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Investigating whether antibody production contributes to immune-related adverse events using an acellular protein synthesis system

Research Project

Project/Area Number 20K07676
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 InstitutionKobe University

Principal Investigator

Minami Hironobu  神戸大学, 医学研究科, 教授 (60450574)

Co-Investigator(Kenkyū-buntansha) 船越 洋平  神戸大学, 医学部附属病院, 助教 (50566966)
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: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords免疫チェックポイント阻害薬 / 免疫関連有害事象 / B細胞 / がん / 抗体 / B細胞受容体レパトア解析 / 無細胞タンパク質合成系による抗体作成 / 網羅型タンパク質アレイ
Outline of Research at the Start

免疫チェックポイント阻害薬の副作用である免疫関連有害事象(irAE)の発症メカニズムを解明し、対策方法を確立する。我々は「irAEに、正常組織由来の抗原と自己反応性抗体の抗原抗体反応が関与している」という仮説を立てた。これを、“B細胞受容体レパトア解析”、“無細胞タンパク質合成系による抗体作成”および“網羅型タンパク質アレイ”の技術を駆使することで明らかにする。

Outline of Final Research Achievements

To determine whether antigen-antibody reactions contribute to immune-related adverse events (irAE), B cell kinetics were analyzed in patients receiving a combination therapy of anti-CTLA-4 and anti-PD-1 antibodies. Compared to patients who did not develop irAE, CD21LowB cells, plasmablasts, and plasma cells were significantly increased in 5 patients who experienced grade 3 irAE.
The BCR repertoire was analyzed in a patient who developed irAE hepatitis together with a dramatic increase in the number of activated B cells. BCR gene sequences of CD21LowB cells were ranked according to copy number, and 20 unique sequences with high copy numbers were selected for further analysis. However, single cell analysis did not detect these sequences in CD21LowB cells.

Academic Significance and Societal Importance of the Research Achievements

免疫チェックポイント阻害薬の副作用である免疫関連有害事象(irAE)の発症リスクが高い抗CTLA-4抗体と抗PD-1抗体の併用療法を受けた患者のうち、重度のirAEを発症した患者では活性化B細胞サブセットが著増していたのに対し発症しなかった患者では変化がなかったことを示し、特定のirAEでコピー数が増大したBCRレパトアを特定できたことは、シングルセル解析では同じ配列が検出されなかったものの、irAEの発症にB細胞も関与していることを示唆するものであり、irAEの本態解明に資し発症予測や治療法開発につながるもので意義は大きいと考える。

Report

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

    (4 results)

All 2022

All Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (1 results)

  • [Journal Article] Open-label phase II study of the efficacy of nivolumab for cancer of unknown primary2022

    • Author(s)
      J. Tanizaki, K. Yonemori, K. Akiyoshi, H. Minami, H. Ueda, Y. Takiguchi, et al.
    • Journal Title

      Annals of Oncology

      Volume: 33 Issue: 2 Pages: 216-226

    • DOI

      10.1016/j.annonc.2021.11.009

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Transition of the PD?1 occupancy of nivolumab on T cells after discontinuation and response of nivolumab re?challenge2022

    • Author(s)
      Nose Taku、Funakoshi Yohei、Suto Hirotaka、Nagatani Yoshiaki、Imamura Yoshinori、Toyoda Masanori、Kiyota Naomi、Minami Hironobu
    • Journal Title

      Molecular and Clinical Oncology

      Volume: 16 Issue: 5

    • DOI

      10.3892/mco.2022.2537

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Safety and efficacy of nivolumab plus bevacizumab, paclitaxel for HER2-negative metastatic breast cancer: Primary results and biomarker data from a phase 2 trial (WJOG9917B)2022

    • Author(s)
      Ozaki Yukinori、Tsurutani Junji、Mukohara Toru、Iwasa Tsutomu、Takahashi Masato、Tanabe Yuko、Kawabata Hidetaka、Masuda Norikazu、Futamura Manabu、Minami Hironobu、Matsumoto Koji、Yoshimura Kenichi、Kitano Shigehisa、Takano Toshimi
    • Journal Title

      European Journal of Cancer

      Volume: 171 Pages: 193-202

    • DOI

      10.1016/j.ejca.2022.05.014

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Tumor immune microenvironment in salivary gland cancer2022

    • Author(s)
      Nagatani Y, Kiyota N, Imamura Y, Koyama T, Funakoshi Y, Komatsu M, Teshima M, Nibu K, Sakai K, Nishio K, Shimomura M, Nakatsura T, Ikarashi D, Nakayama T, Kitano S, Minami H
    • Organizer
      Assoc Am Cancer Res
    • Related Report
      2022 Annual Research Report

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

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