WO2007032255A1 - T細胞レセプター及び該レセプターをコードする核酸 - Google Patents
T細胞レセプター及び該レセプターをコードする核酸 Download PDFInfo
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- WO2007032255A1 WO2007032255A1 PCT/JP2006/317773 JP2006317773W WO2007032255A1 WO 2007032255 A1 WO2007032255 A1 WO 2007032255A1 JP 2006317773 W JP2006317773 W JP 2006317773W WO 2007032255 A1 WO2007032255 A1 WO 2007032255A1
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- A61K40/10—Cellular immunotherapy characterised by the cell type used
- A61K40/11—T-cells, e.g. tumour infiltrating lymphocytes [TIL] or regulatory T [Treg] cells; Lymphokine-activated killer [LAK] cells
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- A61K40/00—Cellular immunotherapy
- A61K40/30—Cellular immunotherapy characterised by the recombinant expression of specific molecules in the cells of the immune system
- A61K40/32—T-cell receptors [TCR]
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- A61K40/00—Cellular immunotherapy
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- A61K40/41—Vertebrate antigens
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- A61K40/4267—Cancer testis antigens, e.g. SSX, BAGE, GAGE or SAGE
- A61K40/4268—MAGE
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- 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
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Definitions
- T cell receptor and nucleic acid encoding the receptor
- the present invention relates to an HLA-A2402-restricted cell specific to MAGE-A4 peptide.
- TCR Vesicle receptor
- nucleic acid encoding the polypeptide, polypeptide constituting the TCR ⁇ -chain
- nucleic acid encoding the polypeptide, polypeptide constituting the a-chain and ⁇ ⁇ cell receptor composed of a polypeptide constituting a chain
- a recombinant nucleic acid comprising the nucleic acid
- a vector comprising the recombinant nucleic acid
- a cell into which the nucleic acid or vector has been introduced and the vector or cell
- the present invention relates to an anticancer agent comprising as an active ingredient.
- Cytotoxic cell is a major tissue compatible antigen molecule (MHC molecule) encoded by a major histocompatibility gene complex (hereinafter abbreviated as MHC).
- MHC tissue compatible antigen molecule
- HLA human leukocyte antigen
- TCR T cell receptor
- Such an antigen peptide is produced, for example, when an antigen synthesized in the cell of a mammalian cell is processed in the cytoplasm and decomposed into small peptides, and further combined with an HLA molecule, Presented to. That is, in the proteasome complex composed of many subunits, the protein is broken down into peptides of 8 to 15 amino acids, and some of them are transported to the cytoplasmic endoplasmic reticulum by the TAP transporter. If these peptides are able to bind to class IZ j82 microglobulin heterodimers in the endoplasmic reticulum, they are stabilized as trimolecular complexes and transported to the cell surface through the Golgi apparatus. It is. Tumor cells expressing tumor-associated antigens or tumor-specific antigen proteins should be able to present on the cell surface HLA-restricted antigenic peptides that are recognized by T cells.
- HLA class I molecules mainly include HLA-A, 1B, 1C, and the antigen peptides presented by binding to these consist of 8 to 10 amino acids, and also differ depending on each HLA molecule. It is known that there are certain structural features. For example, the world's most common HLA-A2. Peptide that binds to one molecule is a peptide consisting of 9-10 amino acids having Leu second from the N-terminus and Leu or Val at the C-terminus. It is the best known.
- the peptide that binds to the HLA-A24 molecule which is common in Asians, including Japanese, is Tyr, Phe, Met, or Trp second from the N-terminus, and Leu, Ile, or Trp at the C-terminus.
- Peptides consisting of 9 to 10 amino acids having any of Phe are best known.
- Tumor antigens that have been identified to date include MAGE-Al, MAGE-A3, MAGE-A4, HLA-A2.1 for MAGE-A3, MARTI, tyrosinase, gplOO for HLA-A1 , HER2Zneu, CEA, etc., MAGE—A3 for HLA—Cwl, MAGE—A3 for HLA—B44, MAGE—A4 for HLA—B37, MAGE—Al, MAGE—A2, MAGE—A3, MAGE—A4, NY—ESO-1, CEA, HER2 / neu, tyrosinase, j8—catenin, etc.
- HLA class I molecules can be classified into several subtypes.
- the types of possessed subtypes vary greatly among races, and globally, HLA-A2 is the most white 4 5% are 13 ⁇ 4 ⁇ -8 positive.
- Identification of this HLA-A2-restricted antigenic peptide Is the most advanced. In Japan, HLA-A2 positivity accounts for 40%. Looking at its subtypes, HLA-A * 0201 positivity is 20%, which is the same as that of white race, and the rest are A * 0206 positivity.
- the peptides that bind to these subtypes are different, and HL 8-8, which is mainly studied, is 13 ⁇ 4 ⁇ ⁇ -8 * 0201.
