WO2024190905A1 - Hpv特異的細胞傷害性t細胞のt細胞受容体又はその機能的断片 - Google Patents
Hpv特異的細胞傷害性t細胞のt細胞受容体又はその機能的断片 Download PDFInfo
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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
- C07K14/70503—Immunoglobulin superfamily
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- A61K35/14—Blood; Artificial blood
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- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
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- C12N5/10—Cells modified by introduction of foreign genetic material
Definitions
- the present invention relates to a T cell receptor for HPV-specific cytotoxic T cells, a functional fragment thereof, and uses thereof.
- High-risk human papillomavirus is present in 99% of cases of cervical cancer, with HPV16 accounting for 50-60% and HPV18 accounting for approximately 20%.
- prophylactic HPV vaccines can prevent early infection with high-risk HPV types, these vaccines are not effective against established cancer.
- total hysterectomy is indicated, which leads to loss of fertility despite ovarian preservation and increases the long-term risk of cardiovascular disease.
- Metastatic and recurrent cervical cancer is generally incurable. It is also highly resistant to chemotherapy, especially in young women (Non-Patent Document 1).
- Cervical cancer cells constitutively express the E6 and E7 oncoproteins, contributors to tumorigenesis and cancer cell survival, making E6 and E7 attractive therapeutic targets.
- the objective of the present invention is to clone the T cell receptor of HPV-specific cytotoxic T cells and provide a T cell receptor or a functional fragment thereof that has an excellent antitumor effect.
- the present inventors induced peripheral blood HPV16E6-CTL targeting the HPV16 E6 antigen of cervical cancer from healthy donors at a cell processing center, performed single cell cloning, established T-iPS cells, edited the HLA genome using CRISPR/Cas9 technology, carefully excluded off-target effects, and created a master cell bank to serve as the raw material for clinical rejT cells. Then, induced differentiation of HPV16E6-rejT.
- the present inventors have succeeded in inducing HPV16E6-rejT, which contains a very large amount of tissue resident memory T cells, and have demonstrated that the binding of the surface antigen CD103 of tissue resident memory T cells with E-cadherin expressed in cervical cancer cells increases the production of cytocidal proteins, and increases antigen binding, resulting in a strong antitumor effect.
- HPV16E6-rejT which is abundant in tissue resident memory T cells
- TCR T cell receptor
- a T cell receptor for HPV16E6-specific cytotoxic T cells having an ⁇ chain CDR3 region consisting of the amino acid sequence shown in SEQ ID NO: 3 or an amino acid sequence resulting from the substitution, deletion or addition of 1 to 3 amino acids to said amino acid sequence, and a ⁇ chain CDR3 region consisting of the amino acid sequence shown in SEQ ID NO: 8 or an amino acid sequence resulting from the substitution, deletion or addition of 1 to 3 amino acids to said amino acid sequence.
- T cell receptor or a functional fragment thereof according to any of [1] to [6], further comprising an ⁇ chain J region consisting of the amino acid sequence shown in SEQ ID NO: 4 or an amino acid sequence resulting from the substitution, deletion or addition of 1 to 3 amino acids to said amino acid sequence, and a ⁇ chain J region consisting of the amino acid sequence shown in SEQ ID NO: 9 or an amino acid sequence resulting from the substitution, deletion or addition of 1 to 3 amino acids to said amino acid sequence.
- the iPS cell according to [11] which is an HPV16E6-specific cytotoxic T-iPS cell.
- a vector comprising DNA of the T cell receptor or a functional fragment thereof described in any one of [1] to [8].
- a pharmaceutical composition comprising HPV16E6-specific cytotoxic T cells or T-iPS cells having the T cell receptor or a functional fragment thereof according to any one of [1] to [8].
- the pharmaceutical composition according to [14] which is a pharmaceutical composition for treating cervical cancer.
- a cellular pharmaceutical comprising HPV16E6-specific cytotoxic T cells having the T cell receptor or a functional fragment thereof according to any one of [1] to [8].
- the cellular pharmaceutical described in [16] which is a cellular pharmaceutical for treating cervical cancer.
- HPV16E6-specific cytotoxic T cells or T-iPS cells having the T cell receptor or a functional fragment thereof according to any one of [1] to [8] for the manufacture of a therapeutic agent for cervical cancer.
- HPV16E6-specific cytotoxic T cells or T-iPS cells characterized in that they contain tissue-resident memory T cells.
- a pharmaceutical composition comprising HPV16E6-specific cytotoxic T cells or T-iPS cells, characterized in that the composition comprises tissue-resident memory T cells.
- a cellular pharmaceutical comprising HPV16E6-specific cytotoxic T cells or T-iPS cells, characterized in that the cellular pharmaceutical comprises tissue-resident memory T cells.
- HPV16E6-specific cytotoxic T cells or T-iPS cells characterized in that they comprise T cells whose surface antigen is CD3+, CD8+, CD62L-, CCR7-, CD103+ or CD69+.
- a pharmaceutical composition comprising HPV16E6-specific cytotoxic T cells or T-iPS cells, characterized in that the composition comprises T cells whose surface antigen is CD3+, CD8+, CD62L-, CCR7-, CD103+ or CD69+.
- a cellular medicine comprising HPV16E6-specific cytotoxic T cells or T-iPS cells, characterized in that the medicine comprises T cells whose surface antigen is CD3+, CD8+, CD62L-, CCR7-, CD103+ or CD69+.
- HPV-specific cytotoxic T cells or T-iPS cells having the T cell receptor of the HPV16E6 antigen-specific cytotoxic T cells of the present invention or a functional fragment thereof are useful as therapeutic agents for cervical cancer.
- HPV16E6 tetramer staining after PBMC peptide stimulation are shown.
- the results of HPV16E6 tetramer staining after single cell cloning are shown.
- the results of HPV16E6 tetramer staining of HPV16E6-rejT are shown.
- the results show that HPV16E6-rejT exhibits strong antigen recognition and cell-killing effect against cervical cancer cell lines (SiHa, SKGIIIa).
- HPV16E6-rejT shows high expression of Granzyme B and Perforin compared with HPV16E6-CTL clones.
- HLA-edited HPV16E6-rejT shows an overwhelmingly higher proportion of tissue-resident memory T cells compared to HPV16E6-CTL clones. It has been shown that cervical cancer cells highly express the epithelial marker E-cadherin. 1 shows the amino acid sequences of the ⁇ -chain and ⁇ -chain of the T cell receptor of HPV16E6-specific cytotoxic T cells. 1 shows the nucleotide sequence encoding the amino acid sequences of the ⁇ and ⁇ chains of the T cell receptor of HPV16E6-specific cytotoxic T cells.
- One aspect of the present invention is a T cell receptor for HPV16E6-specific cytotoxic T cells, or a functional fragment thereof, characterized in having an ⁇ chain CDR3 region consisting of the amino acid sequence shown in SEQ ID NO:3 or an amino acid sequence resulting from the amino acid sequence by substitution, deletion or addition of 1 to 3 amino acids, and a ⁇ chain CDR3 region consisting of the amino acid sequence shown in SEQ ID NO:8 or an amino acid sequence resulting from the amino acid sequence by substitution, deletion or addition of 1 to 3 amino acids.
- Another aspect of the present invention is a T cell receptor of HPV16E6-specific cytotoxic T cells or a functional fragment thereof, characterized in having an ⁇ chain CDR3 region consisting of the amino acid sequence shown in SEQ ID NO:3 or an amino acid sequence obtained by substituting, deleting or adding 1 to 3 amino acids to said amino acid sequence; an ⁇ chain L region consisting of the amino acid sequence shown in SEQ ID NO:1 or an amino acid sequence obtained by substituting, deleting or adding 1 to 3 amino acids to said amino acid sequence; a ⁇ chain CDR3 region consisting of the amino acid sequence shown in SEQ ID NO:8 or an amino acid sequence obtained by substituting, deleting or adding 1 to 3 amino acids to said amino acid sequence; and a ⁇ chain L region consisting of the amino acid sequence shown in SEQ ID NO:6 or an amino acid sequence obtained by substituting, deleting or adding 1 to 3 amino acids to said amino acid sequence.
- Another aspect of the present invention is a T cell receptor of HPV16E6-specific cytotoxic T cells or a functional fragment thereof, characterized in that it has an ⁇ chain CDR3 region consisting of the amino acid sequence shown in SEQ ID NO:3 or an amino acid sequence obtained by substituting, deleting or adding 1 to 3 amino acids to said amino acid sequence; an ⁇ chain L region consisting of the amino acid sequence shown in SEQ ID NO:1 or an amino acid sequence obtained by substituting, deleting or adding 1 to 3 amino acids to said amino acid sequence; an ⁇ chain V region consisting of the amino acid sequence shown in SEQ ID NO:2 or an amino acid sequence obtained by substituting, deleting or adding 1 to 3 amino acids to said amino acid sequence; a ⁇ chain CDR3 region consisting of the amino acid sequence shown in SEQ ID NO:8 or an amino acid sequence obtained by substituting, deleting or adding 1 to 3 amino acids to said amino acid sequence; a ⁇ chain L region consisting of the amino acid sequence shown in SEQ ID NO:6 or an amino acid sequence
- T cell receptor of HPV16E6-specific cytotoxic T cells or a functional fragment thereof comprising an ⁇ chain CDR3 region consisting of the amino acid sequence shown in SEQ ID NO:3 or an amino acid sequence obtained by substituting, deleting or adding 1 to 3 amino acids to said amino acid sequence; an ⁇ chain L region consisting of the amino acid sequence shown in SEQ ID NO:1 or an amino acid sequence obtained by substituting, deleting or adding 1 to 3 amino acids to said amino acid sequence; an ⁇ chain J region consisting of the amino acid sequence shown in SEQ ID NO:4 or an amino acid sequence obtained by substituting, deleting or adding 1 to 3 amino acids to said amino acid sequence; and an ⁇ chain CDR3 region consisting of the amino acid sequence shown in SEQ ID NO:2 or an amino acid sequence obtained by substituting, deleting or adding 1 to 3 amino acids to said amino acid sequence.
