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Pathophysiology of Post-Traumatic Lung Injury through Single-Cell Analysis

Research Project

Project/Area Number 21K16585
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 55060:Emergency medicine-related
Research InstitutionTokyo Medical and Dental University

Principal Investigator

Senda Atsushi  東京医科歯科大学, 東京医科歯科大学病院, 助教 (00728040)

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 2023: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2022: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2021: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords外傷出血性モデル / 虚血再還流 / 多臓器不全 / エクソソーム / 外傷出血モデル / 脂質解析 / mRNA解析 / タンパク解析 / 多臓器障害 / シングルセル / プロテオーム解析 / miRNA
Outline of Research at the Start

交通事故や転落など外傷による死亡は若者の死因として常に上位にあり、社会的に大きな問題となっている。初期治療に成功しても、急性肺障害や多臓器障害などを続発し致死的な病態となる事が知られており現時点で有効な治療法はない。
本病態は過剰な免疫反応が原因であると考えられている。これまでの研究では腸管で産生された炎症物質がこの原因とされている.
本研究ではこのような炎症物質がどのような機序で産生され、全身的な炎症に結びつくのかを解明することを目的とするものである.

Outline of Final Research Achievements

Intestinal ischemia-reperfusion injury leads to proinflammatory responses via gut-derived mediators, and accumulating evidence suggests that exosomes secreted by intestinal epithelial cells are involved in the development of systemic inflammation. Our study elucidated the multiple changes that simultaneously occur in exosomes after ischemic stimulation. We found that lipid metabolism-related protein expression was upregulated, miRNA levels were slightly altered, and unsaturated fatty acid-containing lysophosphatidylcholine concentration increased after hypoxia and reoxygenation injury; this suggested that the changes in exosomal components associated with ischemia-reperfusion injury activate inflammation, including the NF-κB pathway. Based on the above, we are currently gathering data on the relation between each cell component and the provoked inflammation utilizing the techniques of single-cell analysis.

Academic Significance and Societal Importance of the Research Achievements

我々の研究成果は腸管虚血が全身性の炎症をきたす病態の解明に寄与をしました。脂質解析、タンパク定量、mRNAについて包括的な解析を行い、提示することにより本病態に関与するあらゆる仮説に対して有益な基礎的な情報を提示しました。また、代謝ネットワークに関するin sillicoな解析を行うことにより、上記で得られたデータの持つ意義について提示を行いました。以上のように個体レベルで起きる変化について得られた情報をより詳細に解析するため細胞レベルでの変化を調べるための実験系を確立し、今後より詳細な病態解明に繋げる手法を開発しました。

Report

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

    (3 results)

All 2023 2022 2021

All Journal Article (3 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 3 results,  Open Access: 2 results)

  • [Journal Article] Profiles of lipid, protein and microRNA expression in exosomes derived from intestinal epithelial cells after ischemia-reperfusion injury in a cellular hypoxia model2023

    • Author(s)
      Senda Atsushi、Kojima Mitsuaki、Watanabe Arisa、Kobayashi Tetsuyuki、Morishita Koji、Aiboshi Junichi、Otomo Yasuhiro
    • Journal Title

      PLOS ONE

      Volume: 18 Issue: 3 Pages: 1-13

    • DOI

      10.1371/journal.pone.0283702

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Development of practical triage methods for critical trauma patients: machine-learning algorithm for evaluating hybrid operation theatre entry of trauma patients (THETA)2022

    • Author(s)
      Senda Atsushi、Endo Akira、Kinoshita Takahiro、Otomo Yasuhiro
    • Journal Title

      European Journal of Trauma and Emergency Surgery

      Volume: 48 Issue: 6 Pages: 4755-4760

    • DOI

      10.1007/s00068-022-02002-0

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Vagus nerve stimulation modulates arachidonic acid production in the mesenteric lymph following intestinal ischemia-reperfusion injury2021

    • Author(s)
      Nakatsutsumi Keita、Morishita Koji、Yagi Masayuki、Doki Sanae、Watanabe Arisa、Ikegami Nahoko、Kobayashi Testuyuki、Kojima Mitsuaki、Senda Atsushi、Yamamoto Kouhei、Aiboshi Junichi、Coimbra Raul、Otomo Yasuhiro
    • Journal Title

      Journal of Trauma and Acute Care Surgery

      Volume: 91 Issue: 4 Pages: 700-707

    • DOI

      10.1097/ta.0000000000003345

    • Related Report
      2021 Research-status Report
    • Peer Reviewed

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

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