- HLA-A24 positivity accounts for 60% or more in Japanese, and the HLA-A24 positivity rate is higher in Asian races than in other races. Therefore, the discovery of HLA-A24-restricted antigenic peptides plays an important role in the provision of CTLs useful for tumor therapy by inducing CTLs that act specifically on tumor cells in Asians, particularly Japanese. Indicates.
- Tumor antigen-specific TCR genes include, for example, HLA-A2-restricted MART1-specific TCR [Non-Patent Document 1], MAGE-A3-specific TCR [Non-Patent Document 2], CAMEL (CT L recognized antigen on melanoma) -specific TCR [Non-patent document 3], gp100-specific TCR [Non-patent document 4], NY—ESO-1 specific TCR [Non-patent document 5], HLA—24-restricted WT1 (Wilms tumor 1 ) Genes such as specific TCR [Non-patent document 6] and HLA-Cwl6-restricted MAGE-A1-specific TCR [Non-patent document 7] have been cloned.
- TCR gene targeting MART1 [Non-patent document 8], gplOO [Non-patent document 4] and mHAG HA-2 antigen [Non-patent document 9] Attempts have been made to gene therapy by children.
- MAGE—A4 is an antigen belonging to the MAGE subfamily of the cancer testis antigen family. It is expressed in various cancers and is highly antigenic (60 of esophageal cancer). %, Positive in 50% of head and neck cancers, 24% of non-small cell lung cancers, 33% of gastric cancers and 21% of Hodgkin's disease), it is promising as a target antigen for cancer vaccine therapy. HLA-A24-restricted MAGE-A4 peptide-specific CTL clone was obtained
- Non-Patent Document 1 Cancer Research, 54th, 5265-5268 (1994)
- Non-Patent Document 2 Anticancer Res., 20th, 1793 — 1799 (2000)
- Non-Patent Document 3 International Journal of Cancer, Int. J. Cancer, 99th, 7-13 (2002)
- Non-Patent Document 4 Journal of Immunology, (J. Immunol.) No. 170, 218 6–2194 (2003)
- Non-Patent Document 5 Journal of Immunology, 174th, 4415–4423 (200 5)
- Non-Patent Document 6 Blood, pp. 106, 470-476 (2005)
- Non-Patent Document 7 International Immunology (Int. Immunol.), VIII, 146
- Non-Patent Document 8 Journal of Immunology, 163rd pp. 507-513 (1999)
- Non-Patent Document 9 Blood, 103rd pp. 3530-3540 (2003)
- Non-Patent Document 10 Clin. Cancer Res. 11th, 5581-5589 (2005)
- the HLA-A24-restricted TCR gene for tumor-associated antigens is known to have a strength against WT1, but its analysis is still delayed compared to HLA-A2.1. It is impossible to provide a TCR gene that is useful for tumor treatment in Gia, especially Japanese. Therefore, discovery of a new TCR gene restricted to HLA-A24 against various tumor antigens is desired.
- the present inventors clone cDNA encoding TCR a chain and j8 chain from HLA-A24 restricted CTL against tumor antigen MAGE-A4. Succeeded. Furthermore, by introducing RNA prepared from these cDNAs into cells such as CTLs that express HLA-A24 molecules, these cells have cytotoxicity specific to HLA-A24-restricted MAGE-A4-derived peptides. The present invention has been completed.
- the first aspect of the present invention is an HLA-A24-restricted MAGE-A4-specific T cell.
- the present invention relates to a polypeptide constituting a cell receptor and a polypeptide having a polypeptide of the variable region of the receptor.
- a second aspect of the present invention relates to an HLA-A24-restricted, MAGE-A4-specific TCR characterized by comprising the polypeptide of the first aspect of the present invention.
- a third aspect of the present invention is the HLA-A24-restricted MAGE-A4-specific TC.
- the present invention relates to a nucleic acid encoding R, and a nucleic acid encoding a polypeptide having the polypeptide of the variable region of the receptor.
- a fourth aspect of the present invention relates to a recombinant nucleic acid comprising the nucleic acid of the third aspect of the present invention.
- a fifth aspect of the present invention relates to a vector into which the recombinant nucleic acid according to the fourth aspect of the present invention has been inserted.
- a sixth aspect of the present invention is characterized in that the nucleic acid according to the third aspect of the present invention is introduced or transformed with the vector according to the fifth aspect.
- Restricted MA GE-A4 relates to cells expressing TCR specific.
- a seventh aspect of the present invention relates to an anticancer agent, comprising the cell of the sixth aspect of the present invention or the vector of the fifth aspect as an active ingredient.
- An eighth aspect of the present invention relates to a method for treating cancer, comprising the step of administering the anticancer agent of the seventh aspect of the present invention.
- HLA-A24-restricted MAGE-A4-specific TCR ⁇ -chain and
- Tumors that use T cells as effector cells that are not HLA-A24-restricted or have MAGE-A4 specificity are not HLA-A24-restricted or have MAGE-A4 specificity
- Cytotoxic methods are provided.