- a ⁇ chain CDR3 region consisting of the amino acid sequence shown in SEQ ID NO:8 or an amino acid sequence obtained by substituting, deleting or adding 1 to 3 amino acids to said amino acid sequence
- a ⁇ chain L region consisting of the amino acid sequence shown in SEQ ID NO:6 or an amino acid sequence obtained by substituting, deleting or adding 1 to 3 amino acids to said amino acid sequence
- a ⁇ chain V region consisting of the amino acid sequence shown in SEQ ID NO:7 or an amino acid sequence obtained by substituting, deleting or adding 1 to 3 amino acids to said amino acid sequence
- a ⁇ chain J region consisting of the amino acid sequence shown in SEQ ID NO:9 or an amino acid sequence obtained by substituting, deleting or adding 1 to 3 amino acids to said amino acid sequence.
- HPV is a type of virus that belongs to the papillomavirus family and is deeply involved in the development of cervical cancer.
- HPV16 is detected in 50-60% of cervical cancer cases.
- E6 and E7 are said to be deeply involved in the development of cervical cancer.
- TCRs T cell receptors
- TCRs are responsible for the antigen recognition function of T cells and are composed of proteins such as ⁇ chains, ⁇ chains, ⁇ chains, and ⁇ chains.
- a heterodimer of TCR ⁇ chain protein (TCR ⁇ ) and TCR ⁇ chain protein (TCR ⁇ ), or a heterodimer of ⁇ and ⁇ chains forms TCR together with the CD3 complex (including ⁇ , ⁇ , ⁇ , and ⁇ ), CD4, or CD8 as an auxiliary molecule.
- TCR ⁇ and TCR ⁇ have a variable region (V region + J region) and a constant region (C region).
- the V region in the variable region contains a complementarity determining region (CDR).
- TCR can be characterized by the amino acid sequence of the V region (including the CDR region) or the V region and J region in TCR ⁇ and TCR ⁇ .
- the TCR of the present invention is characterized by having an ⁇ chain CDR3 region consisting of the amino acid sequence shown in SEQ ID NO:3 or an amino acid sequence resulting from the amino acid sequence by substitution, deletion or addition of 1 to 3 amino acids, and a ⁇ chain CDR3 region consisting of the amino acid sequence shown in SEQ ID NO:8 or an amino acid sequence resulting from the amino acid sequence by substitution, deletion or addition of 1 to 3 amino acids.
- the amino acid sequence obtained by substituting, deleting or adding 1 to 3 amino acids to the amino acid sequence may be an amino acid sequence having 95% or more identity with the amino acid sequence, more preferably an amino acid sequence having 97% or more identity with the amino acid sequence, and even more preferably an amino acid sequence having 99% or more identity with the amino acid sequence.
- the TCR of the present invention preferably has an ⁇ chain CDR3 region consisting of the amino acid sequence shown in SEQ ID NO:3, and a ⁇ chain CDR3 region consisting of the amino acid sequence shown in SEQ ID NO:8.
- the TCR of the present invention preferably further comprises an ⁇ chain L region consisting of the amino acid sequence shown in SEQ ID NO:1 or an amino acid sequence resulting from the amino acid sequence by substitution, deletion or addition of 1 to 3 amino acids, and a ⁇ chain L region consisting of the amino acid sequence shown in SEQ ID NO:6 or an amino acid sequence resulting from the amino acid sequence by substitution, deletion or addition of 1 to 3 amino acids.
- the amino acid sequence obtained by substituting, deleting or adding 1 to 3 amino acids to the amino acid sequence may be an amino acid sequence having 95% or more identity with the amino acid sequence, more preferably an amino acid sequence having 97% or more identity with the amino acid sequence, and even more preferably an amino acid sequence having 99% or more identity with the amino acid sequence.
- the TCR of the present invention has an ⁇ chain CDR3 region consisting of the amino acid sequence shown in SEQ ID NO: 3, an ⁇ chain L region consisting of the amino acid sequence shown in SEQ ID NO: 1, a ⁇ chain CDR3 region consisting of the amino acid sequence shown in SEQ ID NO: 8, and a ⁇ chain L region consisting of the amino acid sequence shown in SEQ ID NO: 6.
- the TCR of the present invention has, in addition to the ⁇ chain CDR3 region, the ⁇ chain L region, the ⁇ chain CDR3 region, and the ⁇ chain L region, an ⁇ chain V region consisting of the amino acid sequence shown in SEQ ID NO: 2 or an amino acid sequence obtained by substituting, deleting or adding 1 to 3 amino acids to said amino acid sequence, and a ⁇ chain V region consisting of the amino acid sequence shown in SEQ ID NO: 7 or an amino acid sequence obtained by substituting, deleting or adding 1 to 3 amino acids to said amino acid sequence.
- amino acid sequence obtained by substituting, deleting or adding 1 to 3 amino acids to the amino acid sequence may be an amino acid sequence having 95% or more identity with the amino acid sequence, more preferably an amino acid sequence having 97% or more identity with the amino acid sequence, and even more preferably an amino acid sequence having 99% or more identity with the amino acid sequence.
- the TCR of the present invention has an ⁇ chain CDR3 region consisting of the amino acid sequence shown in SEQ ID NO: 3, an ⁇ chain L region consisting of the amino acid sequence shown in SEQ ID NO: 1, an ⁇ chain V region consisting of the amino acid sequence shown in SEQ ID NO: 2, a ⁇ chain CDR3 region consisting of the amino acid sequence shown in SEQ ID NO: 8, a ⁇ chain L region consisting of the amino acid sequence shown in SEQ ID NO: 6, and a ⁇ chain V region consisting of the amino acid sequence shown in SEQ ID NO: 7.
- the TCR of the present invention has, in addition to the ⁇ chain CDR3 region, the ⁇ chain L region, the ⁇ chain CDR3 region, the ⁇ chain V region, the ⁇ chain L region, and the ⁇ chain V region, an ⁇ chain J region consisting of the amino acid sequence shown in SEQ ID NO:4 or an amino acid sequence obtained by substituting, deleting or adding 1 to 3 amino acids to said amino acid sequence, and a ⁇ chain J region consisting of the amino acid sequence shown in SEQ ID NO:9 or an amino acid sequence obtained by substituting, deleting or adding 1 to 3 amino acids to said amino acid sequence.
- amino acid sequence obtained by substituting, deleting or adding 1 to 3 amino acids to the amino acid sequence may be an amino acid sequence having 95% or more identity with the amino acid sequence, more preferably an amino acid sequence having 97% or more identity with the amino acid sequence, and even more preferably an amino acid sequence having 99% or more identity with the amino acid sequence.
- the TCR of the present invention has an ⁇ chain CDR3 region consisting of the amino acid sequence shown in SEQ ID NO: 3, an ⁇ chain L region consisting of the amino acid sequence shown in SEQ ID NO: 1, an ⁇ chain V region consisting of the amino acid sequence shown in SEQ ID NO: 2, an ⁇ chain J region consisting of the amino acid sequence shown in SEQ ID NO: 4, a ⁇ chain CDR3 region consisting of the amino acid sequence shown in SEQ ID NO: 8, a ⁇ chain L region consisting of the amino acid sequence shown in SEQ ID NO: 6, a ⁇ chain V region consisting of the amino acid sequence shown in SEQ ID NO: 7, and a ⁇ chain J region consisting of the amino acid sequence shown in SEQ ID NO: 9.
- Functional fragments of the TCR of the present invention include polypeptides having the ⁇ chain CDR3 region and the ⁇ chain CDR3 region, polypeptides having the ⁇ chain CDR3 region, the ⁇ chain L region, the ⁇ chain CDR3 region, and the ⁇ chain L region, polypeptides having the ⁇ chain CDR3 region, the ⁇ chain L region, the ⁇ chain V region, the ⁇ chain CDR3 region, the ⁇ chain L region, and the ⁇ chain V region, polypeptides having the ⁇ chain CDR3 region, the ⁇ chain L region, the ⁇ chain V region, the ⁇ chain J region, the ⁇ chain CDR3 region, the ⁇ chain L region, the ⁇ chain V region, and the ⁇ chain J region, and combinations of these polypeptides.
- the TCR of the present invention can be obtained, for example, by inducing HPV16E6-specific cytotoxic T cells from peripheral blood of a patient or a healthy individual, and then performing single cell cloning to establish an HPV16E6-specific cytotoxic T cell clone.
- the subjects may be either healthy individuals or cervical cancer patients.
- the T cells induced to T-iPS cells are preferably T cells having HPV16E6 specificity.
- T cells expressing CD3 and CD8, specifically CTLs which are CD8 positive cells can be mentioned.
