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Elucidation of the role of S100A8/A9 in pulmonary ischemia-reperfusion injury and development of new therapeutic strategies

Research Project

Project/Area Number 20K09164
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 55040:Respiratory surgery-related
Research InstitutionOkayama University

Principal Investigator

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

Co-Investigator(Kenkyū-buntansha) 大谷 真二  愛媛大学, 医学部付属病院, 准教授 (10770779)
山根 正修  島根大学, 学術研究院医学・看護学系, 教授 (20432643)
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)
山本 寛斉  島根大学, 学術研究院医学・看護学系, 教授 (40467733)
木下 理恵  岡山大学, 医歯薬学域, 助教 (40518297)
杉本 誠一郎  岡山大学, 大学病院, 准教授 (40570148)
阪口 政清  岡山大学, 医歯薬学域, 教授 (70379840)
Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords肺移植 / 虚血再灌流障害 / S100A8 / S100A9 / 抗S100A8/A9中和抗体 / S100
Outline of Research at the Start

申請者らは、経時的かつ網羅的遺伝子発現解析から、肺虚血再灌流障害後に最も早期に過剰発現する遺伝子としてS100A8/A9を見出した。S100A8/A9は、多様な炎症反応の引き金となるため、肺虚血再灌流障害の治療のターゲットとして有望である。本研究では、申請者らが開発したS100A8/A9を標的とした中和抗体を用いて、マウス肺移植モデルにおける肺虚血再灌流障害の抑制効果を検証し、臨床応用に向けたProof of Conceptを確立することを目的とする。A8/A9中和抗体による肺虚血再灌流障害抑制効果の作用機序とともに、中和抗体の最も高い治療効果を示す条件を明らかにする。

Outline of Final Research Achievements

The combination of RNA sequencing and histological investigations revealed that neutrophil-derived S100A8/A9 plays a central role in inflammatory reactions in lung IR injury. In clinical lung transplantation, high plasma S100A8/A9 levels after lung transplantation were found to be associated with poor prognosis and poor CLAD-free survival. Furthermore, the functional blockage of S100A8/A9 by anti-S100A8/A9 mAb ameliorated lung IR injury by reducing neutrophil infiltration, inflammatory molecule expression, and apoptosis in the lung tissue. This antibody could be developed as a potential agent for the prevention and reduction of IR injury in clinical lung transplantation.

Academic Significance and Societal Importance of the Research Achievements

網羅的遺伝子解析や病理組織学的解析などによって、好中球由来のS100A8/A9が肺虚血再灌流障害における炎症反応に中心的な役割を果たしていることが明らかになった。また、臨床肺移植では、肺移植後の血漿S100A8/A9が予後バイオマーカーであることも明らかになった。さらに、マウス肺移植モデルで抗S100A8/A9中和抗体によるS100A8/A9の機能阻害が肺虚血再灌流障害を抑制することを明らかにした。S100A8/A9を標的としたこの抗体が、臨床肺移植における肺虚血再灌流障害の予防および軽減のための薬剤として開発できれば、大きな社会的意義を有する。

Report

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

    (6 results)

All 2023 2022 Other

All Int'l Joint Research (2 results) Journal Article (3 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 3 results,  Open Access: 3 results) Presentation (1 results) (of which Int'l Joint Research: 1 results)

  • [Int'l Joint Research] Duke University(米国)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] Toronto University(カナダ)

    • Related Report
      2023 Annual Research Report
  • [Journal Article] S100A8/A9 as a prognostic biomarker in lung transplantation2023

    • Author(s)
      Nakata Kentaro、Okazaki Mikio、Kawana Shinichi、Kubo Yujiro、Shimizu Dai、Tanaka Shin、Hashimoto Kohei、Suzawa Ken、Shien Kazuhiko、Miyoshi Kentaroh、Yamamoto Hiromasa、Sugimoto Seiichiro、Toyooka Shinichi
    • Journal Title

      Clinical Transplantation

      Volume: 37 Pages: 15006-15006

    • DOI

      10.1111/ctr.15006

    • Related Report
      2023 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
  • [Journal Article] Inhibiting S100A8/A9 attenuates airway obstruction in a mouse model of heterotopic tracheal transplantation2022

    • Author(s)
      Shimizu Dai、Okazaki Mikio、Sugimoto Seiichiro、Kinoshita Rie、Nakata Kentaro、Tanaka Shin、Hashimoto Kohei、Miyoshi Kentaroh、Yamane Masaomi、Matsukawa Akihiro、Sakaguchi Masakiyo、Toyooka Shinichi
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 629 Pages: 86-94

    • DOI

      10.1016/j.bbrc.2022.08.087

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Anti-S100A8/A9 Neutralizing Monoclonal Antibody Ameliorates Lung Injury Induced by Lung Ischemia Reperfusion Injury2022

    • Author(s)
      Kentaro Nakata
    • Organizer
      ISHLT2022 42nd Annual Meeting & Scientific Sessions
    • Related Report
      2022 Research-status Report 2021 Research-status Report
    • Int'l Joint Research

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Published: 2020-04-28   Modified: 2025-01-30  

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