WO1998010070A1 - IMMUNOGLOBULINE HUMANISEE REAGISSANT SPECIFIQUEMENT AVEC UN LIGAND Fas OU L'UN DE SES FRAGMENTS ACTIFS ET REGION D'INDUCTION D'APOPTOSE PRENANT NAISSANCE DANS UN LIGAND Fas - Google Patents
IMMUNOGLOBULINE HUMANISEE REAGISSANT SPECIFIQUEMENT AVEC UN LIGAND Fas OU L'UN DE SES FRAGMENTS ACTIFS ET REGION D'INDUCTION D'APOPTOSE PRENANT NAISSANCE DANS UN LIGAND Fas Download PDFInfo
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- WO1998010070A1 WO1998010070A1 PCT/JP1997/002983 JP9702983W WO9810070A1 WO 1998010070 A1 WO1998010070 A1 WO 1998010070A1 JP 9702983 W JP9702983 W JP 9702983W WO 9810070 A1 WO9810070 A1 WO 9810070A1
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- WIPO (PCT)
- Prior art keywords
- fas ligand
- immunoglobulin
- fas
- amino acid
- antibody
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Classifications
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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
- C07K16/2875—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 NGF/TNF superfamily, e.g. CD70, CD95L, CD153, CD154
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- C07K14/705—Receptors; Cell surface antigens; Cell surface determinants
- C07K14/70575—NGF/TNF-superfamily, e.g. CD70, CD95L, CD153, CD154
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2317/00—Immunoglobulins specific features
- C07K2317/20—Immunoglobulins specific features characterized by taxonomic origin
- C07K2317/24—Immunoglobulins specific features characterized by taxonomic origin containing regions, domains or residues from different species, e.g. chimeric, humanized or veneered
-
- 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
- C07K2317/34—Identification of a linear epitope shorter than 20 amino acid residues or of a conformational epitope defined by amino acid residues
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2319/00—Fusion polypeptide
Definitions
- Humanized immunoglobulin or its active fragment that specifically reacts with the Fs ligand and apoptosis-inducing region derived from the Fs ligand
- the present invention relates to a novel humanized immunoglobulin and, in addition, to a region on a Fas ligand which is important for suppressing apoptosis induced by a Fas-Fas ligand interaction in a Fas-expressing cell.
- F the as relates humanized immune globulin or active fragment specifically reactive with ligand, the immunoglobulin and regions, F the as antigen and F the as apoptosis force s induced by physiological responses ligand It is useful in clinical applications for causative diseases, for example, elucidation of the Fas system in cell death, immunotherapy and diagnosis, detection of Fas ligand, or related industrial fields.
- Multicellular organisms carefully control cell growth and death to maintain their homeostasis. During the ontogeny process, many cell forces are removed by cell death. Also, in adults, the cells that make up an organ maintain their functions while always maintaining a balance between proliferation and death. Such cell death is a predetermined death and is called “programmed cell death”, which is distinguished from accidental cell death caused by physical and chemical factors. (Raff, M.C, Nature, vol.356, p.397—400,1992) o The processes of these two cell deaths are different. In other words, it is thought that program cell death is caused by the process of apoptosis, whereas accidental cell death kills cells through the process of necrosis (necrosis) (Kerr (Kerr, JF), Brit. JC ancer.vol. 26, p. 239-257, 1 972) o
- the Fas antigen is a cell surface protein that mediates programmed cell death (apoptosis), and its cDNA has also been cloned (Nagata et al., Cell, vol. 66, p. 223-243, 1999). ). From the structure of the obtained cDNA, it was found that the human F a ss antigen is a transmembrane protein consisting of 319 amino acid residues and has one transmembrane portion. The extracellular portion of the F ss antigen is composed of 157 amino acid residues and has a structure rich in cysteine residues. The mouse Fas antigen is composed of 306 amino acids and shows 49.3% homology with the human Fas antigen.
- Fas antigen is a cell surface protein belonging to the NGFZTNF receptor family. Much of this protein belonging to the family of all, the force since it has the re-ligand in vivo to F as antigen had been expected this and force the ligand is present in the living body?, 1 993 years, A rat Fas ligand molecule was identified by Dr. Shigeichi Nagata's group (Nagata et al., Cell, vol. 75, p.
- the Fas ligand is a protein consisting of 278 amino acids and having a molecular weight of 31 and 138, and is a glycoprotein with four sites of N-glycoside linkage sites.
- soluble Fas ligand molecules have been shown to induce apoptosis in target cells that express the Fas antigen on the cell surface (Nagata et al., J. Exp. Med., Vol. 179). , p. 873—879, 1 994).
- the Fas antigen transmits a signal of “death” to the cell, but inactivation of apoptosis-mediated proteins such as the Fas antigen and the Fas ligand causes abnormalities in the cell. It has been suggested that it causes proliferation, while its abnormal activation activates certain inflammatory reactions.
- mice with a 1 pr (lymphoproliferation) mutation that exhibits autoimmune disease-like symptoms have been found to have mutations in the Fas gene, but also exhibit autoimmune disease-like symptoms. It has been reported that mice with g 1 d (generalized lymphoproliferative disease) mutations have mutations in the Fas ligand itself (Nagata et al., Cell, vol. 76, p. 969-979, 1994).
- Fas antigen and Fas ligand may cause various diseases.
- the tat protein derived from HIV the AIDS-causing virus, promotes the expression of Fas ligand and causes apoptosis in T cells expressing the Fas antigen through the interaction of Fas-Fas ligand.
- Fas-Fas ligand the Fas antigen
- expression of Fas was observed in HIV-infected T cells. (Kobayashi et al., Proc.
- Fas expression was observed in viral hepatitis (Hiramatsu et al., Hepatology, vol. 19, p. 1 354- 1359, 1994), it has been reported that expression of Fas is observed in systemic lupus erythematosus (SLE) and rheumatoid arthritis (RA) in diabetes and autoimmune diseases. It can be inferred that it is caused by the Fas ligand that reacts with the as antigen.
- SLE systemic lupus erythematosus
- RA rheumatoid arthritis
- the present inventors have invented and filed a patent application for a mouse monoclonal antibody capable of specifically reacting with a Fas ligand and suppressing (inhibiting) the physiological reaction between Fas and a Fas ligand (Patent Application 1995). No. 303492).
- the monoclonal antibody can bind to the Fas ligand more strongly than the binding between the Fas and the Fas ligand, it inhibits the physiological reaction of the Fas-Fas ligand even in vivo. was thought to be possible.
- a monoclonal antibody having such high activity is desirable from the viewpoint of clinical application.
- a non-human immunoglobulin such as the mouse monoclonal antibody described above, when administered to humans, has the following disadvantages. It has the disadvantages described. In other words, non-human immunoglobulin has a relatively short half-life in the human body, and is administered more frequently than human antibody to maintain a constant blood concentration. Is required. It should be further noted that non-human immunoglobulin contains an amino acid sequence capable of exhibiting antigenicity when administered to humans. Therefore, in the case of frequent administrations, the immune response induced by the administration not only eliminates immunoglobulins to be administered later, but may also cause anaphylactic shock as an extreme result. is there.
- a complementarity-determining region (hereinafter referred to as CDR) in the variable region (V region) that directly binds to the antigen )
- CDR complementarity-determining region
- mouse Fas ligands are TNF ⁇ and TNF /? (Referred to as TNF) to form a trimer structure and exert biological activity in the same manner as above, and a mouse Fas ligand trimer model was created, and the TNF trimer structure and TNF and TNF receptor With reference to the interaction region, the interaction region between the monomers of the mouse Fas ligand and the interaction region between the mouse Fas ligand and the Fas antigen are inferred. However, no proof has been made of this inference.
- Fas In order to suppress (or inhibit) apoptosis caused by the physiological response of the Fas ligand, any region of the Fas ligand or Fas must be targeted. It remains unclear what to do.
- the main reason why the activity of humanized immunoglobulin is lower than that of the original mouse immunoglobulin is that the three-dimensional structure of the framework region of the mouse immunoglobulin, which serves as the CDR, and the human immunoglobulin, which serves as the acceptor, is reduced. It is considered that the difference in structure causes a structural change in the transplanted CDR, resulting in a decrease in antigen binding. In order to avoid such a decrease in activity, an improved method of humanization by CDR transplantation is required.
- the monoclonal antibody specifically reacting with the Fas ligand contained in the invention of the 1995 Patent Application No. 3303492 suppresses (or inhibits) the physiological reaction between the Fas and the Fas ligand. Antibodies with useful activity. However, since the antibody is a mouse immunoglobulin, clinical application to humans is practically impossible from the viewpoints of safety (induction of antigenicity) and efficacy (reduction of half-life). . Disclosure of the invention
- a primary object of the present invention is to provide a humanized immunoglobulin or an active fragment thereof which specifically reacts with a Fas ligand. It is intended to provide a humanized immunoglobulin capable of suppressing (or inhibiting) a physiological reaction with the immunoglobulin.
- the interaction region between human Fas and Fas ligand has not been clarified, and modeling of the Fas-Fas ligand complex—the crystal structure analysis etc. has not been performed.
- the region for effectively suppressing (or inhibiting) apoptosis caused by the physiological response of the Fas ligand has not been determined.
- Another object of the present invention is to investigate the reactivity of a plurality of anti-Fas ligand monoclonal antibodies having a high apoptosis-suppressing activity and a plurality of Fs ligand (mutated Fas ligand) molecules into which amino acid substitutions have been introduced.
- Fs ligand mutated Fas ligand
- FIG. 1 is a diagram showing the nucleic acid and amino acid sequences of the heavy chain variable region of the NOK2 antibody.
- the underlined region shows the primer used for cloning.
- FIG. 2 is a diagram showing the nucleic acid and amino acid sequences of the light chain variable region of the NOK2 antibody.
- the underlined region shows the primer used for cloning.
- FIG. 3 shows the heavy chain expression plasmid (a) and chimera of chimeric NOK2 antibody.
- FIG. 4 is a view showing a light chain protein (b) of the N ⁇ K2 antibody.
- FIG. 4 is a diagram showing the results of examining the recognition of a chimeric NO K2 antibody for a Fs ligand by ELISA.
- FIG. 5 shows the amino acid sequences of the heavy chain variable regions (RNOK2VHver11 and RNOK2VHver12) of the NOK2 antibody, SGI antibody, and humanized N0K2 (RNOK2) immunoglobulin.
- Figure 6 shows the NOK2 antibody, the REI antibody, and the light chain variable region of huVL19 and huVL31 of human-derived immunoglobulin and RNOK2 immunoglobulin.
- Figure 7 shows the NO K2 antibody, the RE I antibody, and the light chain variable regions of human immunoglobulins huVL19 and huVL31 and RNOK2 immunoglobulin.
- Figure 8 shows the RNOK 2 immunoglobulin heavy chain variable region (RNOK 2
- FIG. 4 is a view showing that primers used for preparing genes of VH Ver 11 and RNOK 2 VH ver 12) anneal to the heavy chain variable region of type II RC25 immunoglobulin.
- Figure 9 shows the heavy chain variable region of RN0K2 immunoglobulin (RNOK2
- FIG. 3 is a view showing that primers used for preparing genes of VH Ver 11 and RNOK2 VH ver 12) anneal to the heavy chain variable region of type II RC25 immunoglobulin.
- Figure 10 shows that the primers used to generate the gene for the light chain variable region of RNOK2 immunoglobulin (RNOK2 VLver 1) anneal to the type II NOK2 antibody light chain. It is.
- Figure 11 shows how the primers used to generate the gene for the light chain variable region of RNOK2 immunoglobulin (RNOK2 VL Ver 1) anneal to the type II NOK2 antibody light chain.
- FIG. 11 shows how the primers used to generate the gene for the light chain variable region of RNOK2 immunoglobulin (RNOK2 VL Ver 1) anneal to the type II NOK2 antibody light chain.