- T cells expressing CD3 and CD4, specifically T cells which are CD4 positive cells can be mentioned.
- the antigen specificity in T cells is brought about by antigen-specific rearranged TCR genes. From the viewpoint of production efficiency, it is preferable to use antigen-specific CD8 positive T cells as human T cells induced to T-iPS cells in order to obtain antigen-specific CD8 positive cells, although this is not particularly limited. In addition, when performing immunotherapy, it is preferable that human T cells differentiated from iPS cells have the same or substantially the same antigen specificity as human T cells induced to iPS cells. In addition, T cells that induce T-iPS cells also include T cells without antigen specificity. Specific examples include genetically modified T cells such as CAR T cells or TCR-T cells.
- T cells can be isolated, for example, from human tissues by known methods.
- human tissues include tissues containing the T cells, such as peripheral blood, lymph nodes, bone marrow, thymus, spleen, umbilical cord blood, and diseased tissue.
- peripheral blood is preferred from the viewpoints of low invasiveness to humans and ease of preparation.
- Tumor-infiltrating lymphocytes TILs
- Known methods for isolating human T cells include, for example, magnetic selection using magnetic beads for cell separation, flow cytometry using antibodies against cell surface markers such as CD4 or CD8 and a cell sorter, and activated T cell induction methods using anti-CD3 antibodies and anti-CD28 antibodies.
- the desired T cells can be isolated using the secretion of cytokines, the expression of functional molecules, or signal molecules such as PD-1 as indicators.
- cytotoxic T cells CTLs
- TTLs can be isolated using the secretion or production of granzymes and perforins as indicators.
- T cells with the desired antigen specificity can be purified from human tissues using a polymerized MHC (major histocompatibility complex) bound to the desired antigen (e.g., "MHC tetramer” or "Pro5 (registered trademark) MHC class I pentamer”).
- the genes introduced to convert T cells into iPS cells are preferably a combination of at least four types of genes from among (a) the Oct3/4 gene, (b) the c-Myc gene, (c) the Sox2 gene, (d) the Klf4 gene, (e) the NANOG gene, and (f) the LIN28 gene.
- the method for introducing the gene group into T cells is not particularly limited, and any known method can be appropriately selected and used.
- the nucleic acid e.g., cDNA, RNA
- the expression vector can be introduced into cells by infection, lipofection, liposome, electroporation, calcium phosphate coprecipitation, DEAE-dextran, microinjection, or electroporation.
- Stealth RNA expression vectors are vectors designed to avoid vector entry into chromosomes and to continuously and stably express genes in the cytoplasm, not in the nucleus. They can be used to introduce large genes of 13,000 base pairs or more, or to simultaneously introduce 10 genes, without damaging cells, and can be removed when the introduced gene is not needed. They have stealth properties that prevent cells from recognizing the vector as a foreign body.
- RNA expression vectors include complexes that do not activate innate immune structures and that consist of a minus single-stranded RNA (A) containing any of the RNA sequences (1) to (8) below, a single-stranded RNA-binding protein (B), and an RNA-dependent RNA polymerase.
- A minus single-stranded RNA
- B single-stranded RNA-binding protein
- RNA sequence for the group of genes (2) a human mRNA-derived RNA sequence constituting a non-coding region; (3) a transcription initiation signal sequence recognized by the RNA-dependent RNA synthetase; (4) a transcription termination signal sequence recognized by the RNA-dependent RNA synthetase; (5) an RNA sequence including a replication origin recognized by the RNA-dependent RNA synthetase; (6) an RNA sequence encoding the RNA-dependent RNA synthetase; (7) An RNA sequence encoding a protein that regulates the activity of the RNA-dependent RNA synthetase. (8) An RNA sequence encoding the single-stranded RNA-binding protein.
- the T cells are preferably stimulated and activated with anti-CD3 antibody and anti-CD28 antibody in the presence of interleukin-2 (IL-2) or interleukin-7 (IL-7) and interleukin-15 (IL-15) before the introduction of the group of genes, and may be stimulated and activated with at least one substance selected from the group consisting of phytohemagglutinin (PHA), interleukin-2 (IL-2), alloantigen-expressing cells, anti-CD3 antibody, anti-CD28 antibody, CD3 and CD28 agonists.
- PHA phytohemagglutinin
- IL-2 interleukin-2
- alloantigen-expressing cells anti-CD3 antibody, anti-CD28 antibody, CD3 and CD28 agonists.
- Such stimulation can be performed, for example, by adding PHA, IL-2, anti-CD3 antibody and/or anti-CD28 antibody, etc.
- the anti-CD3 and anti-CD28 antibodies may be bound to magnetic beads, and instead of adding these antibodies to the medium, the T cells may be stimulated by culturing them for a certain period of time on a culture dish with anti-CD3 and anti-CD28 antibodies bound to the surface.
- the T cells e.g., human T cells
- the T cells may be stimulated by adding an antigen peptide recognized by the T cells (e.g., human T cells) to the medium together with feeder cells.
- the concentration of PHA added to the culture medium is not particularly limited, but is preferably 1 to 100 ⁇ g/mL.
- concentration of IL-2 added to the culture medium is not particularly limited, but is preferably 1 to 200 ng/mL.
- the concentrations of anti-CD3 antibody and anti-CD28 antibody added to the culture medium are not particularly limited, but are preferably 1 to 10 times the culture volume of the T cells.
- the concentrations of anti-CD3 antibody and anti-CD28 antibody bound to the surface of the culture dish are not particularly limited, but the concentration at the time of coating is preferably 0.1 to 100 ⁇ g/mL, preferably 1 to 100 ⁇ g/mL, for anti-CD3 antibody and 0.1 to 10 ⁇ g/mL for anti-CD28 antibody.
- the culture period for such stimulation is not particularly limited as long as it is a period sufficient to provide such stimulation to the T cells and to proliferate the T cells to the number of cells required for the introduction of the four genes. It is usually 2 to 7 days, but from the viewpoint of gene introduction efficiency, it is preferably 3 to 5 days. It is preferable to infect the T cells by mixing them with the vector in a 15 mL tube, or to culture them on a culture dish coated with Retronectin from the viewpoint of increasing gene introduction efficiency.
- a medium for culturing the T cells and adding PHA, IL-2, anti-CD3 antibody, and/or anti-CD28 antibody, etc. a known medium suitable for culturing the T cells, more specifically, Roswell Park Memorial Institute (RPMI) 1640 medium, AIM V TM medium, and NS-A2 containing other cytokines and human serum, can be used.
- RPMI Roswell Park Memorial Institute
- amino acids necessary for culturing e.g., L-glutamine
- antibiotics e.g., streptomycin, penicillin
- IL-7 and IL-15 may be added to the medium instead of IL-2.
- concentration of IL-7 and IL-15 added is 1 to 100 ng/mL.
- the conditions when or after introducing the four genes into the T cells there are no particular limitations on the conditions when or after introducing the four genes into the T cells, but it is preferable to culture the T cells into which the four genes have been introduced under feeder-free conditions.
- Examples include a solution of iMatrix-511, which is a laminin 511E8 fragment, or wells coated with vitronectin. They can also be established by culturing under feeder cell conditions.
- feeder cells include mouse embryonic fibroblasts (MEF), STO cells, and SNL cells whose cell division has been stopped by irradiation or antibiotic treatment.
- iPS cell medium from the next day. After that, it is preferable to replace the medium by half every other day, gradually replacing the T cell medium with iPS medium.
- a known medium suitable for culturing T cells with a medium suitable for culturing iPS cells as the T cells transition to iPS cells.
- a known medium can be appropriately selected and used as a medium suitable for culturing such iPS cells.
- feeder cells such as MEF cells, Dulbecco's modified Eagle medium/F12 medium (human iPS cell medium) containing knockout serum substitute, L-glutamine, non-essential amino acids, 2-mercaptoethanol, b-FGF, etc. is preferable.
- the T-iPS cells thus obtained can be selected by appropriately selecting a known method.
- One such known method is, for example, a method of selecting by observing the morphology of ES cell/iPS cell-like colonies under a microscope.
- the properties are often similar, so a method can be used in which all established colonies are passaged as is without selecting each colony of T-iPS cells.
- the cells selected in this manner are T-iPS cells by, for example, detecting the expression of undifferentiated cell-specific markers (ALP, SSEA-4, Tra-1-60, Tra-1-81, etc.) in the selected cells by immunostaining, RT-PCR, etc., or by transplanting the selected cells into mice and observing the formation of teratomas. It can also be confirmed that the cells selected in this manner are derived from the T cells by detecting the state of TCR gene rearrangement by RT-PCR.
- the time to select and recover these cells is preferably 10 to 40 days, preferably 14 to 28 days, after the gene group including the four genes is introduced into the T cells.
- the culture environment is preferably 5% CO2 , 35 to 38°C, more preferably 37°C, unless otherwise specified above.
- HPV16E6-specific CTL cells are induced to differentiate from the established T-iPS cells.
- a method for inducing redifferentiation a method in which T-iPS cells are differentiated into CD8+ single positive T cells is preferable, and a method in which T-iPS cells are differentiated into CD4/CD8 double negative T cells and then the CD4/CD8 double negative T cells are differentiated into CD8+ single positive T cells is more preferable.
