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Development of tumor immunoactivation therapy targeting soluble CD155

Research Project

Project/Area Number 21H02708
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 49030:Experimental pathology-related
Research InstitutionUniversity of Tsukuba

Principal Investigator

Shibuya Kazuko  筑波大学, 医学医療系, 教授 (00302406)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2023: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2022: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2021: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
Keywords腫瘍免疫 / 免疫逃避 / 免疫受容体 / 分子標的療法 / 腫瘍免疫応答 / 可溶型免疫受容体
Outline of Research at the Start

最近、私たちは、マウス腫瘍モデルを用いて腫瘍が産生する可溶型CD155 (sCD155) が活性化受容体DNAM-1のシグナルを阻害することで、腫瘍免疫応答を抑制し、腫瘍の増殖や転移を促進していることを見出した。このことより、sCD155を除去すれば、腫瘍免疫応答の活性化シグナルを増強できると考えられる。本研究では、可溶型CD155を標的とした新たながん治療法確立の可能性を検討する。

Outline of Final Research Achievements

Tumor immune responses are regulated by the balance between activating and inhibitory signals to immune cells. In recent years, immune checkpoint inhibitors (ICIs), drugs that block inhibitory signals, have attracted attention as a new cancer therapy. However, their efficacy has been limited as the number of cases has accumulated. This suggests that blocking inhibitory signals by ICI alone is not sufficient to enhance tumor immune responses and that enhancing activation signals to immune cells is important.
The interaction of the activating receptor DNAM-1 expressed on immune cells with CD155 on tumors activates the tumor immune response. Human CD155 has a splicing variant, soluble CD155 (sCD155). We found that tumor-produced sCD155 suppresses tumor immune responses and promotes tumor growth and metastasis by inhibiting DNAM-1-mediated activation signals. This suggested that targeting sCD155 could enhance the activation signal of tumor immune response.

Academic Significance and Societal Importance of the Research Achievements

腫瘍免疫応答は、免疫細胞への活性化シグナルと抑制性シグナルのバランスで制御されている。抑制性シグナルを阻止する薬剤である免疫チェックポイント阻害剤は、新しいがんの治療法として注目された。しかし、症例を積み重ねるに従って効果が限定的であることが示され、新たな腫瘍免疫活性化剤の開発が待たれている。私たちは腫瘍から産生される可溶型CD155 (sCD155)が活性化受容体DNAM-1のシグナルを阻害することで、腫瘍免疫応答を抑制し、腫瘍の増殖や転移を促進していることを明らかにした。このことより、sCD155標的療法は、腫瘍免疫応答の活性化シグナルを増強する新しいがん治療法となることが期待される。

Report

(2 results)
  • 2023 Final Research Report ( PDF )
  • 2021 Annual Research Report
  • Research Products

    (12 results)

All 2021

All Journal Article (6 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 4 results) Presentation (6 results) (of which Invited: 1 results)

  • [Journal Article] DNAM-1 promotes inflammation-driven tumor development via enhancing IFN-γ production2021

    • Author(s)
      Nakamura-Shinya Y, Iguchi-Manaka A, Murata R, Sato K, Van Vo A, Kanemaru K, Shibuya A, Shibuya K.
    • Journal Title

      Int Immunol

      Volume: 34 Issue: 3 Pages: 149-157

    • DOI

      10.1093/intimm/dxab099

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] DNAM-1 regulates Foxp3 expression in regulatory T cells by interfering with TIGIT under inflammatory conditions.2021

    • Author(s)
      Kazuki Sato, Yumi Yamashita-Kanemaru, Fumie Abe, Rikito Murata, Yuho Nakamura-Shinya, Kazumasa Kanemaru, Masafumi Muratani, Andre Veillette, Motohito Goto, Mamoru Ito, Akira Shibuya, Kazuko Shibuya
    • Journal Title

      Proceedings of the National Academy of Sciences of the United States of America

      Volume: 118 Issue: 21

    • DOI

      10.1073/pnas.2021309118

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] 8.Yamashita-Kanemaru Y, Oh-oka K, Abe F, Shibuya K, Shibuya A. Suppression of Th1 and Th17 proinflammatory cytokines and upregulation of Foxp3 expression by a humanized anti-DNAM-1 monoclonal antibody2021

    • Author(s)
      Yamashita-Kanemaru Y, Oh-oka K, Abe F, Shibuya K, Shibuya A.
    • Journal Title

      Monoclonal Antibodies in Immunodiagnosis and Immunotherapy

      Volume: 40 Issue: 2 Pages: 52-59

    • DOI

      10.1089/mab.2020.0042

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 腫瘍由来可溶型CD155を介した新規免疫逃避機構2021

    • Author(s)
      奥村 元紀、渋谷 和子
    • Journal Title

      医学のあゆみ

      Volume: 278 Pages: 977-978

    • Related Report
      2021 Annual Research Report
  • [Journal Article] 炎症下におけるDNAM-1を介した制御性T細胞のFoxp3発現制御2021

    • Author(s)
      佐藤和貴、渋谷和子
    • Journal Title

      炎症と免疫

      Volume: 29 Pages: 383-390

    • Related Report
      2021 Annual Research Report
  • [Journal Article] DNAM-1 versus TIGIT: competitive roles in tumor immunity and inflammatory responses.2021

    • Author(s)
      Shibuya A, Shibuya K
    • Journal Title

      Int Immunol,

      Volume: 33 Issue: 12 Pages: 687-692

    • DOI

      10.1093/intimm/dxab085

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Tumor-derived soluble CD155 inhibits DNAM-1-mediated tumor immunity2021

    • Author(s)
      Shibuya K.
    • Organizer
      第50回日本免疫学会学術集会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Involvement of CD96 immunoreceptor on dermal γδT cells in the development of imiquimod-induced psoriasis2021

    • Author(s)
      Oh-oka K., Shibuya A., Shibuya K.
    • Organizer
      第50回日本免疫学会学術集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] CD155 mutation (Ala67Thr) reduces NK cell cytotoxicity by enhancing TIGIT signal2021

    • Author(s)
      Matsuo T., Shibuya A., Shibuya K.
    • Organizer
      第50回日本免疫学会学術集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] DNAM-1 interferes with the binding of TIGIT to CD155 and suppresses Foxp3 expression via an excess of the AKT/mTORC1 pathway in regulatory T cells2021

    • Author(s)
      Sato K., Yamashita-Kanemaru1 Y., Abe F., Nakamura Y., Murata R., Shibuya A., Shibuya K.
    • Organizer
      第50回日本免疫学会学術集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] DNAM-1 promotes inflammation-driven tumor development via enhancing IFN-γ production2021

    • Author(s)
      Nakamura-Shinya Y., Iguchi-Manaka A., Murata R., Sato K., Vo AV., Kanemaru K., Shibuya A., Shibuya K.
    • Organizer
      第50回日本免疫学会学術集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] NAM-1はIFN-γ産生の亢進を介して炎症性発がんを促進する2021

    • Author(s)
      新谷(中村)優歩、井口 研子、村田 力斗、佐藤 和貴、Anh Van Vo、金丸 和正、渋谷 彰、渋谷 和子
    • Organizer
      第85回日本日本インターフェロン・サイトカイン学会学術集会
    • Related Report
      2021 Annual Research Report

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Published: 2021-04-28   Modified: 2025-03-27  

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