- FIG. 12 shows the primers used to generate the genes for the light chain variable regions of RNOK2 immunoglobulin (RNOK2 VL Ver21, RNOK2 VLver 22, RNOK2VL ver 23 and RNOK2 VL ver 24).
- FIG. 3 is a diagram showing that ⁇ is annealed to the type II NOK2 antibody light chain.
- Figure 13 shows the primers used to generate the genes for the light chain variable regions of RNOK2 immunoglobulin (RNOK2 VL Ver 21, RNOK 2 VL ver 22, RNOK2 VL ver 23 and RNOK2 VL ver 24).
- FIG. 2 is a diagram showing a manner in which a mer anneals to a gun-shaped NO K2 antibody light chain.
- FIG. 14 is a diagram showing the results of an ELISA test for the recognition of each RNOK2 immunoglobulin for a Fs ligand.
- FIG. 15 is a diagram showing the results of examining the inhibitory activity of each RNOK2 immunoglobulin and mouse NOK2 immunoglobulin on apoptosis that occurs through the Fs ligand and Fas.
- FIG. 16 is a diagram showing a part of the nucleic acid sequence (upper row) and the amino acid sequence (lower row) of the Fs ligand.
- the amino acid numbers are according to the literature of Nagata et al. (Nagata et al., Int. Immunology, vol. 6, p. 1567-574, 1999).
- FIG. 17 shows a part of the results of an ELISA test for the recognition of anti-FLAG antibodies for expressed native and mutant Fas ligands. It is.
- FIG. 18 is a diagram showing a part of the results obtained by examining the recognition of an anti-Fas ligand antibody (NOK1 antibody) for the expressed native Fs ligand and mutant Fs ligand by ELISA.
- NOK1 antibody anti-Fas ligand antibody
- FIG. 19 is a diagram showing the relative recognition ability of each NOK antibody and humanized N0K2 antibody for each mutant Fas ligand.
- N. D. means not implemented (Not Done).
- FIG. 20 is a diagram showing the relative recognition ability of each NOK antibody and humanized NOK2 antibody for each mutant Fas ligand. N.D. means not implemented (Not Done).
- FIG. 21 is a diagram showing the alignment between the amino acid sequence of the Fs ligand and the amino acid sequence of TNFa and TNF.
- the top row shows the amino acid sequence of the extracellular region of human Fas ligand, which is shown in the literature of Nagata et al. (Nagata et al., Int. Immunology, vol.6, p.1567-1574, 1994).
- the eye shows the amino acid sequence of the modeled region
- the third row shows the amino acid sequence of TNF ⁇ (1 TNF)
- the bottom row shows the amino acid sequence of TNF /? (1 TNR).
- FIG. 22 shows the amino acids recognized by the NOK1 antibody on two of the Fs ligand trimers by circles. Gray circles indicate amino acids present on the same side, and white circles indicate other amino acids.
- FIG. 23 shows the amino acids recognized by the NOK2 antibody and the humanized NOK2 antibody on two molecules of the Fas ligand trimer by circles. Gray circles indicate amino acids present on the same side, and white circles indicate other amino acids. The wavy circles indicate amino acids specifically recognized by the humanized NOK2 antibody.
- Figure 24 shows that the N0K3 antibody was detected on two of the Fas ligand trimers. Amino acids to be identified are indicated by circles. Gray circles indicate amino acids present on the same side, and white circles indicate other amino acids.
- FIG. 25 is a diagram showing the alignment of the VH region of the NOK2 antibody and the VH region of the 1F0R antibody.
- the constant region added downstream of the VH region is that of the 1 FOR antibody.
- FIG. 26 is a diagram showing the alignment of the VL region of the NOK2 antibody and the VL region of the 1TET antibody.
- the constant region added downstream of the VL region is that of the 1 TET antibody.
- FIG. 27 shows the amino acids recognized by each NOK antibody and humanized NOK2 antibody, indicated on two molecules of the Fs ligand trimer, by circles. Gray circles indicate amino acids present on the same side, and white circles indicate other amino acids.
- the circle surrounding the amino acid indicated by the gray circle is a circle with a radius of about 17 angstroms, which is almost the same size as the CDR region of the antibody.
- FIGS. 29 to 31 are diagrams showing Van der Waals contact models of two molecules of the Fs ligand trimer (shown in white and dark colors, respectively).
- the recognition amino acid of the N0K1 antibody is shown
- FIG. 30 the recognition amino acid of the NOK2 antibody and the humanized N0K2 antibody is shown
- FIG. 31 the recognition amino acid of the N0K3 antibody is shown. Each is indicated by diagonal lines.
- FIG. 32 and FIG. 33 are schematic views from the side of the recognition region of the NOK2 antibody in the Fas ligand trimer.
- the upper model is The lower model of the Gand trimer is the Fab portion of the NOK2 antibody, and the middle portion is the complementarity determining region (CDR) of the NOK2 antibody.
- the CDR of the NOK2 antibody in FIG. 33 has almost the same size as a circle with a radius of about 17 angstroms.
- Fig. 34 shows a van der Waals contact model similar to Figs. 29-31. The amino acids within the radius of approximately 17 Angstroms shown in Fig. 33 and having an exposed surface of at least 15 square Angstroms are shown. Is shown with diagonal lines.
- the above-mentioned FR amino acid selected using computer modeling based on such information and the receptor human anti-human antibody together with CDR is used.
- transplanting the antibody into the body we succeeded in producing a humanized antibody with an activity equal to or higher than that of the original mouse antibody.
- QUANTAZCHARMm or Mo de 1 er both Morekyu error Simulations (Molecular Simulations Inc.) Co., Ltd.) is possible for the force s interest such as.
- FR amino acids that contribute to the maintenance of CDR construction are selected.
- amino acids that directly or indirectly form hydrogen bonds or energy contacts with CDR amino acids are selected by using a calculation program installed in the above software.
- Amino acids to be transplanted with the CDR are selected from these.
- amino acids not found in human antibodies that are expected to elicit antigenicity in human organisms In the event that a sequence is generated, it shall not be transplanted.
- each variable region amino acid in a mouse antibody to that in a human antibody is determined by the classification of Kabat et al. (Sequence 'ob' Proteins .ob 'Immunological Interest. (Sequence of Proteins of Immunological Interest) Fourth Edition, No., 'Brick Health Service, NIH, Washington, DC, 1998. It has become a standard in this field.
- the present invention has been reached which can provide a humanized immunoglobulin having an activity equal to or higher than that of the original mouse antibody.
- Fas-Fas ligand complex In addition, the interaction region between human Fas and Fas ligand has not been clarified, and modeling of the Fas-Fas ligand complex and crystal structure analysis have not been performed. It is unclear which region of the Fas ligand or Fas antigen is effective to suppress (or inhibit) apoptosis caused by the physiological response of the Fas ligand.
- Fas ligand mutant Fas ligand
- N ⁇ ⁇ K 1 which is a hybridoma described in Japanese Patent Application No. 303492/1995.
- N0K2, NOK 3 Anti-Fas ligand monoclonal antibodies (hereinafter simply referred to as ⁇ 1, N0K2, NOK3 and NOK4 immunoglobulins (antibodies), respectively) produced by NOK4 and NOK4, respectively.
- Deposited at the Institute 1-3 1-3 Higashi, Tsukuba, Ibaraki, Japan
- NOK antibodies are sometimes collectively referred to as NOK antibodies.
- the Fas ligand (hereinafter also referred to as FasL) is a ligand of the Fas antigen which is a cell surface protein that mediates programmed cell death (apoptosis).
- FasL the Fas ligand
- mouse Fas ligands have been identified.
- Fs ligands a wide range of Fs ligands is targeted, and among these, Fs ligands of human and mouse species are particularly preferred. That is, the present invention preferably provides a humanized immunoglobulin which specifically reacts with a ligand of human Fas3 ⁇ 4 and a ligand of mouse Fas3 ⁇ 4, and an active fragment thereof.
- immunoglobulin refers to a protein consisting of one or more polypeptides that are substantially encoded by an immunoglobulin gene.
- the immunoglobulin genes of the present invention include katsuno, ', lambda, alpha, gamma, and del. Includes T, Ibushi and Myu constant region genes and myriad immunoglobulin variable region genes.
- immunoglobulin also includes an active fragment.
- An active fragment refers to a fragment of an antibody having antigen-antibody reaction activity.
- chimeric antibody refers to a gene obtained by constructing a light chain gene and a heavy chain gene from immunoglobulin gene fragments belonging to different species, typically by genetic engineering.
- the variable (V) region gene fragment from mouse monochrome one monoclonal antibody may be linked human constant (C) region fragment, for example, 7 1 or 7 4.
- C human constant
- a typical therapeutic chimeric antibody is a hybrid protein consisting of V or antigen binding domain from mouse antibody and C or effector domain from human immunoglobulin. is there.
- framework region refers to the relatively conserved (ie, other than CDR) immunoglobulin light and heavy chain variable regions among various immunoglobulins in a single species.
- a "human framework region” is one that is substantially identical (about 85% or more) to the framework regions of naturally occurring human immunoglobulin or to the consensus sequence of some such immunoglobulins. This is the framework area.
- the term "humanized immunoglobulin” refers to an immunoglobulin containing at least one CDR from a human framework, non-human immunoglobulin, and the constant region present therein is a human immunoglobulin.
- globulin constant region that is, at least about 85 to 90%, preferably at least 9% of the amino acid sequence constituting the protein. 5% identical.
- all parts of the humanized immunoglobulin, except possibly the CDRs, are substantially identical to corresponding parts of one or more natural human immunoglobulin sequences.
- Humanized immunoglobulins have at least three potential advantages over mouse antibodies for therapeutic use in humans.
- the effector moiety is human, it may interact better with other parts of the human immune system (eg, due to complement-dependent cytotoxicity (CDC) or antibody-dependent cellular cytotoxicity (ADCC). Efficient target cell destruction).
- CDC complement-dependent cytotoxicity
- ADCC antibody-dependent cellular cytotoxicity
- the human immune system does not recognize the framework or C region of humanized immunoglobulin as foreign, and therefore unwanted antibody responses to the immunoglobulin may be entirely foreign mouse antibodies or partially foreign. Less than for some chimeric antibodies.
- Humanized immunoglobulins have half-lives that are closer to the half-life of naturally occurring human antibodies and are expected to provide smaller or less frequent doses compared to mouse antibodies.
- the humanized immunoglobulin of the present invention is not particularly limited as long as it specifically reacts with the Fas ligand, but may be capable of inhibiting (suppressing) the physiological reaction between the Fas ligand and Fas. Particularly preferred.
- An immunoglobulin that inhibits a physiological reaction as referred to herein is a cell that expresses a Fas ligand or a Fas ligand that has become a soluble form (hereinafter referred to as sFs ligand or soluble Fas ligand).
- the Fas ligand May bind to cells expressing Fas To give a signal to kill cells expressing Fas by apoptosis, and specifically binds to the binding site of the Fas ligand that binds to Fas, and the Fas ligand cannot bind to Fas
- an immunoglobulin that can function as That is, if there is an immunoglobulin that inhibits the physiological reaction between the Fas ligand and Fas, the cells expressing the Fas ligand or the cells expressing the Fas ligand by the sFas ligand are killed. It cannot be done.
- the immunoglobulin at this time is more preferably an immunoglobulin having a stronger binding force than the binding force between the Fas ligand and Fas.
- Fas-Ig a chimeric molecule in which Fas and IgG Fc are bound
- This Fas-Ig can bind to the Fas ligand with the same binding force as the binding force between the Fas ligand and Fas in the living body. Therefore, if the binding between the Fas ligand and Fas can be inhibited at a lower concentration than the immunoglobulin, Fas, or Fas-Ig chimeric molecule against Fas ligant, in practice, various in vivo The action by the Fas ligand can be effectively inhibited.
