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Translational research of ischemia reperfusion injury after lung transplantation from donation after circulatory death

Research Project

Project/Area Number 20KK0203
Research Category

Fund for the Promotion of Joint International Research (Fostering Joint International Research (B))

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 55:Surgery of the organs maintaining homeostasis and related fields
Research InstitutionOkayama University

Principal Investigator

Okazaki Mikio  岡山大学, 医歯薬学域, 准教授 (50467750)

Co-Investigator(Kenkyū-buntansha) 坂上 倫久  愛媛大学, 医学系研究科, 講師(特定教員) (20709266)
豊岡 伸一  岡山大学, 医歯薬学域, 教授 (30397880)
塩谷 俊雄  岡山大学, 医学部, 客員研究員 (90851246)
田中 真  岡山大学, 大学病院, 助教 (20831308)
Project Period (FY) 2020-10-27 – 2025-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥18,720,000 (Direct Cost: ¥14,400,000、Indirect Cost: ¥4,320,000)
Fiscal Year 2023: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2022: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2021: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2020: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Keywords肺移植 / 虚血再灌流障害 / 心停止ドナー / 脳死ドナー / NR4A1 / 心停止ドナーからの肺移植
Outline of Research at the Start

DCDからの肺移植後のIRIの分子メカニズムは不明な部分が多く、この解明および治療が可能になれば、本邦での臨床応用が間近となり、ドナー不足の解消に繋がる。これまで我々は、申請者が世界で初めて開発したマウス肺移植モデルを応用し、DCDからの肺移植後のIRIは生体・脳死肺移植後のIRIとは異なった病態であること示してきた。次の段階としてヒトでの検討が重要な鍵となる。DCDからの肺移植で先進的なスペインPuerta de Hiello大学病院とヒト検体を用いた国際共同研究で、マウスで得た知見をヒトに展開することで、DCDからの肺移植後のIRIのメカニズム解明と治療法の確立を目指す。

Outline of Final Research Achievements

In Japan, lungs from donors after cardiac death (DCD) are not yet in clinical use, as they are prone to graft dysfunction due to ischemia-reperfusion injury (IRI) caused by warm ischemia. It is therefore essential to elucidate their pathophysiology and identify potential therapeutic targets. We conducted a comprehensive gene expression analysis on clinical lung transplant samples from both DCD and brain-dead donors (DBD), collected at Puerta de Hierro University Hospital in Spain. The gene expression profiles were clearly distinct: inflammation-related genes were highly expressed in DBD lungs, whereas genes associated with DNA damage and repair were prominently expressed in DCD lungs. Among these, we identified NR4A1 as a potential therapeutic target. Using a mouse lung transplant model, we demonstrated that knockout of NR4A1 in DCD lungs suppressed IRI.

Academic Significance and Societal Importance of the Research Achievements

我々はマウス肺移植モデルを用いて、未だに不明な部分の多いDCD肺に対する基礎研究を行ってきたが、次の段階としてスペインPuerta de Hiello大学病院と国際共同研究を行った。DCDおよびDBD肺移植後の臨床検体に対して網羅的遺伝子解析を実施し、両者の遺伝子発現パターンは全く異なっていることを明らかにした。これによって、DCD肺移植後のIRIに対しては、DBD肺移植とは異なった治療法が必要であることが示唆された。今回検証したNR4A1以外にもDCD肺移植後のIRIに対する治療標的候補となる遺伝子を多数同定できており、今後のDCD肺移植後のIRIに特化した治療開発に繋げていく。

Report

(6 results)
  • 2024 Annual Research Report   Final Research Report ( PDF )
  • 2023 Research-status Report
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (8 results)

All 2025 2022 Other

All Int'l Joint Research (5 results) Journal Article (3 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 3 results,  Open Access: 3 results)

  • [Int'l Joint Research] マハダオンダ・プエルト・デ・イエーロ大学病院(スペイン)

    • Related Report
      2024 Annual Research Report
  • [Int'l Joint Research] デューク大学(米国)

    • Related Report
      2024 Annual Research Report
  • [Int'l Joint Research] Puerta de Hiello大学(スペイン)

    • Related Report
      2023 Research-status Report
  • [Int'l Joint Research] Puerta de Hiello大学(スペイン)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] Puerta de Hiello大学(スペイン)

    • Related Report
      2021 Research-status Report
  • [Journal Article] Loss of Nr4a1 ameliorates endothelial cell injury and vascular leakage in lung transplantation from circulatory-death donor2025

    • Author(s)
      Kawana Shinichi、Okazaki Mikio、Sakaue Tomohisa、Hashimoto Kohei、Nakata Kentaro、Choshi Haruki、Tanaka Shin、Miyoshi Kentaroh、Ohtani Shinji、Ohara Toshiaki、Sugimoto Seiichiro、Matsukawa Akihiro、Toyooka Shinichi
    • Journal Title

      The Journal of Heart and Lung Transplantation

      Volume: 44 Issue: 2 Pages: 249-260

    • DOI

      10.1016/j.healun.2024.09.028

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Histological Features and Gene Expression Profiling in Lung Transplantation From Donation After Circulatory Death2025

    • Author(s)
      Okazaki Mikio、Sakaue Tomohisa、Tanaka Shin、Kubo Yujiro、Hayashi Tatsuya、Ramil Elvira、Sanchez-Lopez Antonio J.、Coronado Maria Jose、Hoyos Lucas、Romero Alejandra、Toyooka Shinichi、Gomez-de-Antonio David
    • Journal Title

      Archivos de Bronconeumologia

      Volume: 61 Issue: 5 Pages: 299-305

    • DOI

      10.1016/j.arbres.2024.12.015

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Functional Blockage of S100A8/A9 Ameliorates Ischemia Reperfusion Injury in the Lung2022

    • Author(s)
      Nakata Kentaro、Okazaki Mikio、Sakaue Tomohisa、Kinoshita Rie、Komoda Yuhei、Shimizu Dai、Yamamoto Haruchika、Tanaka Shin、Suzawa Ken、Shien Kazuhiko、Miyoshi Kentaroh、Yamamoto Hiromasa、Ohara Toshiaki、Sugimoto Seiichiro、Yamane Masaomi、Matsukawa Akihiro、Sakaguchi Masakiyo、Toyooka Shinichi
    • Journal Title

      Bioengineering

      Volume: 9 Issue: 11 Pages: 673-673

    • DOI

      10.3390/bioengineering9110673

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research

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Published: 2020-10-29   Modified: 2026-01-16  

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