WO2005045027A1 - Wt1由来のhla−dr結合性抗原ペプチド - Google Patents
Wt1由来のhla−dr結合性抗原ペプチド Download PDFInfo
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- WO2005045027A1 WO2005045027A1 PCT/JP2004/016336 JP2004016336W WO2005045027A1 WO 2005045027 A1 WO2005045027 A1 WO 2005045027A1 JP 2004016336 W JP2004016336 W JP 2004016336W WO 2005045027 A1 WO2005045027 A1 WO 2005045027A1
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- 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
- C07K14/46—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates
- C07K14/47—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K39/00—Medicinal preparations containing antigens or antibodies
- A61K39/0005—Vertebrate antigens
- A61K39/0011—Cancer antigens
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K39/00—Medicinal preparations containing antigens or antibodies
- A61K39/0005—Vertebrate antigens
- A61K39/0011—Cancer antigens
- A61K39/001152—Transcription factors, e.g. SOX or c-MYC
- A61K39/001153—Wilms tumor 1 [WT1]
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P35/00—Antineoplastic agents
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P37/00—Drugs for immunological or allergic disorders
- A61P37/02—Immunomodulators
- A61P37/04—Immunostimulants
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- 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
- C07K14/46—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates
- C07K14/47—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals
- C07K14/4701—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals not used
- C07K14/4748—Tumour specific antigens; Tumour rejection antigen precursors [TRAP], e.g. MAGE
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- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
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- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
- C12N15/09—Recombinant DNA-technology
- C12N15/11—DNA or RNA fragments; Modified forms thereof; Non-coding nucleic acids having a biological activity
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
Definitions
- the present invention relates to an HLA-DRB1 * 0405-binding antigen peptide derived from WT1.
- the WT1 gene (Wilms' tumor gene 1) has been identified as one of the causative genes of Wilms tumor, a childhood renal tumor (Cell 60: 509, 1990, Nature 343: 774, 1990).
- the WT1 gene encodes the transcription factor WT1, which plays an important role in cell proliferation, differentiation, apoptosis, and organ formation (Int. Rev. Cytol. 181: 151, 1998).
- the WT 1 gene was positioned as a tumor suppressor gene, but subsequent studies have found expression in various solid tumors including leukemia, lung cancer and breast cancer, but rather as an oncogene that promotes cancer growth.
- peptide-specific cytotoxic T cells are induced by in vitro stimulation of HLA-A * 0201-positive or HLA-A * 2402-positive peripheral blood mononuclear cells with WT1-derived peptides. These CTLs have been shown to damage cancer cells of leukemias and solid tumors that endogenously express WT1.
- WT1 is a promising target molecule for cancer immunotherapy (cancer vaccine therapy) (Int. J. Hematol 76: 127, 2002) 0
- helper T cells specific to cancer antigen are reported to be important (Cancer Res 62:.. 6438 , 2002) 0
- Helper T cells (CD4 positive T cells) are induced (proliferated) by recognizing a complex of MHC class II molecules of antigen-presenting cells and an antigen peptide.
- Activated helper sputum cells produce cytoplasmic ins such as IL-2, IL-4, IL-5, IL-6, or interferon, and assist in B cell proliferation, differentiation, and maturation.
- Active helper T cells have the function of promoting the proliferation, differentiation, and maturation of other subsets of T cells (Tc, TD cells, etc.). In this way, active helper T cells have the function of activating the immune system by promoting the proliferation and activation of B cells and T cells.
- MHC class Hell under the action of II-binding antigenic peptide (also called helper peptide) It is considered useful to enhance the function of par T cells and enhance the effects of cancer vaccines (J. Immunother., 24: 195, 2001).
- An object of the present invention is to provide an HLA-DRB1 * 0405-binding antigen peptide derived from WT1 and use of the peptide as a cancer vaccine action enhancer.
- WT1-derived MHC class II-binding antigen peptide helper peptide
- helper peptide WT1-derived MHC class II-binding antigen peptide
- WT1 has an antigenic peptide part that binds to HLA-DRB 1 * 0405 and induces helper T cells among many MHC class II subclasses. I found it. This finding has made possible a new treatment that can induce and enhance WT1-specific helper T cells for HLA-DRB1 * 0405 positive cancer patients.
- helper peptide can bind to a plurality of HLA-class II molecules and induce a helper CD4 positive T cell, that is, the existence of a promiscuous helper peptide (British J. cancer, 85 (10), pl527-1534 (2001), J. Immunol., 169, p557-565 (2002)) o Therefore, the present inventor found as one of the HLA_DRB1 * 0405 binding antigen peptides (helper peptides). He WT1 force promiscuous
- WT1 was HLA-DRB1 * 0405
- helper peptide WT1 of the present invention has HLA-DRB1 * 0405.
- WT1 has an antigenic peptide that binds to HLA_DRB1 * 1502 and induces helper T cells among many existing MHC class II subclasses. I found that there was a minute!
- the present invention has been completed based on such findings.
- SEQ ID NO: 2 The amino acid residue at position 1, position 4, position 6, and position Z or position 9 of the amino acid sequence described in any of SEQ ID NO: 23 is replaced with another amino acid residue.
- SEQ ID NO: 2 The amino acid residue at position 1, position 4, position 6, and position Z or position 9 of the amino acid sequence of any one of SEQ ID NO: 23 is selected from the following: The peptide according to (4) above, comprising an amino acid sequence substituted with any amino acid residue:
- 4th place Palin, isoleucine, leucine, methionine, aspartic acid, glutamic acid, 6th place: asparagine, serine, threonine, glutamine, lysine, aspartic acid, 9th place: aspartic acid, glutamic acid, glutamine,
- SEQ ID NO: 46 containing the amino acid sequence set forth in any of SEQ ID NO: 56, the peptide according to (7),
- a pharmaceutical composition comprising the peptide according to any one of (1) and (10), the expression vector according to (12) or the cell according to (13), and a pharmaceutically acceptable carrier.
- a pharmaceutical composition comprising a combination of the peptide according to any one of (1) and (9) above and a cancer antigen peptide,
- a pharmaceutical composition comprising the peptide according to any one of (1) and (9) above and a pharmaceutically acceptable carrier, and a pharmaceutical composition comprising a cancer antigen peptide and a pharmaceutically acceptable carrier.
- a kit for the treatment or prevention of cancer comprising
- a method for treating or preventing cancer comprising combining the peptide according to any one of (1) and (9) above and a cancer antigen peptide, and administering it to a subject in need thereof , Regarding.
- the present invention provides a WT1-derived HLA-DRB1 * 0405-binding antigen peptide, a polynucleotide encoding the peptide, an inducer of helper T cells containing these peptides and polynucleotides, and the like.
- the helper T cell inducer of the present invention is useful as an enhancer of cancer vaccine action.
- the cancer vaccine action enhancer of the present invention is applicable to many HLA-DRB1 * 0405-positive cancer patients, and is particularly useful as a WT1 vaccine action enhancer.
- the present invention is a peptide consisting of 10-25 amino acids in the amino acid sequence of human WT1 described in SEQ ID NO: 1, and binds to HLA-DRB1 * 0405 to induce helper T cells.
- a peptide that is derived is provided.
- the N-terminal amino acid residue and / or the C-terminal amino acid residue may be modified, or a specific amino acid residue may be modified.
- helper T cells a peptide that induces helper T cells (a peptide that induces CD4 positive T cells)” may be referred to as “helper peptide”.
- amino acid sequence of human WT1 described in SEQ ID NO: 1 is a known sequence described in Cell, 60: 509, 1990, NCBI database Accession No. XP — 034418 and Accession No. P19544.
- the peptide of the present invention is a partial peptide of WT1 consisting of continuous 10-25 amino acids in the amino acid sequence of human WT1 set forth in SEQ ID NO: 1.
- the definition of “10-25 amino acids” is based on the fact that the MHC class II binding peptide strength is generally 10-25 amino acids (Immunogenetics, 41,178-228 (1995), Biochimica et Biophysica Acta 1316, 85 -101 (1996), Immunology, 96, l-9 (1999), Peptides, Vol.19, 179-198 (1998),
- a peptide having a continuous 13-17 amino acid strength in the amino acid sequence of human WT1 is mentioned.
- the peptide of the present invention is described in SEQ ID NO: 1.
- the candidate peptide binds to HLA_DRB1 * 0405 to induce helper T cells.
- PBMC peripheral blood mononuclear cells
- rod-shaped cells adhered cells
- helper T cells CD4 positive T cells
- helper T cells were induced (activated) in response to peptide stimulation.
- (1) Proliferation activity of the helper T cells and (2) Cytoforce-in production activity of helper T cells are measured.
