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Development of novel cancer immunotheray by combining regulatory T-cell elimination and TGF-b inhibitors

Research Project

Project/Area Number 21K07203
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 InstitutionAichi Medical University

Principal Investigator

Suzuki Susumu  愛知医科大学, 研究創出支援センター, 教授 (70518422)

Co-Investigator(Kenkyū-buntansha) シバスンダラン カルナン  愛知医科大学, 医学部, 講師 (30557096)
小川 徹也  愛知医科大学, 医学部, 教授 (40334940)
土本 純  愛知医科大学, 分子医科学研究所, 助教 (70632868)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
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)
Keywords細胞傷害性T細胞 / 制御性T細胞 / NK細胞 / 口腔癌 / TGFb / CCR4 / モガムリズマブ / トラメチニブ / 抗体依存性細胞傷害 / ケモカイン受容体4 / TGF-β / MEK / ADCC / CTL / Treg / M2マクロファージ / CAF / TGF-b / RNAscope / regulatory T-cell / immunotherapy / cytotoxic T-cell
Outline of Research at the Start

免疫療法は、がんに対する新たな治療法として認知されるに至ったが、奏効率が20-30%と限定的であり、更なる改良や新規開発が求められている。申請者らは、主に頭頸部がん標本を用いた研究から、がん免疫抑制環境の形成に制御性T細胞(Treg)に加えてTGF-bが強く関与することを見出した。がん免疫治療のポイントは、がん免疫抑制環境の改善であり、従って、Treg制御とTGF-b阻害による併用療法が、がん治療に効果的である可能性がある。申請者らは、本研究において、がん免疫の増強に効果的なTGF-b阻害剤標的分子の探索と、阻害剤の開発を行い、さらにTreg制御との併用効果について検討する。

Outline of Final Research Achievements

In vitro studies have revealed that TGFb directly inhibits the function of cytotoxic T lymphocytes (CTLs). Furthermore, when the expression of the TGFB1 gene was examined using oral cancer tissue, it was found to be highly expressed at the tumor infiltration front, suggesting that it weakens the function of T cells infiltrating around the tumor site and shifts the immune environment within the tumor in a suppressive direction. This has revealed the importance of TGFb1 as a target molecule for new cancer immunotherapy. On the other hand, TGFb enhanced the expression of CCR4 on CTLs. This hinders new cancer treatments that use CCR4 antibodies to remove Tregs, but it has been shown that trametinib (a MEK inhibitor) is useful for selectively damaging Tregs.

Academic Significance and Societal Importance of the Research Achievements

オプジーボ、ヤーボイなどの免疫チェックポイント阻害剤は、第4のがん治療法として、近年急速に発展した。しかしながら、治療効果は20%-30%の症例に限られることから、新たな視点でのがん免疫治療法の開発が望まれている。制御性T細胞(Treg)は、がん免疫を強力に抑制することが知られている。国内において、モガムリズマブ(CCR4抗体)を用いTregを標的としたがん免疫治療医師主導治験が行われたが、結果は満足ではなく改善策が必要である。今回の研究成果は、TGFbのT細胞に対する直接的抑制機序や、細胞傷害性T細胞上CCR4の発現機序を明らかとし、改善のための一定のアイデアを提供するものとなった。、

Report

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

    (10 results)

All 2024 2023 2022 2021

All Journal Article (7 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 7 results,  Open Access: 5 results) Presentation (3 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Regulatory T-cells activated in metastatic draining lymph nodes possibly suppress cancer immunity in cancer tissues of head and neck squamous cell cancer2024

    • Author(s)
      Suzuki S, Tsuzuki T, Saito M, Ishii T, Takahara T, Satou A, Inukai D, Yamanaka S, Yoshikawa K, Ueda R, Ogawa T
    • Journal Title

      Pathology International

      Volume: -

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Establishment of Mucoepidermoid Carcinoma Cell Lines from Surgical and Recurrence Biopsy Specimens2023

    • Author(s)
      Yamanaka S, Suzuki S, Ito H, Sivasundaram K, Hanamura I, Okubo I, Yoshikawa K, Ono S, Takahara T, Satou A, Tsuzuki T, Ueda R, Ogawa T, Fujimoto Y.
    • Journal Title

      International journal of molecular sciences

      Volume: 24 Issue: 2 Pages: 1722-1722

    • DOI

      10.3390/ijms24021722

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Immune Status of Cervical Lymph Nodes in Head and Neck Cancer-A Surgical Oncology Perspective2023