- the humanized immunoglobulin specifically reacting with the human Fas ligand of the present invention includes, for example, the invention of Patent Application No. 303492 in 1995, and Accession No. FERM BP-5050 (Hypridoroma N0K2) deposited on March 20 and humanized as a donor antibody, NOK2 antibody produced from NOK2 antibody, RNOK201, RNOK202 and RNOK203 (Hereinafter, humanized NOK2 antibodies are referred to as humanized NOK2 antibodies, humanized NOK2 immunoglobulins, RNOK2 antibodies, or RNOK2 immunoglobulins. Sometimes) .
- a step of humanizing the NOK2 antibody will be outlined below, but the humanized immunoglobulin specifically reacting with the Fas ligand is not particularly limited thereto. Absent.
- V variable
- the V region gene can be cloned by ordinary genetic engineering techniques.
- a V region gene can be obtained from the chromosomal DNA of the cell according to a conventional method (see, for example, T. Maniatis, "Molecular Cloning 7", Cold Spring Harbor 'Laboratory 1, 19982).
- CDNA is synthesized by the method of cloning, or cDNA is synthesized by the conventional method using the mRNA of the cell as a material (for example, DNA Cloning vol. 1, IRL Press, 1985, edited by DM Glover).
- the V region of NOK2 antibody is inherited from the hybridoma producing NOK2 antibody.
- the nucleotide and amino acid sequences can be determined (see FIGS. 1 and 2).
- the chimeric NOK2 antibody gene can be prepared by ligating the thus isolated V region gene fragment upstream of the human immunoglobulin constant region.
- ELISA confirmed that the chimeric NOK2 antibody bound to the Fas ligand molecule in a concentration-dependent manner.
- the immunoglobulin variable region gene cloned by the present inventors showed anti-Fas ligand activity. It is confirmed that it is responsible (see Figure 4).
- Winter et al. Reported on mouse immunoglobulin reslicing (Winter et al., Nature, vol. 332, p. 323-327, 1988) and Chiyosha et al. In reports (Chiyoshi et al., J.
- CDRs are located near CDRs (primary sequences or tertiary structures).
- FR amino acids amino acids in the framework (hereinafter also referred to as FR) region which contributes to the maintenance of deprivation and, consequently, the activity of immunoglobulin is shown.
- amino acids in the FR region that are suggested to contribute to the maintenance of the three-dimensional structure of the CDR and thus to the activity of immunoglobulin are also transplanted together with the CDR.
- the FR amino acids to be transplanted were calculated from the results of computer modeling of the N0K2 antibody, CDR amino acids), or those that have been suggested to interact directly or indirectly.
- the three-dimensional structure of the NOK2 antibody can be estimated by modeling using software QUANTAZCHARMm or Mode 1 er (both manufactured by Molecular 'Simulations Inc.) running on silicon graphics.
- QUANTAZCHARMm or Mode 1 er both manufactured by Molecular 'Simulations Inc.
- VH H chain variable region
- VL L chain variable region registered in the Brookhaven Protein Data Bank
- 1 FOR VH and PDB ID: 1 TET VL are used as the 3D structure ⁇ , and the molecular design software
- QUANTAZCHARMm or Moder according to the instructions for use, but is not limited to this type II antibody variable region, but can be used for antibodies with homology to other NOK2 antibody variable regions. If the next structure data is available, it can be implemented using it. Also, the molecular design software is not limited to QUANT AZCHARMm or Mode 1 er, but any other molecular design software that can handle general proteins can be implemented.
- the amino acid group (Group 1) in the FR region that makes energy contact with the CDRs of the H chain and L chain of the N0K2 antibody is selected using the built-in program, and the energy is further assigned to them.
- Energy contacts include so-called electrostatic interactions and van der Waalska.
- the amino acid to be grafted on the FR of the variable region of human immunoglobulin together with the CDR amino acid is selected from the first group and the second group.
- an information retrieval software developed at the National Center for Biotechnology Information (NCB I).
- NCB I National Center for Biotechnology Information
- the amino acid sequences of the CDRs of the NO K2 antibody are as follows: heavy chain CDR1, CDR2, and CDR3 are shown in SEQ ID NOs: 1, 2, and 3, respectively, in the sequence listing, and light chain CDR1, CDR2, and CDR 3 is described in SEQ ID NOs: 4, 5, and 6 in the sequence listing, respectively. Note that the definition of the ranges of FR and CDR in the present invention all conforms to the classification of Kabat et al.
- the human immunoglobulin variable region amino acid sequence to be transplanted has high homology to the variable region amino acid sequence of mouse immunoglobulin to be humanized.
- the amino acid sequence of the framework region of the acceptor human immunoglobulin has a homology of at least 60% or more empirically with the amino acid sequence of the framework region of the donor antibody (mouse immunoglobulin). It is desired.
- the database is A human immunoglobulin with a high homology is selected and used for a mouse immunoglobulin to be transformed into a mouse type.
- the CDR of the NOK2 antibody can be transplanted into the variable region of human immunoglobulin.
- the CDR of the VH region (heavy chain variable region) of the NOK2 antibody was converted to the SGI (SEQ ID NO: 7: MRC Collaborative Center), a VH region having the FR (framework) region of human subgroup II. (Donated by Dr. Bendick of MRC Collaborative Center)
- CDR of VL region (light chain variable region) of NOK2 antibody is based on the previously reported human ⁇ FR region of chain. Cloned from REI (W. Palm et al., Physiol. Chem., Vol. 356, p. 167, 1975), which is a VL region, and a cD c library derived from normal human peripheral blood lymphocytes.
- VL region (huVL-19: SEQ ID NO: 8 and huVL-31: SEQ ID NO: 9) having the FR region of the chain is transplanted.
- the actual amino acid transplantation is a humanized anti-HIV immunoglobulin for VH.
- VH gene of RC25 antibody (patent international publication W094 / 20632)
- VL is carried out at the gene level by PCR mutagenesis using the VL gene of chimeric N ⁇ K2 obtained as described above for type I and introducing mutations by PCR.
- the genes coding for the H chain and L chain of the typified NOK2 antibody were prepared by combining two types of H chain and 5 types of L chain so that 10 types of humanized NOK2 antibodies could be prepared by combining them.
- Kinds were made.
- the immunoglobulins of the present invention can be readily produced by a variety of recombinant DNA techniques, and include transfected cells, preferably immortalized eukaryotic cells. For example, it may be ultimately expressed in myeloma or hybridoma cells.
- Humanization license A polynucleotide comprising a first sequence encoding an epidermal globulin framework region and a second set of sequences encoding a desired immunoglobulin complementarity-determining region may be synthesized or with appropriate cDNA and genomic DNA. It is prepared by combining fragments.
- the genes encoding the H chain and L chain for humanized antibody construction prepared as described above are expressed in a host after operably linking the sequences to expression control sequences.
- These expression vectors are typically replicable in the host as episomes or as an integral part of the host chromosome DNA.
- the expression vector contains a selectable marker, such as tetracycline resistance, G418 resistance, mycophenolic acid resistance, or HSV-tk, and allows the detection of cells transformed with the desired DNA sequence. I do.
- E. coli is one prokaryotic host particularly useful for cloning the DNA sequences of the present invention.
- Bacillus such as Bacillus subtilis and other Enterobacteriaceae, such as Salmonella, Serratia, and various Pseudomonas species are used as microbial hosts.
- Bacillus subtilis and other Enterobacteriaceae such as Salmonella, Serratia, and various Pseudomonas species are used as microbial hosts.
- prokaryotic hosts one can also construct expression vectors, which typically contain expression control sequences compatible with the host cell.
- any number of easy preparative one scan promoter system Toributofan (trp) promoter one system, / 5-lactamase promoter one system or be present promoter system force s from scan phage Yo
- the promoter optionally has an ribosome binding site sequence and the like, together with an operator sequence, to regulate expression and to initiate and complete transcription and translation.
- -Other microorganisms such as yeast as eukaryotic hosts
- Saccharomyces has expression control sequences, such as 3-phosphoglycerate It is a preferred host with a promoter containing a kinase or other glycolytic enzyme and an appropriate vector having an origin of replication, terminal sequences and the desired analogs.
- Insect cell cultures can also be used to produce the humanized immunoglobulins of the invention, typically using a baculovirus-based expression system.
- the humanized immunoglobulin can be converted to the humanized form according to the method reported by Zu Petlitz et al. (ZuPutlitz. J. et al., BioZ Technology, vol. 8, p. 65 1-654, 199 0). It can also be produced by expressing a polynucleotide sequence encoding a humanized immunoglobulin.
- mammalian cell cultures are also suitably used to express and produce the humanized immunoglobulins of the invention.
- a number of host cell lines capable of secreting complete immunoglobulin have been developed in the art, including CHO cell lines, various COS cell lines, He1a cells, Preferably, myeloma cell lines and the like, or transformed B cells or hybridomas are exemplified.
- Expression vectors for these cells contain expression control sequences, such as an origin of replication, a promoter, an enhancer, and necessary processing information sites such as a ribosome binding site, an RNA splicing site, a polyadenylation site, and a transcription terminator sequence.
- Preferred expression control sequences are enhancers and promoters derived from immunoglobulin genes, SV40, adenovirus, paciperoma virus, cytomegalovirus, chicken / actin gene, and the like.
- the genes encoding the H chain and L chain of the humanized N0K2 antibody constructed as described above are each a human immunoglobulin constant region gene (H chain: C , L chain: C, enhancer derived from cytomegalovirus, promoter of chicken / actin gene, promoter
- the vector is ligated to an expression vector containing a splicer acceptor site of the glycine gene and a gene (H chain: neor, L chain: dhfr) as a drug resistance matrix, and the vector is used as a host cell.
- the cells are transferred into host cells by well-known methods with modifications depending on the type of the cells. For example, calcium chloride transfection is usually used for prokaryotic cells, while transduction or electroporation with calcium phosphate treatment, lipofection, biolistics, virus, etc. is performed on other cells. Used.
- the complete immunoglobulins of the invention can be prepared according to standard methods in the art. Purified. The method includes ammonium sulfate precipitation, various ion exchange chromatography, affinity column chromatography, and the like.
- substantially pure immunoglobulin of at least about 90-95% homogeneity is preferred, and 98-99% or more homogeneity is preferred.
- the humanized immunoglobulin of the present invention is capable of causing apoptosis induced by soluble Fas ligand on Fas-expressing cells when the immunoglobulin concentration is in a range of 0.06 g / m 1 (effective effective temperature) or more. It can be suppressed with an apoptosis suppression rate of 90% or more.
- the apoptosis suppression rate is defined as a soluble Fas ligand prepared from the culture supernatant of a cell transfected with a Fas ligand as a single effector molecule, while a cell transfected with a Fas gene as a target cell.
- the two cells are reacted in a 96-well plate in a 1001 reaction system, and the viability of the target cells after 16 hours is measured using a viable cell number detection reagent. In a damage response test, it means the survival rate of target cells when immunoglobulin is added.
- the apoptosis-inhibiting activity of the humanized immunoglobulin of the present invention is higher than when the same concentration of the mouse immunoglobulin, which is the original donor antibody, is used.
- the humanized immunoglobulin of the present invention was considered. Clearly, this is a rare success.
- the activity of the humanized immunoglobulin of the present invention for suppressing abotosis is higher than that of the Fas-Ig chimeric molecule.
- a mouse antibody serving as a donor antibody for producing the humanized antibody of the present invention has an antibody concentration of 0.01 to 8 g / m1 ( (Effective concentration) at a higher concentration than the Fas-Ig chimera molecule at the same concentration.
- a humanized immunoglobulin of Honki Akira having activity equal to or higher than that of the mouse antibody was 0.01 to 8 g /
- an antibody concentration (effective concentration) of ml it is apparent that the antibody has an apoptosis inhibitory activity equal to or higher than that of the Fas-Ig chimeric molecule.