- the proliferation activity of (1) can be specifically examined by measuring the amount of [] -thymidine incorporated into helper T cells.
- the cytoforce-in production activity of (2) can be examined by measuring the amount of site force-ins such as IFN- ⁇ produced by active helper T cells by enzyme immunoassay (ELISA) or the like. it can.
- the peptide is immobilized in the peptide-containing groove because the side chains of amino acid residues on the peptide bind to the peptide-containing groove and the amino acid residues that are well conserved in the peptide-containing groove of all MHC class II molecules. This is due to the bond between the side chain of the group and the peptide main chain.
- the peptide-containing groove has polymorphisms in the amino acid residues that constitute the large and small pots in the peptide-containing groove for each MHC class II molecule.
- the motif of the amino acid residue of the peptide that binds to the pocket portion of the tide-containing groove can be deduced. Since a peptide with a binding motif of about 9 amino acid residues binds in the peptide-containing groove and both ends of the peptide can protrude from both ends of the groove, the peptide that can bind to the MHC class II molecule
- the length is considered to be unlimited in principle. However, in many cases, long peptides are often cleaved with peptidases to a length of 13-17 amino acids (immunobiology, 5th Edt., 116-117, Garland Publishing (2001)).
- the first, fourth, sixth, and ninth amino acid residues of the 9 amino acid HLA (MHC) binding moiety have the following regularity: (See Immunogenetics, 41,178-228 (1995), Biochimica et Biophysica Acta 1316, 85-101 (1996)).
- WT1 (SEQ ID NO: 1) has an antigen peptide portion that binds to HLA-DRB1 * 0405 (one of MHC class II) and induces helper T cells.
- the 9 amino acid portion predicted to have binding to HLA-DRB1 * 0405 includes, for example, the 9 amino acid portion of WT1 described in SEQ ID NOs: 2-23 be able to. That is, as a specific example of the peptide of the present invention, a peptide containing the amino acid sequence shown in any of SEQ ID NO: 2—SEQ ID NO: 23 and binding to HLA-DRB1 * 0405 to induce helper T cells. Is mentioned.
- the peptide is a partial peptide of WT1 containing the amino acid sequence of SEQ ID NO: 2-23, and has an activity of inducing helper T cells by binding to HLA-DRB 1 * 0405 As long as the length is not particularly limited. As described above, since the peptide having about 9 amino acid residues having the binding motif structure binds to the peptide-containing groove and both ends of the peptide can protrude from both ends of the groove, MHC class II molecules In principle, there is no limitation on the length of the peptide that can be bound to.
- the MHC class II-binding peptides reported to date have a length of about 10-25 amino acids (Immunogenetics, 41,178-228 (1995). ), Biochimica et Biophysica Acta 1316, 85-101 (1996), Immunology, 96, 1-9 (1999), Peptides, Vol. 19, 179-198 (1998), immunobiology, 5th Edt., 116—117, Garland Publishing (2001)) o
- the peptides of the present invention are preferably about 10-25 amino acids long, more preferably about 13-17 amino acids long.
- the preferred form of the peptide of the present invention containing the amino acid sequence of SEQ ID NO: 2—SEQ ID NO: 23 is as follows: SEQ ID NO: 2—SEQ ID NO: 23 A partial peptide of WT1 consisting of 10-25 amino acids (preferably 13-17 amino acids) containing the amino acid sequence described in 1. and a peptide having an activity of inducing helper T cells by binding to HLA-DRB1 * 0405 Can be mentioned.
- a more preferred form is a partial peptide of WT1 consisting of 10-25 amino acids (preferably 13-17 amino acids) containing the amino acid sequence set forth in SEQ ID NO: 12, comprising HLA-DRB1 * 0405 And a peptide having an activity of inducing helper T cells by binding to.
- a more preferred form is a partial peptide of WT1 consisting of 16-25 amino acids (preferably 16-17 amino acids) containing the amino acid sequence set forth in SEQ ID NO: 24, and HLA-DRB1 * 0405 Peptides having the activity of binding to induce helper T cells can be mentioned.
- the amino acid sequence described in SEQ ID NO: 24 is a partial peptide of WT1 having a capacity of 16 amino acids containing the amino acid sequence described in SEQ ID NO: 12.
- a more preferred form includes a peptide consisting of the amino acid sequence set forth in SEQ ID NO: 24.
- the peptide of the present invention may be appropriately modified within a range that retains activity.
- modification of amino acid residues means substitution, deletion and Z or addition of amino acid residues (including addition of amino acids to the N-terminal and C-terminal of peptides), preferably amino acid residues Substitution.
- the number and position of amino acid residues to be substituted are arbitrary as long as the activity as a helper peptide is maintained. Since the length of the peptide to be bound is about 10-25 amino acids, the range of 1 to several is preferred.
- Such a peptide according to the substitution of the present invention include the first, fourth, sixth and Z of the amino acid sequence shown in any one of SEQ ID NO: 2—SEQ ID NO: 23.
- 4th place Palin, isoleucine, leucine, methionine, aspartic acid, glutamic acid, 6th place: asparagine, serine, threonine, glutamine, lysine, aspartic acid, 9th place: aspartic acid, glutamic acid, glutamine,
- substitution of the amino acid residues at the 1st, 4th, 6th and Z or 9th positions is, for example, in the natural type helper peptide of the present invention consisting of the partial sequence of WT1 shown above. It can be performed for the purpose of enhancing its binding to HLA-DRB1 * 0405 or enhancing its activity. Substituted 1st, 4th, 6th, and any part other than Z or 9th
- the natural sequence ie, the partial sequence of WTl
- further modification may be performed as long as the activity is maintained.
- the first, fourth, sixth and / or ninth amino acid residues of the amino acid sequence shown in SEQ ID NO: 12 are
- 6th place asparagine, serine, threonine, glutamine, lysine, aspartic acid
- 9th place aspartic acid, glutamic acid, glutamine
- the WT1 partial peptide (SEQ ID NO: 24) having the amino acid sequence of 16 amino acids containing the amino acid sequence set forth in SEQ ID NO: 12, the 3rd, 6th, 8th and / or Or the 11th amino acid residue is
- 8th place asparagine, serine, threonine, glutamine, lysine, aspartic acid
- 11th place aspartic acid, glutamic acid, glutamine
- a peptide having an amino acid sequence power substituted with any amino acid residue is exemplified. Further, it may be a peptide having 16-25 amino acidity containing the substituted amino acid sequence of SEQ ID NO: 24.
- the present invention also provides a peptide (so-called “epotope peptide”) containing the helper peptide (natural peptide, modified peptide) of the present invention and a cancer antigen peptide.
- CTLs are efficiently induced by an epitope peptide obtained by linking a cancer antigen peptide (also referred to as a CTL epitope) and a helper peptide (also referred to as a helper epitope).
- helper T cells CD4 positive T cells activated by helper peptides are used to induce and maintain CTL differentiation, macrophages, etc.
- helper T cells CD4 positive T cells activated by helper peptides are used to induce and maintain CTL differentiation, macrophages, etc.
- CTL epitope cancer antigen peptide consisting of 280 to 288 of melanoma antigen gplOO
- helper epitope T helper epitope derived from tetanus toxin
- Such an epitope peptide containing the helper peptide of the present invention and a cancer antigen peptide can also be exemplified as a specific example of the peptide of the present invention.
- any conventionally known cancer antigen peptide can be used, and preferably a cancer antigen peptide derived from WT1 (natural peptide, modified peptide) is used.
- WT1 naturally peptide, modified peptide
- HLA-A1, -A0201, -A0204, -A0205, -A0206, -A0207, -All, -A24, —A31, —A6801, -B7, —B8, -B2705, -B37, derived from WT1 — Cw0401, -Cw0602, etc. include restricted cancer antigen peptides.
- cancer antigen peptide derived from WT1 include activity as a cancer antigen peptide among peptides listed in Tablell-TableXLVI of International Publication No. 2000/18795 pamphlet and modified peptides thereof (binding to HLA antigen). Peptides having activity of inducing CTLs).
- cancer antigen peptides include, for example, the following cancer antigen peptides:
- the peptides described in SEQ ID NO: 27 and SEQ ID NO: 29 are peptides that bind to HLA-A24 antigen and HLA-A2 antigen, and are described in SEQ ID NO: 44 and SEQ ID NO: 45. These peptides are peptides that bind to the HLA-A2 antigen. Other peptides are peptides that bind to the HLA-A24 antigen.
- the cancer antigen peptide according to any one of SEQ ID NO: 27, SEQ ID NO: 28, SEQ ID NO: 29, SEQ ID NO: 30, SEQ ID NO: 44 or SEQ ID NO: 45 is exemplified.