    • Author(s)
      Hiromu Nakamura, Tetsuya Ogawa, Shunpei Yamanaka, Daisuke Inukai, Takashi Maruo, Taishi Takahara, Akira Satou, Toyonori Tsuzuki, Susumu Suzuki, Ryuzo Ueda, Yasushi Fujimoto
    • Journal Title

      Immune Status of Cervical Lymph Nodes in Head and Neck Cancer-A Surgical Oncology Perspective

      Volume: 13 Issue: 7 Pages: 11741183-11741183

    • DOI

      10.3390/jpm13071174

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Trametinib improves Treg selectivity of anti-CCR4 antibody by regulating CCR4 expression in CTLs in oral squamous cell carcinoma2022

    • Author(s)
      Ono S, Suzuki S, Kondo Y, Okubo I, Goto M, Ogawa T, Kato H, Ito H, Takahara T, Satou A, Tsuzuki T, Yoshikawa K, Nagao T, Ueda R.
    • Journal Title

      Scientific Reports

      Volume: 12 Issue: 1 Pages: 21678-21678

    • DOI

      10.1038/s41598-022-22773-1

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] In Situ PD-L1 Expression in Oral Squamous Cell Carcinoma Is Induced by Heterogeneous Mechanisms among Patients2022

    • Author(s)
      Kondo Y, Suzuki S, Ono S, Goto M, Miyabe S, Ogawa T, Tsuchida H, Ito H, Takahara T, Satou A, Tsuzuki T, Yoshikawa K, Ueda R, Nagao T.
    • Journal Title

      International journal of molecular sciences

      Volume: 23 Issue: 8 Pages: 4077-4077

    • DOI

      10.3390/ijms23084077

    • Related Report
      2022 Research-status Report 2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] An In Vivo Study of Local Administration of Low-dose Anti-PD-1 Antibody Using an Oral Cancer Cell Line.2022

    • Author(s)
      Sakuma K, Kii T, Takahashi H, Suzuki S, Yoshikawa K, Ogawa T, Tanaka A.
    • Journal Title

      Ainticancer Research

      Volume: 42 Issue: 9 Pages: 4293-4303

    • DOI

      10.21873/anticanres.15929

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Improving function of cytotoxic T‐lymphocytes by transforming growth factor‐β inhibitor in oral squamous cell carcinoma2021

    • Author(s)
      Kondo Yutaro、Suzuki Susumu、Takahara Taishi、Ono Shoya、Goto Mitsuo、Miyabe Satoru、Sugita Yoshihiko、Ogawa Tetsuya、Ito Hideaki、Satou Akira、Tsuzuki Toyonori、Yoshikawa Kazuhiro、Ueda Ryuzo、Nagao Toru
    • Journal Title

      Cancer Science

      Volume: 112 Issue: 10 Pages: 4037-4049

    • DOI

      10.1111/cas.15081

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] T-cell receptor repertoire similarity in regulatory T-cells between draining lymph nodes and cancer tissues.2023

    • Author(s)
      Suzuki S, Saito M, Ishii T, Takahara T, Satou A, Inukai D, Yamanaka S, Yoshikawa K, Tsuzuki T, Ueda R and Ogawa T.
    • Organizer
      2nd JCA-AACR Precision Cancer Medicine International Conference
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Trametinib improves Treg selectivity of anti-CCR4 mAb by regulating CCR4 expression in CTLs induced via TCR/TGF-β signaling2022

    • Author(s)
      Ono S, Suzuki S, Kondo Y, Okubo I, Goto M, Ogawa T, Kato H, Ito H, Takahara T, Satou A, Tsuzuki T, Yoshikawa K, Nagao T, Ueda R.
    • Organizer
      日本癌学会
    • Related Report
      2022 Research-status Report
  • [Presentation] Transforming growth factor-β inhibitor is a candidate drug for immunotherapy of oral squamous cell carcinoma2021

    • Author(s)
      Kondo Y, Suzuki S, Takahara T, Ono S, Goto M, Miyabe S, Sugita Y, Ogawa T, Ito H, Satou A, Tsuzuki T, Yoshikawa K, Ueda R, Nagao T.
    • Organizer
      第80回 日本癌学会学術総会
    • Related Report
      2021 Research-status Report

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

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