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Development of selective regulatory system for proliferation and persistence of CAR-T cells

Research Project

Project/Area Number 19K07714
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 InstitutionJichi Medical University

Principal Investigator

Uchibori Ryosuke  自治医科大学, 医学部, 講師 (20458285)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywordsキメラ抗原受容体 / CAR / 選択的制御遺伝子 / SRG / B細胞性リンパ腫 / 多発性骨髄腫 / CAR-T療法 / 造血器腫瘍 / エリスロポエチン
Outline of Research at the Start

キメラ抗原受容体(CAR; chimeric antigen receptor)を用いたCAR-T療法は、がん免疫療法のブレイクスルーの一つと評されるほどの驚異的な治療効果を示している。しかし、治療無効症例やCAR-T療法後の再発症例に対する新たな戦略・技術開発が重要な課題とされている。我々がこれまでに取り組んできたCARの開発・臨床研究を踏まえ、本研究では、生体に投与した後にもCAR-T細胞選択的な増殖・生存制御を可能にする選択的制御遺伝子(SRG; selective regulatory gene)を構築し、CAR-T療法の有効性を高める基盤技術となることを明らかにする。

Outline of Final Research Achievements

In this study, we developed a selective regulatory gene (SRG) to selectively regulate proliferatoin and survival of CAR-T cells in vitro and in vivo. SRG-T cells were selectively expanded upon stimulation with an inducer (EPO). SRG-CAR-T cells showed cytolytic activity against CD19-positive target cells in vitro. In therapeutic experiments with tumor-bearing mice, SRG-CAR-T cells strongly suppressed tumor growth and all mice were survived even under conditions in which conventional CAR-T cells were unable to control tumor growth.

Academic Significance and Societal Importance of the Research Achievements

本研究では、in vitroおよびin vivoで、CAR-T細胞の増殖・生存制御を選択的かつ効率よく可能にするSRG技術を開発した。この成果は、CAR-T療法の可能性拡大や有効性の向上に繋がる基盤技術として利用できることだけに留まらず、T細胞を用いたあらゆる免疫細胞療法に対しても広く波及することが期待される。

Report

(2 results)
  • 2021 Final Research Report ( PDF )
  • 2019 Research-status Report
  • Research Products

    (1 results)

All 2019

All Presentation (1 results) (of which Int'l Joint Research: 1 results)

  • [Presentation] Analysis of RetroNectin-Mediated T-Cell Activation on Expansion and Phenotype of Chimeric Antigen Receptor T Cells2019

    • Author(s)
      Ryosuke Uchibori、 Ken Ohmine、Junichi Mineno、Keiya Ozawa
    • Organizer
      The 10th Meeting of ACTO
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2024-12-25  

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