- the above effector cells are useful, for example, in the treatment of cancer.
- the first aspect of the present invention is an HLA-A24-restricted, MAGE-A4-specific T cell.
- the present invention relates to a polypeptide constituting a vesicle receptor having a polypeptide of a variable region of the receptor.
- a polypeptide constituting a vesicle receptor having a polypeptide of a variable region of the receptor.
- TCR a chain and TCR ⁇ chain. These chains are combined to form HLA- H24-restricted MAGE- ⁇ 4 specific
- the ⁇ chain polypeptide, together with the j8 chain, is HLA— ⁇ 24-restricted MAGE— ⁇ 4
- the polypeptide derived from the ⁇ chain of TCR in the present invention contains the amino acid sequence of the ⁇ chain variable region or a sequence similar thereto as an essential component.
- amino acid sequence of the entire a chain containing the constant region (SEQ ID NO: 1) or a similar sequence, that is, a polymorphic amino acid sequence having deletion, addition, insertion or substitution of one to several amino acid residues.
- a peptide is one of the preferred embodiments of the present invention.
- the ⁇ chain polypeptide is HLA-A24-restricted MAGE-A4 together with the a chain.
- TCR 14 It can form a specific TCR, and as a 13-chain variable region polypeptide,
- the polypeptide derived from the ⁇ chain of TCR in the present invention contains the amino acid sequence of the ⁇ chain variable region or a sequence similar thereto as an essential component.
- the polypeptide is one of the preferred embodiments of the present invention.
- HLA-A24-restricted MAGE-A4-specific TCR is a sequence listing.
- the T cell is HLA-A24 restricted P 14 3 specific to the target cell It can impart a specific cytotoxic activity.
- Specific methods for confirming specific recognition of the complex include known tetramer analysis and ELISPOT assay using, for example, HLA-A24 molecule and P143. By performing ELISP OT assembly, it is possible to confirm that T cells expressing the TCR on the cell surface recognize the target cell by TCR and that the signal is transmitted into the cell.
- cytotoxicity can be imparted to the T cell when the complex is present on the surface of the T cell.
- HLA-A24 such as chromium release assay. Measurement of cytotoxic activity against positive target cells can be mentioned.
- the polypeptide of the present invention can be produced by genetic engineering using the nucleic acid of the present invention described later. For example, by introducing both the nucleic acid encoding the ⁇ chain polypeptide and the nucleic acid encoding the j8 chain polypeptide into a cell and expressing the ⁇ chain and j8 chain polypeptide, HLA-A24 Restraint, MAGE—A4 specific TCR
- a second aspect of the present invention relates to an HLA-A24-restricted, MAGE-A4-specific TCR characterized by being constituted by the polypeptide of the present invention.
- R is not particularly limited to the present invention, but for example, by using the nucleic acid of the present invention described later to artificially express the polypeptide encoded by the nucleic acid, it is naturally attached. Thus, it can be prepared in a form separated from the biological component.
- a third aspect of the present invention is the HLA-A24-restricted, MAGE-A4-specific TC.
- It relates to a nucleic acid encoding R or a variable region thereof.
- the nucleic acid of the present invention is a nucleic acid encoding a polypeptide having a TCR a chain variable region polypeptide or a nucleic acid encoding a polypeptide having a TCR ⁇ chain variable region polypeptide, each of which has a TCR ⁇ HLA—A24ZMAGE—A4 when introduced into a cell with a nucleic acid encoding a chain polypeptide or a nucleic acid encoding a TCR a chain polypeptide
- the nucleic acid encoding a polypeptide having a TCR a chain variable region polypeptide includes a nucleic acid encoding a TCR a chain polypeptide, TCR o; a nucleic acid ability encoding a chain variable region polypeptide, TCR ⁇ chain variable region polypeptide
- the nucleic acid encoding the ⁇ -chain polypeptide includes a nucleic acid consisting of the base sequence shown in SEQ ID NO: 3 in the sequence listing, a nucleic acid of the base sequence or a complementary strand thereof. And nucleic acids that can hybridize under stringent conditions.
- the nucleic acid encoding the variable region of the ⁇ -chain polypeptide includes a nucleic acid having a base sequence ability shown in SEQ ID NO: 6 in the sequence listing, and a nucleic acid that can hybridize with a nucleic acid of the base sequence or a complementary chain thereof under stringent conditions. Is exemplified.
- the nucleic acid encoding the j8-chain polypeptide includes a nucleic acid consisting of the base sequence shown in SEQ ID NO: 4 in the sequence listing, and a stringent condition with the nucleic acid of the base sequence or its complementary strand. Examples of nucleic acids that can be hybridized are given below.
- the nucleic acid encoding the variable region of the ⁇ -chain polypeptide is hybridized under stringent conditions with the nucleic acid consisting of the base sequence shown in SEQ ID NO: 8 in the Sequence Listing, as well as the nucleic acid of the base sequence or its complementary strand. Possible nucleic acids are exemplified.