- the epitope peptide of the present invention is, for example, a part of WT1 consisting of 10-25 amino acids containing the amino acid sequence set forth in any one of SEQ ID NO: 2—SEQ ID NO: 23.
- an epitope peptide containing a helper peptide consisting of the amino acid sequence set forth in SEQ ID NO: 24 and a cancer antigen peptide described in any one of SEQ ID NOs: 27-45 can be mentioned. More preferred is an epitope peptide containing a helper peptide having the amino acid sequence ability described in SEQ ID NO: 24 and a cancer antigen peptide described in any of SEQ ID NOs: 27-30, 44, and 45.
- Such an epitope peptide can be produced by a general peptide synthesis method as described above. It can also be produced using conventional DNA synthesis and genetic engineering techniques based on the sequence information of a polynucleotide encoding an epitope peptide obtained by linking these epitopes. That is, the polynucleotide is inserted into a well-known expression vector, a transformant produced by transforming a host cell with the obtained recombinant expression vector is cultured, and a plurality of target epitopes are ligated from the culture. It can be produced by collecting the epitope peptide. These methods are based on the methods described in the literature as described above (Molecular Cloning, T. Maniatis et al., CSH Laboratory (1983), DNA Cloning, DM. Glover, IRL PRESS (1985) and the methods described later. It can be carried out.
- the epitopic peptide has activity as a helper peptide.
- the epitope peptide has activity as a cancer antigen peptide, for example, WO 02/47474 and Int J.
- the epitope peptide of the present invention comprises a helper T cell (CD4 positive T cell) activated by a helper peptide moiety contained in the epitope peptide, which induces and maintains CTL differentiation, macrophages, etc.
- helper T cell CD4 positive T cell
- a helper peptide moiety contained in the epitope peptide which induces and maintains CTL differentiation, macrophages, etc.
- the induction of CTL by the cancer antigen peptide contained in the epitope peptide can be further enhanced and thus can be used for more effective treatment or prevention of cancer.
- amino group of the N-terminal amino acid or the carboxyl group of the C-terminal amino acid of the peptide of the present invention may be modified. That is, peptides in which the N-terminal amino acid residue and / or the C-terminal amino acid residue are modified are also included in the category of the peptide of the present invention.
- examples of the modifying group of the amino group of the N-terminal amino acid include 1 to 3 carbon atoms of 1 to 6
- examples of the acyl group include alkanoyl groups having 1 to 6 carbon atoms and alkanoyl groups having 1 to 6 carbon atoms substituted with the full group.
- a carbocyclic group substituted by a cycloalkyl group having 5 to 7 carbon atoms an alkyl sulfonyl group having 1 to 6 carbon atoms, a phenol sulfonyl group, or an alkoxy carboxylic group having 2 to 6 carbon atoms.
- an alkoxy carbo yl group substituted with a phenol group a carbo yl group substituted with a cycloalkoxy having 5 to 7 carbon atoms, a phenoxy carbo ol group and the like.
- Examples of the peptide in which the carboxyl group of the C-terminal amino acid is modified include an ester form and an amide form.
- Specific examples of the ester form include substitution with an alkyl ester having 1 to 6 carbon atoms and a phenol group.
- Specific examples of amide compounds include one or two of an amide, an alkyl group having 1 to 6 carbon atoms, and the like. Substituted amides, amides substituted with 1 or 2 carbon atoms substituted with a phenyl group, 5- to 7-membered azacyclos containing the nitrogen atom of the amide group Examples include amides that form alkanes.
- the present invention also provides a polynucleotide encoding the peptide of the present invention (natural peptide, modified peptide or epitope peptide).
- the polynucleotide encoding the peptide of the present invention may be in the form of DNA or RNA.
- These polynucleotides of the present invention can be easily produced based on the amino acid sequence information of the peptide of the present invention and the sequence information of the DNA encoded thereby. Specifically, it can be produced by ordinary DNA synthesis or PCR amplification.
- a polynucleotide encoding the epitope peptide can be mentioned. More specifically, for example, a partial peptide of WT1 consisting of 10-25 amino acids containing the amino acid sequence described in any of SEQ ID NO: 2—SEQ ID NO: 23, which binds to HLA-DRB1 * 0405. And a polynucleotide encoding an epitope peptide containing a helper peptide that induces helper T cells and the cancer antigen peptide of any one of SEQ ID NOs: 27-45.
- an epitope peptide comprising a helper peptide consisting of the amino acid sequence set forth in SEQ ID NO: 24 and a cancer antigen peptide set forth in any one of SEQ ID NOs: 27-45
- the polynucleotide which codes is mentioned.
- the polynucleotide encoding the peptide of the present invention includes a polynucleotide that is hybridized under stringent conditions with a complementary sequence of the polynucleotide and that encodes a peptide having the same activity as the peptide of the present invention. included.
- hybridization used here is, for example, Sambrook J., Frisch EF, Maniatis T. Molecular Cloning 2nd edition), Cold Spring Harbor Laboratory press (Cold Spring Harbor Laboratory press), etc.
- stringent conditions means, for example, 6 X SSC (a solution containing 1.5 M NaCl and 0.15 M trisodium citrate is set to 10 X SSC), and 45 ° in a solution containing 50% formamide. List the conditions such that a hybrid is formed in C and then washed with 2 X SSC at 50 ° C (Molecular Biology, John Wiley & Sons, NY (1989), 6.3.1-6.3.6). Can do.
- a recombinant expression vector for expressing the peptide of the present invention can be prepared.
- the expression vector used here can be appropriately selected according to the host to be used, purpose, etc., and includes plasmids, phage vectors, virus vectors and the like.
- examples of the vector include plasmid vectors such as pUC118, pUC119, pBR322, and pCR3, and phage vectors such as ⁇ ⁇ ⁇ and gtll.
- examples of the vector include pYES2, pYEUra3 and the like.
- the host is an insect cell, pAcSGHisNT-A and the like can be mentioned.
- plasmid vectors such as pKCR, pCDM8, pGL2, pcDNA3.1, pRc / RSV, and pRc / CMV
- viral vectors such as retrovirus vectors, adenovirus vectors, and adeno-associated virus vectors can be used. Can be mentioned.
- the vector is a gene encoding a promoter capable of inducing expression and a signal sequence.
- factors such as a selection marker gene and a terminator may be appropriately included.
- a sequence expressed as a fusion protein with thioredoxin, His tag, or GST (Dartathione S-transferase) may be added to facilitate isolation and purification.
- a GST fusion protein vector such as PGEX4T
- PGEX4T that has an appropriate promoter (such as lac, tac, trc, trp, CMV, or SV40 early promoter) that functions in the host cell
- a vector that has a tag sequence such as Myc or His.
- pcDNA3.1 / Myc-His a vector that expresses a fusion protein with thioredoxin and His tag can be used.
- a transformed cell containing the expression vector By transforming a host with the expression vector prepared above, a transformed cell containing the expression vector can be prepared.
- Examples of the host used here include Escherichia coli, yeast, insect cells, animal cells and the like.
- E. coli include E. coli K-12 strains HB101 strain, C600 strain, JM109 strain, DH5 ⁇ strain, AD494 (DE3) strain, and the like.
- yeast include Saccharomyces cerevisiae.
- animal cells include L929 cells, BALB / c3T3 cells, C127 cells, CHO cells, COS cells, Vero cells, Hela cells, and the like. Insect cells include s! 9.
- a normal method suitable for the host cell may be used. Specifically, the calcium phosphate method, DEAE-dextran method, electo-poration method, lipid for gene transfer (Lipofectamine, Lipofectin;
- a transformed cell in which the expression vector is introduced into the host cell can be selected by culturing in a normal medium containing a selection marker.
- the peptide of the present invention can be produced.
- the obtained peptide can be further isolated and purified by a general biochemical purification means.
- the purification means include salting out, ion exchange chromatography, adsorption chromatography, affinity chromatography, gel filtration chromatography and the like.
- the polypeptide of the present invention is expressed as a fusion protein with the aforementioned thioredoxin, His tag, GST or the like, These proteins can be isolated and purified by a purification method using the properties of the fusion protein or tag
- the present invention provides an antibody that specifically binds to the peptide of the present invention.
- the antibody of the present invention may be a polyclonal antibody or an monoclonal antibody using the peptide of the present invention as an immunogen without any particular limitation on its form!