- the humanized immunoglobulin of the present invention is useful not only for immunochemical research but also for immunotherapy and diagnosis. To achieve the above object, it is not always necessary to use the entire immunoglobulin molecule, as long as they have the activity, can be used a part of the molecule, in some cases even better force? Preferred that. This is easily understood by those skilled in the art. Accordingly, the present invention also includes active fragments of anti-Fas ligand immunoglobulin. Antibodies are homogeneous immunoglobulins that recognize specific antigenic substances.
- the active fragment refers to a fragment of immunoglobulin having antigen-antibody reaction activity, and specifically includes F (ab ') 2, Fab', Fab, Fv, and recombinant Fv form.
- the F (ab ') 2 fragment is one of the fragments obtained by digesting immunoglobulin IgG with pepsin.
- IgG is digested with pepsin near pH 4.0, it is cleaved at the hinge of the H chain to generate a fragment having a molecular weight of about 100,000. This cleavage occurs C-terminal to the disulfide bond between the heavy chains. Since this fragment has two antigen-binding sites, it can bind to an antigen and cause a sedimentation reaction or an agglutination reaction.
- F ab 'fragment is F
- the Fab fragment (antigen-binding fragment) is one of the fragments obtained by papain digestion of IgG. Papain digestion of IgG in the presence of cysteine The H chain is cleaved N-terminal to the disulfide bond between the H chains in the dipart to generate two Fabs and one Fc (crystallizable fragment).
- the Fab fragment is a fragment having a molecular weight of about 45,000 in which an Fd fragment (VH domain + CH1 domain) corresponding to about half of the N-terminal side of the H chain and a L chain are disulfide bonded.
- the Fab fragment has one antigen-binding site.
- An Fv fragment is an antigen-binding fragment comprising an H-chain variable region (VH) and an L-chain variable region (VL) linked by a non-coupling bond.
- Recombinant Fvs are prepared by sequencing DNA from hybridomas that produce immunoglobulins, determining the nucleotide sequences encoding VH and LH, and then incorporating these DNA fragments into vectors.
- VL-linker-VH can be obtained by producing a monovalent antibody active fragment having the structure of VH. In IgG, Fab or F (ab ') 2, VH and LH are connected by an S--S bond.
- a linker is inserted between VH and LH. The same three-dimensional structure as in the state of S—S bond is obtained. This fragment is sometimes referred to simply as FV, and is also called sc Fv (—main chain Fv).
- the recombinant Fv can also be expressed by a microorganism such as Escherichia coli or bacteriophage.
- active fragments can be used as a new complex by binding to a substance such as albumin or polyethylene glycol if necessary.
- a substance such as albumin or polyethylene glycol
- Such composites are most likely to exhibit their effects in vivo without being decomposed for a long time.
- Methods for adding substances such as albumin and polyethylene glycol to the active fragment are described, for example, in Antibodies, A. Lab. Laboratory Manual), Cold Spring Hubber and Laboratory, 1988.
- a bivalent reactive reagent such as SPDP (manufactured by Pharmacia) allows the active fragment to be easily bound to albumin or the like.
- the immunoglobulins of the invention and their pharmaceutical compositions are particularly useful for parenteral administration, i.e., subcutaneous, intramuscular or intravenous administration, and are usually dissolved in an acceptable carrier, preferably an aqueous carrier.
- an acceptable carrier preferably an aqueous carrier.
- aqueous carriers for example, water, buffers, phosphate buffered saline (PBS), 0.4% saline, 0.3% glycine, human albumin solutions and the like can be used. These solutions are sterile and generally free of particulate matter.
- PBS phosphate buffered saline
- glycine 0.3% glycine
- human albumin solutions and the like
- the composition may, if desired, be pharmaceutically acceptable auxiliary substances, such as pH adjusting and buffering agents, for example sodium phosphate, sodium chloride, sodium chloride, potassium chloride, chloride, in order to approximate physiological conditions. It may include calcium and sodium citrate.
- concentration of immunoglobulin in these preparations can be varied over a wide range, ie from about 1% to 20% by weight, mainly based on the volume, viscosity etc., according to the particular mode of administration chosen. Selected.
- the immunoglobulins of the invention may be frozen or lyophilized for storage, if necessary, and reconstituted in a suitable lysate prior to use.
- Fas ligands By using a plurality of mutant Fas ligands in which an amino acid substitution is introduced into a part of the amino acid sequence of the Fas ligand, it is possible to identify a recognition region on the Fas ligand to which an anti-Fas ligand antibody binds. .
- NOK antibody and humanized NOK2 antibody widely bind to the amino acid sequence contained in the region from Arg at position 198 to Met at position 238 of Fas ligand. Indicated.
- NOKl, NOK2, and NOK4 antibodies the results of mapping of the recognition region using synthetic peptides also show that the N0K1, N0K2, and NOK4 antibodies recognize and bind the antigen in the above-described region of the Fas ligand. It was once again suggested that chromosome contains an amino acid that plays an important role.
- the above-mentioned NOK antibody is a monoclonal antibody obtained by immunizing mice with Fas ligand-expressing cells (described in the specification of Japanese Patent Application No. 303492, detailed description of the invention, and Example 1).
- the above-mentioned NOK antibody and humanized NOK2 antibody are antibodies having a strong inhibitory activity on apoptosis induced by Fas-expressing cells through the interaction of Fas-Fas ligand (Hirano et al. Patent Application No. 303492, Detailed Description of the Invention, Example 1 and 2 and described in the present patent application, specification, detailed description of the invention, and Example 4).
- the NOK antibody is the first anti-Fas ligand monoclonal antibody with high apoptosis-suppressing activity obtained by immunizing a natively formed Fas ligand.
- the amino acid sequences of CDRs (complementarity determining regions) of these monoclonal antibodies are different from each other, and the classes and subclasses of the antibodies are also different, that is, they are completely independent antibodies.
- these completely distinct antibody recognition regions are located in a wide region formed by the amino acid sequence from the 198th Arg to the 238th Met amino acid sequence of the Fas ligand. It can be concluded that an anti-Fas ligand antibody having a high apoptosis-inhibiting activity generally recognizes the amino acid contained in the above region as a recognition region.
- the above-mentioned region is a region existing in the Fs ligand molecule and capable of eliciting an anti-Fas ligand antibody having high apoptosis inhibitory activity.
- the above region is important for the Fas ligand to exhibit apoptosis-inducing activity, suggesting that a substance that can recognize and bind to this region can exhibit apoptosis-inhibitory activity. .
- F as ligand molecule monomer of modeling one Bun proteinase fin data bank (Brookhaven Protein Data Bank) to Brook has been registered in (PDB), F homology to as ligand force s high TNF a (PDB ID : 1 TNF) and TNF /? (PDB ID: 1 TNR) Type III can be performed using the molecular design software, Model 1er (Molecular Simulations), according to the instruction manual.
- the Fs ligand trimer model was generated using the molecular design software QUANTA, CHAR Mm (Molecular Simulations) and TNF.
- the above-mentioned Fas ligand monomer model can be constructed by superimposing (superimposing) each of the TNF monomer segments on the atomic coordinates of PDB ID: 1 TNF, which is a trimer of TNF.
- TNF is also a type II protein. And /? Were used, but are not limited to TNF ⁇ and TNF as long as they are one of the TNF families.
- each of the above-mentioned antibodies formed a Fas ligand trimer force . It has been revealed that it binds to a wide range of domains spanning two molecules of the Fas ligand that appears for the first time. In the context of the relationship between Fa ligands and anti-Fas ligand antibodies, such findings are novel and unprecedented.
- the antigen-binding region of an antibody is a region consisting of six sites called CDRs (complementarity determining regions).
- CDRs complementarity determining regions
- the size of the region varies depending on the antigen to which it binds, but is approximately 700 for normal large protein antigens.
- Square Angstrom Supervised by Takehiko Sasazuki Osamu, Immunobiology, Nankodo, pp. 128, 1995
- Square Angstrom Supervised by Takehiko Sasazuki Osamu, Immunobiology, Nankodo, pp. 128, 1995
- Square Angstrom Supervised by Takehiko Sasazuki Osamu, Immunobiology, Nankodo, pp. 128, 1995
- Square Angstrom Supervised by Takehiko Sasazuki Osamu, Immunobiology, Nankodo, pp. 128, 1995
- Square Angstrom Supervised by Takehiko Sasazuki Osamu, Immunobiology,
- the Fas ligand molecule is normally present on the cell surface as a transmembrane protein of about 40 kD, but its extracellular domain can be processed to exist as a free molecule of about 27 kD. .
- the ability of the Fs ligand monomer to form a Fs ligand trimer through trimolecular association ? It is said that you can do it.
- antigens and antibodies are in full surface-to-face contact with each other using the CDR regions fully (supervised by Takehiko Sasazuki, Immunobiology, Nankodo, p. 128, 1 995).
- the region related to the suppression of apoptosis activity on the Fas ligand trimer revealed by the present invention can be expressed as a surface.
- the surface is not on a straight line.
- the surface of the antigen present in the Fas ligand trimer model can be calculated.
- the amino acids required to define such a plane can be set as three amino acids arbitrarily selected from the amino acids recognized by each antibody.
- One of the two Fas ligand molecules is number 200 G1n, and the other is a number 203 Asn and a number 220 Gln on the other Fas ligand molecule.
- the plane defined by the combination of the coordinates of the carbon (Co) atom at the a-position of each of these amino acids can cover the area plane composed of the recognition amino acid of each antibody.
- the surface that comes into contact with the actual antibody or the surface where the atoms of the antibody pass toward the Fas ligand trimer The each C.
- the length of the side chain of the amino acid residue and a more general van der Waals contact cut-off (Cu toff) value of about 4.1 angstroms It is considered that the surface is structured as follows.
- the size of the CDR region of the anti-Fas ligand antibody makes it possible to identify the amino acids that constitute the region associated with suppression of apoptosis activity on the Fs ligand trimer. is there.
- the size of the CDR region of the anti-Fas ligand antibody is considered to be not significantly different from that of a general antibody from the length of the amino acid sequence of its variable region.
- the above-described three-dimensional structural model of the N0K2 antibody was used as a representative of the anti-Fas ligand antibody. Since the number of amino acids in the region is not significantly different between each N0K antibody and humanized N0K2 antibody, either antibody may be used.
- the measurement of the size of the CDR region is not limited to these antibodies.
- a trimer amino acid can interact with the amino acid in the CDR region of the anti-Fas ligand antibody.
- Anti Amino acids capable of interacting with the CDR region amino acids of the Fas ligand antibody are all potential amino acids within this circle and exposed on the Fas ligand trimer, s , 15 sq. Angstroms It is desirable to select it as the surface amino acid of the Fas ligand trimer having the exposed surface area of the above amino acid residues.
- the preferred amino acids are the 153 Ser, 166 Tyr, 168 Ile, 198 Arg, 199 Gly, and 200 of one of the two adjacent Fas ligand molecules.
- Examples include the amino acids 262 Ser, 263 Glu, 264 and 6 !, and 265 Ser. That is, interacting with the amino acids contained in these regions on the Fas ligand trimer is important for a protein, a peptide, and preferably an antibody or the like having a high apoptosis inhibitory activity. .
- the substance exhibiting the apoptosis-suppressing activity of the present invention includes, in addition to the humanized immunoglobulin which specifically reacts with the Fas ligand, the domain, region or region thereof important for the apoptosis-suppressing activity on the aforementioned Fas ligand.
- any substance capable of specifically recognizing and reacting with amino acids It may be.
- a substance that recognizes and binds to a specific amino acid on a protein molecule, such as immunoglobulin is preferable.
- a receptor derived from immunoglobulin or a fragment thereof, or an improved receptor capable of recognizing the above-mentioned regions is preferred.
- Preferable substances include variants, enzymes that recognize and react with specific amino acids, and the like. Since these protein substances can be produced by genetic recombination technology, they can also be defined as recombinant proteins.