- stringent conditions are as follows: 1989, Cold 'Spring' Nova 1 'Laboratories, edited by J. Sambrook et al. The conditions described in Laboratory 'M-Yuanore 2nd Edition (Molecular Cloning: A Laboratory Manual 2nd ed.) Etc. are exemplified. Specifically, for example, in 6 X SSC containing 0.5% SDS, 5X Denharz solution, 0.01% denatured salmon sperm DNA, conditions for incubation with a probe at 65 ° C for 12-20 hours Can be mentioned. Nucleic acid hybridized to the probe can be detected after removing non-specifically bound probe by washing at 37 ° C in 0.1 X SSC containing 0.5% SDS, for example.
- the nucleic acid in the present specification means single-stranded or double-stranded DNA, RNA, or DNA-RNA chimera, or DNA-RNA heteroduplex.
- RNA DNA
- T in the sequence listing described in this specification is read as U for the sequence of the RNA portion.
- a nucleic acid encoding a TCR a chain polypeptide of the present invention or a nucleic acid encoding a TCR a chain variable region polypeptide, a nucleic acid encoding a TCR ⁇ chain polypeptide, or a TCR ⁇ chain variable A combination of two nucleic acids of a nucleic acid encoding a region polypeptide is exemplified. The combination of nucleic acids described above produces an HLA-A24-restricted, MAGE-A4-specific TCR in cells.
- the nucleic acid of the present invention can be obtained, for example, as follows.
- HLA A24-restricted AGEAGE—A4-specific CTL, for example clone # 2— 28
- RNA by conventional methods and synthesize cDNA.
- 5'-rabbit amplification of cDNA end (RACE) is performed using an antisense primer complementary to the nucleic acid encoding the constant region of TCR o; and ⁇ strands.
- 5′-RACE can be performed by a known method, for example, using a commercially available kit such as CapFishing Full-length cDNA Premix Kit (manufactured by Sea Gene). Said method The DNA amplified by is incorporated into a plasmid vector, and E. coli is transformed. A plasmid is prepared from the transformant strength, and the nucleotide sequence of the inserted DNA is determined.
- [0035] Exclude DNA unrelated to the TCR gene amplified by 5'—RACE by comparing the obtained nucleotide sequence with the sequences of known TCR a chain and / 3 chain genes. Is possible. Further, since DNA having a mutation in the base sequence may be amplified during PCR, in the present invention, a plurality of E. coli clones are also sequenced, and the CTL estimated by the consensus sequence is determined. It is preferable to use the sequences of the TCR a chain gene and ⁇ chain gene that are originally present.
- a nucleic acid encoding the aCR a chain of the amino acid sequence of SEQ ID NO: 1 having the base sequence shown by SEQ ID NO: 3 in the sequence listing, and a sequence having the base sequence shown by SEQ ID NO: 4 in the sequence listing
- 8 chain of the amino acid sequence of No. 2 was obtained by the above method.
- the DNA obtained by the above method may be used, or a nucleic acid having the same sequence may be chemically synthesized and used.
- a nucleic acid encoding a portion corresponding to the variable region of each chain constituting TCR is a constant among other functional molecules such as nucleic acids encoding antibodies and receptors. It can be connected to a region or a region encoding an intracellular region.
- the new nucleic acid constructed in this way gives HLA-A24-restricted MAGE-A4-specific binding activity.
- a fourth aspect of the present invention is a recombinant nucleic acid comprising the nucleic acid of the present invention.
- the recombinant nucleic acid is not particularly limited to the present invention, but includes various elements encoded by the nucleic acid that enable translation of the polypeptide when the nucleic acid of the present invention is introduced into a cell.
- the added nucleic acid is exemplified.
- Recombinant nucleic acids of the present invention comprising DNA include promoters (eg, phosphodareric phosphate kinase promoter, Xist promoter, j8-actin promoter, RNA polymerase II promoter and other mammalian promoters, SV40 early promoter, site Virus promoters such as megalovirus promoters, simple herpesvirus thymidine kinase promoters, LTR promoters of various retroviruses, Examples include those having a transcription control region such as a terminator, Jenno, sensor. Furthermore, it may encode a sequence (Kozak sequence or the like) that contributes to translation of the polypeptide of the first invention.
- promoters eg, phosphodareric phosphate kinase promoter, Xist promoter, j8-actin promoter, RNA polymerase II promoter and other mammalian promoters, SV40 early promoter, site Virus promoters such as mega
- the above-described elements are arranged at functionally linked positions so as to be suitable for transcription of RNA from the nucleic acid of the present invention and translation of polypeptides.
- the recombinant nucleic acid is RNA, elements relating to transcription control are not necessary.
- the recombinant nucleic acid of the present invention can be used by being incorporated into a vector as described later, or can be used for expression of TCR by directly introducing the nucleic acid of the present invention, which is RNA, into a cell.
