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Development of a novel EV treatment for pulmonary fibrosis through induction of lipofibroblast differentiation.

Research Project

Project/Area Number 23K24343
Project/Area Number (Other) 22H03082 (2022-2023)
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeMulti-year Fund (2024)
Single-year Grants (2022-2023)
Section一般
Review Section Basic Section 53030:Respiratory medicine-related
Research InstitutionJikei University School of Medicine

Principal Investigator

Araya Jun  東京慈恵会医科大学, 医学部, 教授 (90468679)

Co-Investigator(Kenkyū-buntansha) 藤田 雄  東京慈恵会医科大学, 医学部, 准教授 (10737133)
Project Period (FY) 2024-04-01 – 2025-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2024: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2023: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2022: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Keywords慢性閉塞性肺疾患 / エクソソーム / lipofibroblast / II型肺胞上皮細胞 / 幹細胞性 / Extracellular vesicle / 特発性肺線維症 / 細胞外分泌小胞顆粒 / metabolic reprograming / 細胞外分泌小顆粒
Outline of Research at the Start

EVは、内包物により細胞間コミュニケーションツールとして働き、分泌細胞の表現型に依存し、病態促進的にも抑制的にも作用しうる。Mesenchymal stem cells (MSC)や、正常気道上皮細胞由来EVは抗線維化作用を示すことが明らかとなっている。Lipofibroblastはニッチ細胞として働き、液性因子によりAT2の分化と恒常性を制御する線維芽細胞であり、近年代謝調整剤による誘導と肺線維化抑制効果が報告されている。今回、代謝調整剤で培養肺線維芽細胞から分化誘導したlipofibroblast由来EVによる、新規呼吸器疾患治療法開発を目的とした検討を行う。

Outline of Final Research Achievements

The function of alveolar type II epithelial cells (AT2 cells), which serve as tissue stem cells, plays a pivotal role in the pathogenesis of chronic obstructive pulmonary disease (COPD). Lipofibroblasts (LPFs), which reside adjacent to AT2 cells, support their function. Exosomes derived from LPFs (LPF-EVs) were shown to attenuate cellular senescence and inflammatory responses in lung epithelial cells, and also exhibited antifibrotic effects by suppressing myofibroblast differentiation. LPF-EVs contain L-type amino acid transporter 1 (LAT1), which enhances AT2 cell stemness;including viability, colony-forming ability, and proliferation via leucine transport. Furthermore, administration of LPF-EVs ameliorated COPD-like pathologies in a cigarette smoke-exposed mouse model, suggesting their potential as a novel regenerative therapeutic strategy.

Academic Significance and Societal Importance of the Research Achievements

疫学調査から約500万人の患者がおり、年間約1万6千人が死亡するCOPDの病態解明と新規治療法の開発は喫緊の課題である。肺のシングルセルトランスクリプトーム解析により、グルコース、脂質、アミノ酸など代謝異常の病態への関与が示された。LPF-EVsは、上皮細胞の老化や炎症を抑制に加え、AT2幹細胞性の改善作用を示した。AT2細胞はCOPD病態制御で中心的な役割を果たし、LPF-EVsはAT2細胞の幹細胞性の回復を含むCOPDの様々な病態に対応する新たな治療戦略としての可能性が示された。COPD病態を規定する複雑な細胞間相互作用の理解の進展と、病態進展を抑制する新規治療法開発の可能性が示された。

Report

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

    (5 results)

All 2023 2022

All Presentation (5 results) (of which Int'l Joint Research: 2 results)

  • [Presentation] Lipofibroblast由来細胞外小胞を用いた肺線維症に対する治療効果の検討2023

    • Author(s)
      藤本祥太、藤田雄、荒屋潤、桑野和善
    • Organizer
      第63回呼吸器学会学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Lipofibroblast derived-extracellular vesicles attenuate cigarette smoke-induced lung injury2023

    • Author(s)
      S. Fujimoto, Y. Fujita, N. Watanabe, S. Matsubayashi, H. Kawamoto, D. Takekoshi, S. Ito, S. Minagawa, H. Hara, J. Araya, K. Kuwano
    • Organizer
      ERS congress 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Lipofibroblast由来細胞外小胞を用いた慢性閉塞性肺疾患に対する新規治療法の開発2023

    • Author(s)
      藤本祥太、藤田雄、渡邉直昭、犬養舜、西岡彩子、平野悠太、松林沙知、竹越大輔、伊藤三郎、皆川俊介、原弘道、荒屋潤
    • Organizer
      第10回細胞外小胞学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Lipofibroblast derived-extracellular vesicles attenuate cigarette smoke-induced lung injury.2023

    • Author(s)
      Shota Fujimoto, Yu Fujita, Jun Araya, Kazuyoshi Kuwano
    • Organizer
      2023 Asia Pacific Societies for Extracellular Vesicles (APSEV) Conference
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 線維芽細胞由来細胞外小胞を用いた肺線維化抑制効果の検討.2022

    • Author(s)
      藤本祥太、藤田雄、金子麗華、荒屋潤、桑野和善
    • Organizer
      第9回日本細胞外小胞学会学術集会
    • Related Report
      2022 Annual Research Report

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

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