- the cells by differentiating T-iPS cells into CD4/CD8 double negative cells, stimulating the CD4/CD8 double negative cells by adding a substance that stimulates the T cell receptor, and then differentiating the CD4/CD8 double negative cells whose T cell receptors have been stimulated into CD8 single positive T cells in the presence of cytokines IL-7 and IL-15.
- T-iPS cells To differentiate T-iPS cells into CD4/CD8 double negative cells, it is preferable to culture T-iPS cells on feeder cells (preferably mouse stromal cells) in a medium containing cytokines, serum (e.g., fetal bovine serum (FBS)), insulin, transferrin, sodium selenite, L-glutamine, ⁇ -monothioglycerol, ascorbic acid, and the like.
- the stromal cells used are preferably OP9 cells or 10T1/2 cells (C3H10T1/2 cells) that have been treated with radiation, etc.
- the cytokine added to the medium is preferably at least one cytokine selected from the group consisting of VEGF, SCF, TPO, and FLT3L, and more preferably VEGF, SCF and TPO, or VEGF, SCF and FLT3L.
- the medium include X-VIVO medium, Iscove's modified Dulbecco's medium (IMDM medium), ⁇ -MEM, and DMEM, with IMDM medium being preferred in terms of facilitating the formation of T-iPS sacs (sac-shaped structures containing hematopoietic progenitor cells).
- the culture period of the T-iPS cells is preferably 8 to 14 days, more preferably 10 to 14 days, from the start of the culture of the T-iPS cells.
- the culture environment is not particularly limited, but is preferably 5% CO 2 , 35 to 38° C., more preferably 37° C. In addition, it is more preferred to culture the cells for about one week under low oxygen concentration conditions (oxygen concentration: for example, 5 to 20%).
- T-iPS cells In order to differentiate T-iPS cells into CD4/CD8 double negative cells, it is preferable to further culture the cells contained in the T-iPS sac on feeder cells (preferably stromal cells, more preferably human stromal cells) in a medium containing cytokines and serum (e.g., FBS), etc., using a cytokine-coated well under feeder-free conditions.
- feeder cells preferably stromal cells, more preferably human stromal cells
- a medium containing cytokines and serum e.g., FBS
- the cells present inside the T-iPS sac can be separated, for example, by passing them through a sterilized sieve-like device (e.g., a cell strainer, etc.).
- the stromal cells used in this culture are preferably OP9-DL1 cells, OP9-DL4 cells, 10T1/2/DL4 cells, or 10T1/2/DL1 cells that have been treated with radiation or the like.
- cytokines added to the medium include IL-7, FLT3L, VEGF, SCF, TPO, IL-2, and IL-15.
- media include ⁇ -MEM medium, DMEM medium, and IMDM medium, with ⁇ -MEM medium being preferred.
- the medium may also contain amino acids (e.g., L-glutamine) and antibiotics (e.g., streptomycin and penicillin) necessary for culture.
- the culture period of the cells contained in the T-iPS sac is preferably the period until the T cell receptor (TCR) is expressed on the cell surface of the CD4/CD8 double negative cells obtained by differentiation in this manner, and is preferably 14 to 28 days from the start of culture of the cells contained in the T-iPS sac.
- TCR T cell receptor
- T cell receptors TCR
- CD4/CD8 double negative cells T cell receptors
- further rearrangement of the TCRA gene can be suppressed by stimulating CD4/CD8 double negative cells derived from T-iPS cells via the TCR expressed on the cell surface, and as a result, the frequency of T cells with the same TCR gene rearrangement pattern as the original human T cell can be extremely increased in the CD8 single positive cells obtained by redifferentiation.
- a preferred method for stimulating the T cell receptor of CD4/CD8 double negative cells derived from T-iPS cells is to contact the T-iPS cell-derived CD4/CD8 double negative cells with at least one substance selected from the group consisting of anti-CD3 antibodies, anti-CD28 antibodies, antigen peptides that specifically bind to the human T cells from which the T-iPS cells were derived, cells expressing a complex with HLA that exhibits restriction to the T cell receptor, and MHC multimers to which the antigen peptide is bound.
- a more preferred method is to contact the cells expressing a specific peptide/HLA complex.
- a more preferred method is to contact the cells with an antibody or reagent.
- the contact can be achieved, for example, by adding PHA or the like to the medium and culturing the T cells for a certain period of time.
- the anti-CD3 antibody and the anti-CD28 antibody may be bound to magnetic beads or the like, and instead of adding these antibodies to the medium, the T cells may be stimulated by culturing them for a certain period of time on a culture dish with anti-CD3 antibody and anti-CD28 antibody bound to the surface.
- the antigen peptide may be added to the medium together with the feeder cells to stimulate the T cells.
- the concentration of PHA added to the culture medium to stimulate the TCR of CD4/CD8 double negative cells is preferably 1 to 100 ⁇ g/ml.
- the concentrations of anti-CD3 and anti-CD28 antibodies added to the culture medium are preferably 1 to 10 times the culture volume of the T cells.
- the concentrations of anti-CD3 and anti-CD28 antibodies bound to the surface of the culture dish to stimulate the TCR of CD4/CD8 double negative cells are preferably 0.1 to 100 ⁇ g/ml for anti-CD3 antibodies and 0.1 to 10 ⁇ g/ml for anti-CD28 antibodies at the time of coating.
- the culture period of the cells contained in the T-iPS sac preferably includes the period required for the expression of T cell receptors (TCR) on the cell surface of the CD4/CD8 double negative cells thus differentiated, and is preferably 7 to 29 days from the start of culture of the cells contained in the T-iPS sac.
- the culture environment is preferably 5% CO2 , 35 to 38°C, more preferably 37°C.
- the CD4/CD8 double negative cells in order to differentiate CD4/CD8 double negative cells whose T cell receptors have been stimulated into CD8 single positive cells, it is preferable to culture the CD4/CD8 double negative cells in a medium containing cytokines, serum (e.g., human serum), and the like.
- the cytokines added to the medium may be any cytokine capable of differentiating CD4/CD8 double negative cells into CD8 single positive cells, and examples of such cytokines include IL-7 and IL-15. Of these, it is preferable to add IL-7 and IL-15 in combination, from the viewpoint of selecting the CD8 lineage and facilitating the generation of memory CD8+ T cells in the differentiation into CD8 single positive cells.
- the concentrations of IL-7 and IL-15 added are preferably 1 to 20 ng/ml.
- the medium include RPMI-1640 medium, X-VIVO medium, DMEM medium, and ⁇ -MEM medium, with RPMI-1640 medium or X-VIVO medium being preferred.
- the medium may also contain amino acids necessary for culture (e.g., L-glutamine), antibiotics (e.g., streptomycin, penicillin), and cytokines other than IL-7, IL-15, etc.
- the CD4/CD8 double negative cells may be co-cultured with feeder cells.
- the feeder cells are preferably peripheral blood mononuclear cells (PBMCs).
- PBMCs peripheral blood mononuclear cells
- Such PBMCs are preferably in an allogeneic (allogeneic) relationship with the CD4/CD8 double negative cells. From the viewpoint of continuously stimulating the TCR and continuously suppressing further rearrangement of the TCR, it is more preferable to use peripheral blood mononuclear cells that present an antigen peptide that specifically binds to the human T cells that are the source of the CD4/CD8 double negative cells.
- the culture period for differentiating the CD4/CD8 double negative cells into CD8 single positive cells is preferably 2 to 4 weeks, and the culture environment is preferably 5% CO 2 , 35 to 38°C, more preferably 37°C.
- the CD8 single positive cells induced to differentiate in this way are derived from T-iPS cells and from the T cells that gave rise to the T-iPS cells, for example, by detecting the state of TCR gene rearrangement using genomic PCR.
- the CD8 single positive cells thus obtained can be isolated by appropriately selecting a known method.
- One such known method is flow cytometry using an antibody against the CD8 cell surface marker and a cell sorter.
- the CD8 single positive cells obtained by the present invention do not express PD-1, but express CCR7 along with CD27 and CD28, which are representative of the phenotype of central memory T cells, and also have longer telomeres compared to the original T cells, giving them a high self-renewal ability. Therefore, according to the present invention, it is possible to produce CD8 single positive T cells that have the same TCR gene rearrangement pattern as the original T cells, do not express PD-1, and express CD27, CD28, and CCR7. Furthermore, T cells collected from humans differ from the obtained T cells in that they express PD-1 and have a low proportion of juvenile memory phenotypes.
- the cells may be stimulated every 1 to 2 weeks.
- Such stimulation may include contact with at least one substance selected from the group consisting of anti-CD3 antibody, anti-CD28 antibody, IL-2, IL-7, IL-15, an antigen recognized by the CD8 single positive cells, an MHC multimer to which the antigen is bound, a feeder cell in an allo-relationship with the CD8 single positive cells, and a feeder cell in an auto-relationship with the CD8 single positive cells.
- MHC pentamers MHC tetramers, etc. are used to confirm that they retain the same antigen specificity as the original peripheral blood-derived CTLs. Furthermore, TCR sequence analysis was performed to identify TCR ⁇ .
- HPV16E6-specific cytotoxic T cells can also be produced by genetic recombination using a gene encoding the TCR of the present invention. That is, for example, the gene encoding the TCR of the present invention may be introduced into host T cells, and cells having HPV16E6-specific cytotoxicity may be selected. To introduce the gene encoding the TCR into host T cells, it is preferable to incorporate the gene into various viral vectors. The selection of cells having HPV16E6-specific cytotoxicity may be performed by confirming the above-mentioned HPV16E6-specific cytotoxic activity, or by detecting the ability to produce cytokines such as IFN- ⁇ .