- a method for introducing RNA a known method may be used. For example, electroporation can be preferably used.
- a fifth aspect of the present invention relates to a vector into which at least one recombinant nucleic acid of the present invention has been inserted.
- the above-described vector is useful for expressing a desired cell in a MCR-A4-specific TCR that is HLA-A24-restricted.
- (1 + ( 1 + ( 1 + ( 1 + ( 1 + ( 1 + ( 1 + ( 1 + ( 1 + ( 1 + ( 1 + (a) of the present invention is useful for expressing a desired cell in a MCR-A4-specific TCR that is HLA-A24-restricted.
- a recombinant nucleic acid containing a nucleic acid encoding a TCR a chain polypeptide of the present invention or a polypeptide having a variable region polypeptide thereof and a TCR ⁇ chain polypeptide of the present invention or a polypeptide having the variable region polypeptide A vector into which both recombinant nucleic acids containing a nucleic acid encoding a peptide are inserted, and (2) a nucleic acid encoding a polypeptide having the TCR o; chain polypeptide or its variable region polypeptide of the present invention.
- the nucleic acid encoding the TCR a chain polypeptide and the nucleic acid encoding the TCR ⁇ chain polypeptide are each an internal ribosome entry site (I RES) can be transcribed and translated by a single promoter.
- I RES internal ribosome entry site
- the vector used in the present invention is not particularly limited, and a suitable vector may be selected from known vectors such as a plasmid vector and a virus vector according to the purpose.
- a suitable vector may be selected from known vectors such as a plasmid vector and a virus vector according to the purpose.
- gene introduction methods such as the calcium phosphate method, the cationic lipid method, the ribosome method, and the electoporation method can be used for introduction into cells.
- Viral vectors having the ability to infect cells and introduce foreign DNA are suitable for the present invention.
- virus vectors such as retrovirus vectors (including lentivirus vectors and pseudotype vectors), adenovirus vectors, adeno-associated virus vectors, and herpes virus vectors can be used.
- the viral vector into which the recombinant nucleic acid of the present invention has been inserted can infect a target cell under conditions suitable for each virus and can introduce the nucleic acid of the present invention.
- a retroviral vector having the ability to incorporate an inserted foreign nucleic acid onto a chromosome is suitable for the present invention.
- a sixth aspect of the present invention relates to a cell expressing an HLA-A24-restricted MAGE-A4-specific TCR, wherein the nucleic acid of the present invention is introduced.
- a preferred embodiment of the cell of the present invention that may be introduced into the desired cell as the above-described recombinant nucleic acid of the present invention or the vector of the present invention is a nucleic acid of the present invention. Transformation with a cell in which both a nucleic acid encoding a polypeptide having a variable region polypeptide and a nucleic acid encoding a TCR ⁇ -chain polypeptide or a polypeptide having the variable region polypeptide are introduced and the vector of the present invention
- the cells that are being exemplified are illustrated.
- a cell in which the above-mentioned nucleic acid is integrated on chromosomal DNA is also encompassed by the present invention.
- a preferred embodiment of the present invention is a sputum cell into which the nucleic acid of the present invention has been introduced.
- the nucleic acid may be introduced into a cell that can be separated into T cells, and then the cells may be separated into T cells.
- Examples of cells that can differentiate into T cells include hematopoietic stem cells, lymphocyte common progenitor cells, and ⁇ cell progenitor cells.
- the introduction target cells into which the nucleic acid is introduced can be fractionated into a single cell type! /, And the cell population containing the introduction target cells is not necessarily required.
- the cell population containing the cells to be introduced may be collected from peripheral blood, bone marrow and umbilical cord blood such as human or non-human mammals. If necessary, T cells and cells that can be differentiated into Z or T cells can be fractionated or enriched and used in the present invention. Book When the TCR gene-introduced cell of the invention is used for the treatment of cancer or the like, it is preferable to collect the cell population of the patient who is the subject of treatment or a donor force that matches the HLA type of the patient.
- a known method without particular limitation can be used for introducing the nucleic acid of the present invention into a cell.
- a method using an electoporation method for example, a method using an electoporation method, a calcium phosphate method, a cationic lipid method, or a ribosome method can be used.
- transfection reagents eg, Transl T series (Mirras), Genejuice (Novagen), Ribojuice (Novagen), Lipofectamine (Invitrogen)
- An acid can be introduced.
- the vector of the present invention when used, if the vector is a plasmid vector, it can be introduced into cells by the same method as that for the nucleic acid.
- the vector if the vector is a virus vector, an infection method suitable for each virus vector may be selected.
- retroviral vectors CH-296 (manufactured by Takarabio Co., Ltd.)
- a thread-replaceable fibronectin fragment reduces the infection efficiency of various cells, particularly retroviral vectors. In contrast, highly efficient gene transfer is possible.
- a seventh aspect of the present invention relates to an anticancer agent, comprising the vector of the fifth aspect of the present invention or the cell of the sixth aspect as an active ingredient.
