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Mechanism of ferroptosis-like cell death induced by Vibrio

Research Project

Project/Area Number 18K15147
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 49050:Bacteriology-related
Research InstitutionOkayama University

Principal Investigator

Gotoh Kazuyoshi  岡山大学, 医歯薬学総合研究科, 助教 (20626593)

Project Period (FY) 2018-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
KeywordsVibrio alginolyticus / 細胞死 / 鉄 / ビブリオ / リソソーム / フェロトーシス
Outline of Final Research Achievements

Opportunistic pathogen, Vibrio alginolticus induce cell death via effector VepA in type III secretion system. I found this cell death depends on intracellular ferrous ion, calling this type of cell death ferroptosis. When I transfected recombinant VepA into HeLa cell, I observed cell death that is similar with that by V. alginolyticus infection. In this condition, I treated the cell with ferrous chelater in the cell death induction by VepA-transfection. Unlike the infection experiment, that cell death didn't inhibit by ferrous chelataing. Hence, I deny correlation between VepA-dependent cell death and intracellular ferrous ion. I also examined other possible mechanism of the cell death such as cathepsin, calcium ion, proton and ER stress. However, these factor didn't relate to this cell death. I concluded that novel mechanism hides in VepA-dependent cell death.

Academic Significance and Societal Importance of the Research Achievements

細胞生物学において細胞死は大きくネクローシスとアポトーシスに分けられると考えられてきた。近年、この二分類のみならずさまざまなタイプの細胞死経路が報告されている。病原細菌は宿主であるヒトの細胞に対し多様な細胞死を引き起こしていると考えられるがその多くは未だ謎のままである。本研究成果は病原細菌がカスパーゼ依存的アポトーシスという新しいタイプの細胞死を誘導することを見いだした。細菌学の研究から細胞生物学の新しい知見が得られるという点は、異分野研究が相互に関与することで科学が進歩するという意義がある。本研究成果はその一例と考えられる。

Report

(3 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • Research Products

    (5 results)

All 2021 2020 2019

All Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (4 results)

  • [Journal Article] Export of a Vibrio parahaemolyticus toxin by the Sec and type III secretion machineries in tandem2019

    • Author(s)
      Matsuda S, Okada R, Tandhavanant S, Hiyoshi H, Gotoh K, Iida T, Kodama T
    • Journal Title

      Nature Microbiology

      Volume: - Issue: 5 Pages: 781-788

    • DOI

      10.1038/s41564-019-0368-y

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Vibrio alginolyticusのArcAによるsRNA1発現調節機構の解明2021

    • Author(s)
      美間健彦、Agus Eka Darwinata、後藤和義、山本由弥子、松下治
    • Organizer
      第93回日本細菌学会総会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Regulation of small RNA expression in Vibrio alginolyticus2020

    • Author(s)
      美間健彦、Agus Eka Darwinata、後藤和義、山本由弥子、松下治
    • Organizer
      第92回日本細菌学会総会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Vibrio alginolyticusによるリソソームの破裂を伴う細胞死2019

    • Author(s)
      後藤和義、中居絵梨奈、美間健彦、山本由弥子、横田憲治、松下治
    • Organizer
      第29回生物試料分析科学会学術集会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Vibrio alginolyticusのHapRによるコラゲナーゼ発現調節機構の解明2019

    • Author(s)
      美間健彦、西川裕太郎、中田悠介、波多野直哉、後藤和義、山本由弥子、横田憲治、松下治
    • Organizer
      第91回日本細菌学会総会
    • Related Report
      2019 Annual Research Report

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Published: 2018-04-23   Modified: 2021-02-19  

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