2022 Fiscal Year Final Research Report
Donor derived neoantigens specific TCR-T therapy against multiple myeloma in preclinical model
Project/Area Number |
21K16278
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Research Category |
Grant-in-Aid for Early-Career Scientists
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Allocation Type | Multi-year Fund |
Review Section |
Basic Section 54010:Hematology and medical oncology-related
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Research Institution | Institute of Physical and Chemical Research |
Principal Investigator |
Okada Masahiro 国立研究開発法人理化学研究所, 生命医科学研究センター, 研究員 (30749479)
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Project Period (FY) |
2021-04-01 – 2023-03-31
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Keywords | neoantigens / TCR-T / single cell / multiple myeloma |
Outline of Final Research Achievements |
We proposed neoantigen-specific TCR gene therapy as the alternative therapeutic candidates for multiple myeloma by using xenograft model. We established the series of procedures for isolating, cloning, validating TCR repertoires from healthy donor-derived PBMCs. Since patients with multiple myeloma suffers from immune disorders due to chronic antigen exposure or insufficient hematopoiesis, anti-myeloma T cells is exhausted and limited for using neoantigens detection or therapeutic application such as immune checkpoint blockage therapy. By utilizing healthy donor-derived T cells which presumably cover wide range of patient-specific antigens, we successfully detected mutant antigen and corresponding TCR repertoire. Healthy donor-derived mutant antigen-specific TCR gene transfer augmented anti-myeloma activity. TCR-T cell therapy suppressed proliferation of multiple myeloma in xenograft model.
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Free Research Field |
がん免疫
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Academic Significance and Societal Importance of the Research Achievements |
多発性骨髄腫は、現在まで多くの治療法が開発されてきたものの、未だに治療抵抗性と高い再発率を有する難治性の血液がんであり、新たな代替治療戦略の開発が期待されている。ネオ抗原を標的とするTCR-T細胞移入療法は、すい臓がんや乳がんで有効性が明らかとなりつつあり、更なる応用が期待されている。私たちの研究により、免疫細胞の数が少ないがん患者によらずに、健常人の末梢血細胞を用いることで、がん患者特異的なネオ抗原を探索することが可能であること、またそこで取得されたTCR遺伝子配列を用いた細胞移入療法は、がん増殖を抑制できることを、多発性骨髄腫のモデルを用いて実験室レベルで証明することができた。
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