) and the amino acid sequence encoded by it are represented by SEQ ID NOs: 1 and 2, SEQ ID NOs: 3 and 4, SEQ ID NOs: 5 and 6, and SEQ ID NOs: 7 and 8, respectively.
- the L chain humanized variable region and the H chain humanized variable region in each single-chain polypeptide are connected by an appropriate peptide linker.
- the peptide linker makes it difficult for single-chain antibodies to interact with each other in the molecule, and allows the formation of multimers by a plurality of single-chain antibodies, and as a result, VHs derived from different single-chain antibodies.
- VL are appropriately associated, so that the function of the original protein (the polypeptide is derived from the original protein or derived from the original protein), for example, part of biological activity or It is not particularly limited as long as it can take a structure that simulates or promotes all of them, and for example, it is selected from those widely known in the art or modified from the known linker. Is possible.
- the peptide linker is preferably 1 to 20, preferably 1 to 15, more preferably 2 to 10 amino acids in length.
- each single-chain polypeptide may not include the peptide linker described above, and two humanized variable regions may be directly linked.
- the C-terminal of the humanized variable region located on the N-terminal side in each single-chain polypeptide. It is preferable that 1 to several amino acids or 1 to several amino acids at the N-terminal of the humanized variable region on the C-terminal side have been removed.
- amino acid sequence represented by each of the above SEQ ID Nos. An amino acid sequence in which one or several amino acids are substituted, deleted, inserted or added, and the function / activity of the polypeptide comprising the original amino acid sequence
- amino acid sequence substantially retained with the antigen specificity of the humanized variable region can also be used as the polypeptide of the single chain antibody constituting the LH type bispecific antibody of the present invention.
- amino acids that are deleted, substituted, inserted or added are preferably substituted for homologous amino acids (polar / nonpolar amino acids, hydrophobic / hydrophilic amino acids, positive / negative charged amino acids, aromatic amino acids, etc.), Alternatively, it is preferable that amino acid deletion or addition does not cause a significant change in the three-dimensional structure and / or local charge state of the protein or that they are not substantially affected.
- Polypeptides having such deleted, substituted or added amino acids include, for example, site-directed mutagenesis methods (such as point mutagenesis and cassette mutagenesis), gene homologous recombination methods, primer extension methods, and It can be easily prepared by appropriately combining methods known to those skilled in the art such as PCR.
- amino acid sequence in which one or several amino acids are substituted, deleted, inserted or added is 90% or more, preferably 95% or more, more preferably 99% or more, with respect to the total length of the original amino acid sequence. It can also be said to show sequence homology.
- LH type Ex3 scDb The first type (i) of LH type BsAb of the present invention (LH type Ex3 scDb) is represented by (5LOH)-(peptide linker)-(OL5H) or (OL5H)-(peptide linker)-(5LOH). It has a structure. That is, two types of polypeptide chains constituting LH type Ex3, 5LOH and OL5H, are further joined by a peptide linker to form a single polypeptide chain as a whole. As a result, the structure of the BsAb molecule is more stabilized than Ex3. Further, only one expression vector is required for producing this BsAb, and as a result, a more uniform BsAb molecule can be prepared as compared with LH type Ex3. “ScDb” means a single chain diabody antibody.
- the peptide linker is not particularly limited in length or the like as long as OH and OL, and 5H and 5L are associated with each other to form an antigen binding site capable of specifically reacting with each antigen. For example, it is possible to select and use one widely known in the art or a modification of the known linker.
- the peptide linker may be inserted between 5H and 5L, or between OH and OL.
- the second type (ii) of LH type BsAb of the present invention is a humanized diabody type bispecific antibody (LH type) composed of two types of polypeptides, 5LOH and OL5H. Ex3) binds to two Fc regions of a human antibody via a hinge region by either polypeptide. That is, specifically, any one of the two polypeptides constituting Ex3 bound to the Fc region of a human antibody via a hinge region (for example, (OL5H) -hinge region-Fc region), And it is comprised from 2 types of polypeptide of another polypeptide (for example, (5LOH)) which comprises LH type Ex3.
- the antibody can be produced by co-expressing these two types of single-chain polypeptides and then associating them.
- the “Fc region” means two domains (CH2 and CH3) on the C-terminal side of the H chain constituting the constant region (C region).
- LH type Ex3 scDb-Fc LH type Ex3 scDb-Fc
- LH type Ex3 scDb has a structure in which it is bound to the Fc region of a human antibody via a hinge region. That is, the hinge region includes two types of H chain variable regions contained in a single-chain polypeptide consisting of (5LOH)-(peptide linker)-(OL5H) or (OL5H)-(peptide linker)-(5LOH). Alternatively, any of the L chain variable regions may be bound to the hinge region.
- the number of domains constituting the second type (ii) and the third type (iii) of the LH type BsAb of the present invention is the same as that of an IgG type immunoglobulin molecule, and these antibodies are close to the immunoglobulin molecule. It is considered to have a three-dimensional structure. Furthermore, in the second type (ii) and the third type (iii) of these LH type BsAbs of the present invention, these are obtained by interposing a protease cleavage site between the LH type Ex3 or LH type Ex3 scDb and the hinge region.
- LH-type Ex3 or LH-type Ex3DscDb by subjecting the LH-type BsAb to protease digestion and then appropriately performing various purification operations described below.
- LH-type Ex3 or LH-type Ex3bscDb obtained by such protease digestion shows higher cytotoxic activity than those prepared by conventional methods.
- the peptide linker contained in the LH type BsAb of the present invention may be, for example, a polypeptide consisting of 1 to 20 amino acids, preferably a polypeptide consisting of 1 to 15 amino acids, more preferably 2 to 10 amino acids. Polypeptides consisting of the amino acids are mentioned.
- the constant region or Fc region contained in the LH type BsAb of the present invention is not particularly limited as long as it is derived from a human antibody.
- CL may be derived from either ⁇ or ⁇ chain.
- the Fc region or H chain constant region is usually derived from an IgG ⁇ chain.
- CH1, CH2 and CH3, and CL include those having the amino acid sequences shown in SEQ ID NO: 29, SEQ ID NO: 30, and SEQ ID NO: 33 disclosed in Patent Document 2, respectively.
- FIG. 3-4 As representative examples of amino acid sequences such as PreSission sequence, hinge region, peptide linker, signal peptide and the like contained in the single-chain polypeptide constituting the LH type BsAb of the present invention, FIG. The sequences disclosed in 3-4 can be mentioned.
- the PreSission sequence is a sequence containing a protease cleavage site.
- protease There are no particular limitations on the type of protease to be used.
- enzymes known to those skilled in the art such as Thrombin and FactorFXa can be used, and an amino acid sequence including a protease cleavage site can be appropriately selected accordingly. .
- a typical example of a nucleic acid molecule (oligonucleotide) encoding each region or sequence contained in each single-stranded polypeptide of the present invention has the base sequence shown in each of the above SEQ ID NOs.