- the antibody of the present invention is not particularly limited as long as it specifically binds to the peptide of the present invention as described above. Specifically, the amino acid sequence of any one of SEQ ID NO: 2—SEQ ID NO: 23 is used. And an antibody that specifically binds to a helper peptide that binds to HLA-DRB1 * 0405 and induces helper T cells. Preferred examples include antibodies that specifically bind to a helper peptide consisting of the amino acid sequence set forth in SEQ ID NO: 24.
- a non-human animal such as a rabbit can be immunized and obtained from the serum of the immunized animal according to a conventional method.
- the peptide of the present invention can be obtained from hyperidoma cells prepared by immunizing a non-human animal such as a mouse and fusing the obtained spleen cells and myeloma cells. eSaru (and urrent protocols in Molecular Biology edit. Ausubel et al. (1987) Publish. John Wiley and Sons. Section 11.4 1.11.11).
- Preparation of an antibody against the peptide of the present invention can also be carried out by enhancing immunological reaction using various adjuvants depending on the host.
- adjuvants include Freund's adjuvant, mineral gels such as aluminum hydroxide, and surfaces such as lysolecithin, pull-mouth polyol, polyion, peptides, oil emulsions, keyhole limpet hemocyanin and dinitrophenol.
- Active substances human adjuvants such as BCG (Bacille Calmette Guerin) and Corynebaterum-Parvum.
- an antibody that recognizes the peptide and an antibody that neutralizes the activity can be easily prepared.
- Applications of antibodies include affinity chromatography, immunological diagnosis, and the like.
- the immunological diagnosis can be appropriately selected from immunoblotting, radioimmunoassay (RIA), enzyme immunoassay (E LISA), fluorescence or luminescence assay.
- RIA radioimmunoassay
- E LISA enzyme immunoassay
- fluorescence or luminescence assay is a cancer in which the WT1 gene is expressed, that is, stomach cancer, colon cancer, lung cancer, breast cancer, germ cell cancer, skin cancer, bladder cancer, prostate cancer, uterine cancer, cervical cancer, ovary Effective in diagnosing cancer
- the present invention relates to a peptide of the present invention (natural peptide, modified peptide, epitope peptide), an expression vector containing the polynucleotide of the present invention, or a cell containing the expression vector of the present invention, And a pharmaceutical composition containing an acceptable carrier.
- the pharmaceutical composition can be effectively used as a helper T cell inducer or cancer vaccine action enhancer. This will be specifically described below.
- Helper T cell inducer comprising the peptide of the present invention as an active ingredient
- the peptide of the present invention has the ability to induce helper T cells, and the induced helper T cells can induce cancer through induction and maintenance of CTL differentiation and activation of single cells such as macrophages.
- the CTL-inducing activity which is the action of a vaccine, can be further enhanced. That is, the present invention provides a cancer vaccine action enhancer (pharmaceutical composition as a cancer vaccine action enhancer) containing the peptide of the present invention as an active ingredient.
- the action enhancer of the present invention When the action enhancer of the present invention is administered to an HLA-DRB1 * 0405 positive and WT1 positive patient, the peptide of the present invention is presented to the HLA-DRB1 * 0405 antigen of the antigen-presenting cell, and the peptide is combined with the HLA_DRB1 * 0405 antigen.
- Specific helper T cells CD4 positive T cells
- CD4 positive T cells that recognize the body are induced and activated to induce and maintain CTL differentiation, and to exert the activity of effector cells such as macrophages Therefore, it is possible to enhance the CTL induction activity that is an effect of a cancer vaccine.
- the cancer vaccine effect-enhancing agent of the present invention is a cancer with an increased expression level of the WT1 gene, for example, hematological cancers such as leukemia, myelodysplastic syndrome, multiple myeloma, malignant lymphoma Can also be used in the prevention or treatment of solid cancers such as stomach cancer, colon cancer, lung cancer, breast cancer, germ cell cancer, liver cancer, skin cancer, bladder cancer, prostate cancer, uterine cancer, cervical cancer, ovarian cancer, etc.
- hematological cancers such as leukemia, myelodysplastic syndrome, multiple myeloma, malignant lymphoma
- solid cancers such as stomach cancer, colon cancer, lung cancer, breast cancer, germ cell cancer, liver cancer, skin cancer, bladder cancer, prostate cancer, uterine cancer, cervical cancer, ovarian cancer, etc.
- the cancer vaccine action enhancer of the present invention can be administered simultaneously with the cancer vaccine, or can be administered before or after the cancer vaccine administration.
- the cancer vaccine action enhancer comprising the peptide of the present invention as an active ingredient may be a single helper peptide as an active ingredient or an epitope linked to a cancer antigen peptide (CTL epitope). It may be one containing a peptide as an active ingredient. As described above, in recent years, it has been shown that CTL is efficiently induced by an epitope peptide obtained by linking a cancer antigen peptide (CTL epitope) and a helper peptide (helper epitope).
- CTL epitope cancer antigen peptide
- helper epitope helper epitope
- helper peptide When administered in the form of such an epitope peptide, the helper peptide is taken up into the antigen-presenting cell and then undergoes intracellular degradation, and the helper peptide is MHC class II antigen (HLA- DRB1 * 0405) and a cancer antigen peptide bind to MHC class I antigen to form a complex, and the complex is presented at a high density on the surface of the antigen-presenting cell.
- MHC class II antigen HLA- DRB1 * 0405
- Helper T cell recognizes complex of HLA-DRB1 * 0405 antigen and helper peptide, induces and maintains CTL differentiation, and activates effector cells such as macrophages. Further enhances the activity.
- CTL recognizes and proliferates the complex of cancer antigen peptide and MHC class I antigen and destroys cancer cells. Therefore, the pharmaceutical yarn composition comprising the epitope peptide of the present invention as an active ingredient is used as a cancer vaccine action enhancer and also as a cancer vaccine itself.
- the cancer vaccine action enhancer comprising the peptide of the present invention as an active ingredient is administered together with a pharmaceutically acceptable carrier, for example, an appropriate adjuvant, or particles so that cellular immunity is effectively established.
- a pharmaceutically acceptable carrier for example, an appropriate adjuvant, or particles so that cellular immunity is effectively established.
- a pharmaceutically acceptable carrier for example, an appropriate adjuvant, or particles so that cellular immunity is effectively established.
- a pharmaceutically acceptable carrier for example, an appropriate adjuvant, or particles so that cellular immunity is effectively established.
- a pharmaceutically acceptable carrier for example, an appropriate adjuvant, or particles so that cellular immunity is effectively established.
- a pharmaceutically acceptable carrier for example, an appropriate adjuvant, or particles so that cellular immunity is effectively established.
- a pharmaceutically acceptable carrier for example, an appropriate adjuvant, or particles so that cellular immunity is effectively established.
- the adjuvant those described in the literature (Clin. Microbiol. Rev., 7: 277-289, 1994) and the like
- Examples of the administration method include intradermal administration, subcutaneous administration, intramuscular administration, intravenous administration and the like.
- the dosage of the peptide of the present invention in the preparation can be adjusted as appropriate depending on the disease to be treated, the patient's age, body weight, etc.
- O.OOOlmg—1000 mg preferably O.OOlmg—1000 mg, more preferably O .lmg—10 mg, preferably administered once every few days or months.
- the present invention also provides a pharmaceutical composition comprising a combination of the peptide of the present invention and a cancer antigen peptide.
- a pharmaceutical composition comprising a combination of the peptide of the present invention and a cancer antigen peptide.
- the cancer antigen peptide's action as a cancer vaccine is enhanced by the peptide of the present invention, and cancer treatment or prevention is achieved more effectively. Can do.
- “Combination” includes administration of the peptide of the present invention and cancer antigen peptide in a mixed form and administration in separate forms.
- a premixed formulation can be used, or a separately formulated formulation can be used as needed.
- cancer antigen peptide cancer vaccine
- cancer vaccine action enhancer it is possible to administer the cancer antigen peptide after administering the peptide of the present invention (cancer vaccine action enhancer), or to administer the cancer antigen peptide (cancer vaccine). Then, the peptide of the present invention (cancer vaccine action enhancer) may be administered.
- the kit can be shown in column f.
- cancer antigen peptide used in combination with the peptide of the present invention a cancer antigen peptide derived from WT1 (natural peptide, modified peptide), preferably any known cancer antigen peptide can be used.
- the cancer antigen peptide described in SEQ ID NOs: 27-45 can be mentioned, and the cancer antigen peptide described in any of SEQ ID NOs: 27-30, 44, 45 is preferable.
- Helper T cell inducer comprising the expression vector of the present invention as an active ingredient Not only the peptide of the present invention but also an expression vector containing a polynucleotide encoding the peptide has a helper ⁇ cell-inducing activity and can be used as an active ingredient of a cancer vaccine action enhancer. That is, the present invention provides a cancer vaccine action enhancer (pharmaceutical composition as a cancer vaccine action enhancer) containing, as an active ingredient, an expression vector containing a polynucleotide encoding the peptide of the present invention.