- the obtained HPV16E6-specific cytotoxic T cells or T-iPS cells are useful as a pharmaceutical composition or a cellular medicine.
- the obtained HPV16E6-specific cytotoxic T cells or T-iPS cells have excellent HPV-specific cytotoxic activity and are therefore useful as therapeutic agents, particularly for cervical cancer.
- the HPV16E6-specific cytotoxic T cells of the present invention the HPV16E6-specific cytotoxic T cells rich in tissue-resident memory T cells have particularly excellent HPV-specific cytotoxic activity, and are therefore useful as a therapeutic agent for cervical cancer.
- HPV16E6-specific cytotoxic T cells rich in tissue-resident memory T cells increase the production of cytocidal proteins by binding to the surface antigen CD103 of tissue-resident memory T cells and E-cadherin expressed in cervical cancer cells, and thus increase antigen binding, thereby exerting a strong antitumor effect.
- the presence of abundant tissue-resident memory T cells can be confirmed by multiple staining with dye-tagged antibodies that recognize CD3, CD8, CD62L, CCR7, CD103, and CD69, followed by flow cytometry.
- tissue-resident memory T cells being CD62L-, CCR7-, CD103+, or CD69+, and more preferably CD3+, CD8+ T cells being CD62L-, CCR7-, CD103+, and CD69+.
- the proportion of tissue-resident memory T cells is preferably at least 30%, more preferably 50% or more, even more preferably 60% or more, and even more preferably 70% or more.
- Another aspect of the present invention is a composition for treating cervical cancer, comprising HPV16E6-specific cytotoxic T cells or T-iPS cells having the above-mentioned T cell receptor or a functional fragment thereof.
- Another aspect of the present invention is use of HPV16E6-specific cytotoxic T cells or T-iPS cells having the T cell receptor or a functional fragment thereof for the production of a therapeutic agent for cervical cancer.
- Another aspect of the present invention is an HPV16E6-specific cytotoxic T cell or T-iPS cell having the T cell receptor or a functional fragment thereof for treating cervical cancer.
- a further aspect of the present invention is a method for treating cervical cancer, comprising administering HPV16E6-specific cytotoxic T cells or T-iPS cells having the above-mentioned T cell receptor or a functional fragment thereof.
- the pharmaceutical composition of the present invention may contain a pharma- ceutical acceptable carrier in addition to the T cells of the present invention.
- a pharma- ceutical acceptable carrier examples include physiological saline and Ringer's solution.
- the pharmaceutical composition of the present invention may contain known pharma- ceutical acceptable additives such as preservatives and colorants, if necessary.
- the pharmaceutical composition of the present invention is preferably in the form of an injection, and more preferably an injection for T cell infusion therapy.
- the pharmaceutical composition of the present invention is preferably used for infusion of T cells to a cervical cancer patient at intervals of several weeks.
- the pharmaceutical composition of the present invention is also useful for treating HPV 16-infected cells and HPV 16-positive cells, and is particularly useful for treating cancers caused by HPV 16 infection, such as anal cancer, pharynx cancer, vulva cancer, and penis cancer, in addition to cervical cancer.
- Example 1 Establishment of T-iPS cells from HPV16E6-specific CTL clones using Sendai virus vectors.
- A) SeV6 factor vector ((a) Oct3/4 gene, (b) c-Myc gene, (c) Sox2 gene, (d) Klf4 gene, (e) NANOG gene, and (f) LIN28 gene).
- Figures 1 to 3 show the results of tetramer staining of HPV16E6-CTL induced from peripheral blood, the established HPV16E6-specific CTL clone, and HPV16E6-CTL derived from iPS cells (HPV16E6-rejT).
- Example 2 Cytotoxicity Test The cytotoxic activity of HLA-edited HPV16 E6-rejT and HPV16E6-specific CTL clones against cervical cancer cell lines (SiHa, SKGIIIa) was compared by chromium release assay. As shown in Figure 4, when HPV16 E6 antigen peptide was added to the target cervical cancer cell lines (SiHa, SKGIIIa), cytotoxic activity was observed not only in HLA-edited HPV16 E6-rejT but also in the original peripheral blood-derived CTL. However, when HPV16 E6 antigen peptide was not added, cytotoxic activity was observed only in HLA-edited HPV16 E6-rejT. This confirmed the strong antigen recognition and cytocidal effect of HLA-edited HPV16 E6-rejT against cervical cancer cell lines (SiHa, SKGIIIa).