- synthetic peptides based on amino acid sequences derived from such proteinaceous substances, and peptide libraries having random sequences such as phage display systems are important for apoptosis-inhibitory activity on Fas ligand.
- a peptide with an entirely new sequence obtained by screening based on the recognition ability of a domain, region or its amino acid as an index, and a synthetic peptide not found in nature based on those peptides
- the identified peptide-like substances are also candidates for recognition substances.
- the humanized immunoglobulin of the present invention which has an activity of specifically reacting with a Fas ligand and suppressing the physiological response, is a therapeutic agent for those diseases.
- GVHD bone marrow transplantation
- SLE fulminant hepatitis
- RA autoimmune diseases
- the region required for scavenging the apoptosis-inducing activity on the Fas ligand revealed by the present invention is also highly important as a region for inducing an anti-Fas ligand antibody having a high apoptosis-suppressing activity. .
- This finding provides important information for designing various other apoptosis-inhibiting molecules. In other words, based on the above findings, it is possible to specifically react against the amino acids contained in the above region. In response, recombinant proteins and peptides that suppress apoptosis can be produced and applied to new therapeutic agents or clinical diagnostic agents.
- a cDNA prepared from human killer T cells expressing a Fas ligand by a conventional method was type II, reported by Nagata et al. (Nagata et al., Cell, vol.75, p.1169—1178) PCR was performed using primers prepared based on the method described in US Pat.
- the amplified gene is ligated to the expression vector BCMGSNeo (Ichi Karasuyama, Genetic Handbook for Experimental Medicine, Yodosha, p. 297-299, 19992) using the restriction enzyme cleavage site added to the primer.
- BCMGSNeo Ichi Karasuyama, Genetic Handbook for Experimental Medicine, Yodosha, p. 297-299, 19992
- a Fas ligand expression plasmid was prepared.
- the expression plasmid, F the as ligand expressing CO S cells force?
- the immunoglobulin present in the culture supernatant obtained by culturing each clone is screened by measuring the apoptosis inhibitory activity described below, and reacts specifically with the Fas ligand.
- Hypri-doma producing monoclonal antibody NOK2 (Hypri-doma NO K 2 with accession number FERM BP-5045, deposited at the National Institute of Bioscience and Biotechnology).
- the mouse immunoglobulin variable (V) region gene was isolated as follows. First, total RNA was extracted from NOK2-producing hybridoma cells using the RNA extraction reagent Isogen (trade name) manufactured by Futsubone Gene. The method followed the protocol attached to the kit. The hybridoma producing NOK2 antibody is the same as FERM BP-5045 deposited at the Institute of Biotechnology and Industrial Technology, National Institute of Advanced Industrial Science and Technology. Next, a STRATAGENE polystyrene was extracted from the extracted total RNA.
- a messenger RNA (mRNA) was prepared using a quick mRNA isolation (POLY (A) QUIK mRNA I SOLATI ON) kit (trade name). The method followed the protocol attached to the kit. Subsequently, the mRNA was converted into a single-strand cDNA using the First Strand cDNA Synthesis Kit (trade name) manufactured by Pharmasia Biotech. . The primer uses the oligo (dT) primer attached to the kit, and the method is as follows. Followinged the protocol. The single-strand cDNA obtained in this manner was type III, and the nucleic acid base sequences of the V region and J region (sequence of proteins-proteins.
- PCR was performed using a kit manufactured by Perkin Elmer Co., Ltd. according to the attached protocol. PCR conditions were performed at 94 ° C for 1 minute, 60 ° C for 2 minutes, and 72 ° C for 2 minutes for 35 cycles. After PCR, the obtained DNA fragment was cloned into pCRII vector (trade name) manufactured by Invitrogen. The method followed the attached protocol.
- a mouse-human chimeric antibody was prepared to confirm whether the isolated N0K2 antibody V region gene was indeed a gene encoding the V region responsible for anti-Fas ligand activity.
- expression vectors containing the chicken actin gene promoter and the heron /?-Globin gene splicing receptor sequence and the cytomegalovirus-derived enhancer yuichi pCAG— / using c and p C AG- 7 1.
- Patent application WO 94/20632 discloses a human immunoglobulin derived from RHC25 plasmid, which is a light chain expression plasmid, of RC25 which is a humanized anti-HIV neutralizing monoclonal antibody.
- RHC25 plasmid which is a light chain expression plasmid, of RC25 which is a humanized anti-HIV neutralizing monoclonal antibody.
- Linkage between the Enhansa of tomegalovirus (CMV) and the promoter of the chicken / 3 -actin gene and the spliced receptor of the / 3 / globin gene of the egret by conventional genetic engineering techniques. so That.
- CMV tomegalovirus
- the promoter of the chicken / 3 -actin gene and the spliced receptor of the / 3 / globin gene of the egret by conventional genetic engineering techniques. so That.
- One-globin gene of the vector one plasmid H ind III site force s human A BamHI site is added upstream of the immunoglobulin
- pCAG-71 is a human immunoglobulin derived from HCMV-VH 0.5 /?-1 plasmid described in the literature (Maeda et al., Hum. Antibod. Hybridoraas, vol. 2, p124-134, 1991). 1 constant region gene and polyadenylation site, neor gene and SV40 promoter as selection markers in eukaryotic cells derived from pAd.RE. neoplasm described in JP-A-2-5890.
- the HindIII site has a BamHI site added upstream of the human immunoglobuliner 1 constant region gene.
- plasmid DNAs CNOK2H and CNOK2L described above were purified from CHO-DG44 cells (Chasin, LA, et al., Et al. Genet., Vol. 12, p. 555-566, 1986). The method basically followed the protocol attached to the Lipfect ACE. Briefly, first, 1 ⁇ g of both plasmid DNAs prepared using a kit manufactured by QIAGEN was linearized with a restriction enzyme ⁇ VuI, and mixed with Lip0fect ACE.
- the transformed cells thus obtained were subcultured and expanded in the above-mentioned medium, and when they reached confluence in a 75 cm2 culture flask (manufactured by CORNING), 20 ml of AS The medium was switched to F medium (trade name) (manufactured by Ajinomoto Co., Inc.), and cultured under conditions of 37T :, 5% C% 2 for 7 days, and the supernatant was recovered.
- F medium trade name
- the plate was washed three times with 0.01M PBS containing Tween 20. Subsequently, PBS containing 1% BSA was added in a 100/1 well and incubated at 37 ° C. for 3 hours. After washing again with 0.01 M PBS containing 0.05% Tween 20 three times, the above-mentioned culture supernatant concentrate was added at 5 O1 / Pell, and incubated at 37 ° C for 1 hour. Thereafter, the plate was washed three times with 0.05 M Tween 20 containing 0.05% Tween 20, and an HRP-labeled anti-human Ig—C ⁇ antibody of a secondary antibody (Southern's Biotechnology Associato (Southern)
- RC25 antibody As a standard human IgG, a purified product (purity 98%) of RC25 antibody (patent international publication WO94 / 20632) which is an anti-HIV neutralizing monoclonal antibody having the same Fc and CK as the chimeric NOK2 antibody % Or more).
- the method from the isolation of the Fas ligand gene to the production of the cells expressing the Fas ligand and the preparation of the soluble Fas ligand molecule is the same as the method described in Japanese Patent Application No. 303492, 1995.
- the outline is described below.
- cDNA was prepared from human killer T cells expressing human Fas ligand based on mRNA extracted by a conventional method.
- the primers (5, side) described in Nagata et al. (Osada et al., Int. Immunol., Vol. 6, No. 10, p. 1567-154, 194) are described.
- PCR was performed using the above cDNA as a type II, and human F The as-ligand gene was obtained.
- This human Fas ligand gene was transferred to the expression vector BCMGSNeo (Ichi Karasuyama, Handbook of Genetic Engineering, Yodosha, p.29-29) at the Xh0I site and the N0tI site. 9, 1992) to obtain a human Fas ligand expression plasmid (human MG ligand BCMG SNeo).
- this plasmid was amplified and recovered in Escherichia coli by a conventional method, and then subjected to the DEAE-dextran method (Experimental Medicine Separate Biomanual Series 4, Gene Transfer and Expression Analysis, Yodosha, p. 16- 22, 1994), and introduced into COS cells (ATCC CRL 1.650) to obtain COS cells expressing Fas ligand.
- the Fas ligand-expressing C0S cells were cultured in a 10% FCS-DME medium, and the Fas ligand molecules released in the culture supernatant were subjected to the patent application No. 0334992 in 1995.
- the solution was sterilized by filtration through a 45 ⁇ m filter, and this was used as a soluble Fas ligand molecule. Purification of the Fas ligand was confirmed by SDS-PAGE as the detection of a single band. The concentration of the Fas ligand was determined based on the absorbance at a wavelength of 280 nm.
- PBS containing 1% BSA was added at 1001 nowell, and incubated at 37 ° C for 2 hours. Again, after washing three times with 0.01 MPBS containing 0.05% Tween 20, the above-described culture supernatant concentrate (prepared with 114) was added at 50 1 / Pel, and incubated at 37 for 2 hours. After that, the plate was washed three times with 0.01M PBS containing 0.05% Tween 20, and HRP-labeled anti-human Ig-C ⁇ antibody (manufactured by Sothan Biotechnology Inc.) as a secondary antibody was added to 0.1% PBS. A 5000-fold dilution with PBS containing 1% BSA was added at 50 1 / well.
- CDRs complementarity determining regions; SEQ ID NOs: 1 to 6
- SEQ ID NOs: 1 to 6 complementarity determining regions
- the method followed the method for producing humanized immunoglobulin (JP-A-4-11095).
- the CDR of the VH region of NOK2 antibody is transplanted to SGI (donated by Dr. Bendick of the MRC Collaborative Center in the UK), a VH region with the FR (framework) region of human subgroup II. did.
- the CDR of the VL region of the NOK2 antibody is based on the previously reported REI, a VL region having the FR region of the human ⁇ chain (Pammu et al., Physiol. Chem., Vol. 356, p. 167, 1975). ), And cloned from a cDNA library derived from a normal human peripheral blood lymphocyte, and transplanted into VL regions (huVL-19 and huVL-31) having the FR region of the chain.
- a putative three-dimensional structure of the NOK2 antibody was constructed by computer modeling. Specifically, a homologous search with the Brookhaven Protein Data Bank (PDB) was performed based on the amino acid sequences of the variable regions of the N0K2 antibody heavy and light chains, and ⁇ The heavy chain variable region (PDB ID: 1 FOR) and the positive chain variable region (PDB ID: 1 TET) of the antibody to be the template were selected. Next, the software QUANT AZ that runs on silicon graphics
- Modeling was performed using CHARMm (Molecular 'Simulations').
- the modeling process consists of 1) copying the amino acid sequence of the N0K2 antibody to the atomic coordinates of the type III variable region amino acid, and 2) calculating the energy minimization (maximum gradient). Oblique method), 3) Cooling from 300 K to 0 K in 2,400 steps, 4) Energy minimization calculation (maximum gradient method), 5) Heating from 0 0 to 300 7, in 7,500 steps 6) 30,000 steps (equivalent to 30 ps) of equilibrium; and 7) 20,000 steps (equivalent to 20 ps) of simulation.
- CHARMm Molecular 'Simulations'
- the amino acid group (Group 1) in the FR region that makes energy contact with the CDRs of the ⁇ chain and the L chain is selected, and the energy contact is made to them.
- Amino acids in the FR region (Group 2) were selected.
- the energy contact here includes so-called electrostatic interaction and van der Waals force.
- the initial settings of the above program were adopted.
- the FR amino acids selected in four or more species are referred to as CDR amino acids as FR amino acids that contribute to the maintenance of the CDR steric structure.
- RNAOK 2 VH erll SEQ ID NO: 18
- RNOK 2 VH Ver 12 SEQ ID NO: 19
- humanized VL hu VL—19 and hu VL-DNA obtained from the RNOK 2 VL verl (SEQ ID NO: 20)
- cDNA library were transplanted into the REI of the human immunoglobulin VL region. as porting to 3 0, stomach a certain amino acids in the FR 1 made a 2 amino acid mosquitoes four different types of variator one Deployment (RNOK 2 VL V er 2 1 :?