- polynucleotide encoding the epitope peptide of the present invention into an appropriate expression vector, it can be used as an active ingredient of a cancer vaccine action enhancer.
- the expression vector containing the polynucleotide of the present invention is applied as an active ingredient of a cancer vaccine action enhancer, the following method can be used.
- a viral vector method and other methods As a method for introducing an expression vector containing the polynucleotide of the present invention into a cell, a viral vector method and other methods (Nikkei Science, April 1994, pp. 20-45, Monthly Pharmaceutical Affairs, 36 (1), 23-48 (1994), experimental medicine special edition, 12 (15), (1994), and cited references thereof, etc.) can be applied.
- Examples of the method using a viral vector include DNA viruses or RNA viruses such as retroviruses, adenoviruses, adeno-associated viruses, herpes viruses, vaccinia viruses, box viruses, polioviruses, and synbis viruses.
- An example is a method of introducing DNA.
- methods using retroviruses, adenoviruses, adeno-associated viruses, vaccinia viruses, etc. are particularly preferred.
- DNA vaccine method direct administration of the expression vector into the muscle
- ribosome method lipofectin method
- microinjection method calcium phosphate method
- electoral position method is preferred, and the DNA vaccine method and the ribosome method are particularly preferred.
- an in vivo method When administered by an in vivo method, it can be administered by an appropriate administration route according to the disease, symptom or the like for the purpose of treatment. For example, it can be administered intravenously, artery, subcutaneously, intradermally, intramuscularly. When administered by an in vivo method, for example, it can take a pharmaceutical form such as a solution, but is generally an injection containing the expression vector of the present invention, which is an active ingredient, and is used as needed. May be added.
- liposomes or membrane fusion ribosomes containing the expression vector of the present invention are in the form of ribosome preparations such as suspensions, freezing agents, and centrifugal concentrated freezing agents. be able to.
- the content of the expression vector of the present invention in the preparation can be adjusted as appropriate depending on the disease to be treated, the age, weight, etc. of the patient. Usually, O.OOOlmg—100 mg, preferably O.OOlmg—10 mg of the present invention.
- the expression vector is preferably administered once every few days to several months.
- the expression vector of the present invention as described above is administered to an HLA-DRB1 * 0405-positive and WT1-positive patient, the peptide of the present invention is presented to the HLA-DRB 1 * 0405 antigen of the antigen-presenting cell.
- a specific helper T cell CD4 positive T cell
- CD4 positive T cell that recognizes the complex of HLA-DRB1 * 0405 antigen is induced and activated, and induces and maintains CTL differentiation, and effects such as macrophage It can exert cell activity and thus enhance CTL inducing activity, which is an effect of cancer vaccine.
- the cancer vaccine action potentiator comprising an expression vector containing the polynucleotide of the present invention as an active ingredient is a cancer associated with an increase in the expression level of the WT1 gene, such as leukemia, myelodysplastic syndrome, multiple myeloma, malignant lymphoma
- WT1 gene such as leukemia, myelodysplastic syndrome, multiple myeloma, malignant lymphoma
- blood cancer such as gastric cancer, colon cancer, lung cancer, breast cancer, germ cell cancer, liver cancer, skin cancer, bladder cancer, prostate cancer, uterine cancer, cervical cancer, ovarian cancer, etc. Can be used for this purpose.
- an expression vector containing a polynucleotide encoding an epitope peptide is administered as described above, it is incorporated into an antigen-presenting cell and then subjected to intracellular degradation.
- helper peptides are MHC class II antigens (
- HLA-DRB1 * 0405 and the cancer antigen peptide bind to MHC class I antigen to form a complex, and the complex is displayed at a high density on the surface of the antigen-presenting cell.
- the helper T cell recognizes the complex of HLA-DRB1 * 0405 antigen and helper peptide, and is an effect of cancer vaccine through the induction and maintenance of CTL differentiation and the effect of effector cells such as macrophages. Further enhances CTL inducing activity.
- CTL recognizes and proliferates the complex of cancer antigen peptide and MHC class I antigen and destroys cancer cells. Therefore, a pharmaceutical composition comprising an expression vector containing a polynucleotide encoding the epitope peptide of the present invention as an active ingredient is used as a cancer vaccine action enhancer and also as a cancer vaccine itself. .
- the present invention relates to a peptide consisting of 10 to 25 amino acids in the amino acid sequence of human WT1 described in SEQ ID NO: 1, which binds to HLA-DRB1 * 1502 and induces a helper T cell.
- the HLA-DRB1 * 1502 binding antigen peptide of the present invention may be modified at its N-terminal amino acid residue and / or C-terminal amino acid residue or at a specific amino acid residue. .
- the synthesis and activity measurement of the HLA-DRB1 * 1502-binding antigen peptide of the present invention can be performed by the same method as the HLA-DRB1 * 0405-binding antigen peptide of the present invention.
- the HLA-DRB1 * 1502-binding antigen peptide of the present invention is a partial peptide of WT1 having a continuous 10-25 amino acid power in the amino acid sequence of human WT1 described in SEQ ID NO: 1.
- Preferable is a peptide having a continuous 13-17 amino acid force in the amino acid sequence of human WT1.
- human WT1 has an antigenic peptide part that induces helper T cells by binding to HLA_DRB1 * 1502, and is a force MHC class II binding sequence prediction program ProPred (Bioinformatics 17: 1236,2001), 9 amino acid moieties predicted to have binding to HLA-DRB1 * 1502 (9 amino acid moieties capable of binding in the peptide-containing groove of MHC class II molecules) SEQ ID NO: 46—described in SEQ ID NO: 56 The 9 amino acid part of WT1.
- HLA-DRB1 * 1502 binding antigen peptide of the present invention contains the amino acid sequence of any one of SEQ ID NO: 46 to SEQ ID NO: 56 and binds to HLA_DRB1 * 1502. Peptides that induce T helper cells.
- the peptide is preferably about 10-25 amino acids long, more preferably about 13-17 amino acids long.
- it is a partial peptide of WT1 having 10 to 25 amino acids (preferably 13 to 17 amino acids) containing the amino acid sequence shown in SEQ ID NO: 50, which binds to HLA_DRB1 * 1502 to helper T Examples thereof include peptides having cell-inducing activity.
- it is a partial peptide of WT1 having 16-25 amino acids (preferably 16-17 amino acids) containing the amino acid sequence shown in SEQ ID NO: 24, which binds to HLA_DRB1 * 1502 and helps Peptides having an activity to induce T cells can be mentioned.
- the amino acid sequence described in SEQ ID NO: 24 is a partial peptide of WT1 having 16 amino acid strength containing the amino acid sequence described in SEQ ID NO: 50.
- WT1 consisting of the amino acid sequence set forth in SEQ ID NO: 24
- the WT1 peptide is composed of only HLA-DRB1 * 0405 molecules.
- helper peptide that can be applied not only to patients having HLA_DRB1 * 0405 but also to patients having HLA_DRB1 * 1502, and is useful from the viewpoint of wide application range of patients.
- the epitope peptide, polynucleotide, antibody and pharmaceutical composition relating to the HLA_DRB1 * 1502 binding antigen peptide of the present invention should be carried out in the same manner as in the case of the HLA-DRB1 * 0405 binding antigen peptide of the present invention. Can do.
- PBMC Peripheral blood mononuclear cells
- X-VIVO 15 TM medium (Camblex) containing 1% AB serum, seeded on a 6-well culture plate, and cultured for 2 hours. After culturing, floating cells were removed, and the attached cells were washed with Hanks solution.
- Adherent cells were cultured with X-VIVO 15 TM medium containing 1% AB serum, lOOOU / ml IL-4 and lOOOU / ml GM-CSF. On days 2 and 4, half of the culture was removed and fresh culture was added. On the 6th day, TNF-a was added so as to be lOOU / ml. The cells on day 7 were used as rodent cells in the experiment.
- a rosette set (Stemcell), an antibody cocktail for CD4 positive T cell separation, was added to about 100 ml of blood diluted 2-fold with RPMI medium, and left at room temperature for 20 minutes. Thereafter, CD4-positive T cells were collected by FicoU-Paque density gradient centrifugation.
