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Adoptive CTL therapy using neo-antigen-specific TCR-gene induced T cells

Research Project

Project/Area Number 21K08751
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 55020:Digestive surgery-related
Research InstitutionShiga University of Medical Science

Principal Investigator

Murata Satoshi  滋賀医科大学, 医学部, 講師 (90239525)

Co-Investigator(Kenkyū-buntansha) 住本 秀敏  滋賀医科大学, 医学部, 特任講師 (00306838)
下地 みゆき  滋賀医科大学, 医学部, 技術補佐員 (50796448)
谷 眞至  滋賀医科大学, 医学部, 教授 (60236677)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2023: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords免疫細胞治療 / TCR改変T細胞 / 腫瘍浸潤リンパ球 / 腫瘍ネオ抗原 / 免疫チェックポイント阻害剤 / T細胞補助刺激因子 / 癌免疫細胞療法 / ネオ抗原 / CTL / PDX / OX40 / TCR改変リンパ球 / 免疫チェックポイント阻害薬 / PDXマウス
Outline of Research at the Start

新規抗原(Neo-Ag)特異的細胞傷害性T細胞(CTL)を利用する養子免疫療法の有効性が小規模臨床研究で示されているが、Neo-Ag同定の非効率さやCTLの生体内での不活性化、腫瘍の免疫逃避機構の克服が課題である。独自開発した優れたNeo-Ag同定法とメモリーCTL培養技術をを基に、本研究は、患者由来Neo-Ag反応性T細胞受容体遺伝子で自己Tリンパ球を改変し、in vitroでOX40刺激により効率よくメモリー機能を付与させ、さらに腫瘍免疫逃避機構解除の抗PD-1薬を組み合わせた後にpatient-derived xenograft (PDX)マウスへ移入することにより抗腫瘍効果を証明する。
Neo-Agを利用した新しい個別化新規養子免疫細胞療法のプラットフォームが構築できる。

Outline of Final Research Achievements

We successfully created PDX (patient-derived xenograft) models by implanting surgically removed colon cancer, gastric cancer, and breast cancer tumors into immunodeficient mice. We identified somatic mutations in cancer tissues by sequencing DNA from both cancer and normal tissues of each patient. Through this, we found numerous mutant antigen peptides that have a high affinity to the patient's HLA-class I, making them Neo-Ag candidates. We further narrowed down these Neo-Ag peptides based on high lymphocyte reactivity using mass spectrometry. Additionally, we conducted an experiment where we introduced Flu-specific TCRαβ cDNA into human CD8+ T cells and evaluated the phenotype of the TCR-introduced T cells. We believe that combining this platform with PDX models can be an effective approach for the rapid development of adaptive immunotherapy.

Academic Significance and Societal Importance of the Research Achievements

患者腫瘍由来の高効率なNeo-Ag同定技術を基に、患者リンパ球由来のNeo-Ag特異的TCR導入CTLを樹立し、OX40刺激下培養によるメモリーCTL誘導技術、さらにICI治療を組み合わせ、独自性の高い高効率な養子免疫細胞療法の開発することにより、既存技術を超える新しいプラットフォームが構築でき、患者ネオ抗原を利用した個別化新規養子免疫細胞療法の臨床開発が可能になる。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (8 results)

All 2023 2021

All Presentation (8 results) (of which Int'l Joint Research: 2 results)

  • [Presentation] Development of adaptive cancer immunotherapy by NGS-based identification of neoantigen-specific T cell receptor genes2023

    • Author(s)
      Hidetoshi Sumimoto, Koji Terada, Yasutoshi Agata, Satoshi Murata, Yataro Daigo
    • Organizer
      JCA 2023 Annual Meeting
    • Related Report
      2023 Annual Research Report
  • [Presentation] NGS-based identification of NeoAgs with their corresponding TCRβ and its application to adaptive cancer immunotherapy2023

