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Basic research to prevent ventilator-induced organ failure targeting "regulated necrosis".

Research Project

Project/Area Number 21K16575
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 55060:Emergency medicine-related
Research InstitutionYokohama City University

Principal Investigator

TAMADA Nao  横浜市立大学, 医学研究科, 客員研究員 (70439181)

Project Period (FY) 2021-04-01 – 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 2022: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2021: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
KeywordsARDS / VILI / ネクローシス / アポトーシス / regulated necrosis / DAMPs / necroptosis
Outline of Research at the Start

人工呼吸はARDSの治療に不可欠な一方,肺傷害や遠隔臓器障害を惹起し患者の予後に影響するが,その主因たる炎症への介入効果は限定的である.申請者はARDSモデルで,細胞内からDAMPsを放出し炎症を増幅させる「制御されたネクローシス」が肺胞上皮細胞死に寄与し,人工呼吸で増悪することを明らかにしたが,炎症は感染防御や組織修復も担うため,人工呼吸による障害の予防には炎症が過剰に増幅される悪循環を断つべきと考えた.本研究は人工呼吸によるARDS肺胞上皮細胞死の「制御されたネクローシス」増強から遠隔臓器障害惹起と悪循環形成までの流れを検証し,「制御されたネクローシス」の介入標的としての概念実証を目指す.

Outline of Final Research Achievements

The purpose of this study was to investigate whether artificial ventilation enhances the “regulated necrosis'' of alveolar epithelial cell death in ARDS and induces distant organ damage and dysfunction. Furthermore, the aim was to examine whether inhibitors targeting “regulated necrosis'' would suppress damage to the lungs and distant organs. High tidal volume ventilation induces apoptosis in alveolar epithelial cells in healthy lungs, but necrosis in alveolar epithelial cells in ARDS lungs. High tidal volume ventilation further promoted necrosis of alveolar epithelial cells and enhances lung injury than low tidal volume ventilation in ARDS lungs. However, high tidal volume ventilation did not further enhance “regulated necrosis.'' Therefore, we have been unable to examine whether inhibitors targeting “regulated necrosis'' suppress damage to the lungs and distant organs.

Academic Significance and Societal Importance of the Research Achievements

ARDS肺において高容量換気が肺胞上皮細胞のネクローシスは進行させるものの,「制御されたネクローシス」の関与を証明できなかったため課題が残る結果となったが,別経路でネクローシスを進行させている可能性を見出した.

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (2 results)

All 2023 2022

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (1 results)

  • [Journal Article] Early alveolar epithelial cell necrosis is a potential driver of COVID-19-induced acute respiratory distress syndrome2023

    • Author(s)
      Tojo Kentaro、Yamamoto Natsuhiro、Tamada Nao、Mihara Takahiro、Abe Miyo、Nishii Mototsugu、Takeuchi Ichiro、Goto Takahisa
    • Journal Title

      iScience

      Volume: 26 Issue: 1 Pages: 105748-105748

    • DOI

      10.1016/j.isci.2022.105748

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] COVID-19によるARDSにおける肺胞上皮細胞死機構と抗DAMPs治療の可能性の検討2022

    • Author(s)
      東條 健太郎,山本 夏啓,玉田 尚,水原 敬洋,阿部 美蓉,後藤 隆久
    • Organizer
      第49回日本集中治療医学会学術集会
    • Related Report
      2021 Research-status Report

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

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