- the rod-shaped cells prepared in (1) above were seeded in a 24-well culture plate at 3 X 10 5 per well, and the peptide of SEQ ID NO: 24 was added to 50 g / ml. After 4 hours of incubation, the cells were stopped growing by irradiation with 25 Gy X-rays. Next, 3 ⁇ 10 6 CD4 positive cells prepared in (2) were added per well, and mixed culture was performed with rod-shaped cells. X-VIVO 15 TM culture medium containing 1% AB serum was used as the culture medium. Half of the culture medium was changed every 2 days from the start of the culture, and IL-2 was added to 20 U / ml.
- T cells were collected on the 7th and 14th day from the start of the culture, Seed 3 x 10 6 cells per well in a 24-well plate, pulsed with 20 ⁇ g / ml peptide (SEQ ID NO: 24), and then X-irradiated with 25 Gy 3x 10 Five cells were added and mixed culture was performed.
- the culture medium used was X-VIVO 15 TM culture medium containing 1% AB serum and 20 U / ml IL-2.
- T cells after the third stimulation were collected and seeded at 3 x 10 4 per well in a 96-well culture plate. Further, 3 ⁇ 10 4 rod-shaped cells pulsed with 20 g / ml peptide (SEQ ID NO: 24) and then irradiated with X-rays at 25 Gy were added and cultured.
- SEQ ID NO: 24 20 g / ml peptide
- X-rays at 25 Gy were added and cultured.
- As a negative control a group in which peptides were pulsed and V-like, and rod-shaped cells were mixed and cultured with T cells, and a group in which 0.2% PHA was added instead of rod-shaped cells as a positive control were set.
- the rod-shaped cells prepared by the method described in Example 1 were seeded in a 96-well plate at 10 4 cells per well, and CD4 positive T cells induced with the peptide WT1 of SEQ ID NO: 24 were further added to the 96-well plate.
- the culture medium used was X-VIVO 15 TM culture medium containing 1% AB serum, 20 U / ml IL-2, and 5 g / ml PHA.
- G2 cell line a CD4 positive T cell line was established and named “G2 cell line”.
- the reactivity of the G2 cell line to the rods that were pulsed with the peptide was measured in the same manner as in Example 1. The result is shown in figure 2.
- the G2 cell line can be obtained by mixing and culturing with WT1 peptide-pulsed rod cells.
- the G2 cell line is a CD4-positive T cell specific for the WT1 peptide.
- peripheral blood mononuclear cells were collected from the blood collected from healthy human volunteers who were positive for HLA-DRB1 * 0405 by FicoU-Paque density gradient centrifugation. 10 7 PBMCs were seeded per well in a 24-well plate.
- As the culture solution RPMI1640 culture solution containing 10% FCS and 55 M of 2ME was used. After adding a culture solution containing Epstein-Barr virus (Epstein-Barr virus: EBV) and culturing for 4 weeks, an EBV-transformed B cell line was established, and B-LCL (—) cells and Named. EBV was prepared from the culture supernatant of cell line B95-8 (JCRB cell bank No.
- B- LCL (—) cells Adjust B- LCL (—) cells to 3 ⁇ 10 7 cells / mL, add culture medium containing virus that expresses the WT1 gene, and then add polypropylene to a final concentration of 8 g / mL. Then, 1 mL was seeded on a 24-well plate. After culturing for 16 hours, 1 mL of a new culture solution was added and the culture was continued. G418 (neomycin) was added at 0.7 g / mL, and the cells were cultured for 5-7 days to select cells into which the gene had been introduced. The B cell line expressing WT1 selected in this way was named B-LCU +) cells.
- B-LCL (—) cells and B-LCU +) cells The expression level of WT1 gene in B-LCL (—) cells and B-LCU +) cells was measured by RT-PCR. The method was converted according to the literature (Blood, 89: 1405, 1997), assuming that the expression level of the positive control K562 cells was 1. As a result, B-LCL (-) cells, whereas it is 1.6 X 10- 4, B-LCU +) cells was 3.2, that WT1 gene is highly expressed was confirmed. The reactivity of G2 cells to B-LCL (+) cells was examined in the same manner as in Example 2. To confirm HLA-DR binding, a group was also established in which B-LCU +) was treated with anti-HLA-DR antibody before mixing with G2 cells. The results are shown in Figure 3.
- Peptide-specific CD4-positive T cell line G2 shows a proliferative response in mixed culture with B-LCU + cells that endogenously express WT1 gene, and this reaction is inhibited by anti-HLA-DR antibody It was shown that. These results indicate that the WT1 peptide is generated from the WT1 protein in the cell and is endogenously converted to the HLA-DR molecule.
- Example 4 Establishment of WT1 peptide-specific CD4-positive T cell line E04.1
- rod-shaped cells were prepared using blood from which healthy volunteers who were positive for HLA-DRB1 * 0405 were also collected.
- TNF- ⁇ added on the 6th day was adjusted to a final concentration of 200 IU / ml.
- blood collected from the same healthy volunteer force used for the preparation of rod cells was used.
- CD4 positive T cells were isolated according to the package insert of RosetteSep (StemCell).
- CD4 positive T cells specific for the WT1 peptide (SEQ ID NO: 24: WT1) were induced in the same manner as in Example 1 using the above-described rod cells and CD4 positive T cells. This WT1 pep
- the CD4 positive T cell line E04.1 was established by culturing the CD4 positive T cells specific to the chid by the limiting dilution method.
- PBMCs prepared by the method described in Example 1 as feeder cells were seeded at 1 ⁇ 10 5 per well after X-ray irradiation.
- X-VIVO 15 TM medium containing 20 IU / ml IL-2 and 5 g / ml PHA was used as a culture solution.
- E04.1 cells can be mixed and cultured with rod-shaped cells pulsed with WT1 peptide.
- E04.1 cells are WT1 peptide specific
- CD4 positive T cell line was revealed.
- Example 4 E04.1 cells established in Example 4 were seeded at 1 ⁇ 10 4 per well of a 96-well culture plate.
- Example 3 after pulsing WT1 peptide at a concentration of 20 ⁇ g / ml into BLA strain B-LCL (-) cells established in HLA_DRB1 * 0405 positive healthy volunteer blood force
- WT1 peptide was irradiated with X-rays after pulse.
- B-LCL (-) cells were treated with 20 ⁇ g / ml anti-HLA-DR antibody (G46.6, BD ParMingen)
- a group was also set which was treated with HLA-classl antibody (G46-2.6, BD ParMingen) and anti-HLA-DQ antibody (SPVL3, Immunotech) for 30 minutes and then mixed with E04.1 cells.
- HLA-classl antibody G46-2.6, BD ParMingen
- SPVL3, Immunotech anti-HLA-DQ antibody
- E04.1 cells are mixed and cultured with B-LCL (-) cells pulsed with WT1 peptide
- E04.1 cells are proliferative responses in WT1 peptide-pulsed B-LCL (-) cells treated with other antibodies.
- PBMCs were prepared in the same manner as in Example 4 from the blood of healthy volunteers who were positive or negative for HLA-DRB1 * 0405. Pulse this PBMC with 20 ⁇ g / ml WT1 peptide.
- X-irradiation was performed, and 3 ⁇ 10 4 cells were seeded per well of a 96-well culture plate. Further, E04.1 cells were seeded in a 96-well culture plate and IX 10 4 cells per well were mixed and cultured. In addition, as a negative control, a group in which peptide was pulsed and PBMC and E04.1 cells were mixed and cultured was also used.
- WT1 peptide is a polymorphic HLA-DRB1 molecule.
- Example 3 HLA-DRB1 * 0405 positive healthy volunteer blood force established B cell line B-LCL (-) and WT1-expressing B cell line B-LCL (+) after X-irradiation, 3 X 10 4 cells per well, were mixed culture by inoculating 1 X 10 4 cells of E04.1 cells. Thereafter, proliferation of E04.1 cells was measured in the same manner as in Example 4. The results are shown in FIG. E04.1 cells showed a proliferative response when mixed with WT1-expressing B cell line B-LCL (+), and did not show a proliferative response when mixed with B-LCL (-) that did not express WT1.
- the 332-347 peptide was degraded from the WT1 protein in the cells of B-LCL (+) cells and then presented to HLA-DRB1 * 0405, which was shown to induce proliferation of E04.1 cells. .
- Induction of apoptosis of B-LCL (-) and B-LCL (+) cells was performed by osmotic shock.
- 1 X 10 6 cells were suspended in 500 ⁇ 1 hyperosmotic medium (RPM medium containing 0.5 M sucrose, 10% w / v polyethylene glycol 1000, 10 mM HEPES, pH 7.2), and then at 37 ° C. Let stand for 10 minutes. Thereafter, the mixture was diluted 30-fold with a low osmotic pressure medium (60% RPMI, 40% water) preliminarily set at 37 ° C. and allowed to stand at 37 ° C. for 2-3 minutes.