- HLA-edited HPV16E6-rejT Characteristics of HLA-edited HPV16E6-rejT To confirm the proportion of tissue-resident memory T cells of HLA-edited HPV16E6-rejT, they were multiplex stained with CD3, CD8, CD62L, CCR7, CD27, CD103, and CD69 and measured by flow cytometry. As shown in FIG. 6, it was revealed that the HLA-edited HPV16E6-rejT had an overwhelmingly higher proportion of tissue-resident memory T cells than the HPV16E6-specific CTL clone.
- cervical cancer cells (SiHa, SKGIIIa, C aski) highly express E-cadherin, which is an epithelial marker, and that the HLA-edited HPV16E6-rejT of the present invention, which is rich in tissue-resident memory T cells, increases the production of cytocidal proteins by binding the surface antigen CD103 of tissue-resident memory T cells to E-cadherin expressed in cervical cancer cells, thereby increasing antigen binding and exerting a strong antitumor effect.
- Example 3 The results of the analysis of the TCR sequence are shown in FIG. 8 (amino acid sequence) and FIG. 9 (base sequence).
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Abstract
Description
予防的HPVワクチンは高リスク型HPVによる初期感染を予防できるが、これらのワクチンは確立された癌に対しては有効ではない。早期では子宮全摘出術が適応となり、卵巣保存を行っても妊孕性を喪失させ、心血管疾患の長期リスクを増大させる。転移性及び再発した子宮頸癌は一般に治癒不能である。また、特に若年女性では、化学療法にきわめて抵抗性である(非特許文献1)。
子宮頸癌細胞はE6及びE7腫瘍タンパク質(腫瘍形成および癌細胞生存への寄与因子)を構成的に発現するため、E6及びE7は魅力的な治療標的である。
さらに本発明者は、組織常在性メモリーT細胞(Tissue resident memory T cell)を非常に多く含むHPV16E6-rejTの誘導に成功し、組織常在性メモリーT細胞の表面抗原CD103と子宮頸がん細胞に発現するE-cadherinとの結合により殺細胞蛋白の産生が増加し、抗原結合が増加して強力な抗腫瘍効果を発揮することを証明した。この組織常在性メモリーT細胞の豊富なHPV16E6-rejTをレパトア解析することにより、T細胞受容体(TCR)遺伝子の全配列を確認し、本発明を完成した。
[1]配列番号3で示されるアミノ酸配列又は当該アミノ酸配列に1~3個のアミノ酸が置換、欠失若しくは付加してなるアミノ酸配列からなるα鎖CDR3領域、及び配列番号8で示されるアミノ酸配列又は当該アミノ酸配列に1~3個のアミノ酸が置換、欠失若しくは付加してなるアミノ酸配列からなるβ鎖CDR3領域を有する、HPV16E6特異的細胞傷害性T細胞のT細胞受容体又はその機能的断片。
[2]配列番号3で示されるアミノ酸配列からなるα鎖CDR3領域、及び配列番号8で示されるアミノ酸配列からなるβ鎖CDR3領域を有する、[1]記載のT細胞受容体又はその機能性断片。
[3]さらに、配列番号1で示されるアミノ酸配列又は当該アミノ酸配列に1~3個のアミノ酸が置換、欠失若しくは付加してなるアミノ酸配列からなるα鎖L領域、及び配列番号6で示されるアミノ酸配列又は当該アミノ酸配列に1~3個のアミノ酸が置換、欠失若しくは付加してなるアミノ酸配列からなるβ鎖L領域を有する、[1]又は[2]記載のT細胞受容体又はその機能的断片。
[4]さらに、配列番号1で示されるアミノ酸配列からなるα鎖L領域、及び配列番号6で示されるアミノ酸配列からなるβ鎖L領域を有する、[1]又は[2]記載のT細胞受容体又はその機能的断片。
[5]さらに、配列番号2で示されるアミノ酸配列又は当該アミノ酸配列に1~3個のアミノ酸が置換、欠失若しくは付加してなるアミノ酸配列からなるα鎖V領域、及び配列番号7で示されるアミノ酸配列又は当該アミノ酸配列に1~3個のアミノ酸が置換、欠失若しくは付加してなるアミノ酸配列からなるβ鎖V領域を有する、[1]~[4]のいずれかに記載のT細胞受容体又はその機能的断片。
[6]さらに、配列番号2で示されるアミノ酸配列からなるα鎖V領域、及び配列番号7で示されるアミノ酸配列からなるβ鎖V領域を有する、[1]~[4]のいずれかに記載のT細胞受容体又はその機能的断片。
[7]さらに配列番号4で示されるアミノ酸配列又は当該アミノ酸配列に1~3個のアミノ酸が置換、欠失若しくは付加してなるアミノ酸配列からなるα鎖J領域、及び配列番号9で示されるアミノ酸配列又は当該アミノ酸配列に1~3個のアミノ酸が置換、欠失若しくは付加してなるアミノ酸配列からなるβ鎖J領域を有する、[1]~[6]のいずれかに記載のT細胞受容体又はその機能的断片。
[8]さらに、配列番号4で示されるアミノ酸配列からなるα鎖V領域、及び配列番号9で示されるアミノ酸配列からなるβ鎖J領域を有する、[1]~[6]のいずれかに記載のT細胞受容体又はその機能的断片。
[9][1]~[8]のいずれかに記載のT細胞受容体又はその機能的断片を有する細胞。
[10]HPV16E6特異的細胞傷害性T細胞である[9]記載の細胞。
[11][1]~[8]のいずれかに記載のT細胞受容体又はその機能的断片を有するiPS細胞。
[12]HPV16E6特異的細胞傷害性T-iPS細胞である[11]記載のiPS細胞。
[13][1]~[8]のいずれかに記載のT細胞受容体又はその機能的断片のDNAを含むベクター。
[14][1]~[8]のいずれかに記載のT細胞受容体又はその機能的断片を有するHPV16E6特異的細胞傷害性T細胞又はT-iPS細胞を含有する、医薬組成物。
[15]子宮頸がん治療用医薬組成物である[14]記載の医薬組成物。
[16][1]~[8]のいずれかに記載のT細胞受容体又はその機能的断片を有するHPV16E6特異的細胞傷害性T細胞を含有する、細胞性医薬品。
[17]子宮頸がん治療用細胞性医薬品である[16]記載の細胞性医薬品。
[18][1]~[8]のいずれかに記載のT細胞受容体又はその機能的断片を有するHPV16E6特異的細胞傷害性T細胞又はT-iPS細胞の、子宮頸がん治療薬製造のための使用。
[19]子宮頸がんを治療するための、[1]~[8]のいずれかに記載のT細胞受容体又はその機能的断片を有するHPV16E6特異的細胞傷害性T細胞又はT-iPS細胞。
[20][1]~[8]のいずれかに記載のT細胞受容体又はその機能的断片を有するHPV16E6特異的細胞傷害性T細胞又はT-iPS細胞を投与することを特徴とする、子宮頸がんの治療方法。
[21]組織常在性メモリーT細胞を含むことを特徴とする、HPV16E6特異的細胞傷害性T細胞又はT-iPS細胞。
[22]組織常在性メモリーT細胞を含むことを特徴とする、HPV16E6特異的細胞傷害性T細胞又はT-iPS細胞を含む医薬組成物。
[23]組織常在性メモリーT細胞を含むことを特徴とする、HPV16E6特異的細胞傷害性T細胞又はT-iPS細胞を含む細胞性医薬品。
[24]表面抗原がCD3+、CD8+、CD62L-、CCR7-、CD103+又はCD69+であるT細胞を含むことを特徴とする、HPV16E6特異的細胞傷害性T細胞又はT-iPS細胞。
[25]表面抗原がCD3+、CD8+、CD62L-、CCR7-、CD103+又はCD69+であるT細胞を含むことを特徴とする、HPV16E6特異的細胞傷害性T細胞又はT-iPS細胞を含む医薬組成物。
[26]表面抗原がCD3+、CD8+、CD62L-、CCR7-、CD103+又はCD69+であるT細胞を含むことを特徴とする、HPV16E6特異的細胞傷害性T細胞又はT-iPS細胞を含む細胞性医薬品。
また、本発明の他の一態様は、HPV16E6特異的細胞傷害性T細胞のT細胞受容体又はその機能的断片であって、配列番号3で示されるアミノ酸配列又は当該アミノ酸配列に1~3個のアミノ酸が置換、欠失若しくは付加してなるアミノ酸配列からなるα鎖CDR3領域と、配列番号1で示されるアミノ酸配列又は当該アミノ酸配列に1~3個のアミノ酸が置換、欠失若しくは付加してなるアミノ酸配列からなるα鎖L領域と、配列番号8で示されるアミノ酸配列又は当該アミノ酸配列に1~3個のアミノ酸が置換、欠失若しくは付加してなるアミノ酸配列からなるβ鎖CDR3領域と、配列番号6で示されるアミノ酸配列又は当該アミノ酸配列に1~3個のアミノ酸が置換、欠失若しくは付加してなるアミノ酸配列からなるβ鎖L領域とを有することを特徴とする。
また、本発明の他の一態様は、HPV16E6特異的細胞傷害性T細胞のT細胞受容体又はその機能的断片であって、配列番号3で示されるアミノ酸配列又は当該アミノ酸配列に1~3個のアミノ酸が置換、欠失若しくは付加してなるアミノ酸配列からなるα鎖CDR3領域と、配列番号1で示されるアミノ酸配列又は当該アミノ酸配列に1~3個のアミノ酸が置換、欠失若しくは付加してなるアミノ酸配列からなるα鎖L領域と、配列番号2で示されるアミノ酸配列又は当該アミノ酸配列に1~3個のアミノ酸が置換、欠失若しくは付加してなるアミノ酸配列からなるα鎖V領域と、配列番号8で示されるアミノ酸配列又は当該アミノ酸配列に1~3個のアミノ酸が置換、欠失若しくは付加してなるアミノ酸配列からなるβ鎖CDR3領域と、配列番号6で示されるアミノ酸配列又は当該アミノ酸配列に1~3個のアミノ酸が置換、欠失若しくは付加してなるアミノ酸配列からなるβ鎖L領域と、配列番号7で示されるアミノ酸配列又は当該アミノ酸配列に1~3個のアミノ酸が置換、欠失若しくは付加してなるアミノ酸配列からなるβ鎖V領域とを有することを特徴とする。