- a nucleic acid molecule comprising such a base sequence that exhibits a sequence homology of 90% or more, preferably 95% or more, more preferably 99% or more with the entire length of the base sequence described in each SEQ ID NO.
- these nucleic acid molecules are also included in the above-described nucleic acids of the present invention because they are considered to encode polypeptides having substantially the same activity or function as the sequences.
- Such a nucleic acid molecule contains a base sequence encoding at least one of two kinds of single-chain polypeptides constituting the diabody-type bispecific antibody of the present invention. It is preferred that the two types of single-chain polypeptides each contain both base sequences.
- sequence homology between two amino acid sequences or base sequences are pre-processed in an optimal state for comparison. For example, by making a gap in one sequence, the alignment with the other sequence is optimized. Thereafter, the amino acid residues or bases at each site are compared. When the same amino acid residue or base as the corresponding site in the second sequence is present at a site in the first sequence, the sequences are identical at that site. Sequence homology between the two sequences is expressed as a percentage of the total number of sites (all amino acids or all bases) of the number of sites that are identical between the sequences.
- homology refers to each amino acid residue or each base constituting the chain between two chains in a polypeptide sequence (or amino acid sequence) or polynucleotide sequence (or base sequence). It means the amount (number) of things that can be determined to be identical in each other's fitness relationship, and means the degree of sequence correlation between two polypeptide sequences or two polynucleotide sequences. Homology can be easily calculated. Many methods for measuring homology between two polynucleotide or polypeptide sequences are known, and the term “homology” (also referred to as “identity”) is well known to those skilled in the art (eg, , Lesk, A. M.
- Preferred methods for measuring homology include those designed to obtain the largest match between the two sequences being tested. An example of such a method is one assembled as a computer program.
- Preferred computer programming methods for measuring the homology between two sequences include GCG program package (Devereux, J. et al., Nucleic Acids Research, 12 (1): 387 (1984)), BLASTP, BLASTN, FASTA (Atschul, S. F. et al., J. Molec. Biol., 215: 403 (1990)), etc., but are not limited thereto, and methods known in the art are used. be able to.
- each nucleic acid molecule described above hybridizes under stringent conditions with DNA consisting of a base sequence complementary to the DNA consisting of the base sequence represented by each SEQ ID NO. It includes DNA encoding a polypeptide having substantially the same function and activity as the polypeptide.
- hybridization can be carried out according to a method known in the art or a method analogous thereto, such as the method described in Molecular cloning third.ed. (Cold Spring Harbor Lab. Press, 2001). Moreover, when using a commercially available library, it can carry out according to the method as described in an attached instruction manual.
- Hybridization may be performed by a method known in the art, such as the method described in Current Protocols in Molecular Biology (edited by Frederick M, Ausubel et al, 1987), or the like. It can carry out according to the method according to it. Moreover, when using a commercially available library, it can carry out according to the method as described in an attached instruction manual.
- stringent conditions in DNA hybridization are defined by an appropriate combination of salt concentration, organic solvent (eg, formamide), temperature, and other known conditions. That is, stringency increases depending on whether the salt concentration is reduced, the organic solvent concentration is increased, or the hybridization temperature is increased.
- washing conditions after hybridization also affect stringency. This wash condition is also defined by salt concentration and temperature, and the stringency of the wash increases with decreasing salt concentration and increasing temperature.
- “stringent conditions” means that the degree of homology between each base sequence is, for example, about 80% or more, preferably about 90% or more, more preferably about 95% or more on the average on the whole. It means that the hybrid is specifically formed only between base sequences having high homology.
- the conditions include a sodium concentration of 150 to 900 mM, preferably 600 to 900 mM, and a pH of 6 to 8 at a temperature of 60 ° C. to 68 ° C.
- hybridization is performed under conditions of 5 SSC (750 mM NaCl, 75 mM ⁇ trisodium citrate), 1% SDS, 5 x Denhardt solution 50% formaldehyde, and 42 ° C. Washing is carried out under the conditions of 0.1 x SSC (15 mM NaCl, 1.5 mM trisodium citrate), 0.1% SDS and 55 ° C.
- nucleic acid when a nucleic acid encoding a humanized variable region that has been humanized in each single-chain polypeptide is prepared, it can be totally synthesized by an overlap PCR method based on a pre-designed amino acid sequence.
- nucleic acid is a molecule that encodes a single-chain polypeptide
- its chemical structure and acquisition route are not particularly limited, and include, for example, gDNA, cDNA, chemically synthesized DNA, mRNA, and the like. is there.
- telomere can be isolated from a cDNA library by hybridization based on the sequence described in the literature, or by the polymerase chain reaction (PCR) technique.
- the DNA is placed in an expression vector, which is then placed in an E. coli (C. coli) cell, COS cell, Chinese hamster ovary cell (CHO cell), or myeloma cell that does not produce immunoglobulin.
- E. coli C. coli
- COS cell COS cell
- CHO cell Chinese hamster ovary cell
- myeloma cell that does not produce immunoglobulin.
- a host cell can be transfected and a monoclonal antibody synthesized in the recombinant host cell.
- the PCR reaction can be carried out by a method known in the art or a method or modification method substantially similar thereto, for example, R. Saiki, et al., Science, 230: 1350, 1985; R.
- the PCR method can be performed using a commercially available kit suitable for the PCR method, and can also be performed according to a protocol clarified by the kit manufacturer or the kit vendor.
- nucleic acid encoding the single-chain polypeptide constituting the LH-type bispecific antibody of the present invention thus obtained or each region contained in the polypeptide is appropriately selected according to the purpose by means known to those skilled in the art. Alternatively, it can be modified to encode an amino acid. Techniques for genetically modifying or modifying DNA in this way are described in Mutagenesis: a Practical Approach, MJ. Mcpherson (Ed.), (IRL Press, Oxford, UK (1991) ⁇ In the review, for example, site-directed mutagenesis (site-directed mutagenesis), cassette mutagenesis and polymerase chain reaction (PCR) ) Can be mentioned mutagenesis.
- modification of a nucleic acid means insertion, deletion or substitution of a base in at least one codon encoding an amino acid residue in the obtained original nucleic acid.
- altering the amino acid sequence itself constituting a single-chain polypeptide by replacing a codon encoding an original amino acid residue with a codon encoding another amino acid residue.
- a single-chain polypeptide is used so that a codon (optimum codon) suitable for a host cell such as E. coli is used without changing the amino acid itself.
- the encoding nucleic acid can also be modified.
- by changing to an optimal codon it is possible to improve the expression efficiency of the single-chain polypeptide in the host cell.
- the LH type bispecific antibody of the present invention can be produced by a method known to those skilled in the art, for example, various means such as genetic engineering techniques or chemical synthesis.