- the T cell introduced with the nucleic acid of the present invention obtained by the sixth aspect of the present invention exhibits cytotoxic activity against cells presenting HLA-A24 molecule and MAGE-A4 peptide. Therefore, the above
- the vectors and cells of the present invention can be used as anticancer agents against cancers that express MAGE-A4.
- the anticancer agent of the present invention includes the vector or cell of the present invention as an active ingredient.
- the anticancer agent is provided in the form of the vector or cells suspended in a pharmaceutically acceptable diluent.
- the diluent referred to here is, for example, a medium, physiological saline, or phosphate buffered physiological saline suitable for storage of the vector or cells.
- the medium is not particularly limited, and generally includes a medium such as RPMI, AIM-V, X-VIVO 10 or the like.
- the anticancer agent includes a pharmaceutically acceptable carrier, A preservative or the like may be added for the purpose of stabilization.
- the carrier referred to here is human serum albumin or the like.
- the anticancer agent containing the cell of the present invention as an active ingredient is preferably 1 ⁇ 10 4 to 1 ⁇ 10 8 cells / mL, more preferably 5 ⁇ 10 5 to 5 ⁇ 10 7 cells / m. L is contained.
- the anticancer agent containing the cell of the present invention as an active ingredient is administered to a human, it can be administered, for example, with a syringe.
- the dose per adult is usually as described above.
- the number of cells is preferably 1 ⁇ 10 6 to 1 ⁇ 10 1 (> . Note that the above value is only a guideline and is not limited to this.
- the vector concentration and dosage in the anticancer drug vary greatly depending on the route of administration and the type of vector.
- the present invention provides a method for treating cancer.
- the therapeutic method is in vivo gene therapy when the vector of the fifth aspect of the present invention is used as an active ingredient.
- the cell of the present invention when used as an active ingredient, a nucleic acid encoding an HLA-A24-restricted, MAGE-A4-specific TCR for cells removed from the body.
- an administered individual eg, human
- cells derived from an individual having the same HLA type toxicity is not particularly observed.
- Non-Patent Document 10 SEQ ID NO: 9 in the sequence listing, below
- Target cells pulsed with P143 are cultured on HLA-A2402-restricted CTL clone # 2—28 cells and cultured from 2 ⁇ 10 5 cells to RNeasy Mini Kit (Qiagen) ) Was used to extract RNA.
- RNA RNA in a bowl shape
- using a CapFishing Full-length cDNA Premix Kit (Chigene) CDNA was synthesized according to the instruction manual.
- a reverse transcription reaction was performed using the oligo dT adapter shown in SEQ ID NO: 10 in the sequence listing, Reverse Transcriptase M-MLV (RNaseH free) (manufactured by Takara noio) and the reaction buffer attached to the enzyme. .
- 96 plasmids were selected from each of the transformants derived from PCR- ⁇ and PCR- ⁇ 2 thus obtained, and plasmids were prepared from each of the transformants.
- DN sequence was determined using an automatic sequencer. When clustering was performed after removing the sequence of pT7blue, the sequence of the longest open reading frame included in the consensus sequence of the largest container was as shown in SEQ ID NO: 3 and SEQ ID NO: 4 in the sequence listing. Met. These sequences are in turn the cDNA sequences of the TCR a chain gene and ⁇ chain gene of # 2-28 cells.
- TCR a chain and / 3 chain deduced from the cDNA base sequence are shown in SEQ ID NO: 1 and SEQ ID NO: 2 in the sequence listing.
- plasmids having the consensus sequences of TCR a chain gene and ⁇ chain gene cDNA in the same direction as the pT7blue ⁇ ⁇ ⁇ ⁇ ⁇ 7 promoter were selected and named pBS MAGE TCR ⁇ and pBS MAGE TCR j8, respectively.
- PBS MAGE TCR a and pBS MAGE TCR j8 were linearized by digestion with the restriction enzyme EcoRI. Using these as a saddle, in vitro transcription was performed using mMESSAGE mMACHINE T7 Kit (Ambion) according to the instruction manual of the kit. After that, using the Poly (A) Tailing Kit (Ambion), the transcribed RNA was attached to the transcribed RNA according to the instruction manual of the kit. Thus, MAGE-A4 TCR a mRNA and MAGE-A4 TCR jS mRNA were obtained. These were dissolved in phosphate buffered saline (PBS) and stored at ⁇ 80 ° C. until use.
- PBS phosphate buffered saline
- ms69 cells are CTL clones that show cytotoxic activity in a restricted manner on HLA-A2402 to target cells pulsed with SAGE715-723 peptide (SEQ ID NO: 15 in the sequence listing, hereinafter abbreviated as P715). It is a clone different from # 22 obtained by the same method as # 22 cells. 1 ⁇ 10 7 ms69 cells were washed twice with X—VIVO20 medium (Camprex).