- Figs. The NOK2 antibody and the human immunoglobulin to be transplanted and the VH and VL amino acid sequences of the respective humanized NOK2 antibodies to be constructed are shown in Figs. Ami Uppercase letters in the noic acid sequence are common to the N0K2 antibody and the transplanted human antibody, and lowercase letters are different amino acids. The amino acids boxed are FR amino acids selected by the method described in the previous section, and are to be transplanted into human immunoglobulin together with CDR amino acids.
- the actual amino acid transplantation was performed by obtaining the VH gene of the RC25 antibody (patented international patent application WO 94 20632), which is a humanized anti-HIV immunoglobulin, for VH into type II and VL as described above.
- the chimeric NOK2 VL gene was used for type I, and the mutation was introduced at the gene level by PCR mutagenesis to introduce mutations by PCR.
- a gene encoding the amino acid sequence of the antibody has been constructed.
- FIGS. 8 to 13 show that the synthetic primers used for PCR mutagenesis anneal to the respective type I VH and VL regions.
- PCR was carried out using a kit manufactured by Perkin and Elma Inc. according to the attached protocol. The PCR conditions were 95 ° C for 1 minute, 60 ° C for 1 minute, and 72 cycles of 2 minutes for 30 cycles.
- plasmid RHC25 Japanese Patent Publication No. WO 94/20632 obtained by cloning the heavy chain gene of humanized C25 immunoglobulin is designated as ⁇ , and the primer pAGF ( Amplify the 5 'side of the VH gene using SEQ ID NO: 25) and primer # 01 (SEQ ID NO: 26), and use # 02 (SEQ ID NO: 27) or # 03 (SEQ ID NO: 28) and # 04 (SEQ ID NO: 29) was used to amplify the 3 'side of the VH gene
- the 5 'side of the VL gene was amplified using primers # 05 (SEQ ID NO: 30) and # 06 (SEQ ID NO: 31) using the VL of the chimeric NO K2 as type III, and the # 07 (sequence) No. 32) and # 08 (SEQ ID NO: 33) were used to amplify the intermediate portion, and # 09 (SEQ ID NO: 34) and # 10 (SEQ ID NO: 35) were used to amplify the 3'-side.
- the three amplified gene fragments obtained here were mixed in equal amounts to form a ⁇ , and PCR was performed using # 05 and # 10.
- the amplified gene fragment obtained in this way is ligated to the humanized NOK2 antibody VL gene RNOK2 VL by ligating it at the ApaI site in the Leader region gene upstream of the human immunoglobulin SGI VH gene. Ver 1 was prepared.
- VL VL
- primers # 11 SEQ ID NO: 36
- # 12 SEQ ID NO: 37
- Primer # 11 contains variants in the nucleic acid sequence to create variants of RNOK2 VL Ver 21, 22, 23 and 24.
- the amplified gene fragment obtained in this manner is ligated to the humanized NOK2 antibody VL gene RN0K2 VL V by ligating at the ApaI site in the Leader region gene upstream of the VH gene of human immunoglobulin SGI. er 21, 22, 23 and 24 were prepared.
- Each of these humanized VH and VL region fragments was designated as Hindlll and BamHI restriction.
- each of the above humanized NOK2 immunoglobulin gene expression plasmids was prepared in the same manner as in the preparation of chimeric antibodies (see Example 1).
- DNA was introduced into CHO-DG44 cells. The method was performed using Lip0fECT ACE as in the case of the chimeric antibody.
- RNOK20K RNOK202 and RNOK203 described later were expressed by a combination of RNOK2 VHv erl 1 and RNOK2VLv erl, RNOK2 VH ver 11 and RNOK2 VL ver 2 RN ⁇ K2VHv erll and RNOK2 VL ver 22, respectively.
- RNOK2 antibodies are hereinafter collectively referred to as RNOK2 antibodies or RNOK2 immunoglobulins.
- the supernatant obtained by culturing the transformed cells ELISA using anti-human IgGa1 and anti-human IgG / c was performed in the same manner as for the quantification of the melanoantibody.As a result, it was confirmed that human immunoglobulin was produced in the culture supernatant. Was.
- RNOK2 immunoglobulin-producing transformed cells obtained as described in Example 2 were first placed in a 75 cm2 culture flask (manufactured by Corning Incorporated) in ImM G418 ( in Gibco BRL) and nucleotide-free for -MEM medium containing 10% dialyzed fetal bovine serum (Gibco BRL) (Gibco BRL) under the condition of 37 ° C, 5% C_ ⁇ 2 And cultured until confluent.
- a soluble Fast ligand molecule was prepared by the same method as described in Example 16).
- the purified RNOK2 immunoglobulin prepared by the method described in Example 3 was diluted with 10% FC SRPM I 1640 medium to prepare the following 12 concentrations of immunoglobulin solutions.
- the immunoglobulin concentrations were 4 gZml 2 ⁇ g / m 1, 1 ⁇ g / m 1 ⁇ 0. ⁇ g / m 1, 0.25 g / ml, 0.125 ⁇ g / m 1, 0.06 2 5 ⁇ g / m 1, 0.0 3 1 2 5 ⁇ g / m 1, 0.01 5 6 3 ⁇ g / m 1, 0.0 0 7 8 1 3 ⁇ g / m 1, 0.03 9 06 / m 1, 0. 0 19 5 3 2 / / 1111 were prepared in 100 1 each. Since these immunoglobulins will eventually contain 1/4 volume of 251 in a 1001 reaction system, the final effective concentration will be one-fourth of the above portability o
- Hypri-Doma NO K2 (hybridoma with accession number FERM BP-5045 deposited with the National Institute of Bioscience and Biotechnology) Propagated.
- 3 ⁇ 107 cells were prepared on a scale in which 30 ml of a culture solution was placed in a 75 cm 2 flask (manufactured by Falcon) and cell culture was performed. Specifically, start of culture at a concentration of 2 X 1 05 or Roh m 1, the cells were harvested when it comes to 1 X 1 0 6 or m 1.
- the recovered hybridoma was suspended in 1.5 ml of PBS and administered intraperitoneally to nude mice at 0.5 ml (equivalent to 1 ⁇ 107 cells). After breeding for 10 days, ascites collected in the abdominal cavity was collected. The recovered ascites was 6.7 ml / animal. Of these, 10 ml was used for purification.
- Purification was started by salting out ammonium sulfate with 10 ml (equivalent) of saturated ammonium sulfate added dropwise and mixed with ascites. After stirring at 4 ° C for 2 hours, centrifugation was performed at 10,000 g for 15 minutes. After discarding the supernatant, the precipitate was dissolved in 5 ml of PBS. After that, dialysis was performed overnight with PBS 3 liters. Subsequently, after collecting the dialyzed sample, only the protein G-adsorbed IgG was purified using an FPLC system using a protein G column (manufactured by Pharmacia). The sample was further dialyzed overnight with PBS. The next day, the protein concentration was quantified and the purity was assayed.
- Protein quantification was measured using a BioRad protein quantification reagent. The method followed the protocol attached to the reagent. Purified immunological group Robbulin was subjected to SDS-PAGE under reducing conditions and stained with CBB. As a result, no presence of contaminating proteins was confirmed except for the bands considered to be heavy and light chains, respectively.
- WR19L cells into which the human Fast gene had been introduced were used as target cells.
- the human Fas gene was introduced into WR19L cells (ATC CTIB52) according to a conventional method. Specifically, Okumura et al.'S literature (Okumura et al., Pro Natl. Acad. Sci. USA, vol. 91, No. 11, p4930-49934, 1994) It was prepared for reference. The obtained Fass-WR19L cells were cultured and adjusted to 2 x 105 cells / 1111 in a 10% FCS-RPMI medium.
- the fluorescence intensity was measured at an excitation wavelength of 544 nm and a measurement wavelength of 590 nm using a fluorescence microplate reader (Fluoroskan II (trade name); manufactured by Titertek). This fluorescence intensity reflects the number of viable cells in each well.
- the target Fas-WR without soluble Fas ligand, RN ⁇ K2 immunoglobulin, and mouse N ⁇ K2 immunoglobulin was not included.
- the concentrations of humanized NO NO2 immunoglobulins were all above 0.06 g / ml (effective concentration).
- the apoptosis inhibition rate was 90% or more in the range.
- all of the humanized immunoglobulins of the present invention could suppress the apoptosis-inducing activity of soluble Fas ligand on Fas-expressing cells.
- the humanized immunoglobulin of the present invention has an activity equal to or higher than that of the original mask NOK2 immunoglobulin in the entire concentration range tested. .
- mouse NOK2 immunoglobulin was prepared at an antibody concentration of 0.01 to 8 g / m1 (effective strain) as described in Japanese Patent Application No. 303492/1995. It is known that the apoptotic activity is significantly higher than that of the Fas-Ig chimeric molecule at the same concentration. Therefore, it is clear that the humanized immunoglobulin of the present invention has a stronger affinity for Fas ligand than mouse Fas-Ig and is more effective.
- humanized immunoglobulins of the present invention will preferentially bind to the Fas ligand and bind to the Fas. Suggests binding to the ligand. From this, it can be easily inferred that the humanized immunoglobulin of the present invention can sufficiently suppress the physiological reaction between F s and F s ligand in vivo.
- HindIII of the pCAG-expressing vector lacking the / chain constant region gene of the pCAG- / c expression vector described in Example 1-3 was used.
- a gene in the variable region of the light chain containing the leader sequence of the C25 antibody (described in Patent Publication WO94 / 20632) is cut out at the BamHI site with the above restriction enzyme.
- This plasmid is introduced into Escherichia coli in a conventional manner, and a small-scale plasmid preparation method (Cold Spring Harbor Laboratories) is prepared from cells obtained by culturing the transformed Escherichia coli.
- Fas ligands in which these amino acid substitutions have been introduced are collectively referred to as mutant Fas ligands.
- each of the mutant Fas ligands is obtained by substituting the first Tyr in the underlined part of FIG. 16 with A1a and calling it B1 (hereinafter referred to as B2, B3,. ), But a total of 45 types up to B45 in which the last A1a underlined was replaced with G1y were prepared.
- Fas ligand gene cloned into the expression vector (human Fas ligand-BCMGSNeo) described in section 1-6) of Example 1-6 was designated as type I, and the EP-02 primer sequence (sequence) was used as the sense primer. No .: 38) and PCR using the antisense primer EP-03 primer (SEQ ID NO: 39), and a Fas ligand with no amino acid substitution introduced (to avoid confusion) Then, a Fas ligand into which no amino acid substitution was introduced is referred to as a native Fas ligand).
- TAKARA Ex Taq (trade name) (manufactured by Takara Shuzo Co., Ltd.), prepare a reaction solution according to the attached document, and perform amplification for 30 cycles at 95 ° C for 1 minute, 601 minutes, and 72 ° C for 2 minutes. Done.
- This fragment was ligated to the pCAG expression vector described in Section 5-1) to produce a native Fas ligand expression vector.
- the EP-02 primer contains the KpnI site for linking to the pCAG expression vector described in the previous section, the gene sequence of the rest of the leader sequence of the C25 antibody, and the following.
- a gene sequence encoding the FLAG sequence and a gene sequence encoding the 117th Ser from the N-terminal of the Fas ligand are included.
- the FLAG sequence consists of 8 amino acids (Asp-Tyr-Lys-Asp-Asp-Asp-Asp-Lys). By adding this sequence to the protein to be expressed, it is possible to confirm and quantify the expression of the target protein using an antibody against this sequence. In this experiment, the FLAG sequence was replaced by the third Phe from the N-terminal of the Fs ligand extracellular region.