- genetic engineering techniques for example, a replicable cloning vector or expression vector containing a nucleic acid encoding the polypeptide of each single-chain antibody constituting the bispecific antibody is prepared, and this vector is used as a host. Transforming the cells, culturing the transformed host cells to express the single chain polypeptide in the host cells, recovering and purifying the polypeptide, associating the single chain polypeptides, It can be produced by separating and recovering the formed LH type bispecific antibody.
- replicable expression vector and “expression vector” refer to a piece of DNA (usually double-stranded), in which the DNA contains Can be inserted with foreign DNA fragments.
- Foreign DNA is defined as heterologous DNA, which is a DNA that is not found naturally in the subject host cell.
- Vectors are used to carry foreign or heterologous DNA strands into appropriate host cells. Once in the host cell, the vector can replicate independently of the host chromosomal DNA cage, and several copies of the vector and its inserted (foreign) DNA cage can be generated.
- the vector contains the elements essential to allow translation of the foreign DNA into a polypeptide. Thus, many molecules of polypeptides encoded by foreign DNA can be synthesized rapidly.
- Such vectors are operably linked to an appropriate control sequence so that the DNA sequence is expressed in an appropriate host (ie, to allow expression of foreign DNA). It means a “DNA construct” containing the determined DNA sequence.
- control sequences include a promoter for transcription transcription, any operator sequence to control such transcription, sequences encoding appropriate mRNA ribosome binding sites, enhancers, reardenylation sequences, and transcription and translation. (translation) An array for controlling the end of the cage can be mentioned.
- the vector can appropriately contain various sequences known to those skilled in the art, for example, restriction enzyme cleavage sites, marker genes (selection genes) such as drug resistance genes, signal sequences, leader sequences, and the like as necessary.
- sequences or elements can be appropriately selected and used by those skilled in the art depending on conditions such as the type of foreign DNA, the host cell used, the culture medium, and the like. Further, for the purpose of facilitating the detection and purification of the produced single-chain polypeptide, a sequence encoding various peptide tags known to those skilled in the art (for example, c-myc tag and His-tag) is added. It can be included at the end of the sequence corresponding to this polypeptide.
- the vector can be in any form such as a plasmid, a phage particle, or simply a genomic insert. Once introduced into a suitable host by transformation, the vector can replicate or function independently of the resident genome. Alternatively, the vector may be one that is integrated into the genome.
- any cell known to those skilled in the art can be used.
- typical host cells include prokaryotic cells such as E. coli and Chinese hamster ovary cells (CHO cells).
- Mammalian cells such as rabbits and human-derived cells, and eukaryotic cells such as yeast and insect cells.
- the transformed bacteria can be cultured under any mortgage conditions and methods known to those skilled in the art. For example, by inducing expression with BL21 ⁇ ⁇ star (DE3) strain as a host, 2xYT medium as a medium, IPTG of about 0.5 ⁇ mM at a culture temperature of about 28 ° C, the LH type 2 of the present invention in the culture supernatant or soluble fraction is used. The yield of the bispecific antibody can be greatly improved, and the production efficiency can be increased.
- a single-chain polypeptide obtained by such expression in a host cell is generally recovered from the culture medium as a secreted polypeptide, but if it is produced directly without a secretion signal, the host It can be recovered from cell lysates. If the single-chain polypeptide is membrane-bound, it can be released from the membrane using a suitable detergent (eg, Triton-X100).
- a suitable detergent eg, Triton-X100
- the purification operation can be performed by appropriately combining methods known to those skilled in the art. For example, centrifugation, hydroxylapatite chromatography, gel electrophoresis, dialysis, fractionation on ion exchange columns, ethanol precipitation, reverse phase HPLC, chromatography on silica, chromatography on heparin sepharose, anion or cation It is suitably purified by resin chromatography (polyaspartic acid column etc.), chromatofocusing, SDS-PAGE, ammonium sulfate precipitation, and affinity chromatography. Affinity chromatography is one of the preferred purification techniques with high efficiency utilizing the affinity with a peptide tag of a single-chain polypeptide.
- the purification operation is preferably performed after the single-chain polypeptide is solubilized and denatured.
- This solubilization treatment can be performed using any agent known to those skilled in the art as a dissociating agent such as alcohols such as ethanol, guanidine hydrochloride, and urea.
- the LH type bispecific antibody of the present invention is produced by associating (rewinding) the two kinds of single-chain polypeptides thus purified, and separating and recovering the formed antibody molecules. I can do it.
- the association treatment means that a single single-chain polypeptide is returned to a state having a desired biological activity by returning it to an appropriate spatial arrangement. Therefore, the association treatment also has the meaning of returning the polypeptides or domains to the associated state, so it can also be referred to as “reassociation”, and in the sense of having the desired biological activity. It can also be called reconstruction, or it can be called refolding.
- the association treatment can be performed by any method known to those skilled in the art. For example, the concentration of the denaturing agent (for example, guanidine hydrochloride) in the buffer solution containing the single-chain polypeptide is decreased stepwise by, for example, dialysis. The method is preferred.
- the LH type bispecific antibody of the present invention is prepared from, for example, a culture medium supernatant of a cultured host cell such as Escherichia coli, a perizma fraction, an intracellular soluble fraction, or an intracellular insoluble fraction. Is possible.
- BL21 star (DE3) strain (Invitrogen) is used as the host, and the culture is performed at 28 ° C. using 2 ⁇ YT medium. After overnight shaking culture (OD at 600 nm is approximately 5), expression was induced by IPTG with a final concentration of 0.5 mM, and after culturing for 16 hours, medium supernatant fraction and cells were treated with osmotic pressure The target protein is recovered from this fraction (periplasm fraction).
- the pharmaceutical composition of the present invention contains, as an active ingredient, one selected from the group consisting of the LH-type bispecific antibody of the present invention, a single-chain polypeptide, a nucleic acid, a vector, and a transformed host cell. It is characterized by that. As shown in the following examples, such an active ingredient has an action of significantly eliminating, killing, or damaging (positive) tumor cells expressing the epidermal growth factor receptor in vitro and in vivo. Therefore, the pharmaceutical composition of the present invention can be used as an antitumor agent against such tumor cells.
- the effective amount of the active ingredient of the present invention can be appropriately determined by those skilled in the art depending on, for example, the therapeutic purpose, the type of tumor, the site and size of the subject to be administered, various conditions of the patient, and the administration route.
- a typical single dose or daily dose will depend on the above conditions and, if possible, first in vitro and then, for example, using assays known in the art for tumor cell survival or growth.
- appropriate dose ranges can be determined with appropriate animal models that can extrapolate dose ranges for human patients.
- the pharmaceutical composition of the present invention contains various pharmaceutically acceptable pharmacological agents well known to those skilled in the art in addition to the active ingredient, depending on various conditions such as the type of active ingredient, pharmaceutical form, administration method / purpose, and pathological condition of the administration target.
- Components eg, carriers, excipients, buffers, stabilizers, etc.
