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Changes after neoadjuvant chemotherapy in B cell subsets of gastric cancer using scRNA-seq

Research Project

Project/Area Number 21K07244
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 InstitutionKyushu University

Principal Investigator

NAGAI Eishi  九州大学, 医学研究院, 共同研究員 (30264021)

Co-Investigator(Kenkyū-buntansha) 進藤 幸治  九州大学, 大学病院, 講師 (00788432)
藤田 逸人  九州大学, 医学研究院, 共同研究員 (40611281)
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: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords胃癌 / 化学療法 / B細胞 / 食道癌 / scRNA-seq / 腫瘍微小環境 / 術前化学療法 (NAC) / 免疫微小環境
Outline of Research at the Start

胃癌に対する術前化学療法 (NAC) は限られた症例に対して有効性が示されているものの、治療抵抗性を示す症例も存在する。本研究ではDrop-Seq技術を基盤としたsingle cell RNA-sequence (scRNA-seq) を用いてNAC施行群とNAC非施行群の胃癌切除症例を比較する。NAC施行の有無に注目し免疫微小環境中のB細胞subsetの変動を明らかにすることで、これまで見出せなかった発癌・治療抵抗性に関わる新規のB細胞subsetや微小環境中の細胞相互作用を同定する。さらにその機序に基づく新たな治療法の開発を目標とする。

Outline of Final Research Achievements

The present study with scRNA-seq showed heterogeneity among B cells, such as immature, activated, and memory B cells. IgG-related gene expression of plasma cells involved in antibody-dependent cytotoxic effects was significantly higher in gastric cancer than in the adjacent normal tissues. Recently, it has been reported that B cells form tertiary lymph follicles in the tumor and promote the functional activity of CD8-positive T cells. In the present study, CTLA4 expression was low in chemotherapy-treated gastric cancer patients, and LAG3 expression was low in Nivolumab patients. These results suggest that the immune checkpoint molecules targeted by treatment may differ.

Academic Significance and Societal Importance of the Research Achievements

近年、腫瘍免疫におけるB細胞の抗腫瘍機能について着目されており、本研究では明らかなった化学療法や免疫チェックポイント阻害薬によるB細胞の変化は胃癌腫瘍微小環境の理解の一助となり、治療抵抗性胃癌腫瘍微小環境のリモデリングが期待できる免疫チェックポイント分子の同定は胃癌新規治療開発につながる可能性がある。

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

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

  • [Journal Article] Tumor-infiltrating monocytic myeloid-derived suppressor cells contribute to the development of an immunosuppressive tumor microenvironment in gastric cancer2024

    • Author(s)
      Tsutsumi Chikanori、Ohuchida Kenoki、Katayama Naoki、Yamada Yutaka、Nakamura Shoichi、Okuda Sho、Otsubo Yoshiki、Iwamoto Chika、Torata Nobuhiro、Horioka Kohei、Shindo Koji、Mizuuchi Yusuke、Ikenaga Naoki、Nakata Kohei、Nagai Eishi、Morisaki Takashi、Oda Yoshinao、Nakamura Masafumi
    • Journal Title

      Gastric Cancer

      Volume: 27 Issue: 2 Pages: 248-262

    • DOI

      10.1007/s10120-023-01456-4

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Tertiary lymphoid structures correlate with enhancement of antitumor immunity in esophageal squamous cell carcinoma2023

    • Author(s)
      Nakamura Shoichi、Ohuchida Kenoki、Hayashi Masataka、Katayama Naoki、Tsutsumi Chikanori、Yamada Yutaka、Hisano Kyoko、Okuda Sho、Ohtsubo Yoshiki、Iwamoto Chika、Torata Nobuhiro、Mizuuchi Yusuke、Shindo Koji、Nakata Kohei、Moriyama Taiki、Morisaki Takashi、Oda Yoshinao、Nakamura Masafumi
    • Journal Title

