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Development of in vitro culture to generate helper T cells from iPS cells

Research Project

Project/Area Number 20K07694
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 InstitutionKyoto University

Principal Investigator

Kawai Yohei  京都大学, iPS細胞研究所, 特定助教 (90623364)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywordshelper T cell / iPS cell / Tumor immunotherapy / iPS細胞 / ヘルパーT細胞 / Notch / T細胞 / 免疫療法
Outline of Research at the Start

悪性腫瘍や慢性難治性感染症の制圧にはT細胞を用いた細胞療法が極めて有効な可能性が高い。抗原特異性と機能性を保持したT細胞の大量調製を可能にするため、申請者らはiPS細胞からヒト細胞傷害性T細胞に至る分化培養系を開発した。次のステップとして本研究では、細胞傷害性細胞の効用を最大化できるヘルパーT 細胞の誘導を同じくiPS細胞から試みる。iPS細胞から効率良くヘルパーT細胞を作製するための必要十分因子を探索し、最終的にはiPS細胞由来細胞傷害性T細胞とヘルパーT細胞の併用による効果的な免疫細胞療法の実現を目指している。

Outline of Final Research Achievements

We have developed in vitro culture system which can generate helper T cells from iPS cells in complete feeder-free condition. We found iPS cell-derived helper T cells expressed helper-associated transcription factor Thpok abundantly and induced expression of a central helper effector molecule CD40L, which is involved in dendritic cell maturation, equivalently or more compared with primary helper T cells.
Furthermore, we found the iPS cell-derived helper T cells could acquire cytotoxic activity during specific cell expansion culture. This cytotoxic helper T cells showed potent anti-tumor activity with superior cytokine production and proliferation capacity compared with conventional iPS cell-derived killer T cells.

Academic Significance and Societal Importance of the Research Achievements

腫瘍免疫治療においては腫瘍抗原の発現低下による免疫回避や免疫抑制的な腫瘍微小環境の修正が重要であるが、この問題の解決にはヘルパーT細胞が重要な役割を果たし得る。本件で作製されたiPS細胞由来ヘルパーT細胞はヘルパーT細胞としての機能に加え、①フィーダーフリーで作製できるため臨床応用に対応しやすい、iPS細胞をセルソースとしているため②大量生産が可能、③ゲノム編集が容易、④品質管理が容易という強みも併せ持つ。さらにシンプルな操作でフィーダーフリー条件でiPSCから簡便にヘルパーT細胞を誘導できるため、本研究で樹立された分化培養系は、サンプルの入手が困難なヒトT細胞分化研究にも貢献し得ると考える。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (3 results)

All 2022 2021 2020

All Journal Article (2 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Book (1 results)

  • [Journal Article] iPS細胞を用いたがん免疫療法について2022

    • Author(s)
      河合洋平、金子新
    • Journal Title

      BIO EX-press

      Volume: - Pages: 22-27

    • Related Report
      2022 Annual Research Report
  • [Journal Article] Generation of highly proliferative, rejuvenated cytotoxic T cell clones through pluripotency reprogramming for adoptive immunotherapy2021

    • Author(s)
      Yohei Kawai, Ai Kawana-Tachikawa, Shuichi Kitayama, Tatsuki Ueda, Shoji Miki, Akira Watanabe and Shin Kaneko
    • Journal Title

      Molecular Therapy

      Volume: 29 Issue: 10 Pages: 3027-3041

    • DOI

      10.1016/j.ymthe.2021.05.016

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Book] 腫瘍内科2020

    • Author(s)
      河合洋平その他
    • Total Pages
      114
    • Publisher
      科学評論社
    • Related Report
      2020 Research-status Report

URL: 

Published: 2020-04-28   Modified: 2024-12-25  

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