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Mechanisms of muscularis mucosa formation and collapse on gastric organoids derived from human-induced pluripotent stem cell

Research Project

Project/Area Number 20K17048
Research Category

Grant-in-Aid for Early-Career Scientists

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

Principal Investigator

Uehara Keiichiro  神戸大学, 医学部附属病院, 助教 (70710557)

Project Period (FY) 2020-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
KeywordsiPS細胞 / 胃分化誘導 / 粘膜筋板
Outline of Research at the Start

胃癌では、癌細胞は胃粘膜上皮細胞から発生し、直下の粘膜固有層へと浸潤する。胃癌浸潤に関するこれまでの研究は、筋板の破壊に関するものがほとんどであるが、本研究では癌浸潤部で筋板が修復されないことに着目した。まず、ヒトiPS細胞由来胃オルガノイドを用いて、ヒトでの筋板形成に関わる因子を同定する。そして、胃癌手術症例の臨床検体においてその因子の発現と予後や転移との関連を検討し、胃癌における筋板再形成機構破綻を評価することで、胃癌浸潤メカニズムを解明する。

Outline of Final Research Achievements

Human gastric development has not been well studied. The generation of human pluripotent stem cell-derived gastric organoids (hGOs) comprising gastric marker-expressing epithelium without an apparent smooth muscle structure has been reported. We modified previously reported protocols to generate hGOs with muscularis mucosa (MM) from hiPSCs. Time-course analyses revealed that epithelium development occurred prior to MM formation. Sonic Hedgehog (SHH) and TGF-β1 were secreted by the epithelium. HH and TGF-β signal inhibition prevented MM formation. A mechanical property of the substrate promoted MM formation around hGOs. TGF-β signaling was shown to influence the HH signaling and mechanical properties. In addition, clinical specimen findings suggested the involvement of TGF-β signaling in MM regeneration. HH and TGF-β signaling from the epithelium to the stroma and the mechanical properties of the subepithelial environment may influence the emergence of MM in human stomach tissue.

Academic Significance and Societal Importance of the Research Achievements

ヒトiPS細胞由来胃オルガノイドを用いて、粘膜筋板形成に胃上皮由来のヘッジホッグシグナル、TGF-βシグナル、基質の機械的環境が協同的に作用していることを初めて明らかにした。また、TGF-βシグナルは粘膜筋板再生の際にも作用している可能性が示唆された。今後、胃癌において粘膜筋板が再生することなく粘膜下層に浸潤するメカニズムを明らかできる可能性があり、新たな胃癌治療の標的を探索することができるものと考えられる。

Report

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

    (6 results)

All 2022 2021 2020

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (5 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Epithelial-derived factors induce muscularis mucosa of human induced pluripotent stem cell-derived gastric organoids2022

    • Author(s)
      Keiichiro Uehara、Michiyo Koyanagi-Aoi、Takahiro Koide、Tomoo Itoh、Takashi Aoi
    • Journal Title

      Stem Cell Reports

      Volume: 17 Issue: 4 Pages: 820-834

    • DOI

      10.1016/j.stemcr.2022.02.002

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Epithelial-derived SHH, TGF-b signaling and property of substrate orchestrate the muscularis mucosa of the hiPSC-derived gastric organoid2021

    • Author(s)
      Keiichiro Uehara、Michiyo Koyanagi-Aoi、Tomoo Itoh、Takashi Aoi
    • Organizer
      第110回日本病理学会総会
    • Related Report
      2021 Annual Research Report
  • [Presentation] The epithelial-derived factors and mechanical environment induce the muscularis mucosa of the iPSC-derived human gastric organoid2021

    • Author(s)
      Keiichiro Uehara, Michiyo Koyanagi-Aoi, Takashi Aoi
    • Organizer
      ISSCR/JSRM 2021 Tokyo International Symposium
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 上皮由来SHH、TGFβシグナル及び基質の硬度がhiPSC由来胃オルガノイドの粘膜筋板を誘導する2021

    • Author(s)
      上原慶一郎、小柳三千代、伊藤智雄、青井貴之
    • Organizer
      第20回日本再生医療学会
    • Related Report
      2020 Research-status Report
  • [Presentation] 上皮由来SHH、TGFβシグナル及び基質の硬度がhiPSC由来胃オルガノイドの粘膜筋板を誘導する2021

    • Author(s)
      上原慶一郎、小柳三千代、伊藤智雄、青井貴之
    • Organizer
      第110回日本病理学会
    • Related Report
      2020 Research-status Report
  • [Presentation] Epithelial-Derived Factors And Mechanical Property Of Substrate Orchestrate The Emergence Of Muscularis Mucosa Of The Induced Pluripotent Stem Cell- Derived Human Gastric Organoid.2020

    • Author(s)
      Keiichiro Uehara, Michiyo Koyanagi-Aoi, Takashi Aoi
    • Organizer
      ISSCR
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research

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Published: 2020-04-28   Modified: 2023-01-30  

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