    • Author(s)
      Hidetoshi Sumimoto, Koji Terada, Yasutoshi Agata, Satoshi Murata, Yataro Daigo
    • Organizer
      The 27th Annual Meeting of Japanese Association of Cancer Immunology
    • Related Report
      2023 Annual Research Report
  • [Presentation] CD44+ cancer cells in the free peritoneal cavity and surgical manipulation as the cause of gastric cancer-derived peritoneal metastasis2021

    • Author(s)
      Andreas Michael Sihombing1, Satoshi Murata1,2, Miyuki Shimoji1, Sakura Nakao1, Katsushi Takebayashi1, Hirokazu Kodama1, Masatsugu Kojima1, Tomoyuki Ueki1, Naomi Kitamura3, Mina Kitamura1, Aya Tokuda1, Toru Miyake1, Eiji Mekata3, Masaji Tani1
    • Organizer
      JCA-AACR
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Characterization of Tumor-associated lymphocytes (TAL) in malignant ascites of immune-tolerant mice2021

    • Author(s)
      Miyuki Shimoji 1), Satoshi Murata 2), Masatsugu Kojima 1), Mina Kitamura 1), Andreas Michael Sihombing 1), Sakura Nakao 1), Naomi Kitamura 3), Tomoyuki Ueki 1), Katsushi Takebayashi 1), Hirokazu Kodama 1), Aya Tokuda 1), Toru Miyake 1), Eiji Mekata 3), Masaji Tani 1)
    • Organizer
      JCA-AACR
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Induction of tumor Ag-specific CTL using tumor-associated lymphocytes (TAL) in malignant ascites of immune-tolerant mice2021

    • Author(s)
      Satoshi Murata, Miyuki Shimoji, Masatsugu Kojima, Mina Kitamura, Andreas Michael Sihombing, Sakura Nakao, Naomi Kitamura, Tomoyuki Ueki, Katsushi Takebayashi, Hirokazu Kodama, Aya Tokuda, Toru Miyake, Eiji Mekata, Masaji Tani
    • Organizer
      第80回日本癌学会
    • Related Report
      2021 Research-status Report
  • [Presentation] Crosstalk of microsomal glutathione transferase 1 (MGST1) and CD44 in T3M4 human pancreatic cancer cells on hyperthermic model2021

    • Author(s)
      Miyuki Shimoji1, Satoshi Murata1,2, Andreas Michael Sihombing1, Sakura Nakao1, Katsushi Takebayashi1, Hirokazu Kodama1, Masatsugu Kojima1, Tomoyuki Ueki1, Naomi Kitamura3, Mina Kitamura1, Aya Tokuda1, Toru Miyake1, Eiji Mekata3, Masaji Tani1
    • Organizer
      第80回日本癌学会
    • Related Report
      2021 Research-status Report
  • [Presentation] Relationship between CD44-positive cancer stem-like cells and gastric cancer-derived peritoneal metastasis2021

    • Author(s)
      Andreas Michael Sihombing1, Satoshi Murata1,2, Miyuki Shimoji1, Sakura Nakao1, Katsushi Takebayashi1, Hirokazu Kodama1, Masatsugu Kojima1, Tomoyuki Ueki1, Naomi Kitamura3, Mina Kitamura1, Aya Tokuda1, Toru Miyake1, Eiji Mekata3, Masaji Tani1
    • Organizer
      第80回日本癌学会
    • Related Report
      2021 Research-status Report
  • [Presentation] Overcoming immune tolerance to tumor antigens and inducing tumor antigen-specific CTLs by combined immunotherapy2021

    • Author(s)
      Sakura Nakao, Satoshi Murata, Miyuki Shimoji, Masatsugu Kojima, Mina Kitamura, Andreas Michael Sihombing, Naomi Kitamura, Tomoyuki Ueki, Katsushi Takebayashi, Hirokazu Kodama, Aya Tokuda, Toru Miyake, Eiji Mekata, Masaji Tani
    • Organizer
      第80回日本癌学会
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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