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Elucidation of the Pathological Functions of Bronchial Epithelial Cells and Development of Innovative Therapies for Acute Interstitial Pneumonia

Research Project

Project/Area Number 22K08265
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 53030:Respiratory medicine-related
Research InstitutionDokkyo Medical University

Principal Investigator

Tanaka Ayae  獨協医科大学, 医学部, 助教 (30743067)

Co-Investigator(Kenkyū-buntansha) 有馬 雅史  獨協医科大学, 医学部, 教授 (00202763)
倉沢 和宏  獨協医科大学, 医学部, 特任教授 (30282479)
大和田 高義  獨協医科大学, 医学部, 講師 (30456016)
Project Period (FY) 2022-04-01 – 2025-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2024: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2023: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords間質性肺炎 / 気道上皮細胞 / 気道上皮
Outline of Research at the Start

間質性肺炎(ILD)の中で特に肺炎線維症(IPF)の急性増悪による急速進行性(RP)-ILDや膠原病およびCOVID-19で発症するRP-ILDは劇症型で予後不良である.各RP-ILDについて特異的な病態が示唆されるが,発症機序は十分に明らかでない.本研究は様々な原因で発症するRP-ILDに共通する病理メカニズムとして推定される肺胞・気道上皮細胞―免疫系ネットワークについて呼吸器系上皮細胞の2本鎖RNA編集酵素ADAR1の役割に注目し,肺気道上皮細胞におけるADAR1の機能解析により劇症型PR-ILDの病態制御機構の解明と新規治療法の開発を目指す基盤的研究を行う.

Outline of Final Research Achievements

This study aimed to elucidate the pathological significance of bronchial epithelial cells and the functional role of the double-stranded RNA-editing enzyme ADAR1 in the airway epithelium immune system network, which is presumed to be a common pathological mechanism underlying rapidly progressive interstitial lung diseases (RP-ILD) of various etiologies. Using wild-type (WT) mice and airway epithelial cell-specific Adar1-deficient mice (CC10-Adar1-cKO), we analyzed a bleomycin-induced model of idiopathic pulmonary fibrosis (IPF). Our findings demonstrated that bronchial epithelial cells contribute to the pathogenesis of ILD, and that ADAR1 dysfunction exacerbates inflammation-independent progression of IPF.

Academic Significance and Societal Importance of the Research Achievements

本研究はIPFや感染症で発症するRP-ILDの病態に対するII型肺胞上皮細胞とClub細胞の病理的意義の解明を目的とした.我々が樹立したCC10-Adar1-cKOマウスを用いてILDモデルを解析し,気道上皮細胞を介したILDの病態とADAR1機能の関係を初めて示した.今後,本研究を発端として劇症型ILDの難治化病態に共通する新たな核心的病態概念を見出すことが十分に期待される.さらに,劇症型ILDに対する根治的治療の開発に本研究の成果が応用される可能性がある点において社会的意義があると考えられる.

Report

(4 results)
  • 2024 Annual Research Report   Final Research Report ( PDF )
  • 2023 Research-status Report
  • 2022 Research-status Report
  • Research Products

    (7 results)

All 2025 2024 2023 2022

All Journal Article (5 results) (of which Peer Reviewed: 3 results) Presentation (2 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Identifying two pathways to poor prognosis in patients with anti-MDA5 antibodies: insights from prognostic factor and cytokines analysis2025

    • Author(s)
      Shimizu Aya、Kurasawa Kazuhiro、Hiyama Tomoka、Komatsu Sara、Kikuchi Azusa、Yoshida Yuhi、Hasegawa Anna、Miyao Tomoyuki、Tanaka Ayae、Arai Satoko、Maezawa Reika、Arima Masafumi、Ikeda Kei
    • Journal Title

      Arthritis Research & Therapy

      Volume: 27 Issue: 1

    • DOI

      10.1186/s13075-025-03558-z

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Clinical features and risk factors of flare in anti-synthetase syndrome2025

    • Author(s)
      Hasegawa Anna、Kurasawa Kazuhiro、Koike Ryota、Sato Rika、Kikuchi Azusa、Komatsu Sara、Sakaue Yusuke、Aizawa Yuki、Shimizu Aya、Yoshida Yuhi、Hiyama Tomoka、Miyao Tomoyuki、Tanaka Ayae、Arai Satoko、Maezawa Reika、Arima Masafumi、Ikeda Kei
    • Journal Title

      Clinical Rheumatology

      Volume: - Issue: 6 Pages: 2431-2438

    • DOI

      10.1007/s10067-025-07398-9

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Pulmonary and serum cytokine profiles of patients with anti-ARS and anti-MDA5 antibodies2025

    • Author(s)
      Kurasawa Kazuhiro、Arai Satoko、Taniguchi-Namiki Yumeko、Komatsu Sara、Shimizu Aya、Hasegawa Anna、Hiyama Tomoka、Miyao Tomoyuki、Tanaka Ayae、Owada Takayoshi、Hirata Hirokuni、Fukushima Yasutsugu、Arima Masafumi、Maezawa Reika、Ikeda Kei
    • Journal Title

      Journal of Autoimmunity

      Volume: 151 Pages: 103374-103374

    • DOI

      10.1016/j.jaut.2025.103374

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Differences and similarities in cytokine profiles of macrophage activation syndrome in systemic lupus erythematosus and adult-onset Still’s disease2023

    • Author(s)
      Hiyama Tomoka、Kurasawa Kazuhiro、Hasegawa Anna、Miyao Tomoyuki、Tanaka Ayae、Arai Satoko、Arima Masafumi、Maezawa Reika
    • Journal Title

      Clinical and Experimental Medicine

      Volume: 23 Issue: 7 Pages: 3407-3416

    • DOI

      10.1007/s10238-023-00988-4

    • Related Report
      2023 Research-status Report
  • [Journal Article] Changing patterns of pulmonary abnormalities in rheumatoid arthritis2023

    • Author(s)
      Tanaka Ayae、Kurasawa Kazuhiro、Soda Sayo、Takamura Yuta、Miyao Tomoyuki、Hasegawa Anna、Hiyama Tomoka、Yamazaki Ryutaro、Arai Satoko、Owada Takayoshi、Arima Masafumi、Arakawa Hiroaki、Maezawa Reika
    • Journal Title

      Respiratory Investigation

      Volume: 61 Issue: 1 Pages: 27-39

    • DOI

      10.1016/j.resinv.2022.09.002

    • Related Report
      2023 Research-status Report
  • [Presentation] 二本鎖RNA編集酵素ADAR1のマクロファージ特異的欠損マウスは抗MDA5抗体陽性の劇症型肺炎を発症する2024

    • Author(s)
      田中 彩絵, 大和田 高義, 小松 紗良, 長谷川 杏奈, 前澤 玲華, 平田 博国, 福島 康次, 倉沢 和宏, 池田 啓, 有馬 雅史
    • Organizer
      日本リウマチ学会総会・学術集会プログラム・抄録集68回
    • Related Report
      2024 Annual Research Report
  • [Presentation] ADAR1 in bronchial epithelial cells is involved in the airway mucosal immune system in a mouse model of asthma2022

    • Author(s)
      田中彩絵
    • Organizer
      日本免疫学会
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research

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Published: 2022-04-19   Modified: 2026-01-16  

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