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Spatiotemporal Dynamics in Gastric Cancer Invasion

Research Project

Project/Area Number 22K16028
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 53010:Gastroenterology-related
Research InstitutionKeio University

Principal Investigator

Togasaki Kazuhiro  慶應義塾大学, 医学部(信濃町), 助教 (50936408)

Project Period (FY) 2022-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2023: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2022: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords胃がん / 浸潤 / シングルセル / ライブイメージング / オルガノイド
Outline of Research at the Start

びまん性胃がんは高い浸潤能・播種性を特徴とする極めて悪性度の高い疾患であるが,適切なヒト疾患モデルの欠如により根本的な治療法は未だ確立されていない.本研究では申請者らが確立したin vivoびまん性胃がんオルガノイドモデルに加えて,シングルセル発現解析,空間的発現解析,in vivoライブイメージング技術を駆使することで,腫瘍の浸潤過程を1細胞レベルで追跡・解析し,浸潤を担う腫瘍細胞の機能と動態を解明する.これまで困難であった悪性腫瘍の浸潤のダイナミクスを捕捉する技術基盤を確立し,メカニズムを突き止めることで,難治性の理解を深めるとともに新規治療開発を目指す.

Outline of Final Research Achievements

In this study, we aimed to elucidate the functionality and dynamics of tumor cells responsible for invasion using an orthotopic transplantation model of patient-derived diffuse gastric cancer organoids. We performed single-cell mRNA sequencing of orthotopically transplanted tumors and identified clusters with genes previously reported to be highly expressed at invasive fronts. Survival analysis using TCGA cohort data showed that genes in these clusters are associated with poor prognosis. In vivo fluorescence visualization of cells using these marker genes showed dynamics of accumulation of fluorescent cells at invasion fronts one week after transplantation.

Academic Significance and Societal Importance of the Research Achievements

これまでヒト腫瘍の浸潤メカニズムについて,1細胞レベルでの時空間的情報を付加した機能解析を行なった報告はない.本研究で得られる成果は,浸潤というがんの悪性化における初期にして最も重要なステップについての理解を深め,進行がんの根元治療の開発につながると考えられる.

Report

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

    (3 results)

All 2023

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

  • [Journal Article] Genotype-phenotype mapping of a patient-derived lung cancer organoid biobank identifies NKX2-1-defined Wnt dependency in lung adenocarcinoma2023

    • Author(s)
      Ebisudani Toshiki, Hamamoto Junko, Togasaki Kazuhiro, et al.
    • Journal Title

      Cell Reports

      Volume: 42 Issue: 3 Pages: 112212-112212

    • DOI

      10.1016/j.celrep.2023.112212

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] ゲノムを超えろ!生きた癌細胞を使った未来のプレシジョンメディシン 胃がんオルガノイドを用いた腫瘍浸潤モデルの作成2023

    • Author(s)
      戸ヶ崎和博,佐藤俊朗
    • Organizer
      日本癌治療学会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] びまん性胃がんの腫瘍内不均一性モデルの作成2023

    • Author(s)
      戸ヶ崎和博、佐藤俊朗、金井隆典
    • Organizer
      第95回日本胃癌学会総会
    • Related Report
      2022 Research-status Report

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Published: 2022-04-19   Modified: 2025-01-30  

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