また、本発明の他の一態様は、HPV16E6特異的細胞傷害性T細胞のT細胞受容体又はその機能的断片であって、配列番号3で示されるアミノ酸配列又は当該アミノ酸配列に1~3個のアミノ酸が置換、欠失若しくは付加してなるアミノ酸配列からなるα鎖CDR3領域と、配列番号1で示されるアミノ酸配列又は当該アミノ酸配列に1~3個のアミノ酸が置換、欠失若しくは付加してなるアミノ酸配列からなるα鎖L領域と、配列番号4で示されるアミノ酸配列又は当該アミノ酸配列に1~3個のアミノ酸が置換、欠失若しくは付加してなるアミノ酸配列からなるα鎖J領域と、配列番号2で示されるアミノ酸配列又は当該アミノ酸配列に1~3個のアミノ酸が置換、欠失若しくは付加してなるアミノ酸配列からなるα鎖V領域と、配列番号8で示されるアミノ酸配列又は当該アミノ酸配列に1~3個のアミノ酸が置換、欠失若しくは付加してなるアミノ酸配列からなるβ鎖CDR3領域と、配列番号6で示されるアミノ酸配列又は当該アミノ酸配列に1~3個のアミノ酸が置換、欠失若しくは付加してなるアミノ酸配列からなるβ鎖L領域と、配列番号7で示されるアミノ酸配列又は当該アミノ酸配列に1~3個のアミノ酸が置換、欠失若しくは付加してなるアミノ酸配列からなるβ鎖V領域と、配列番号9で示されるアミノ酸配列又は当該アミノ酸配列に1~3個のアミノ酸が置換、欠失若しくは付加してなるアミノ酸配列からなるβ鎖J領域とを有することを特徴とする。
TCRα及びTCRβは、可変領域(V領域+J領域)及び定常領域(C領域)を有している。なお、可変領域中のV領域には相補性決定領域(CDR)が存在する。従って、TCRは、TCRα及びTCRβ中のV領域(CDR領域を含む)、又はV領域及びJ領域のアミノ酸配列によって特徴づけることができる。
ここで、当該アミノ酸配列に1~3個のアミノ酸が置換、欠失若しくは付加してなるアミノ酸配列は、当該アミノ酸配列と95%以上の同一性を有するアミノ酸配列であってもよく、当該アミノ酸配列と97%以上の同一性を有するアミノ酸配列であるのがより好ましく、当該アミノ酸配列と99%以上の同一性を有するアミノ酸配列であるのがさらに好ましい。
本発明のTCRとしては、配列番号3で示されるアミノ酸配列からなるα鎖CDR3領域と、配列番号8で示されるアミノ酸配列からなるβ鎖CDR3領域とを有するのが好ましい。
ここで、当該アミノ酸配列に1~3個のアミノ酸が置換、欠失若しくは付加してなるアミノ酸配列は、当該アミノ酸配列と95%以上の同一性を有するアミノ酸配列であってもよく、当該アミノ酸配列と97%以上の同一性を有するアミノ酸配列であるのがより好ましく、当該アミノ酸配列と99%以上の同一性を有するアミノ酸配列であるのがさらに好ましい。
本発明のTCRとしては、配列番号3で示されるアミノ酸配列からなるα鎖CDR3領域と、配列番号1で示されるアミノ酸配列からなるα鎖L領域と、配列番号8で示されるアミノ酸配列からなるβ鎖CDR3領域と、配列番号6で示されるアミノ酸配列からなるβ鎖L領域とを有することがより好ましい。
ここで、当該アミノ酸配列に1~3個のアミノ酸が置換、欠失若しくは付加してなるアミノ酸配列は、当該アミノ酸配列と95%以上の同一性を有するアミノ酸配列であってもよく、当該アミノ酸配列と97%以上の同一性を有するアミノ酸配列であるのがより好ましく、当該アミノ酸配列と99%以上の同一性を有するアミノ酸配列であるのがさらに好ましい。
本発明のTCRは、配列番号3で示されるアミノ酸配列からなるα鎖CDR3領域と、配列番号1で示されるアミノ酸配列からなるα鎖L領域と、配列番号2で示されるアミノ酸配列からなるα鎖V領域と、配列番号8で示されるアミノ酸配列からなるβ鎖CDR3領域と、配列番号6で示されるアミノ酸配列からなるβ鎖L領域と、配列番号7で示されるアミノ酸配列からなるβ鎖V領域とを有することがより好ましい。
ここで、当該アミノ酸配列に1~3個のアミノ酸が置換、欠失若しくは付加してなるアミノ酸配列は、当該アミノ酸配列と95%以上の同一性を有するアミノ酸配列であってもよく、当該アミノ酸配列と97%以上の同一性を有するアミノ酸配列であるのがより好ましく、当該アミノ酸配列と99%以上の同一性を有するアミノ酸配列であるのがさらに好ましい。
本発明のTCRは、配列番号3で示されるアミノ酸配列からなるα鎖CDR3領域と、配列番号1で示されるアミノ酸配列からなるα鎖L領域と、配列番号2で示されるアミノ酸配列からなるα鎖V領域と、配列番号4で示されるアミノ酸配列からなるα鎖J領域と、配列番号8で示されるアミノ酸配列からなるβ鎖CDR3領域と、配列番号6で示されるアミノ酸配列からなるβ鎖L領域と、配列番号7で示されるアミノ酸配列からなるβ鎖V領域と、配列番号9で示されるアミノ酸配列からなるβ鎖J領域とを有することがより好ましい。
末梢血からHPV16E6特異的細胞傷害性T細胞を誘導するには、健常人であっても、子宮頸がん患者であってもよい。
本発明においてT-iPS細胞に誘導されるT細胞は、HPV16E6特異性を有するT細胞が好ましい。例えば、CD3及びCD8が発現しているT細胞であり、具体的にはCD8陽性細胞であるCTLが挙げられる。また、例えばCD3及びCD4が発現しているT細胞であり、具体的にはCD4陽性細胞であるT細胞が挙げられる。なお、T細胞における抗原特異性は、抗原特異的な、再構成されたTCR遺伝子によりもたらされる。なお、製造効率の観点からは、特にこれに限定されないが、抗原特異的CD8陽性細胞を得るためには、T-iPS細胞へ誘導されるヒトT細胞としては、抗原特異的CD8陽性T細胞を用いることが好ましい。また、免疫療法を実施する場合、iPS細胞から分化させるヒトT細胞は、iPS細胞へ誘導されるヒトT細胞と抗原特異性が同一または実質的に同一であることが好ましい。また、T-iPS細胞を誘導するT細胞として、抗原特異性のないT細胞も含まれる。具体的にはCART細胞もしくはTCR-T細胞など遺伝子改変T細胞が挙げられる。
ステルス型RNA発現ベクターとは、ベクターが染色体に入ることを回避し、核内ではなく細胞質内で、持続的で安定して遺伝子が発現するように設計されたベクターである。1万3000塩基対以上の大きな遺伝子の導入や、10個の遺伝子の同時導入もでき、細胞に傷害を与えず、導入遺伝子が不要な時には除去が可能で、細胞がベクターを異物として認識できないステルス性を持っている。
このようなステルス型RNA発現ベクターとしては、下記(1)~(8)のRNA配列を含むマイナス一本鎖RNA(A)と、一本鎖RNA結合タンパク質(B)、RNA依存性RNA合成酵素からなり、自然免疫構造を活性化させない複合体が挙げられる。
(1)前記遺伝子群に対するRNA配列、
(2)非コード領域を構成するヒトmRNA由来RNA配列、
(3)前記RNA依存性RNA合成酵素が認識する転写開始シグナル配列、
(4)前記RNA依存性RNA合成酵素が認識する転写終結シグナル配列、
(5)前記RNA依存性RNA合成酵素が認識する複製起点を含むRNA配列、
(6)前記RNA依存性RNA合成酵素をコードするRNA配列、
(7)前記RNA依存性RNA合成酵素の活性を調節するタンパク質をコードするRNA配列、
(8)前記一本鎖RNA結合タンパク質をコードするRNA配列。
この再分化誘導方法としては、T-iPS細胞を、CD8+シングルポジティブT細胞に分化させる方法が好ましく、T-iPS細胞を、CD4/CD8ダブルネガティブT細胞に分化させ、次いで当該CD4/CD8ダブルネガティブT細胞をCD8+シングルポジティブT細胞に分化させる方法がより好ましい。
更には、特許第6164746号公報記載のように、T-iPS細胞を、CD4/CD8ダブルネガティブ細胞に分化させ、T細胞受容体を刺激する物質を添加してCD4/CD8ダブルネガティブ細胞に刺激を与え、次いでT細胞受容体に刺激を与えた前記CD4/CD8ダブルネガティブ細胞を、IL-7及びIL-15のサイトカインの存在下でCD8シングルポジティブT細胞に分化させることにより得るのが好ましい。
用いるストローマ細胞としては、放射線照射等の処理を施したOP9細胞、10T1/2細胞(C3H10T1/2細胞)であることが好ましい。培地に添加されるサイトカインは、VEGF、SCF、TPO及びFLT3L群から選択される少なくとも1種のサイトカインであることが好ましく、VEGF、SCF及びTPO、又は、VEGF、SCF及びFLT3Lであることがより好ましい。
また、培地としては、例えば、X-VIVO培地、イスコフ改変ダルベッコ培地(IMDM培地)、α-MEM、DMEMが挙げられるが、T-iPSサック(造血前駆細胞を含有する袋状の構造物)を形成させやすくする点から、IMDM培地が好ましい。このT-iPS細胞の培養期間としては、T-iPS細胞の培養を開始してから好ましくは8~14日間、より好ましくは10~14日間である。培養環境としては、特に制限はないが、好ましくは、5%CO2、35~38℃、より好ましくは37℃の条件である。また、低酸素濃度条件(酸素濃度:例えば、5~20%)下にて1週間程度培養することがより好ましい。
HPV16E6特異的細胞傷害性を有する細胞の選択は、前記のHPV16E6特異的細胞傷害活性の確認でもよいし、IFN-γなどのサイトカインの産生能の検出でもよい。
得られたHPV16E6特異的細胞傷害性T細胞又はT-iPS細胞は、優れたHPV特異的細胞傷害活性を有するので、特に子宮頸がんの治療薬として有用である。
本発明のHPV16E6特異的細胞傷害性T細胞のうち、組織常在性メモリーT細胞を豊富に含むHPV16E6特異的細胞傷害性T細胞が、特に優れたHPV特異的細胞傷害活性を有するので、子宮頸がんの治療薬として有用である。組織常在性メモリーT細胞を豊富に含むHPV16E6特異的細胞傷害性T細胞は、組織常在性メモリーT細胞の表面抗原CD103と子宮頸がん細胞に発現するE-cadherinとの結合により殺細胞蛋白の産生が増加し、抗原結合が増加して強力な抗腫瘍効果を発揮することを確認した。