- Example 2 80 g of each of MAGE-A4 TCR a mRNA and MAGE-A4 TCR jS mRNA prepared in (1) and the above cells were mixed in X-VIVO20 medium so as to be 150 L, and the ECM830 gene RNA was introduced into the cells by electroporation using an introduction device (BTX). Cells after introduction of mRNA were cultured in X-VIVO20 medium at 37 ° C for 1 day in the presence of 5% CO. Hereafter, the cells thus obtained are
- PBMC Peripheral blood mononuclear cells
- MAGE-A4 TCR a mRNA and MAGE-A4 TCR jS mRNA were introduced into this Itoda vesicle in the same manner as for ms69 cells.
- RNA-introduced CD8-positive cells Cultured on day.
- the cells thus obtained are referred to as RNA-introduced CD8-positive cells.
- HLA-A2402 heavy chain C-terminal polypeptide with sequence added as a substrate for piotin protein ligase BirA and j82-microglobulin were expressed in E. coli as insoluble inclusion bodies. The inclusion bodies were refolded in vitro in the presence of P143 peptide to form HLA-A2402 / j82-microglobulin / P143 complex. Piotin protein ligase (Avidity) was allowed to act on the resulting complex, and tetramer was prepared using phycoerythrin-labeled streptavidin (Streptavidin-PE, manufactured by Invitrogen).
- RNA-introduced ms69 cells and RNA-introduced CD8-positive cells were reacted with 20 ⁇ g ZmL tetramer at 37 ° C for 30 minutes, and then reacted with Tricolor-labeled mouse anti-human CD8 antibody (manufactured by Caltag) for 15 minutes on ice. It was. After washing the cells, flow cytometry analysis was performed using FACS Calibur (BD). ms69 cells and CD8 positive cells were used as negative subjects, and # 2-28 cells were used as positive subjects.
- the tetramer positive rate was 0.660% in the negative-introduced ms69 cell compared to 66.65% in the RNA-introduced ms69 cell, and 23 in the negative control CD8-positive cell. It was 34.4% for RNA-introduced CD8-positive cells compared to 1%.
- Fig. 1 and Fig. 2 show the results of tetramer assembly of ms69 cells and CD8 positive cells into which RNA was introduced. From this result, it was revealed that the gene products of TCR a chain and TCR ⁇ chain cloned from # 2-28 cells recognize the complex of P143 and HLA- ⁇ 2402.
- ELISPOT Target cells were prepared as follows.
- T2 (hereinafter abbreviated as ⁇ 2 cells) ⁇ ⁇ ⁇ ⁇ 2— ⁇ 2 4 cells (Ikuta Y. et al., Blood, 99 ⁇ , 3717) — Page 3724 (2002) was cultured in RPMI1640 medium containing 10% urine fetal serum (FCS), and the supernatant was discarded after centrifugation. The cells were then washed by suspending in RPMI 1640 medium and centrifuging and discarding the supernatant. After washing the cells three times in this manner, the cells were suspended in 1 mL of 10 / z M P143 or P715-containing or peptide-free RPMI1640 medium, and 3% in the presence of 5% CO.
- the cells were collected by centrifugation, suspended in RPMI1640 medium, and then centrifuged to wash the cells.
- the cells were suspended in RPMI1640 medium so that 5 ⁇ 10 4 cells were 100 ⁇ L, and used as target cells for ELISPOT assembly.
- Multi-screen ⁇ 96-well filtration and anti-human interferon ⁇ antibody (1-D 1 ⁇ , manufactured by Mabtech) diluted with PBS to 2 ⁇ gZmL for each well of Atwell plate (Millipore) was dispensed in 100 L aliquots and allowed to stand at 4 ° C for 1 kg. After discarding the solution in the well, 100 L of RPMI1640 medium was added to each well, and the plate was washed by discarding the solution for 15 minutes. After further washing once, RPMI1640 medium containing 10% AB type serum was placed in each well and allowed to stand at 37 ° C for 1 hour for blocking. After blocking, the supernatant was aspirated and 100 ⁇ L of RPMI1640 medium was added to each well to wash the plate. This washing operation was performed three times in total.
- Example 2 (a) RNA-introduced ms69 cells prepared in (2), (b) Negative control ms69 cells, and (c) Positive target # 2-28 cells and Example 2- (2)
- the (d) RNA-introduced CD8-positive cells and the (e) negative control CD8-positive cells prepared in (1) were collected by centrifugation and washed once with RPMI1640 medium.
- (A), (b) and (c) are 2000, 1000 or 500 Z100, (d) and (e) are suspended in RPMI1640 medium so that 2 x 10 4 Z100 ⁇ L. It became turbid and dispensed 100 L at a time to the wells of the washed plate prepared in Example 2- (4). To this, add 100 L of the above target cell suspension and grow at 37 ° C for 20 hours in the presence of 5% CO.
- Figure 3 shows the results of ELISPOT assembly when CTL clone is used as effector cells.
- Ms 69 cells are the target cells pulsed with P715, and # 2-28 cells are the target cells pulsed with 1 3 143.