      British Journal of Cancer

      Volume: 129 Issue: 8 Pages: 1314-1326

    • DOI

      10.1038/s41416-023-02396-7

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Single‐cell transcriptome analysis reveals functional changes in tumour‐infiltrating B lymphocytes after chemotherapy in oesophageal squamous cell carcinoma2023

    • Author(s)
      Nakamura S, Ohuchida K, Ohtsubo Y, Yamada Y, Tsutsumi C, Okuda S, Hisano K, Mochida Y, Shinkawa T, Iwamoto C, Torata N, Mizuuchi Y, Shindo K, Nakata K, Moriyama T, Torisu T, Nagai E, Morisaki T, Kitazono T, Oda Y, Nakamura M
    • Journal Title

      Clinical and Translational Medicine

      Volume: 13 Issue: 1

    • DOI

      10.1002/ctm2.1181

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] single cell RNA sequenceを用いた食道癌浸潤Bリンパ球における化学療法後の機能変動の詳細な解明2023

    • Author(s)
      中村祥一、大内田研宙、堤親範、久野恭子、奥田翔、大坪慶志輝、寅田信博、水内祐介、進藤幸治、仲田興平、森山大樹、中村雅史
    • Organizer
      第31回日本消化器関連学会週間(JDDW 2023)
    • Related Report
      2023 Annual Research Report
  • [Presentation] 胃癌免疫抑制性微小環境における腫瘍浸潤多形核系骨髄由来抑制細胞の重要性2023

    • Author(s)
      堤親範、大内田研宙、片山直樹、奥田翔、 久野恭子、大坪慶志輝、寅田信博、 進藤幸治、森山大樹、水内祐介、仲田興平、中村雅史
    • Organizer
      第31回日本消化器関連学会週間(JDDW 2023)
    • Related Report
      2023 Annual Research Report
  • [Presentation] 三次リンパ組織様構造の有無に着目したCD8陽性Tリンパ球の機能に関するscRNA-seq解析2023

    • Author(s)
      中村祥一、大内田研宙、片山直樹、堤親範、久野恭子、寅田信博、水内祐介、進藤幸治、仲田興平、中村雅史
    • Organizer
      第44回癌免疫外科研究会
    • Related Report
      2023 Annual Research Report
  • [Presentation] scRNA-seqを用いたHER2陽性胃癌におけるCD8陽性T細胞の細胞障害性分子の解明2023

    • Author(s)
      堤親範、大内田研宙、片山直樹、大坪慶志輝、中村祥一、奥田翔、久野恭子、寅田信博、進藤幸治、森山大樹、水内祐介、仲田興平、中村雅史
    • Organizer
      第95回日本胃癌学会総会
    • Related Report
      2023 Annual Research Report
  • [Presentation] シングルセル解析を用いた食道癌における制御性B細胞の検討2023

    • Author(s)
      中村祥一、大内田研宙、堤親範、久野恭子、奥田翔、大坪慶志輝、寅田信博、水内祐介、進藤幸治、仲田興平、森山大樹、中村雅史
    • Organizer
      第123回日本外科学会定期学術集会
    • Related Report
      2022 Research-status Report
  • [Presentation] scRNA-seqを用いた術前化学療法に伴う食道癌内B細胞の不均一性の変動の解析2022

    • Author(s)
      中村祥一、大内田研宙、奥田翔、大坪慶志輝、寅田信博、水内祐介、進藤幸治、仲田興平、森山大樹、中村雅史
    • Organizer
      第122回日本外科学会定期学術集会
    • Related Report
      2022 Research-status Report
  • [Presentation] Functions of CD8-positive T cells in gastric non-solid type poorly differentiated adenocarcinoma2022

    • Author(s)
      Chikanori Tsutsumi, Kenoki Ohuchida, Shoichi Nakamura, Sho Okuda, Kyoko Hisano, Yoshiki Otsubo, Koji Shindo, Taiki Moriyama, Yusuke Mizuuchi, Kohei Nakata, Masafumi Nakamura
    • Organizer
      INTERNATIONAL GASTRIC CANCER CONGRESS 2022
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research

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

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