- the EP-03 primer is added with a gene sequence encoding the amino acid at and after the sixth Phe from the C-terminal of the Fs ligand, a stop codon, and a BamHI site for linking to an expression vector.
- MF primer SEQ ID NO: 40
- Mutant primers in which an A1a or G] y codon has been introduced at the amino acid substitution site (primers corresponding to mutant Fas ligands B1 to B45 are represented by SEQ ID NOs: 41 to 85, respectively) )
- SEQ ID NOs: 41 to 85 SEQ ID NOs: 41 to 85, respectively
- a primer complementary to each of the mutant primers described above (primers complementary to the primers of SEQ ID NOs: 41 to 85 are described in SEQ ID NOs: 86 to 130, respectively) was used as a sense primer.
- the C-terminal side of each mutant Fas ligand was amplified using this and the EP-0.3 primer which is an antisense primer.
- the above-mentioned mutant primers and their complementary primers were synthesized in order of 45 to produce 45 types of mutant Fas ligands from B1 to B45.
- each mutant Fas ligand prepared by the above method was replaced with the above-mentioned native Fas ligand gene on the native Fas ligand expression vector at the Ec0NI-BamHI site, An expression plasmid for each mutant Fas ligand was prepared.
- these plasmids expressing the Fas ligand are introduced into host cells and cultured, the FLAG sequence is inserted into the supernatant at the third Phe site from the N-terminal end of the extracellular region of the Fas ligand.
- the secreted protein is secreted. 5-3) Expression of each mutant F a s ligand
- each mutant Fas ligand constructed by the method described in the previous section is introduced into Escherichia coli by a conventional method, and the resulting transformant Escherichia coli is cultured.
- Plasmid Mini Kit) Product name
- Kiaje The above-mentioned expression plasmid was recovered and purified using the following method (QI AG EN). Subsequently, each purified expression plasmid was introduced into COS cells (ATCC CRL 1650) using Lipfect ACE (trade name) (manufactured by Gibco BRL) in the same manner as described in section 1_4). To obtain a culture supernatant containing the mutant Fas ligand. That is, 1 g of the above expression plasmid
- a mixture with Lipofect ACE was added to COS cells, and cultured overnight at 37 under 5% CO 2 conditions. Then, 4 ml of ASF medium (trade name) (manufactured by Ajinomoto Co.) was added. , 37. C, 5% C0 cultured for 4 days in 2 of the conditions to recover the culture Youe supernatant.
- the native Fas ligand expression plasmid was similarly introduced into COS cells to obtain a culture supernatant.
- a pCAG vector not linked to a Fas ligand gene was introduced into COS cells by the same method as described above, and cultured in the same medium for the same period, and the culture supernatant was recovered.
- the relative concentration of the mutant Fas ligand molecule contained in each culture supernatant was calculated by ELISA.
- the specific method is as follows. First, the culture supernatant containing the above-mentioned native Fas ligand, each culture supernatant containing each mutant Fas ligand molecule, and the culture supernatant of the negative control were serially diluted with ASF medium in 7-fold serial dilutions. Thus, solutions having eight different concentrations were prepared.
- each well was washed three times with 0.01 MPBS containing 0.05% Tween 20, and PBS containing 1% BSA was added in 100 1 dowels.
- PBS containing 1% BSA was added in 100 1 dowels.
- each well was washed three times with 0.01MPBS containing 0.05% Tween 20, and a 25 g / m1 anti-FLA GM2 mouse monoclonal antibody (trade name) (Kodak) was added at 501 / well to each of the 8 wells.
- the relative amount of each mutant Fas ligand was determined based on the coloring intensity of the native Fas ligand. That is, first, from 0 D 4 5 0 value of each Ueru addition of native F the as ligands and mutant F the as ligands of each dilution magnification, 0 D 4 5 0 value of Uweru addition of the negative control of the same dilution ratio The specific color intensity of each gel was determined by calculating a value obtained by subtracting. In the following, when the relationship between the dilution ratio of the OD 4 5 0 value and each culture supernatant in the graph,
- ⁇ _D 4 5 0 value indicates a linear decrease, and select the OD 4 5 0 value in the extent that any of the straight line shows the same slope, native dilution magnification when showing their values Calculated based on the above graph for the Fas ligand and each mutant Fas ligand.
- the relative value of the dilution factor obtained for each mutant Fas ligand was calculated based on the dilution factor obtained for the native Fas ligand, and this relative value was used as the native Fas ligand.
- the relative concentration of each mutant Fas ligand was used as the relative concentration. By performing this operation on each plate, the relative concentration of all mutant Fas ligands relative to the native Fas ligand was obtained.
- the culture supernatant containing the mutant Fas ligand with the lowest relative concentration determined by the method in paragraph 5-4) was used as the new standard. It was diluted with the above-mentioned ASF medium to a certain degree. As a result, the concentration of the mutant Fas ligand or native Fas ligand contained therein was adjusted to be the same for all the solutions.
- N ⁇ K1, NOK2 and NOK2 An anti-Fas ligand monoclonal antibody (hereinafter simply referred to as N ⁇ K1, NOK2 and NOK2, respectively) produced from each of the hybridomas NOK1, NOK2 and NOK3 described in WO 96/29350.
- NOK3 immunoglobulins which are sometimes collectively referred to as N ⁇ K antibodies.
- Hypri-Dorma NOK1, NOK2 and NOK3 are each 3X10 in RPMI 1640 medium containing 10% FCS. It grew to the number. 3 ⁇ 107 cells were prepared on a scale in which 30 ml of a culture solution was placed in a 75 cm 2 flask (manufactured by Falcon) and cell culture was performed. Specifically, start of culture at a concentration of 2 X 105 cells m 1, the cells were harvested when it comes to 1 X 1 0 6 or 1. The collected hybridoma was suspended in 1.5 ml of PBS and administered intraperitoneally to nude mice at 0.5 ml (equivalent to 1 ⁇ 107 cells).
- NOK1 antibody and NOK2 antibody after collecting the dialyzed sample, use a protein G column (trade name) (Pharmasia) to purify only the protein G-adsorbed IgG using the FP LC system. did. The sample was further dialyzed overnight with PBS. The next day, protein concentration was quantified and purity was assayed.
- NOK3 antibody after the dialysis sample is collected, gel filtration is performed with a FPLC system using a Superde X 200 column (trade name) (manufactured by Pharmasia) for gel filtration, and the void volume ( IgM eluted in the void volume)]]. Regarding this IgM, protein quantification and purity were examined.
- the method followed the protocol attached to the reagent.
- the purified immunoglobulin was subjected to SDS-PAGE under reducing conditions and subjected to CBB staining. As a result, no presence of any contaminating proteins was confirmed except for the bands considered to be heavy and light chains, respectively.
- 1 ⁇ 01: 1 antibody is 10 / m1
- NOK2 antibody is 50 g / m1
- 1 ⁇ ⁇ 1: 3 antibody is 0.1 g / ml
- RNOK201 Using 3.57 / g / ml, 1.86 / gZml for RNOK 202, and 3.35 gZm1 for RNOK 203, dilute two-fold serially with PBS containing 1% BSA to prepare antibody solutions at eight different concentrations did.
- the solution containing the native Fas ligand, the solution containing the mutant Fas ligand, and the solution of the negative control prepared in Section 5-5) were placed on a 96-well Maxi Soap plate (trade name) in a 50-well column. It was added with a well. The positional relationship of the added columns is the same as in 5-4). After overnight incubation in step 4, each well was washed three times with 0.01 MPBS containing ⁇ .05% Tween 20, and PBS containing 1% BSA was added at 100/1 / well. After incubation at 37 ° C for 1 hour, each well was washed three times with 0.01MPBS containing 0.05% Tween 20.
- the NOK antibody and the humanized NOK2 antibody at the respective concentrations prepared by the method described in the preceding section were added at 50 ⁇ l / well to 8 columns. Subsequently, after incubation at 37 ° C for 2 hours, each well was washed three times with 0.01MPBS containing 0.05% Tween 20, and HRP-labeled anti-mouse Ig-C / antibody or HRP-labeled anti-human Ig- A C / 0 antibody (all manufactured by Southern Biotechnology ⁇ Associate (manufactured by Southern Biotechonlogy Associate)) diluted 500 fold with PBS containing 1% BSA was added at 500 1 / ⁇ .
- the relative binding strength of the NOK antibody and the humanized NOK2 antibody to each mutant Fas ligand was examined. That is, first, in order determine the specific color intensity for each Uweru native F the as ligands and mutant F the as ligand from 0 D 45 0 value of each Ueru addition of a negative control in the N 0 K antibody of the same concentration to calculate the value obtained by subtracting the 450 value ⁇ _D of Ueru that was added.
- Fig. 19 and Fig. 20 The relative binding powers of the NOK antibody and the humanized NOK2 antibody to each mutant Fs ligand calculated as described above are summarized in FIGS.
- Fig. 19 and Fig. 20 the range from Arg of No. 198 to Mer of No. 238 from the X-terminal side of the Fas ligand (amino acid numbers are described by Nagata et al. (Nagata et al., Int. Immunology) , vol. 6, pl 567—1574, 1994)), the g: lower binding of NOK2 antibody was observed (especially, Arg of 198, G of 199).
- a decrease in the binding is observed in the range from G1y at position 199 to G1n at position 237 (especially, Asn at position 199, Asn at position 203, and 205 Le u, 218 Tyr, 220 Gln, 221 Asp, 222 Leu, 227 Gly, 228 Lys and 237 G1n Remarkable decrease is observed).
- the NO K3 antibody showed reduced binding in the range from G 1 y at position 199 to the met at position 238 (especially, G ly at position 199, G ln at position 200, G n at position 200, As n at position 203). , 205 Leu, 212 Tyr, 220 Gln, 221 Asp, 222 Leu, 228 No. 5, 230 Met, 237 Gin And a marked decrease is observed at the site of the MET No. 238).
- the NOK antibody is a monoclonal antibody obtained by immunizing mice with Fas ligand-expressing cells (described in Example 1 of Japanese Patent Application No. 303492, 1995).
- the NOK antibody and the humanized NOK2 antibody are antibodies having strong inhibitory activity against apoptosis induced in Fas-expressing cells through the interaction of Fas-Fas ligand ( Examples 1 and 2 of WO 96/29350 and Example 4 of the present invention).
- the NOK antibody is the first anti-Fas ligand monoclonal antibody with high apoptosis-suppressing activity, obtained by immunizing with a native-structured Fas ligand.
- the amino acid sequences of the CDRs (complementarity determining regions) of these monoclonal antibodies differ from one another, and the classes and subclasses of the antibodies also differ, that is, they are completely independent antibodies.
- These completely different antibody recognition regions As described above, since it exists in a wide region formed by the amino acid sequence from the Arg at position 198 to the Met at position 238 of the Fas ligand, it has high anti-apoptotic activity. It can be said that an as-ligand antibody generally recognizes an amino acid contained in the above region as a recognition region.
- the above-mentioned region is a major region existing in the Fas ligand molecule and capable of eliciting an anti-Fas ligand antibody having high apoptosis inhibitory activity. Furthermore, the above region is an important region for the Fas ligand to exhibit apoptosis-inducing activity, suggesting that a substance capable of recognizing and binding to this region can exhibit apoptosis-suppressing activity.
- a 15-mer peptide from the N-terminus of the extracellular domain of the Fas ligand (G1n at position 103 from the N-terminus of the Fas ligand), a 15-mer peptide from No. 6 to No. 20, 1
- a peptide library was prepared by synthesizing 34 types of 15-mer peptides by shifting the 5-mer and the 5-mer; (Registered trademark, Chiron) was used.)
- the substrate solution having the following composition was dispensed into a new 96-well plate in a volume of 100 1-well, and the pins of the set-up were placed in each well of the plate, and reacted at room temperature for 20 minutes.