- the pharmaceutical composition of the present invention is a tablet, solution, powder, gel, spray, or microcapsule, colloidal distribution system (liposome, microemulsion, etc.), macroemulsion, etc., depending on the above various conditions.
- colloidal distribution system liposome, microemulsion, etc.
- macroemulsion etc.
- administration methods include intravenous, intraperitoneal, intracerebral, intraspinal, intramuscular, intraocular, intraarterial, in particular intrabiliary or intralesional injection or injection, and sustained release system formulations.
- the active substances according to the invention can be administered continuously by infusion or by bulk injection.
- Sustained release formulations are generally of a form from which the active substance of the present invention can be released for a period of time, and suitable examples of sustained release preparations include solid hydrophobic polymers containing proteins.
- a semipermeable carrier is included, which is in the form of a molded product, such as a film or microcapsule.
- the pharmaceutical composition of the present invention is prepared by methods known to those skilled in the art, for example, the Japanese Pharmacopoeia Manual Editorial Committee, 13th revision, Japanese Pharmacopoeia Manual, issued on July 10, 1996, Yodogawa Shoten Co., Ltd. In view of the description, it can be appropriately selected and manufactured from among them.
- the LH type diabody type bispecific antibody of the present invention was prepared as follows.
- the expression vector was prepared as follows based on the already developed humanized diabody-type expression vectors targeting EGFR and CD3 (Patent Document 1 and Reference Examples 1 to 4 of Patent Document 2).
- h5L humanized 5L
- hOH humanized OH
- hOL humanized OL
- h5H humanized 5H
- EH primer humanized 5H
- a NcoI-5L 5'-NNNNCCATGGCCGATATTGTGATGACCCAGAGCCCG-3 ': [SEQ ID NO: 9]
- B 5LSG4 5′-CTGGCCACCGCCACCAGATTTAATTTCCACTTTGGTGCCACCGCC-3 ′
- C SG4OH 5'-AAATCTGGTGGCGGTGGCCAGGTGCAACTGGTGCAGAGCGGC-3 '[SEQ ID NO: 11]
- D OH-SacII 5′-NNNNAGCCGCGGAGCTAACGGTCACCGGGGTGCCCTGGCC-3 ′
- E NcoI-OL 5′-NNNNCCATGGCCGATATTCAGATGACCCAGAGCCCG-3 ′
- F OLSG4 5'-CTGGCCACCGCCACCAGAGGTAATCTGCAGTTTGGTACCCTG-3 '[SEQ ID NO: 14]
- G SG45H 5'-
- a c-myc peptide tag for detection and a His-tag tag (Hisx6: histidine hexamer tag) for purification are introduced in parallel.
- E. coli was transformed with the above co-expression vector, and the transformed bacterium was cultured overnight at 28 ° C. in 2 ⁇ YT medium, and then expression was induced with 0.5 ⁇ mM IPTG.
- the results prepared from the periplasma fraction, soluble fraction and insoluble fraction are shown in FIG. In each figure, the humanized diabody-type bispecific antibody of the present invention thus obtained is indicated as “LH type Ex3”.
- the base sequence of the humanized variable region (OH) of the H chain of the anti-CD3 antibody OKT3 and the amino acid sequence encoded by it are respectively SEQ ID NO: 1 and 2, SEQ ID NO: 3 and 4, SEQ ID NO: 5, respectively. And 6, and those shown in SEQ ID NOs: 7 and 8.
- human squamous cell carcinoma cell line A431 cell (ATCC No. CRL-1555), human breast cancer cell line SK-BR-3 cell (ATCC No. HTB-30), human breast cancer cell line ( Proliferation of MCF7 cells (ATCC No.HTB-22) which is a low EGFR expression strain and TFK-1 which is a human bile cancer cell line (Medical Cell Resource Center ID: TKG036) was inhibited by the LH type diabody-type bispecific antibody, humanized Ex3 described in Patent Document 1 (simply referred to as "Ex3" in the figure) and Ex3- described in Patent Document 2 Comparison with scDb-Fc.
- the cells were counted, adjusted to 5 ⁇ 10 3 cells per 100 ⁇ L of RPMI (10% FBS), dispensed 100 ⁇ L each into a 96-well plate, and allowed to stand at 37 ° C. overnight. Dilute the target protein with RPMI to the target concentration, dispense 50 ⁇ L of antibody protein to the plate prepared the previous day, dilute T-LAK cells with RPMI to the target E / T ratio, and dispense 50 ⁇ L each (E / T ratio: effector (T-LAK cell) / target (target cancer cell) ratio) and cultured at 37 ° C. for 48 hours.
- RPMI % FBS
- the LH diabody-type bispecific antibody of the present invention is superior to humanized Ex3 by about one digit against any cell line. It was confirmed that the cytotoxic activity was equivalent to that of Ex3-scDb-Fc, an IgG-like highly functional bispecific antibody. Furthermore, the inhibitory effect on the proliferation of TFK-1 was compared between LH type Ex3 and LH type Ex3 scDb-Fc by the same method.
- LH type Ex3 scDb-Fc has a more remarkable cytotoxic activity than LH type Ex3 (FIG. 7).
- MTS reagent CellTiter 96 AQueous Non-Radioactive Cell Proliferation Assay, Promega
- PMS CellTiter 96 AQueous Non-Radioactive Cell Proliferation Assay, Promega
- the diabody type bispecific antibody can be further clinically applied. It is expected that development and seed search in pharmaceutical companies will be accelerated.