- RNA introduced ms69 cells also to form a number of interferon ⁇ positive spots relative to target cells of deviation.
- Figure 4 shows the results of ELISPOT assembly when CD8 positive cells were used as effector cells. RNA-introduced CD8 positive cells specifically formed interferon gamma positive spots on target cells pulsed with 143.
- ms69 cells, RNA introduced ms69 cells, # 2-28 cells, CD8 positive cells and RNA introduced CD8 cells were washed twice with RPMI1640 medium, 2 106 111 Re 1 106 111 Le 5 X 10 5 cells ZmL, 2. 5 X 10 5 cells ZmL, 1. 25 X 10 5 cells ZML and, 6
- the suspension was suspended in 10% FCS-containing RPMI1640 medium (effector cells) at 25 ⁇ 10 4 ZmL, and 100 ⁇ L thereof was placed in a well of a 96-well V-bottom plate.
- Target cells were suspended in RPMI1640 medium containing 10% FCS so that the concentration was 1 ⁇ 10 6 ZmL, and 100 ⁇ L was added to each well containing effector cells. After reacting at 37 ° C for 4 hours, the supernatant was collected by centrifugation, and the amount of 51 Cr released in 100 ⁇ L supernatant was measured using a gamma counter. Specific cytotoxic activity was calculated from the measured radioactivity by the following formula.
- the minimum release value is the 51 Cr release amount in the well where no effector cells are added, and indicates the natural release amount of 51 Cr having the target cell strength.
- the maximum release value indicates the amount of 51 Cr released when Triton X-100 is added to target cells and destroyed.
- FIG. 5 shows the cytotoxic activity of the CTL clone against T2-A24 cells pulsed with P715 (a), T2-A24 cells pulsed with P143 (b), and T2-A2 cells pulsed with P143 (c).
- the horizontal axis represents the effector cell number Z target cell number ratio (EZT ratio), and the vertical axis represents specific cytotoxic activity (%).
- ms69 cells showed only cytotoxic activity on T71-A24 cells pulsed with P71 5, while # 2-28 cells showed cytotoxic activity only on D2-2-824 cells pulsed with 1 3 143, whereas RNA was introduced The ms69 cells showed cytotoxic activity against both target cells.
- FIG. 6 shows CD8 cells versus T143 cells pulsed with P143 (a), peptide-pulsed! /, NA! /, T2-A24 cells (b) and T2-A24 cells (c) pulsed with P143. It is a figure which shows a cytotoxic activity, a horizontal axis
- HLA-A24-restricted CTL-derived TCR a-chain and j8-chain polypeptides against MAGE-A4 and nucleic acids encoding the polypeptides are provided. These nucleic acids are directed against cells presenting HLA-A24 molecules and MAGE-A4 peptides.
- FIG. 1 is a diagram showing the results of tetramer assembly of # 2-28 cells, RNA-introduced ms69 cells and ms69 cells.
- FIG. 2 shows the results of tetramers of # 2-28 cells, RNA-introduced CD8-positive cells and CD8-positive cells.
- FIG. 3 shows the results of ELISPOT assay for # 2-28 cells, RNA-introduced ms69 cells and ms69 cells.
- FIG. 4 shows the results of ELISPOT assay for RNA-introduced CD8-positive cells and CD8-positive cells.
- FIG. 5 is a graph showing the cytotoxic activity of # 2-28 cells, RNA-introduced ms69 cells and ms69 cells.
- FIG. 6 is a graph showing the cytotoxic activity of # 2-28 cells, RNA-introduced CD8-positive cells and CD8-positive cells.
- SEQ ID NO: ll 5'—RACE primer.
- Synthetic primer 3 TRbeta— C2 to amplify a DNA fragment encoding TCR beta chain.
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US13/167,414 US8383401B2 (en) | 2005-09-13 | 2011-06-23 | T-cell receptor and nucleic acid encoding the receptor |
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Also Published As
Publication number | Publication date |
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CN101287831B (zh) | 2013-05-15 |
JP2013126415A (ja) | 2013-06-27 |
US8003770B2 (en) | 2011-08-23 |
JP5276846B2 (ja) | 2013-08-28 |
US20090324566A1 (en) | 2009-12-31 |
KR101130597B1 (ko) | 2012-04-02 |
US8383401B2 (en) | 2013-02-26 |
KR20080064833A (ko) | 2008-07-09 |
EP1930433A4 (en) | 2009-09-16 |
EP1930433A1 (en) | 2008-06-11 |
US20110256114A1 (en) | 2011-10-20 |
JPWO2007032255A1 (ja) | 2009-03-19 |
CN101287831A (zh) | 2008-10-15 |
EP1930433B1 (en) | 2016-03-16 |
US8951510B2 (en) | 2015-02-10 |
US20130115199A1 (en) | 2013-05-09 |
JP5655233B2 (ja) | 2015-01-21 |
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