組織常在性メモリーT細胞を豊富に含むことは、CD3、CD8、CD62L、CCR7、CD103、CD69を認識する色素付きの抗体で多重染色してフローサイトメトリーにより確認することができる。ここで、豊富に含むとは、CD3+、CD8+であるT細胞がCD62L-、CCR7-、CD103+もしくはCD69+であることをいい、より好ましくはCD3+、CD8+であるT細胞がCD62L-、CCR7-、CD103+およびCD69+であることをいう。組織常在性メモリーT細胞の割合としては、少なくとも30%以上含むことが好ましく、50%以上であることがより好ましく、60%以上であることがさらに好ましく、70%以上含むことがよりさらに好ましい。
また、本発明の他の一態様は、前記のT細胞受容体又はその機能的断片を有するHPV16E6特異的細胞傷害性T細胞又はT-iPS細胞の、子宮頸がん治療薬製造のための使用である。
また、本発明の他の一態様は、子宮頸がんを治療するための、前記のT細胞受容体又はその機能的断片を有するHPV16E6特異的細胞傷害性T細胞又はT-iPS細胞である。
さらに本発明の一態様は、前記のT細胞受容体又はその機能的断片を有するHPV16E6特異的細胞傷害性T細胞又はT-iPS細胞を投与することを特徴とする、子宮頸がんの治療方法である。
本発明の医薬組成物の形態は、注射剤が好ましく、T細胞輸注療法用の注射剤が好ましい。本発明の医薬組成物は、子宮頸がん患者に対し、数週間間隔で、T細胞輸注するのが好ましい。
さらに本発明の医薬組成物は、HPV16感染細胞、HPV16陽性細胞の治療にも有用である。特にHPV16感染による癌として、子宮頸がん以外に、肛門、咽頭、外陰、陰茎などの癌の治療に有用である。
HPV16E6特異的CTLクローンよりセンダイウイルスベクターを用いてT-iPS細胞の樹立。
1)健常人末梢血より末梢血単核球を分離後、抗原提示目的に樹状細胞を誘導した。7日後、誘導した樹状細胞に抗原ペプチド(HPV16E6 49-57,A2402)を添加し末梢血単核球と共培養開始した。約8~10日後にHPV16E6特異的CTL検出のため、CTLをMHCテトラマーで染色後、フローサイトメトリーにてテトラマー陽性率を確認した。HPV16E6特異的CTLを確認後、シングルセルソート又はテトラマー/PEビーズセレクション後限界希釈法を行った。
A)SeV6因子ベクター((a)Oct3/4遺伝子、(b)c-Myc遺伝子、(c)Sox2遺伝子、(d)Klf4遺伝子、(e)NANOG遺伝子、及び(f)LIN28遺伝子)
4)7日後にT-iPS細胞のコロニーが観察でき、その後コロニーピックアップして拡大培養を行なった。
5)樹立したT-iPS細胞のHLAをCRISPR/Cas9技術でゲノム編集後、オフターゲット効果を慎重に除外した後にマスターセルバンクを作製した。
6)その後iPS細胞由来 rejuvenated HPV16E6-CTL(HPV16E6-rejT)を分化誘導した。
7)細胞傷害性試験を行うと元の末梢血CTLより強力に腫瘍細胞に抗原特異的細胞傷害活性を示すことができた。
1)細胞傷害性試験
HLA編集後HPV16 E6-rejTとHPV16E6特異的CTLクローンの子宮頸がん細胞株(SiHa、SKGIIIa)に対する細胞傷害活性をクロム放出試験によって比較した。
図4に示すように、標的となる子宮頸がん細胞株(SiHa、SKGIIIa)にHPV16 E6抗原ペプチドを添加した場合はHLA編集後HPV16 E6-rejTに加え元の末梢血由来CTLも細胞傷害活性を認めた。しかし、HPV16 E6抗原ペプチドを添加しなかった場合はHLA編集後HPV16 E6-rejTのみに細胞傷害活性を認めた。これにより、HLA編集後HPV16 E6-rejTの子宮頸がん細胞株(SiHa、SKGIIIa)に対する強力な抗原認識と殺細胞効果が確認された。
HLA編集後HPV16E6-rejTの細胞傷害性タンパク質の発現を確認するためにGranzyme B,Perforinの細胞内染色を行い、フローサイトメトリーで測定した。
図5に示すように、HLA編集後HPV16E6-rejTは、HPV16E6特異的CTLクローンと比較し、Granzyme B,Perforinを高発現することが明らかになった。
HLA編集後HPV16E6-rejTの組織常在性メモリーT細胞の割合を確認するためにCD3、CD8、CD62L、CCR7、CD27、CD103、CD69で多重染色してフローサイトメトリーにより測定した。
図6に示すように、HLA編集後HPV16E6-rejTは、HPV16E6特異的CTLクローンと比較し組織常在性メモリーT細胞の割合が圧倒的に多いことが明らかとなった。
子宮頸がん細胞(SiHa、SKGIIIa、C aski)が、上皮性マーカーであるE-cadherinを発現することを確認するために、表面抗原を色素付きの抗体で染色しフローサイトメトリーにより測定した。
図7に示すように、子宮頸がん細胞(SiHa、SKGIIIa、C aski)は上皮性マーカーであるE-cadherinを高発現することがわかり、本発明の組織常在性メモリーT細胞を豊富に含むHLA編集後HPV16E6-rejTは、組織常在性メモリーT細胞の表面抗原CD103と子宮頸がん細胞に発現するE-cadherinとの結合により殺細胞蛋白の産生が増加し、抗原結合が増加して強力な抗腫瘍効果を発揮することがわかった。
TCR配列の解析結果を、図8(アミノ酸配列)及び図9(塩基配列)に示す。
Claims (26)
- 配列番号3で示されるアミノ酸配列又は当該アミノ酸配列に1~3個のアミノ酸が置換、欠失若しくは付加してなるアミノ酸配列からなるα鎖CDR3領域、及び配列番号8で示されるアミノ酸配列又は当該アミノ酸配列に1~3個のアミノ酸が置換、欠失若しくは付加してなるアミノ酸配列からなるβ鎖CDR3領域を有する、HPV16E6特異的細胞傷害性T細胞のT細胞受容体又はその機能的断片。
- 配列番号3で示されるアミノ酸配列からなるα鎖CDR3領域、及び配列番号8で示されるアミノ酸配列からなるβ鎖CDR3領域を有する、請求項1に記載のT細胞受容体又はその機能性断片。
- さらに、配列番号1で示されるアミノ酸配列又は当該アミノ酸配列に1~3個のアミノ酸が置換、欠失若しくは付加してなるアミノ酸配列からなるα鎖L領域、及び配列番号6で示されるアミノ酸配列又は当該アミノ酸配列に1~3個のアミノ酸が置換、欠失若しくは付加してなるアミノ酸配列からなるβ鎖L領域を有する、請求項1に記載のT細胞受容体又はその機能的断片。
- さらに、配列番号1で示されるアミノ酸配列からなるα鎖L領域、及び配列番号6で示されるアミノ酸配列からなるβ鎖L領域を有する、請求項1に記載のT細胞受容体又はその機能的断片。
- さらに、配列番号2で示されるアミノ酸配列又は当該アミノ酸配列に1~3個のアミノ酸が置換、欠失若しくは付加してなるアミノ酸配列からなるα鎖V領域、及び配列番号7で示されるアミノ酸配列又は当該アミノ酸配列に1~3個のアミノ酸が置換、欠失若しくは付加してなるアミノ酸配列からなるβ鎖V領域を有する、請求項1に記載のT細胞受容体又はその機能的断片。
- さらに、配列番号2で示されるアミノ酸配列からなるα鎖V領域、及び配列番号7で示されるアミノ酸配列からなるβ鎖V領域を有する、請求項1に記載のT細胞受容体又はその機能的断片。
- さらに配列番号4で示されるアミノ酸配列又は当該アミノ酸配列に1~3個のアミノ酸が置換、欠失若しくは付加してなるアミノ酸配列からなるα鎖J領域、及び配列番号9で示されるアミノ酸配列又は当該アミノ酸配列に1~3個のアミノ酸が置換、欠失若しくは付加してなるアミノ酸配列からなるβ鎖J領域を有する、請求項1に記載のT細胞受容体又はその機能的断片。
- さらに、配列番号4で示されるアミノ酸配列からなるα鎖V領域、及び配列番号9で示されるアミノ酸配列からなるβ鎖J領域を有する、請求項1に記載のT細胞受容体又はその機能的断片。
- 請求項1~8のいずれか1項に記載のT細胞受容体又はその機能的断片を有する細胞。
- HPV16E6特異的細胞傷害性T細胞である請求項9記載の細胞。
- 請求項1~8のいずれか1項に記載のT細胞受容体又はその機能的断片を有するiPS細胞。
- HPV16E6特異的細胞傷害性T-iPS細胞である請求項11記載のiPS細胞。
- 請求項1~8のいずれか1項に記載のT細胞受容体又はその機能的断片のDNAを含むベクター。
- 請求項1~8のいずれか1項に記載のT細胞受容体又はその機能的断片を有するHPV16E6特異的細胞傷害性T細胞又はT-iPS細胞を含有する、医薬組成物。
- 子宮頸がん治療用医薬組成物である請求項14に記載の医薬組成物。
- 請求項1~8のいずれか1項に記載のT細胞受容体又はその機能的断片を有するHPV16E6特異的細胞傷害性T細胞を含有する、細胞性医薬品。
- 子宮頸がん治療用細胞性医薬品である請求項16に記載の細胞性医薬品。
- 請求項1~8のいずれか1項に記載のT細胞受容体又はその機能的断片を有するHPV16E6特異的細胞傷害性T細胞又はT-iPS細胞の、子宮頸がん治療薬製造のための使用。
- 子宮頸がんを治療するための、請求項1~8のいずれか1項に記載のT細胞受容体又はその機能的断片を有するHPV16E6特異的細胞傷害性T細胞又はT-iPS細胞。
- 請求項1~8のいずれか1項に記載のT細胞受容体又はその機能的断片を有するHPV16E6特異的細胞傷害性T細胞又はT-iPS細胞を投与することを特徴とする、子宮頸がんの治療方法。
- 組織常在性メモリーT細胞を含むことを特徴とする、HPV16E6特異的細胞傷害性T細胞又はT-iPS細胞。
- 組織常在性メモリーT細胞を含むことを特徴とする、HPV16E6特異的細胞傷害性T細胞又はT-iPS細胞を含む医薬組成物。
- 組織常在性メモリーT細胞を含むことを特徴とする、HPV16E6特異的細胞傷害性T細胞又はT-iPS細胞を含む細胞性医薬品。
- 表面抗原がCD3+、CD8+、CD62L-、CCR7-、CD103+又はCD69+であるT細胞を含むことを特徴とする、HPV16E6特異的細胞傷害性T細胞又はT-iPS細胞。
- 表面抗原がCD3+、CD8+、CD62L-、CCR7-、CD103+又はCD69+であるT細胞を含むことを特徴とする、HPV16E6特異的細胞傷害性T細胞又はT-iPS細胞を含む医薬組成物。
- 表面抗原がCD3+、CD8+、CD62L-、CCR7-、CD103+又はCD69+であるT細胞を含むことを特徴とする、HPV16E6特異的細胞傷害性T細胞又はT-iPS細胞を含む細胞性医薬品。
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