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Abstract
Description
[態様1]N末端からC末端の順に抗ヒト上皮細胞成長因子受容体1抗体528のL鎖のヒト型化可変領域(5L)及び抗CD3抗体OKT3のH鎖のヒト型化可変領域(OH)を含んで成る第一のポリペプチドと、N末端からC末端の順に抗CD3抗体OKT3のL鎖のヒト型化可変領域(OL)及び抗ヒト上皮細胞成長因子受容体1抗体528のH鎖のヒト型化可変領域(5H)を含んで成る第二のポリペプチドから構成されることを特徴とする、ダイアボディ型二重特異性抗体。
[態様2]抗ヒト上皮細胞成長因子受容体1抗体528のH鎖のヒト型化可変領域(5H)及びL鎖のヒト型化可変領域(5L)、並びに、抗CD3抗体OKT3のH鎖のヒト型化可変領域(OH)及びL鎖のヒト型化可変領域(OL)を含み、以下のいずれかの構造:
(i)(5LOH)-(ペプチドリンカー)-(OL5H)又は(OL5H)-(ペプチドリンカー)-(5LOH);
(ii)(5LOH)及び(OL5H)の2種類の一本鎖ポリペプチドから構成されるヒト型化ダイアボディ型二重特異性抗体がいずれか一方の一本鎖ポリペプチドによりヒンジ領域を介してヒト抗体の2つのFc領域に結合して成る抗体;
(iii)(5LOH)-(ペプチドリンカー)-(OL5H)又は(OL5H)-(ペプチドリンカー)-(5LOH)から成る一本鎖ポリペプチドがヒンジ領域を介してヒト抗体の2つのFc領域に結合して成る抗体;
を有するヒト型化高機能性二重特異性抗体。
[態様3](ii)の構造を有する態様2記載のヒト型化高機能性二重特異性抗体であって、該ヒト型化ダイアボディ型二重特異性抗体がプロテアーゼ切断部位を介してヒンジ領域に結合していることを特徴とする、前記ヒト型化高機能性二重特異性抗体。
[態様4](iii)の構造を有する態様2記載のヒト型化高機能性二重特異性抗体であって、一本鎖ポリペプチドがプロテアーゼ切断部位を介してヒンジ領域に結合していることを特徴とする、前記ヒト型化高機能性二重特異性抗体。
[態様5]各一本鎖ポリペプチドにおけるL鎖のヒト型化可変領域とH鎖のヒト型化可変領域がペプチドリンカーで連結されている、態様1又は2記載のダイアボディ型二重特異性抗体。
[態様6]
抗ヒト上皮細胞成長因子受容体1抗体528のL鎖のヒト型化可変領域(5L)、抗ヒト上皮細胞成長因子受容体1抗体528のH鎖のヒト型化可変領域(5H)、抗CD3抗体OKT3のL鎖のヒト型化可変領域(OL)、及び、抗CD3抗体OKT3のH鎖のヒト型化可変領域(OH)が、夫々、配列番号2,4,6及び8で示されるアミノ酸配列から成る、態様1~5のいずれか一項に記載の二重特異性抗体。
[態様7]態様1ないし6のいずれか一項に記載の二重特異性抗体を構成する一本鎖ポリペプチド。
[態様8]態様7に記載の一本鎖ポリペプチドをコードする核酸分子。
[態様9]態様1ないし6のいずれか一項に記載の二重特異性抗体を構成する2種類の一本鎖ポリペプチドを共にコードする核酸分子。
[態様10]態様8又は69記載の核酸分子を含有する複製可能なクローニングベクター又は発現ベクター。
[態様11]共発現ベクターである、態様10記載のベクター。
[態様12]プラスミドベクターである、態様10又は11記載のベクター。
[態様13]態様10ないし12のいずれか一項に記載のベクターで形質転換された宿主細胞。
[態様14]原核細胞である態様13記載の宿主細胞。
[態様15]大腸菌である態様14記載の宿主細胞。
[態様16]態様1ないし6のいずれか一項に記載の二重特異性抗体の製造方法であって、態様1315のいずれか一項に記載の宿主細胞を培養し該二重特異性抗体を構成する2種類の一本鎖ポリペプチドを発現させ、該ポリペプチドを回収・精製し、該2種類の一本鎖ポリペプチドを会合させ、形成された二重特異性抗体を分離・回収することから成る、前記方法。
[態様17]原核細胞が大腸菌であり、2種類の一本鎖ポリペプチドを大腸菌の培養培地上清、ペリズマ画分、菌体内可溶性画分、又は、菌体内不溶性画分から回収する、態様16記載の製造方法。
[態様18]態様1ないし6のいずれか一項に記載の二重特異性抗体の製造方法であって、態様11記載の共発現ベクターで形質転換された宿主細胞を培養し該二重特異性抗体を構成する2種類の一本鎖ポリペプチドを発現させ、該形質転換菌内でダイアボディ型二重特異性抗体を形成せしめ、形成された二重特異性抗体を分離・回収することから成る、前記方法。
[態様19]態様3又は4に記載のヒト型化高機能性二重特異性抗体をプロテアーゼで消化することによりFc領域及びヒンジ領域を切断することから成る、夫々、5LOH及びOL5Hの二種類のポリペプチドから構成されるヒト型化ダイアボディ型二重特異性抗体、又は態様2記載の(i)の構造を有するヒト型化高機能性二重特異性抗体の製造方法。
[態様20] 態様1ないし6のいずれか一項に記載の二重特異性抗体を有効成分として含有することを特徴とする医薬組成物。
[態様21]腫瘍細胞を排除する、殺傷する、傷害する及び/又は減少せしめるためのものであることを特徴とする態様20記載の医薬組成物。
[書類名] 要約書
[課題]二重特異性抗体の更なる高機能化によって、投与量の軽減による低コスト化など、医薬品としての付加価値を高める新たなダイアボディ型二重特異性抗体及びその製造方法を提供すること。
[解決手段]各ポリペプチドにおいてL鎖がN末側にあること(LH型)を特徴とするヒト型化ダイアボディ型二重特異性抗体(LH型ダイアボディ型二重特異性抗体)及び該LH型ダイアボディ型二重特異性抗体を含むヒト型化高機能性二重特異性抗体、該二重特異性抗体を構成する2種類の一本鎖ポリペプチドを共にコードする核酸分子、該核酸分子を含む発現ベクターで形質転換された宿主細胞を培養することを含む、該抗体の製造方法。
尚、本発明LH型BsAbに含まれるペプチドリンカーは、例えば1~20個のアミノ酸からなるポリペプチドであってよく、好ましくは1~15個のアミノ酸からなるポリペプチド、さらに好ましくは2~10個のアミノ酸からなるポリペプチドが挙げられる。
本発明のLH型ダイアボディ型二重特異性抗体を以下の概要で調製した。
発現ベクターは既に開発されているEGFR及びCD3を標的としたヒト型化ダイアボディ型発現ベクター(特許文献1、及び特許文献2の参考例1~4)を基に以下の通り作製した。
E-Fプライマーを用いPCR法によりヒト型化OL(以下hOL)を、G-Hプライマーを用いヒト型化5H(以下h5H)をそれぞれ増幅後、得られたPCR産物を混合し、さらにE-Hプライマーを用いてPCR増幅を行った。得られたPCR産物を制限酵素NcoIとSacIIで消化し、pRAベクターに挿入することで、SGGGGをリンカー配列として有するLH型ダイアボディを構成するヘテロscFvの1つhOLh5Hを発現させるためのベクターpRA-hOLh5Hを作製した。
さらに、I-Jライマーを用いPCR法によりh5LhOHを増幅後、得られたPCR産物を制限酵素SpeIとBamHIで消化し、pRA-hOLh5H中のhOLh5Hの後方に挿入することで、本発明のLH型ヒト型化ダイアボディ型二重特異性抗体の製造用の共発現ベクターを構築した(図1)。
それぞれ、C末端側には検出のためのc-mycペプチドタグ、並びに精製のためのHis-tagが並列に導入されている。
B 5LSG4: 5'-CTGGCCACCGCCACCAGATTTAATTTCCACTTTGGTGCCACCGCC-3'〔配列番号:10〕
C SG4OH: 5'-AAATCTGGTGGCGGTGGCCAGGTGCAACTGGTGCAGAGCGGC-3'〔配列番号:11〕
D OH-SacII:5'-NNNNAGCCGCGGAGCTAACGGTCACCGGGGTGCCCTGGCC-3'〔配列番号:12〕
E NcoI-OL:5'-NNNNCCATGGCCGATATTCAGATGACCCAGAGCCCG-3'〔配列番号:13〕
F OLSG4:5'-CTGGCCACCGCCACCAGAGGTAATCTGCAGTTTGGTACCCTG-3'〔配列番号:14〕
G SG45H: 5'-ACCTCTGGTGGCGGTGGCCAGGTGCAACTGGTTCAGAGCGGC-3'〔配列番号:15〕
H 5H-Sac II: 5'-NNNNAGCCGCGGAGCTCACGGTAACCAGCGTACC-3'〔配列番号:16〕
I SpeI-pel-B:5'-ACTAGTTATTTCAAGGAGACAGTCATAATG-3'〔配列番号:17〕
J His-BamHI: 5'-CACCATCATCACCACCATTAATAGCGGATTC-3'〔配列番号:18〕