- the anti-Fas ligand antibodies produced by the hybridomas of NOK 1 and NOK4 recognize the LYFVYSKVYFRGQSCNNLPLSHKVY region of the Fs ligand, and the anti-Fas ligand antibodies produced by the hybridomas of NOK 2 are F As a result, it was recognized that the YPQDL VMMEGKMMS YCTTGQMWARS area of the recognition was recognized.
- Fas ligand trimer was constructed by computer-based molecular modeling using TNF-type ⁇ , and apoptosis inhibition confirmed from the results of binding experiments between the anti-Fas ligand antibody and the mutant Fas ligand molecule. We decided to consider where the region important for activity would be located on the Fas ligand molecule.
- PDB ID: 1 TNF is a data of the crystal structure of the trimer of TNF ⁇
- PDB ID: 1 TNR is because the data of the crystal structure of the complex of TNF and TNF receptor one 55, than each, TNF beta Only data for monomers and TNF / 3 monomers were cited.
- the conditions were set so that 10 models could be obtained, and modeling was performed.
- the model after the energy minimization calculation, the probability density function (PDF: Probability Density Function) and the root mean square (RMS) value of all atoms are low. Selected as model.
- a Fas ligand trimer was constructed based on the model of the Fas ligand monomer thus obtained.
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Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/254,180 US6777540B1 (en) | 1996-09-02 | 1997-08-27 | Humanized immunoglobulin reacting specifically with Fas ligand or active fragments thereof and region inducing apoptosis originating in Fas ligand |
AU40307/97A AU725329B2 (en) | 1996-09-02 | 1997-08-27 | Humanized immunoglobulin reacting specifically with Fas ligand or active fragments thereof and region inducing apoptosis originating in Fas ligand |
CA002264968A CA2264968A1 (en) | 1996-09-02 | 1997-08-27 | Humanized immunoglobulin reacting specifically with fas ligand or active fragments thereof and region inducing apoptosis originating in fas ligand |
EP97937807A EP0957166A4 (en) | 1996-09-02 | 1997-08-27 | HUMANIZED IMMUNOGLOBULIN SPECIFICALLY REACTING WITH A LIGAND Fas OR ONE OF ITS ACTIVE FRAGMENTS AND REGION FOR INDUCING APOPTOSIS BORN IN A LIGAND Fas |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8/231742 | 1996-09-02 | ||
JP23174296 | 1996-09-02 | ||
JP27154696 | 1996-09-20 | ||
JP8/271546 | 1996-09-20 |
Publications (1)
Publication Number | Publication Date |
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WO1998010070A1 true WO1998010070A1 (fr) | 1998-03-12 |
Family
ID=26530062
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Application Number | Title | Priority Date | Filing Date |
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PCT/JP1997/002983 WO1998010070A1 (fr) | 1996-09-02 | 1997-08-27 | IMMUNOGLOBULINE HUMANISEE REAGISSANT SPECIFIQUEMENT AVEC UN LIGAND Fas OU L'UN DE SES FRAGMENTS ACTIFS ET REGION D'INDUCTION D'APOPTOSE PRENANT NAISSANCE DANS UN LIGAND Fas |
Country Status (5)
Country | Link |
---|---|
US (1) | US6777540B1 (ja) |
EP (2) | EP0957166A4 (ja) |
AU (1) | AU725329B2 (ja) |
CA (1) | CA2264968A1 (ja) |
WO (1) | WO1998010070A1 (ja) |
Cited By (7)
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WO1999062554A1 (fr) * | 1998-05-29 | 1999-12-09 | Mochida Pharmaceutical Co., Ltd. | Preparations de prevention / de traitement de maladies demyelinisantes auto-immunes |
WO2008080623A2 (en) | 2006-12-28 | 2008-07-10 | Deutsches Krebsforschungszentrum Stiftung des öffentlichen Rechts | Neutralization of cd95 activity blocks invasion of glioblastoma cells in vivo |
WO2010066914A2 (en) | 2008-12-12 | 2010-06-17 | Pincell Srl | Remedies for pemphigus containing anti fas ligand antibodies |
US7767405B2 (en) * | 2002-12-17 | 2010-08-03 | Merck Patent Gmbh | Immunocytokine sequences and uses thereof |
JP2012031211A (ja) * | 2005-02-08 | 2012-02-16 | Chemo-Sero-Therapeutic Research Inst | 抗体の改良方法 |
JP2013505707A (ja) * | 2009-09-25 | 2013-02-21 | 上海抗体薬物国家工程研究中心有限公司 | コンピュータ支援設計により高親和性の抗体又はタンパク質分子を得る方法 |
EP3076179A1 (en) | 2015-03-30 | 2016-10-05 | Deutsches Krebsforschungszentrum Stiftung des Öffentlichen Rechts | Diagnosis and treatment of low grade gliomas |
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US7521053B2 (en) | 2001-10-11 | 2009-04-21 | Amgen Inc. | Angiopoietin-2 specific binding agents |
US7658924B2 (en) * | 2001-10-11 | 2010-02-09 | Amgen Inc. | Angiopoietin-2 specific binding agents |
US8022188B2 (en) * | 2006-04-24 | 2011-09-20 | Abbott Laboratories | Immunosuppressant binding antibodies and methods of obtaining and using same |
PT2231708E (pt) * | 2007-12-12 | 2015-07-30 | Pincell Srl | Remédios para pênfigo contendo anticorpos anti-ligando de faz |
JO2913B1 (en) | 2008-02-20 | 2015-09-15 | امجين إنك, | Antibodies directed towards angiopoietin-1 and angiopoietin-2 proteins and their uses |
CN101357942B (zh) * | 2008-05-30 | 2012-01-04 | 中国人民解放军第三军医大学 | 一种中和肠出血性大肠杆菌0157:H7志贺毒素Ⅱ的单克隆抗体、Fab抗体与应用 |
US8278065B2 (en) * | 2008-06-30 | 2012-10-02 | Morphotek, Inc. | Polynucleotides encoding anti-GD2 antibodies |
WO2010019565A2 (en) * | 2008-08-12 | 2010-02-18 | Medlmmune, Llc | Anti-ephrin b2 antibodies and their use in treatment of disease |
AU2016325482B2 (en) | 2015-09-23 | 2020-09-03 | Apogenix Ag | Anti-CD95L antibody |
GB202016058D0 (en) | 2020-10-09 | 2020-11-25 | Ucl Business Ltd | Therapeautic treatment |
Citations (1)
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JPS62296890A (ja) * | 1986-03-27 | 1987-12-24 | メディカル リサーチ カウンスル | 組換えdna生産物及び製造法 |
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IL162181A (en) * | 1988-12-28 | 2006-04-10 | Pdl Biopharma Inc | A method of producing humanized immunoglubulin, and polynucleotides encoding the same |
US5530101A (en) * | 1988-12-28 | 1996-06-25 | Protein Design Labs, Inc. | Humanized immunoglobulins |
JPH08127594A (ja) * | 1993-11-10 | 1996-05-21 | Mochida Pharmaceut Co Ltd | Fas抗原に結合する新規蛋白質およびそれをコードするDNA |
ATE387458T1 (de) | 1994-01-07 | 2008-03-15 | Mochida Pharm Co Ltd | Fas-antigenbindender ligand |
DE69636170T2 (de) * | 1995-03-20 | 2006-11-02 | Okumura, Ko | Monoklonaler antikörper, der spezifisch mit dem fas-liganden reagiert, und verfahren zu seiner herstellung |
US6114507A (en) * | 1995-06-30 | 2000-09-05 | Mochida Pharmaceutical Co., Ltd. | Anti-Fas ligand antibody and assay method using the anti-Fas ligand antibody |
AU724856B2 (en) | 1995-06-30 | 2000-10-05 | Mochida Pharmaceutical Co., Ltd. | Anti-Fas ligand antibody and assay method using the anti-Fas ligand antibody |
-
1997
- 1997-08-27 AU AU40307/97A patent/AU725329B2/en not_active Ceased
- 1997-08-27 EP EP97937807A patent/EP0957166A4/en not_active Withdrawn
- 1997-08-27 WO PCT/JP1997/002983 patent/WO1998010070A1/ja not_active Application Discontinuation
- 1997-08-27 US US09/254,180 patent/US6777540B1/en not_active Expired - Lifetime
- 1997-08-27 CA CA002264968A patent/CA2264968A1/en not_active Abandoned
- 1997-08-27 EP EP05023018A patent/EP1642908A2/en not_active Withdrawn
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JPS62296890A (ja) * | 1986-03-27 | 1987-12-24 | メディカル リサーチ カウンスル | 組換えdna生産物及び製造法 |
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Title |
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INT. IMMUNOL., Vol. 6, TAKAHASHI T. et al., "Human Fas Ligand: Gene Structure, Chromosomal Location and Species Specificity", pages 1567-1574. * |
J. EXP. MED., Vol. 182, (1995), KAYAGAKI N. et al., "Metalloproteinase-Mediated Release of Human Fas Ligand", pages 1777-1783. * |
MOLECULAR IMMUNOLOGY, Vol. 32, PEITSCH M.C. et al., "Comparative Molecular Modelling of the Fas-Ligand and Other Members of the TNF Family", pages 761-772. * |
See also references of EP0957166A4 * |
THE JAPANESE JOURNAL CLINICAL MEDICINE, Vol. 54, (1996), HIROSHI ASAHARA et al., "Fas in Rheumatoid Arthritis Synovial Tissues/Examination on the Manifestation of Fas Ligand System (in Japanese)", pages 1960-1964. * |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
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WO1999062554A1 (fr) * | 1998-05-29 | 1999-12-09 | Mochida Pharmaceutical Co., Ltd. | Preparations de prevention / de traitement de maladies demyelinisantes auto-immunes |
US6759041B1 (en) | 1998-05-29 | 2004-07-06 | Mochida Pharmaceutical Co., Ltd. | Preventives/remedies for autoimmune demyelinating diseases |
US7767405B2 (en) * | 2002-12-17 | 2010-08-03 | Merck Patent Gmbh | Immunocytokine sequences and uses thereof |
JP2012031211A (ja) * | 2005-02-08 | 2012-02-16 | Chemo-Sero-Therapeutic Research Inst | 抗体の改良方法 |
US9873730B2 (en) | 2005-02-08 | 2018-01-23 | The Chemo-Sero-Therapeutic Reserach Institute | Method for improving antibody |
US10487137B2 (en) | 2005-02-08 | 2019-11-26 | The Chemo-Sero-Therapeutic Research Institute | Method for improving antibody |
WO2008080623A2 (en) | 2006-12-28 | 2008-07-10 | Deutsches Krebsforschungszentrum Stiftung des öffentlichen Rechts | Neutralization of cd95 activity blocks invasion of glioblastoma cells in vivo |
EP2428252A1 (en) | 2006-12-28 | 2012-03-14 | Deutsches Krebsforschungszentrum Stiftung des Öffentlichen Rechts | Neutralization of CD95 activity blocks invasion of glioblastoma cells in vivo |
WO2010066914A2 (en) | 2008-12-12 | 2010-06-17 | Pincell Srl | Remedies for pemphigus containing anti fas ligand antibodies |
JP2013505707A (ja) * | 2009-09-25 | 2013-02-21 | 上海抗体薬物国家工程研究中心有限公司 | コンピュータ支援設計により高親和性の抗体又はタンパク質分子を得る方法 |
EP3076179A1 (en) | 2015-03-30 | 2016-10-05 | Deutsches Krebsforschungszentrum Stiftung des Öffentlichen Rechts | Diagnosis and treatment of low grade gliomas |
Also Published As
Publication number | Publication date |
---|---|
EP0957166A4 (en) | 2004-12-15 |
EP0957166A1 (en) | 1999-11-17 |
CA2264968A1 (en) | 1998-03-12 |
US6777540B1 (en) | 2004-08-17 |
AU4030797A (en) | 1998-03-26 |
EP1642908A2 (en) | 2006-04-05 |
AU725329B2 (en) | 2000-10-12 |
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