- RPM medium hyperosmotic medium
- 60% RPMI, 40% water preliminarily set at 37 ° C. and allowed to stand at 37 ° C. for 2-3 minutes.
- Example 8 The cells were collected by centrifugation at room temperature for 5 minutes and used as apoptosis-inducing cells. Induction of apoptosis was confirmed by fluorescent dye Propidium Iodide and phosphatidylserine binding reagent Annexin V for staining dead cells. [0084] Example 8
- E04.1 cells were mixed with rod cells that were not pulsed with a peptide was also set.
- Brefeldin A was added to a final concentration of 10 / z g / ml to inhibit exocytosis of E04.1 cells.
- CD4 positive T cells were recovered, fixed with PBS containing 2% formaldehyde, and treated with a permeabilization solution containing 0.1% saponin to increase the cell membrane permeability of the antibody.
- E04.1 cells are rod-shaped cells pulsed with WT1 peptide
- Th-1 type site force in IL-4 production was not induced by the mixed culture with Th-1 type site force in IFN- ⁇ .
- E04.1 cells were reacted with anti-CD4 antibody and anti-CXCR3 antibody, stained, and analyzed by a flow cytometer. The result is shown in FIG. Over 90% of E04.1 cells were shown to be CD4-positive and CXCR3-positive Th-1-type CD4-positive T cells.
- CXCR3 is a chemokine receptor and is known to be highly expressed in Th-1 type immune cells.
- WT1 peptide is a WT1 peptide-specific CD4 positive cell line E04.1 cell.
- WT1 peptide (20 ⁇ g / ml) + E04.1 cells (1.5 X 10 6 / well)
- Yohi 04.1 cells were added and cultured at 37 ° C for 7 days.
- X-VIVO 15 TM medium containing 10% AB serum was used as the medium.
- the WT1 peptide used here is HLA-A * 2402.
- Fig. 11 shows the results of analysis using a meter. PBMC were stimulated with WT1 peptide
- the cells were fixed and treated with a permeabilization solution to enhance cell membrane permeability in the same manner as in Example 8, and then the inside of the cells was stained with PE-labeled anti-IFN- ⁇ antibody.
- a permeabilization solution to enhance cell membrane permeability in the same manner as in Example 8, and then the inside of the cells was stained with PE-labeled anti-IFN- ⁇ antibody.
- APC-labeled anti-mouse IgG antibody (BD PharMingen) was also performed, and IFN-v positive and mouse IgG positive cell population was excluded as non-specific staining.
- the ratio of activated WT1 peptide-specific CTL was 17.0%.
- the percentage of activated WT1 peptide-specific CTL increased to 39.0%.
- the WT1 peptide increased the induction and activation of WT1-specific CTL precursors.
- helper ⁇ cells that enhance the activation of WT1-specific CTLs, and are mediated by WT1 peptides.
- WT1 peptide also binds to HLA-DRB 1 * 1502 molecule
- Promiscuous helper peptide capable of inducing WT1-specific CD4-positive T cells
- PBMC Peripheral blood mononuclear cells
- HLA-DRB1 * 1502/1403 healthy blood donors
- 1% AB type serum Naabi, Miami, FL
- X-VIVO 15 culture solution Cambrex
- 1000 IU / ml IL-4 PeproTech
- 1000 IU / ml GM-CSF PeproTech
- 1% type AB serum X-VIVO 15 medium In culture.
- CD4 positive T cells were separated using the same blood donor power RosetteSep (StemCell) for CD4 positive T cell separation. Place each CD4 positive T cell (3 X 10 6 cells) into each well of a 24-well plate, pulse it with 20 ⁇ g / ml of WT1 peptide, and irradiate it with 25 Gy.
- the cells were stimulated with dendritic cells (3 ⁇ 10 5 cells), and IL-2 was added at 20 IU / ml the day after stimulation.
- Stimulated CD4 positive T cells were similarly pulsed with WT1 peptide at 20 ⁇ g / ml every other week.
- Stimulation was performed using cultured rod cells. After the second stimulation, the medium was changed every other day with a medium containing IL-2. CD4 positive T cells induced by a total of 3 stimuli were used in the experiment.
- Proliferation assay was performed by [ 3 H] -thymidine incorporation method.
- Peptide-stimulated and induced CD4 positive T cells (3 x 10 4 responders) and WT1, WT1, WT1
- CD4-positive T cells and stimulator were co-cultured in the same manner as in the growth assay, and after 2 hours, Brefeldin A was added. After 4 hours, cells were collected, fixed / permeated, stained with FITC-labeled anti-IL-4 antibody (BD Pharmingen) and PE-labeled anti-IFN-y antibody (BD Pharmingen), and flow cytometry was performed. .
- CD4 positive T cells which were separated from healthy blood donors (HLA-DRB1 * 1502/1403), were stimulated a total of three times using their own rod-shaped cells pulsed with WT1 peptide.
- Peptide specificity of induced CD4 positive T cells is measured by WT1, WT1, WT1
- Induced CD4-positive T cells can be obtained in the absence of peptide or upon stimulation with WT1 or WT1.
- CD4-positive T cells were shown to have WT1 specificity.
- E15.2 subline was stimulated by WT1 peptide, and secreted IL-4 and IFN- ⁇ were
- IL-4 which is a Th-1 type site force-in
- IL-4 which is a Th-2 type site force-in
- WT1-specific proliferation response of the E15.2 subline is dependent on the concentration of WT1.
- WT1 peptide was pulsed to the peripheral blood mononuclear cells of one HLA-DRB1 * 1502-positive healthy person (1502/0901) and one HLA-DRB1 * 1502-negative healthy person (1302/0803).
- E15.2 which is a WT1 peptide-specific Th-1-type CD4-positive T cell line
- WT1 is the most common HLA-DRB1 * 0405 molecule in Japanese by subline analysis
- the present invention provides a WT1-derived HLA-DRB1 * 0405-binding antigen peptide, a polynucleotide encoding the peptide, an inducer for helper T cells containing these peptides and polynucleotides, and the like.
- the helper T cell inducer of the present invention is useful as an enhancer of cancer vaccine action.
- the cancer vaccine action enhancer of the present invention is applicable to many HLA-DRB1 * 0405-positive cancer patients, and is particularly useful as a WT1 vaccine action enhancer.
- FIG. 1 CD4 positive T cells (helper T cells) stimulated with WT1-derived peptide WT1
- WT1 pulse refers to rod-shaped cells pulsed with WT1 peptide.
- WT1 response is the reaction with rod-shaped cells pulsed with WT1 peptide.
- Each shows sex.
- the vertical axis shows the amount of [] -thymidine taken up by CD4 positive T cells ( cpm).
- Non-treatment is the result of pulsing the peptide and using the spider cells
- WT1 pulse is the result of using the WT1 pulsed spider cells.
- the vertical axis indicates the amount of [] -thymidine (cpm) incorporated into the G2 cell line.
- FIG. 3 shows the results of examining the reactivity of the G2 cell line to B-LCU + cells expressing the WT1 gene.
- B-LCL (-) indicates the results using B-LCL ( ⁇ ) cells that do not express the WT1 gene
- B_LCL (+) indicates B-LCU +) cells that express the WT1 gene.
- the results used and “B-LCL (+) + anti-HLA-DR antibody” show the results using B-LCL (+) treated with anti-HLA-DR antibody.
- the vertical axis indicates the amount of [] -thymidine (cpm) incorporated into the G2 cell line.
- the vertical axis represents the amount of [ 3 H] -thymidine (cpm) incorporated into the E04.1 cell line.
- FIG. 5 Stimulated cells pulsed with WT1-derived peptide WT1 were treated with various HLA-inhibiting antibodies.
- B-cell line B-LCL (-) cells established in Example 3 in which healthy human volunteers with positive HLA-DRB 1 * 0405 positive blood force were used as stimulating cells.
- “-” indicates the result of using the stimulating cell without pulsing the peptide
- “332” indicates the result of using the stimulating cell pulsed with the WT1 peptide.
- a -classlj is a stimulator cell treated with WT1 peptide and anti-HLA-class I antibody
- 332 + -DRJ is a stimulator cell treated with WT1 peptide and anti-HLA-DR antibody.
- the “332 + mIgG” is a negative control for WT1 peptide and inhibitory antibody.
- the result using the stimulation cell processed with the mouse IgG antibody is shown.
- the vertical axis represents the amount of [ 3 H] -thymidine (cpm) incorporated into the E04.1 cell line.