特許文献2の実施例1に記載の方法(第一~三の型)に準じて上記各配列及び適当なPCRプライマーを用いてLH型高機能性二重特異性抗体(Ex3 scDb-Fc)用の発現ベクターを作製し、次いで、特許文献2の実施例2に準じてCHO細胞を宿主として用いてEx3 scDb-Fcを調製した。但し、まず、第一の型であるLH型高機能性二重特異性抗体(LH型Ex3 scDb)として、(5LOH)の上流にペプチドリンカーを介して(OL5H)を挿入することによって、(N末側)(OL5H)-(ペプチドリンカー)-(5LOH)(C末側)の構成を有するEx3 scDbを作製し、これに基づきEx3 scDb-Fcを作製した。その結果、精製後の抗体収量は培養液1Lあたり約1mgであった。
実施例1で作製した本発明のLH型ダイアボディ型二重特異性抗体及び実施例2で作製したLH型高機能性二重特異性抗体について、以下の概要で細胞増殖阻害試験(MTS アッセイ)を実施した。
更に、同様の方法でTFK-1の増殖に対する阻害作用をLH型Ex3とLH型Ex3 scDb-Fcとで比較した。その結果、LH型Ex3 scDb-FcはLH型Ex3よりも更に顕著な細胞傷害活性を有することが示された(図7)。
(注) MTS 試薬 (CellTiter 96 AQueous Non-Radioactive Cell Proliferation Assay, Promega社製) 、PMS(CellTiter 96 AQueous Non-Radioactive Cell Proliferation Assay,Promega 社製)
Claims (21)
- N末端からC末端の順に抗ヒト上皮細胞成長因子受容体1抗体528のL鎖のヒト型化可変領域(5L)及び抗CD3抗体OKT3のH鎖のヒト型化可変領域(OH)を含んで成る第一のポリペプチドと、N末端からC末端の順に抗CD3抗体OKT3のL鎖のヒト型化可変領域(OL)及び抗ヒト上皮細胞成長因子受容体1抗体528のH鎖のヒト型化可変領域(5H)を含んで成る第二のポリペプチドから構成されることを特徴とする、ダイアボディ型二重特異性抗体。
- 抗ヒト上皮細胞成長因子受容体1抗体528のH鎖のヒト型化可変領域(5H)及びL鎖のヒト型化可変領域(5L)、並びに、抗CD3抗体OKT3のH鎖のヒト型化可変領域(OH)及びL鎖のヒト型化可変領域(OL)を含み、以下のいずれかの構造:
(i)(5LOH)-(ペプチドリンカー)-(OL5H)又は(OL5H)-(ペプチドリンカー)-(5LOH);
(ii)(5LOH)及び(OL5H)の2種類の一本鎖ポリペプチドから構成されるヒト型化ダイアボディ型二重特異性抗体がいずれか一方の一本鎖ポリペプチドによりヒンジ領域を介してヒト抗体の2つのFc領域に結合して成る抗体;
(iii)(5LOH)-(ペプチドリンカー)-(OL5H)又は(OL5H)-(ペプチドリンカー)-(5LOH)から成る一本鎖ポリペプチドがヒンジ領域を介してヒト抗体の2つのFc領域に結合して成る抗体;
を有するヒト型化高機能性二重特異性抗体。 - (ii)の構造を有する請求項2記載のヒト型化高機能性二重特異性抗体であって、該ヒト型化ダイアボディ型二重特異性抗体がプロテアーゼ切断部位を介してヒンジ領域に結合していることを特徴とする、前記ヒト型化高機能性二重特異性抗体。
- (iii)の構造を有する請求項2記載のヒト型化高機能性二重特異性抗体であって、一本鎖ポリペプチドがプロテアーゼ切断部位を介してヒンジ領域に結合していることを特徴とする、前記ヒト型化高機能性二重特異性抗体。
- 各一本鎖ポリペプチドにおけるL鎖のヒト型化可変領域とH鎖のヒト型化可変領域がペプチドリンカーで連結されている、請求項1又は2記載のダイアボディ型二重特異性抗体。
- 抗ヒト上皮細胞成長因子受容体1抗体528のL鎖のヒト型化可変領域(5L)、抗ヒト上皮細胞成長因子受容体1抗体528のH鎖のヒト型化可変領域(5H)、抗CD3抗体OKT3のL鎖のヒト型化可変領域(OL)、及び、抗CD3抗体OKT3のH鎖のヒト型化可変領域(OH)が、夫々、配列番号2,4,6及び8で示されるアミノ酸配列から成る、請求項1~5のいずれか一項に記載の二重特異性抗体。
- 請求項1ないし6のいずれか一項に記載の二重特異性抗体を構成する一本鎖ポリペプチド。
- 請求項7に記載の一本鎖ポリペプチドをコードする核酸分子。
- 請求項1ないし6のいずれか一項に記載の二重特異性抗体を構成する2種類の一本鎖ポリペプチドを共にコードする核酸分子。
- 請求項8又は69記載の核酸分子を含有する複製可能なクローニングベクター又は発現ベクター。
- 共発現ベクターである、請求項10記載のベクター。
- プラスミドベクターである、請求項10又は11記載のベクター。
- 請求項10ないし12のいずれか一項に記載のベクターで形質転換された宿主細胞。
- 原核細胞である請求項13記載の宿主細胞。
- 大腸菌である請求項14記載の宿主細胞。
- 請求項1ないし6のいずれか一項に記載の二重特異性抗体の製造方法であって、請求項1315のいずれか一項に記載の宿主細胞を培養し該二重特異性抗体を構成する2種類の一本鎖ポリペプチドを発現させ、該ポリペプチドを回収・精製し、該2種類の一本鎖ポリペプチドを会合させ、形成された二重特異性抗体を分離・回収することから成る、前記方法。
- 原核細胞が大腸菌であり、2種類の一本鎖ポリペプチドを大腸菌の培養培地上清、ペリズマ画分、菌体内可溶性画分、又は、菌体内不溶性画分から回収する、請求項16記載の製造方法。
- 請求項1ないし6のいずれか一項に記載の二重特異性抗体の製造方法であって、請求項11記載の共発現ベクターで形質転換された宿主細胞を培養し該二重特異性抗体を構成する2種類の一本鎖ポリペプチドを発現させ、該形質転換菌内でダイアボディ型二重特異性抗体を形成せしめ、形成された二重特異性抗体を分離・回収することから成る、前記方法。
- 請求項3又は4に記載のヒト型化高機能性二重特異性抗体をプロテアーゼで消化することによりFc領域及びヒンジ領域を切断することから成る、夫々、5LOH及びOL5Hの二種類のポリペプチドから構成されるヒト型化ダイアボディ型二重特異性抗体、又は請求項2記載の(i)の構造を有するヒト型化高機能性二重特異性抗体の製造方法。
- 請求項1ないし6のいずれか一項に記載の二重特異性抗体を有効成分として含有することを特徴とする医薬組成物。
- 腫瘍細胞を排除する、殺傷する、傷害する及び/又は減少せしめるためのものであることを特徴とする請求項20記載の医薬組成物。
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|---|---|---|---|
| US13/257,614 US9315584B2 (en) | 2009-03-25 | 2010-01-04 | LH-type bispecific antibody |
| EP10755725.8A EP2412808B1 (en) | 2009-03-25 | 2010-01-04 | Lh-type bispecific antibody |
| JP2011505904A JP5725508B2 (ja) | 2009-03-25 | 2010-01-04 | Lh型二重特異性抗体 |
| US14/597,969 US20150175713A1 (en) | 2009-03-25 | 2015-01-15 | Lh-type bispecific antibody |
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| JP2009-075050 | 2009-03-25 | ||
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| US13/257,614 A-371-Of-International US9315584B2 (en) | 2009-03-25 | 2010-01-04 | LH-type bispecific antibody |
| US14/597,969 Division US20150175713A1 (en) | 2009-03-25 | 2015-01-15 | Lh-type bispecific antibody |
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| US (2) | US9315584B2 (ja) |
| EP (1) | EP2412808B1 (ja) |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011062112A1 (ja) * | 2009-11-18 | 2011-05-26 | 国立大学法人東北大学 | ヒト型化抗egfr抗体可変領域の高機能性変異体 |
| JP2014527515A (ja) * | 2011-07-22 | 2014-10-16 | アフィメート テラポイティクス アーゲー | 多価抗原結合Fv分子 |
| JP2015156836A (ja) * | 2014-02-25 | 2015-09-03 | 国立大学法人東北大学 | 剛直なヘリックス構造を有するオリゴペプチドが導入された二重特異性抗体 |
