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Development of TCR gene therapy with allogeneic T cells deficient in endogenous TCR and MHC class I molecules

Research Project

Project/Area Number 19K23919
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0901:Oncology and related fields
Research InstitutionNagasaki University

Principal Investigator

Okada Satomi  長崎大学, 医歯薬学総合研究科(医学系), 客員研究員 (40849501)

Project Period (FY) 2019-08-30 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords免疫療法 / 輸注療法 / 非自己リンパ球 / 宿主組織傷害 / 拒絶 / 腫瘍免疫 / TCR
Outline of Research at the Start

免疫療法は悪性腫瘍に対する新たな治療として注目されている。免疫療法のひとつである受容体改変T細胞療法による悪性腫瘍の克服は、近年大きく期待されている分野である。現在の受容体改変T細胞療法は自己T細胞を用いたものであり、汎用性を阻んでいる。そこで本研究では、より効果的で汎用性の高いT細胞療法の開発を目指すため、非自己T細胞を用いた受容体改変T細胞療法に着目した。非自己T細胞を用いる際に“宿主組織傷害”と“輸注細胞の拒絶”が克服すべき課題であり、本研究では、内因性TCR発現の抑制とMHC発現の抑制を行うことで非自己T細胞による輸注療法の可能性を明らかにする。

Outline of Final Research Achievements

Adoptive immunotherapy using genetically engineered patient-derived lymphocytes to express tumor-reactive receptors is a promising treatment for malignancy. However, utilization of autologous T cells in this therapy limits the quality of gene-engineered T cells, thereby inhibiting the timely infusion of the cells into the patients. In this study, we evaluated the anti-tumor efficacy and the potential to induce graft-versus-host disease (GVHD) in T cell receptor (TCR) gene- engineered allogeneic T cells that downregulate the endogenous TCR and HLA class I molecules. We transduced human lymphocytes with a high-affinity TCR specific to the cancer/testis antigen NY-ESO-1, using a novel retrovirus vector with siRNAs specific to the endogenous TCR and lentivirus-based CRISPR/Cas9 system targeting β-2 microglobulin. In non-obese diabetic/SCID/γcnull mice, TCR gene-transduced T cells induced tumor regression without development of GVHD.

Academic Significance and Societal Importance of the Research Achievements

腫瘍を認識する受容体を遺伝子導入したT細胞の輸注療法は、悪性腫瘍に対する治療法として期待されている。しかしながら、自己細胞を用いた治療は品質の制限を受け、また投与までに長期間を要するため、有効性と汎用性を阻んでいる。本研究では、より効果的で汎用性の高いT細胞療法の開発を目指すため、非自己T細胞を用いた受容体改変T細胞療法に着目した。非自己T細胞を用いる際に“宿主組織傷害”と“輸注細胞の拒絶”が克服すべき課題であり、内因性TCR発現の抑制とMHC発現の抑制を行い、抗腫瘍効果を確認することができ、非自己T細胞による輸注療法の可能性を明らかにした。

Report

(6 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (2 results)

All 2023 2019

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (1 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] T cell receptor gene‐modified allogeneic T cells with siRNA for endogenous T cell receptor induce efficient tumor regression without graft‐versus‐host disease2023

    • Author(s)
      Satomi Okada, Daisuke Muraoka, Kiyoshi Yasui, Isao Tawara, Ayumi Kawamura, Sachiko Okamoto, Junichi Mineno, Naohiro Seo, Hiroshi Shiku, Susumu Eguchi, Hiroaki Ikeda
    • Journal Title

      Cancer Science

      Volume: 114 Issue: 11 Pages: 4172-4183

    • DOI

      10.1111/cas.15954

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Possibility of future clinical application of adoptive cell therapy with allogeneic T cells deficient in endogenous TCR and HLA class I molecules for digestive cancer patients2019

    • Author(s)
      Satomi Okada, Mitsuhisa Takatsuki, Daisuke Muraoka, Kiyoshi Yasui, Sachiko Okamoto, Junichi Mineno, Hiroshi Shiku, Hiroaki Ikeda, Susumu Eguchi
    • Organizer
      APDW2019(Asian Pacific Digestive Week)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

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Published: 2019-09-03   Modified: 2025-01-30  

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