- Donor's HLA-DRB1 genotype is Donor 1
- HLA-DRBl * 0405/0803 Donor 2 (HLA-DRB1 * 0405/0101), Donor3 (HLA-DRB1 * 0101/1001) and Donor 4 (HLA-DRBl * 1201/0802).
- the vertical axis represents the amount of [ 3 H] -thymidine (cpm) incorporated into the E04.1 cell line.
- FIG. 7 shows the results of examining the reactivity of the E04.1 cell line against B-LCL (+) cells expressing the WT1 gene.
- B-LCL (-) is the result of using B-LCL ( ⁇ ) cells that do not express WT1 as stimulating cells
- ⁇ -LCL (+) is the B-LCL that expresses WT1 gene.
- LCL (+) cells as stimulating cells are shown.
- the vertical axis represents the amount of [] -thymidine (cpm) incorporated into the E04.1 cell line.
- FIG. 8 shows the results of examining the reactivity of the E04.1 cell line to rod-shaped cells pulsed with B-LCL (+) cells that induced apoptosis.
- apoptotic B-LCL (+) indicates a case in which apoptosis is induced in B-LCL (+) cells expressing the WT1 gene and then pulsed into rod cells.
- Apoptotic B-LCL ( ⁇ ) indicates a case in which apoptosis is induced in B-LCL ( ⁇ ) cells that do not express the WT1 gene and then pulsed into rod cells.
- E04.1 + represents the case where E04.1 cells were mixed and cultured with rod-shaped cells
- ⁇ 04.1-] represents the case where E04.1 cells were not mixed and cultured.
- the vertical axis shows the amount of [] -thymidine (cpm) incorporated into the E04.1 cell line.
- the results using rod-shaped cells pulsed with 332-347 peptide are shown.
- the vertical axis shows the percentage of E04.1 cells in which IL-4 (white bar) or IFN- ⁇ (black bar) production was observed.
- FIG. 10 shows the results of staining the E04.1 cell line with anti-CD4 antibody and anti-CXCR3 antibody and analyzing with a flow cytometer.
- the horizontal axis represents CD4 positive cells
- the vertical axis represents CXCR3 positive cells.
- the percentage of CD4 positive and CXCR3 positive cells was 90.1%.
- the vertical axis represents WT1 peptide / HLA-A * 2402-positive cells.
- the horizontal axis indicates anti-mouse IgG antibody positive cells.
- E is the WT1 page.
- F is WT1 peptide + WT1 peptide
- G is WT1 peptide + E04.1
- H shows the results of stimulation with WT1 peptide + WT1 peptide + E04.1 cells
- FIG. 13 CD4 positive T cells stimulated with WT1-derived peptide WT1 and various rod-shaped cells
- the vertical axis represents the amount of [] -thymidine (cpm) incorporated into the separated cell line.
- A) shows the results when the E15.1 cell line is used, and B) shows the results when the E15.2 cell line is used. ** in the figure indicates that a statistically significant difference was observed between the experimental groups.
- FIG. 16 E15.2 cell line against autologous PBMC pulsed with WT1-derived peptide WT1
- V-shaped rod cells show that 332 is self-pulsed with WT1 peptide.
- the result using PBMC is shown.
- the vertical axis shows the percentage of E15.2 cells in which production of IL-4 (white bar) or IFN- ⁇ (black bar) was observed.
- the vertical axis shows the amount of [] -thymidine (cpm) incorporated into the E15.1 cell line.
- the horizontal axis shows the pulse concentration of WT1 peptide to autologous PBMC.
- A) shows the case of using PBMC derived from HLA-DRB1 * 1502-positive healthy persons
- B shows the case of using PBMC derived from HLA-DRB1 * 1502-negative healthy persons.
- the vertical axis shows the amount of [] -thymidine (cpm) incorporated into the E15.2 cell line.
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Abstract
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Priority Applications (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005515303A JP4621142B2 (ja) | 2003-11-05 | 2004-11-04 | Wt1由来のhla−dr結合性抗原ペプチド |
| US10/578,183 US20080070835A1 (en) | 2003-11-05 | 2004-11-04 | Hla-Dr-Binding Antigen Peptide Derived From Wt1 |
| CA2544214A CA2544214C (en) | 2003-11-05 | 2004-11-04 | Hla-dr-binding antigen peptide derived from wt1 |
| EP04799497A EP1696027A4 (en) | 2003-11-05 | 2004-11-04 | ANTIGEN PEPTIDE BINDING TO ORIGINAL HLA-DR WT1 |
| KR1020137011325A KR20130062368A (ko) | 2003-11-05 | 2004-11-04 | Wt1 유래의 hla-dr 결합성 항원 펩티드 |
| KR1020067010568A KR101213015B1 (ko) | 2003-11-05 | 2004-11-04 | Wt1 로부터 유도된 hla-dr 결합성 항원 펩티드 |
| KR1020127013720A KR101522079B1 (ko) | 2003-11-05 | 2004-11-04 | Wt1 유래의 hla-dr 결합성 항원 펩티드 |
| US13/755,185 US10124046B2 (en) | 2003-11-05 | 2013-01-31 | HLA-DR-binding antigen peptide derived from WT1 |
| US15/920,121 US11027003B2 (en) | 2003-11-05 | 2018-03-13 | HLA-DR-binding antigen peptide derived from WT1 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003375603 | 2003-11-05 | ||
| JP2003-375603 | 2003-11-05 |
Related Child Applications (3)
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|---|---|---|---|
| US10/578,183 A-371-Of-International US20080070835A1 (en) | 2003-11-05 | 2004-11-04 | Hla-Dr-Binding Antigen Peptide Derived From Wt1 |
| US13/755,185 Division US10124046B2 (en) | 2003-11-05 | 2013-01-31 | HLA-DR-binding antigen peptide derived from WT1 |
| US15/920,121 Continuation US11027003B2 (en) | 2003-11-05 | 2018-03-13 | HLA-DR-binding antigen peptide derived from WT1 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2005045027A1 true WO2005045027A1 (ja) | 2005-05-19 |
Family
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Family Applications (1)
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|---|---|---|---|
| PCT/JP2004/016336 Ceased WO2005045027A1 (ja) | 2003-11-05 | 2004-11-04 | Wt1由来のhla−dr結合性抗原ペプチド |
Country Status (14)
| Country | Link |
|---|---|
| US (3) | US20080070835A1 (ja) |
| EP (2) | EP1696027A4 (ja) |
| JP (1) | JP4621142B2 (ja) |
| KR (3) | KR20130062368A (ja) |
| CN (2) | CN100513563C (ja) |
| AT (1) | ATE540111T1 (ja) |
| CA (1) | CA2544214C (ja) |
| CY (1) | CY1112585T1 (ja) |
| DK (1) | DK2071028T3 (ja) |
| ES (1) | ES2378264T3 (ja) |
| PL (1) | PL2071028T3 (ja) |
| PT (1) | PT2071028E (ja) |
| SI (1) | SI2071028T1 (ja) |
| WO (1) | WO2005045027A1 (ja) |
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| CA2544214A1 (en) | 2005-05-19 |
| EP2071028B1 (en) | 2012-01-04 |
| JPWO2005045027A1 (ja) | 2007-05-17 |
| US20130243800A1 (en) | 2013-09-19 |
| KR20120067374A (ko) | 2012-06-25 |
| KR101522079B1 (ko) | 2015-05-21 |
| CN100513563C (zh) | 2009-07-15 |
| US20180207254A1 (en) | 2018-07-26 |
| EP1696027A4 (en) | 2008-05-14 |
| US11027003B2 (en) | 2021-06-08 |
| CY1112585T1 (el) | 2016-02-10 |
| CN1902313A (zh) | 2007-01-24 |
| US20080070835A1 (en) | 2008-03-20 |
| KR20060123756A (ko) | 2006-12-04 |
| PL2071028T3 (pl) | 2012-06-29 |
| KR20130062368A (ko) | 2013-06-12 |
| EP2071028A3 (en) | 2009-06-24 |
| EP2071028A2 (en) | 2009-06-17 |
| ATE540111T1 (de) | 2012-01-15 |
| ES2378264T3 (es) | 2012-04-10 |
| KR101213015B1 (ko) | 2012-12-26 |
| US10124046B2 (en) | 2018-11-13 |
| DK2071028T3 (da) | 2012-03-05 |
| CA2544214C (en) | 2018-08-28 |
| EP1696027A1 (en) | 2006-08-30 |
| JP4621142B2 (ja) | 2011-01-26 |
| CN101580538A (zh) | 2009-11-18 |
| CN101580538B (zh) | 2013-06-19 |
| PT2071028E (pt) | 2012-04-10 |
| SI2071028T1 (sl) | 2012-03-30 |
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