| WO2015146437A1 (ja) * | 2014-03-25 | 2015-10-01 | 国立大学法人東北大学 | 高機能性IgG2型二重特異性抗体 |
| WO2015146438A1 (ja) * | 2014-03-26 | 2015-10-01 | 国立大学法人東北大学 | ヒト上皮増殖因子受容体を標的とした二重特異性抗体 |
| US10669337B2 (en) | 2014-07-25 | 2020-06-02 | Cytomx Therapeutics, Inc. | Bispecific anti-CD3 antibodies, bispecific activatable anti-CD3 antibodies, and methods of using the same |
| WO2021038975A1 (ja) | 2019-08-28 | 2021-03-04 | 株式会社アネロファーマ・サイエンス | ダイアボディ型BsAbを発現・分泌するビフィドバクテリウム属細菌 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JOP20210044A1 (ar) | 2010-12-30 | 2017-06-16 | Takeda Pharmaceuticals Co | الأجسام المضادة لـ cd38 |
| PL3653221T3 (pl) | 2015-02-19 | 2022-12-19 | Compugen Ltd. | Przeciwciała anty-pvrig i sposoby ich zastosowania |
| ES2896055T3 (es) | 2015-07-13 | 2022-02-23 | Compugen Ltd | Composiciones de HIDE1 y métodos |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992022653A1 (en) | 1991-06-14 | 1992-12-23 | Genentech, Inc. | Method for making humanized antibodies |
| EP0239400B1 (en) | 1986-03-27 | 1994-08-03 | Medical Research Council | Recombinant antibodies and methods for their production |
| EP0451216B1 (en) | 1988-12-28 | 1996-01-24 | Protein Design Labs, Inc. | Humanized immunoglobulins and their production and use |
| JP2004242638A (ja) * | 2003-02-17 | 2004-09-02 | Tohoku Techno Arch Co Ltd | 新規なダイアボディ型二重特異性抗体 |
| WO2007108152A1 (ja) | 2006-03-23 | 2007-09-27 | Tohoku University | 高機能性二重特異性抗体 |
-
2010
- 2010-01-04 WO PCT/JP2010/050008 patent/WO2010109924A1/ja not_active Ceased
- 2010-01-04 US US13/257,614 patent/US9315584B2/en not_active Expired - Fee Related
- 2010-01-04 EP EP10755725.8A patent/EP2412808B1/en not_active Not-in-force
- 2010-01-04 JP JP2011505904A patent/JP5725508B2/ja active Active
-
2015
- 2015-01-15 US US14/597,969 patent/US20150175713A1/en not_active Abandoned
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0239400B1 (en) | 1986-03-27 | 1994-08-03 | Medical Research Council | Recombinant antibodies and methods for their production |
| EP0451216B1 (en) | 1988-12-28 | 1996-01-24 | Protein Design Labs, Inc. | Humanized immunoglobulins and their production and use |
| WO1992022653A1 (en) | 1991-06-14 | 1992-12-23 | Genentech, Inc. | Method for making humanized antibodies |
| JP2004242638A (ja) * | 2003-02-17 | 2004-09-02 | Tohoku Techno Arch Co Ltd | 新規なダイアボディ型二重特異性抗体 |
| JP3803790B2 (ja) | 2003-02-17 | 2006-08-02 | 株式会社東北テクノアーチ | 新規なダイアボディ型二重特異性抗体 |
| WO2007108152A1 (ja) | 2006-03-23 | 2007-09-27 | Tohoku University | 高機能性二重特異性抗体 |
Non-Patent Citations (40)
| Title |
|---|
| "Biocomputing: Informatics and Genome Projects", 1993, ACADEMIC PRESS |
| "Computational Molecular Biology", 1988, OXFORD UNIVERSITY PRESS |
| "Computer Analysis of Sequence Data: Part I", 1994, HUMAN PRESS |
| "Guide Book of Japanese Pharmacopoeia", 10 July 1996, HIROKAWA PUBLISHING COMPANY |
| "Guide to Huge Computers", 1994, ACADEMIC PRESS |
| "Molecular cloning", 2001, COLD SPRING HARBOR LAB. PRESS |
| "Molecular Cloning: A Laboratory Manual", 1989, COLD SPRING HARBOR LABORATORY PRESS |
| "Mutagenesis: a Practical Approach", 1991, IRL PRESS |
| "PCR Protocols", 1990, ACADEMIC PRESS |
| "PCR Protocols: a guide to methods and applications", 1990, ACADEMIC PRESS |
| "PCR Technology", 1989, STOCKTON PRESS |
| "PCR: a practical approach", 1991, IRL PRESS |
| "Sequence Analysis Primer", 1991, M-STOCKTON PRESS |
| "The Pharmacology of Monoclonal Antibodies", vol. 113, 1994, SPRINGER-VERLAG, pages: 269 - 315 |
| "The Practical Approach Series", vol. 1, 1995, OXFORD UNIVERSITY PRESS, article "DNA Cloning" |
| "The Practical Approach Series", vol. 1-4, 1995, OXFORD UNIVERSITY PRESS, article "DNA Cloning" |
| "The Practical Approach Series", vol. 4, 1995, IRL PRESS, OXFORD UNIVERSITY PRESS |
| ADAIR, J. R. ET AL.: "Humanization of the murine anti-human CD3 monoclonal antibody OKT3", HUM ANTIBODIES HYBRIDOMAS, vol. 5, 1994, pages 41 - 7 |
