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Pathological analysis of severe asthma focusing on innate lymphoid cells and lipid mediators

Research Project

Project/Area Number 21K08160
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 InstitutionKagoshima University

Principal Investigator

Inoue Hiromasa  鹿児島大学, 医歯学域医学系, 教授 (30264039)

Co-Investigator(Kenkyū-buntansha) 高木 弘一  鹿児島大学, 医歯学総合研究科, 特任助教 (40707866)
町田 健太朗  鹿児島大学, 医歯学総合研究科, 客員研究員 (90597569)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords喘息 / 自然免疫 / 脂質代謝 / PLA2 / 脂質修飾 / 寒冷刺激 / 気管支喘息 / 自然リンパ球 / 脂質 / 糖質
Outline of Research at the Start

喘息の治療は大きく進歩したが、吸入ステロイド薬や抗体医薬などを用いてもコントロール困難な患者が存在する。好酸球性炎症を伴う難治性喘息の病態には2型自然リンパ球の関与が、肥満合併喘息には3型自然リンパ球の関与が注目されている。本研究では、自然リンパ球の分化や活性化への脂質分子の役割に注目して喘息病態の新たな制御機構を解明し、さらには、新たな治療法開発のための情報基盤を築く。

Outline of Final Research Achievements

We studied the association between innate lymphoid cells and lipid metabolism in asthma, focusing on sPLA2G3. In an ovalbumin (OVA)-induced asthma model, sPLA2G3 deficient mice exhibited enhanced airway hyperresponsiveness and eosinophilia compared to wild-type mice. We elucidated that LPA, the final metabolic product of sPLA2g3, suppresses cytokines derived from airway epithelial cells involved in innate immunity and negatively regulates allergen-induced asthmatic responses. In addition, we also studied the role of Death receptor 2 in the pathophysiology of asthma.

Academic Significance and Societal Importance of the Research Achievements

これまでに喘息との関与が明らかにされていなかった脂質代謝に関わるsPLA2G3が、その最終代謝産物であるLPAを介して、喘息における自然免疫反応を抑制することを明らかにした。喘息における自然免疫反応はステロイド抵抗性を誘導し、喘息の難治化に関わることが示されており、今回の研究成果によりsPLA2G3やLPAが難治性喘息における新規治療標的となりうることが示唆され、新規治療薬の開発につながる可能性がある。

Report

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

    (4 results)

All 2024 2023 2022

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

  • [Journal Article] Group III secreted phospholipase A2-driven lysophospholipid pathway protects against allergic asthma2024

    • Author(s)
      Asako Hamu-Tanoue, Koichi Takagi, Yoshitaka Taketomi, Yoshimi Miki, Yasumasa Nishito, Kuniyuki Kano, Junken Aoki, Takahiro Matsuyama, Kiyotaka Kondo, Yoichi Dotake, Hiromi Matsuyama, Kentaro Machida, Makoto Murakami, Hiromasa Inoue
    • Journal Title

      The FASEB Journal

      Volume: 38 Issue: 2

    • DOI

      10.1096/fj.202301976r

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Identification of distinct N-glycosylation patterns on extracellular vesicles from small-cell and non-small-cell lung cancers cells.2022

    • Author(s)
      Kondo Kiyotaka, Harada Yoichiro, Nakano Miyako, Suzuki Takehiro, Fukushige Tomoko, Hanzawa Ken, Yagi Hirokazu, Takagi Koichi, Mizuno Keiko, Miyamoto Yasuhide, Taniguchi Naoyuki, Kato Koichi, Kanekura Takuro, Dohmae Naoshi, Machida Kentaro, Maruyama Ikuro, Inoue Hiromasa
    • Journal Title

      Journal of Biological Chemistry

      Volume: 298(6) Issue: 6 Pages: 101950-101950

    • DOI

      10.1016/j.jbc.2022.101950

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Transient Receptor Potential A1 Channel Contributes to Enhanced Innate Airway Inflammation After Cold-air Exposure2023

    • Author(s)
      Y. Dotake, T. Matsuyama, K. Takagi, H. Matsuyama, K. Machida, H. Inoue
    • Organizer
      American Thoracic Society 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] TRPAl channel mediates cold air-induced aggravation of airway inflammation2022

    • Author(s)
      Dotake Yoichi, Matsuyama Takahiro, Takagi Koichi, Matsuyama Hiromi, Machida Kentaro, lnoue Hiromasa
    • Organizer
      第51回日本免疫学会学術集会
    • Related Report
      2022 Research-status Report

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

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