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2021 Fiscal Year Final Research Report

Affinity maturation of cancer-specific TCRs by in vitro cell display methods and their application to drug discovery.

Research Project

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Project/Area Number 18K07285
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 50020:Tumor diagnostics and therapeutics-related
Research InstitutionNagoya City University

Principal Investigator

OHTA RIEKO  名古屋市立大学, 医薬学総合研究院(医学), 研究員 (30452460)

Co-Investigator(Kenkyū-buntansha) 葛島 清隆  愛知県がんセンター(研究所), 腫瘍免疫応答研究分野, 分野長 (30311442)
今井 優樹  名古屋市立大学, 医薬学総合研究院(医学), 講師 (30440936)
岡村 文子 (出町文子)  愛知県がんセンター(研究所), 腫瘍免疫制御TR分野, 主任研究員 (10546948)
Project Period (FY) 2018-04-01 – 2022-03-31
KeywordsT細胞受容体 / 親和性の成熟 / がん特異的TCR / 膜侵襲複合体 / 補体
Outline of Final Research Achievements

In cancer patients, despite the expression of cancer-specific antigens in cancer tissue, serum antibody titers against cancer are low and the frequency of cancer-specific cytotoxic T cells (CTL, killer T cells) is low. In this study, we demonstrated the potential for in vitro affinity maturation of HLA-A24-restricted, which are present in approximately 60% of the Japanese population, cancer antigen-specific CTL clones using the 'method of TCR display system using 293T cells '. We were also able to construct a single chain variable fragment (scFv) that induces the formation of membrane attack complexes. Linking this scFv with high-affinity TCR mutants could lead to the development of new therapeutic reagents.

Free Research Field

医歯薬学

Academic Significance and Societal Importance of the Research Achievements

日本人の大多数が有するHLA拘束性のがん抗原を認識するCTLクローンのTCRから、抗原に高親和性のTCRが取得できれば、日本人に適した新たながんのターゲティングが可能になると考えられる。今回、「293T細胞ディスプレイ法」を用いて、一価での親和性が低いTCRについて、高親和性TCRの取得に成功した。今後、この技術が応用され、種々のがん抗原に対する高親和性TCR を用いた薬剤の創製に寄与すると考えられる

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Published: 2023-01-30  

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