| ALT M: "Novel tetravalent and bispecific IgG-like antibody molecules combining single-chain diabodies with the immunoglobulin gammal Fc or CH3 region", FEBS LETT., vol. 454, 1999, pages 90 - 4 |
| ATSCHUL, S. F. ET AL., J. MOLEC. BIOL., vol. 215, 1990, pages 403 |
| BIOCHEM SOC TRANS, vol. 30, no. 4, 2002, pages 507 - 11 |
| CARILLO, H., LIPMAN, D., SIAM J. APPLIED MATH., vol. 48, 1988, pages 1073 |
| DEVEREUX, J. ET AL., NUCLEIC ACIDS RESEARCH, 1984, pages 387 |
| HOLLINGER ET AL., PROC. NATL. ACAD. SCI. USA, vol. 90, 1993, pages 6444 - 6448 |
| J MOL BIOL, vol. 330, no. 1, 2003, pages 99 - 111 |
| J. SAMBROOK, E. F. FRITSCH, T. MANIATIS: "Molecular Cloning", 1989, COLD SPRING HARBOR LABORATORY |
| JONES ET AL., NATURE, vol. 321, 1986, pages 522 - 525 |
| KREBBER, A. ET AL.: "Reliable cloning of functional antibody variable domains from hybridomas and spleen cell repertoires employing a reengineered phage display system", J IMMUNOL METHODS, vol. 201, 1997, pages 35 - 55 |
| LU D. ET AL.: "The effect of variable domain orientation and arrangement on the antigen- binding activity of a recombinant human bispecific diabody", BIOCHEM. BIOPHYS. RES. COMMUN., vol. 318, no. 2, 28 May 2004 (2004-05-28), pages 507 - 513, XP004505410 * |
| LU D: "A fully human recombinant IgG-like bispecific antibody to both the epidermal growth factor receptor and the insulin-like growth factor receptor for enhanced antitumor activity", J BIOL CHEM., vol. 280, 2005, pages 19665 - 72 |
| M.A. FROHMAN, PROC. NATL. ACAD. SCI. USA, vol. 85, 1988, pages 8998 - 9002 |
| PRESTA, CURR. OP. STRUCT. BIOL, vol. 2, 1992, pages 593 - 596 |
| R. SAIKI ET AL., SCIENCE, vol. 230, 1985, pages 1350 |
| R. SAIKI ET AL., SCIENCE, vol. 239, 1988, pages 487 |
| REICHMANN ET AL., NATURE, vol. 332, 1988, pages 323 - 329 |
| SANGER ET AL., PROC. NATL. ACAD. SCI. USA, vol. 74, 1977, pages 5463 - 5467 |
| SCIENCE, vol. 321, no. 5891, 15 August 2008 (2008-08-15), pages 974 - 7 |
| See also references of EP2412808A4 * |
| TODOROVSKA A. ET AL.: "Design and application of diabodies, triabodies and tetrabodies for cancer targeting", J. IMMUNOL. METHODS, vol. 248, no. 1-2, 1 February 2001 (2001-02-01), pages 47 - 66, XP002288731 * |
| VON HEINJE, G: "Sequence Analysis in Molecular Biology", 1987, ACADEMIC PRESS |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011062112A1 (ja) * | 2009-11-18 | 2011-05-26 | 国立大学法人東北大学 | ヒト型化抗egfr抗体可変領域の高機能性変異体 |
| US8921525B2 (en) | 2009-11-18 | 2014-12-30 | Tohoku University | Highly-functional mutant of humanized anti-EGFR antibody variable region |
| JP2014527515A (ja) * | 2011-07-22 | 2014-10-16 | アフィメート テラポイティクス アーゲー | 多価抗原結合Fv分子 |
| US11161906B2 (en) | 2013-07-25 | 2021-11-02 | Cytomx Therapeutics, Inc. | Multispecific antibodies, multispecific activatable antibodies and methods of using the same |
| JP2015156836A (ja) * | 2014-02-25 | 2015-09-03 | 国立大学法人東北大学 | 剛直なヘリックス構造を有するオリゴペプチドが導入された二重特異性抗体 |
| WO2015146437A1 (ja) * | 2014-03-25 | 2015-10-01 | 国立大学法人東北大学 | 高機能性IgG2型二重特異性抗体 |
| WO2015146438A1 (ja) * | 2014-03-26 | 2015-10-01 | 国立大学法人東北大学 | ヒト上皮増殖因子受容体を標的とした二重特異性抗体 |
| US10669337B2 (en) | 2014-07-25 | 2020-06-02 | Cytomx Therapeutics, Inc. | Bispecific anti-CD3 antibodies, bispecific activatable anti-CD3 antibodies, and methods of using the same |
| US11802158B2 (en) | 2014-07-25 | 2023-10-31 | Cytomx Therapeutics, Inc. | Bispecific anti-CD3 antibodies, bispecific activatable anti-CD3 antibodies, and methods of using the same |
| WO2021038975A1 (ja) | 2019-08-28 | 2021-03-04 | 株式会社アネロファーマ・サイエンス | ダイアボディ型BsAbを発現・分泌するビフィドバクテリウム属細菌 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2412808A4 (en) | 2013-01-23 |
| EP2412808B1 (en) | 2016-09-07 |
| JP5725508B2 (ja) | 2015-05-27 |
| EP2412808A1 (en) | 2012-02-01 |
| US20150175713A1 (en) | 2015-06-25 |
| US9315584B2 (en) | 2016-04-19 |
| US20120095191A1 (en) | 2012-04-19 |
| JPWO2010109924A1 (ja) | 2012-09-27 |
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