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Pathogenesis via a novel type 2 alveolar epithelial cell subgroup in COPD

Research Project

Project/Area Number 21H02930
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 53030:Respiratory medicine-related
Research InstitutionJikei University School of Medicine

Principal Investigator

Fujita Yu  東京慈恵会医科大学, 医学部, 准教授 (10737133)

Co-Investigator(Kenkyū-buntansha) 荒屋 潤  東京慈恵会医科大学, 医学部, 教授 (90468679)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2023: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2022: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2021: ¥7,020,000 (Direct Cost: ¥5,400,000、Indirect Cost: ¥1,620,000)
KeywordsCOPD / II型肺胞上皮 / 細胞外小胞 / 2型肺胞上皮 / scRNA-seq
Outline of Research at the Start

II型肺胞上皮細胞(AT2)は、組織幹細胞であり肺胞構造及び機能の恒常性維持で最も重要な細胞である。AT2の機能的異常が慢性閉塞性肺疾患(COPD)や特発性肺線維症(IPF)で報告されているが、機能的多様性の詳細を含め病態における実際の役割は明らかでない。我々はsingle-cell transcriptomic analysisを用いてCOPD肺を解析し、病態解明につながる新しいAT2集団を見出した。本研究では、この新規AT2サブグループのCOPD病態進展における役割と機能的解析を目的とする。本研究の成果は、難治性呼吸器疾患の病態解明とともにAT2を標的とした治療法の開発につながる。

Outline of Final Research Achievements

Type II alveolar epithelial cells (AT2) are cells with heterogeneous morphology, including stemness as stem cells, and changes in AT2 morphological heterogeneity and reduced stemness may be involved in disease progression. We investigated AT2 plasmatic heterogeneity in diseased lungs by single-cell transcriptomic analysis. As a result, we identified an inflammatory AT2 (iAT2) trajectory that differentially transforms into an AT2 population that highly expresses inflammatory molecules. In this study, we will analyze the role of iAT2 in the pathogenesis of COPD and its functional analysis, which will lead to the elucidation of the pathogenesis of intractable respiratory diseases as well as the development of novel AT2-targeted therapies.

Academic Significance and Societal Importance of the Research Achievements

AT2がCOPD病態で重要であることは、従来から報告されているが、AT2の形質の不均一性や新規細胞集団の有無などの詳細は検討されてこなかった。本研究の成果から、iAT2がCOPDの発症や病態に関与する詳細な分子メカニズムが明らかになる。現状、COPDの治療法に関しては、吸入ステロイドや気管支拡張剤などの対処療法しか治療選択肢がない。COPDの肺胞構造破壊につながるAT2の異常を標的とする新たな治療戦略は、難治性呼吸器疾患の新たな治療戦略開発につながる。

Report

(3 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • Research Products

    (5 results)

All 2024 2023 2022

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (2 results) (of which Invited: 2 results)

  • [Journal Article] Mitigation of acute lung injury by human bronchial epithelial cell-derived extracellular vesicles via ANXA1-mediated FPR signaling2024

    • Author(s)
      Fujita Yu、Kadota Tsukasa、Kaneko Reika、Hirano Yuta、Fujimoto Shota、Watanabe Naoaki、Kizawa Ryusuke、Ohtsuka Takashi、Kuwano Kazuyoshi、Ochiya Takahiro、Araya Jun
    • Journal Title

      Communications Biology

      Volume: 7 Issue: 1 Pages: 514-514

    • DOI

      10.1038/s42003-024-06197-3

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Fibroblast-Derived Extracellular Vesicles Induce Lung Cancer Progression in the IPF Microenvironment2023

    • Author(s)
      Fujita Yu、Fujimoto Shota、Miyamoto Atsushi、Kaneko Reika、Kadota Tsukasa、Watanabe Naoaki、Kizawa Ryusuke、Kawamoto Hironori、Watanabe Junko、Utsumi Hirofumi、Wakui Hiroshi、Minagawa Shunsuke、Araya Jun、Ohtsuka Takashi、Ochiya Takahiro、Kuwano Kazuyoshi
    • Journal Title

      American Journal of Respiratory Cell and Molecular Biology

      Volume: online ahead of print Issue: 1 Pages: 34-44

    • DOI

      10.1165/rcmb.2022-0253oc

    • Related Report
      2023 Annual Research Report 2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Anomalous Epithelial Variations and Ectopic Inflammatory Response in Chronic Obstructive Pulmonary Disease2022

    • Author(s)
      Watanabe Naoaki、Fujita Yu、Nakayama Jun、Mori Yutaro、Kadota Tsukasa、Hayashi Yusuke、Shimomura Iwao、Ohtsuka Takashi、Okamoto Koji、Araya Jun、Kuwano Kazuyoshi、Yamamoto Yusuke
    • Journal Title

      American Journal of Respiratory Cell and Molecular Biology

      Volume: 67 Issue: 6 Pages: 708-719

    • DOI

      10.1165/rcmb.2021-0555oc

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Presentation] Development of Extracellular Vesicle-based Therapy for Respiratory Diseases2024

    • Author(s)
      藤田雄
    • Organizer
      第23回日本再生医療学会総会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 細胞外小胞治療用製剤の開発現状と展望2023

    • Author(s)
      藤田雄
    • Organizer
      第10回日本細胞外小胞学会学術集会
    • Related Report
      2023 Annual Research Report
    • Invited

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

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