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Mechanisms of Antibody Drug Resistance in Pancreatic Cancer: Focus on Complement Regulatory Proteins.

Research Project

Project/Area Number 20K16419
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 50020:Tumor diagnostics and therapeutics-related
Research InstitutionFukushima Medical University

Principal Investigator

Suzuki Rei  福島県立医科大学, 医学部, 助教 (80590546)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Keywords膵癌 / 補体 / C3a受容体 / がん微小環境
Outline of Research at the Start

免疫チェックポイント阻害薬などの抗体医薬の発展は目覚ましく, 各種がんの標準治療と
して使用されている. 一方, 膵癌は抗体医薬に耐性があり, その原因の一つとして膵癌の免疫原生低下が挙げられる. 免疫原生低下を示唆する所見として, 腫瘍内への細胞障害性T細胞の遊走障害, 骨髄由来抑制細胞の浸潤増加が確認されているが, TCGAデータベースで膵癌組織中の補体制御たんぱく質や補体受容体は上記の免疫細胞の浸潤と関連が示唆されている. 本研究で補体系を介した免疫調整機序を解明し, 治療への応用を期待する。

Outline of Final Research Achievements

Our findings include the followings. First, we found that C3AR (complement component 3a receptor) is expressed in pancreatic cancer cells. Adding its ligand, C3a, enhances cell proliferation and invasion. Second, we also identified the presence of C3 protein within the cytoplasm of pancreatic cancer cells, which is involved in epithelial-mesenchymal transition, a process associated with cancer metastasis. Finally, we found that C3AR expression promotes the infiltration of immune cells, particularly M2 macrophages and regulatory T cells. 4) C3AR is involved in M2 macrophage polarization, known to suppress anti-tumor immune responses. Decreased C3AR expression inhibits M2 polarization and promotes the activation of cytotoxic T cells. These findings highlight the significance of C3AR in pancreatic cancer progression and suggest its potential as a target for reversing immune suppression and enhancing anti-cancer immune responses.

Academic Significance and Societal Importance of the Research Achievements

膵癌細胞に発現する補体C3や受容体C3ARとEMTに関する報告はなく新規性高い報告となった。新規の抗がん薬開発が進まない膵癌治療において、C3ARは新たな治療標的となる可能性がある。また、抗腫瘍免疫応答において免疫抑制的に作用するM2マクロファージの発生においてもC3ARが関連している可能性がある事は大変興味深い。C3ARを標的とする治療が膵癌細胞のEMTを抑制できるだけではなく、同時に免疫抑制細胞の作用を減弱させる抗腫瘍免疫応答増強にも寄与できる可能性があると考えた。

Report

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

    (7 results)

All 2023 2022 2021 2020

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (4 results)

  • [Journal Article] Clinical benefit of subsequent chemotherapy after drug-i3nduced interstitial lung disease in pancreatic cancer patients: a multicenter retrospective study from Japan2023

    • Author(s)
      Irie Hiroki、Suzuki Rei、Okubo Yoshinori、Asama Hiroyuki、Konno Naoki、Noguchi Yuki、Watanabe Ko、Shibukawa Goro、Imamura Hidemichi、Takagi Tadayuki、Sugimoto Mitsuru、Sato Yuki、Nakamura Jun、Kato Tsunetaka、Hashimoto Minami、Yanagita Takumi、Hikichi Takuto、Ohira Hiromasa
    • Journal Title

      BMC Cancer

      Volume: 23 Issue: 1 Pages: 316-316

    • DOI

      10.1186/s12885-023-10781-x

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The Complement C3a-C3a Receptor Axis Regulates Epithelial-to-Mesenchymal Transition by Activating the ERK Pathway in Pancreatic Ductal Adenocarcinoma2022

    • Author(s)
      SUZUKI REI、OKUBO YOSHINORI、TAKAGI TADAYUKI、SUGIMOTO MITSURU、SATO YUKI、IRIE HIROKI、NAKAMURA JUN、TAKASUMI MIKA、KATO TSUNETAKA、HASHIMOTO MINAMI、KOBASHI RYOUICHIRO、HIKICHI TAKUTO、OHIRA HIROMASA
    • Journal Title

      Anticancer Research

      Volume: 42 Issue: 3 Pages: 1207-1215

    • DOI

      10.21873/anticanres.15587

    • Related Report
      2022 Annual Research Report 2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Intracellular C3 Modulates EMT<i>via</i>the Akt/Smad Pathway in Pancreatic Cancer Cells2022

    • Author(s)
      SUZUKI REI、TAKAGI TADAYUKI、SUGIMOTO MITSURU、SATO YUKI、IRIE HIROKI、YOMOGIDA YUKI、OHIRA HIROMASA
    • Journal Title

      Anticancer Research

      Volume: 42 Issue: 12 Pages: 5743-5750

    • DOI

      10.21873/anticanres.16081

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Presentation] 膵癌免疫回避機構における補体C3受容体C3ARの役割2023

    • Author(s)
      鈴木 玲、高木忠之、大平弘正
    • Organizer
      第109回 日本消化器病学会総会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 膵癌細胞内補体 C3 の意義に関する検討2021

    • Author(s)
      鈴木 玲
    • Organizer
      第52回 日本膵臓学会
    • Related Report
      2021 Research-status Report
  • [Presentation] 補体C3a/C3aR axisはMAPK/Erk signaling pathwayを介して膵癌上皮間葉転換を制御する2021

    • Author(s)
      鈴木 玲
    • Organizer
      第63回 日本消化器病学会
    • Related Report
      2021 Research-status Report
  • [Presentation] 膵癌微小環境における補体C3aの働きに関する検討2020

    • Author(s)
      鈴木 玲、高木忠之、大平弘正
    • Organizer
      第62回日本消化器病学会大会
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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