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Basic research on the effects of eicosapentaenoic acid metabolites on upper airway inflammation

Research Project

Project/Area Number 20K09754
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 56050:Otorhinolaryngology-related
Research InstitutionShiga University of Medical Science

Principal Investigator

TOJIMA Ichiro  滋賀医科大学, 医学部, 講師 (80567347)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
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)
Keywords17,18-EpETE / 17,18-diHETE / ILC2 / IL-33 / eosinophil / airway epithelial cells / TNF-α / neutrophil / 好中球 / MUC5AC / LPS / 気道上皮細胞 / IL-6 / IL-8 / アレルギー性鼻炎 / 好酸球性副鼻腔炎 / 好中球性炎症 / エイコサペンタエン酸 / 粘液産生
Outline of Research at the Start

上気道の「アレルギー(好酸球性)炎症」と「好中球性炎症」に対する17,18-EpETEとRvE1の抗炎症作用を検討する。培養細胞としてヒト気道上皮細胞、ヒトILC2、鼻茸由来線維芽細胞を用い、IL-33やアルテルナリア、LPSなどを点鼻して作成したマウスモデルを用いて検討する。またそれぞれの受容体にも着目し、免疫組織化学染色やRT-PCR法などを用いて抗炎症作用をもたらす細胞内分子機構の解明を行う。

Outline of Final Research Achievements

17,18-EpETE and its metabolites 17,18-diHETE attenuated human ILC2-derived productions of IL-5 and IL-13 in response to IL-33 through the inhibition of GATA-3. These anti-inflammatory effects on ILC2s may be mediated by the receptors of GPR40 and PPARγ. Intranasal administration of 17,18-EpETE and 17,18-diHETE attenuated IL-33-induced eosinophil infiltrations and mucus productions in mouse nasal epithelium, and the productions of IL-5/IL-13 in lung tissues and BALs.
17,18-EpETE attenuated human airway epithelial cell-derived productions of IL-6, IL-8, and MUC5AC in response to TNF-α. These effects may be mediated by GPR40. Intranasal or intraperitoneal administration of 17,18-EpETE attenuated lipopolysaccharide-induced neutrophil infiltrations and mucus productions in mouse nasal epithelium. Inflammatory cytokine/chemokine productions in lung tissues and BALs was also inhibited. These effects of 17,18-EpETE might apply for eosinophilic and neutrophilic airway inflammatory disorders.

Academic Significance and Societal Importance of the Research Achievements

17,18-EpETEやその代謝物17,18-diHETEは、ヒト生体内で合成される脂質代謝物であるため、安全な治療手段となる可能性を秘めている。今回のわれわれの結果から、17,18-EpETEや17,18-diHETEはIL-33で刺激したヒトILC2からの2型サイトカイン産生を抑制し、これらの点鼻投与はマウスの上気道好酸球炎症を抑制した。またTNF-αで刺激したヒト気管支上皮細胞からの炎症性メディエーターの産生も抑制し、マウスの上気道好中球性炎症に対しても抑制作用を示した。17,18-EpETEは、好酸球性鼻副鼻腔炎や好中球性の上気道炎症などに対する安全な新規治療法となる可能性がある。

Report

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

    (12 results)

All 2023 2022 2021 2020

All Journal Article (5 results) (of which Peer Reviewed: 2 results) Presentation (7 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] 【アレルギー病態におけるILC2の最新知見】ILC2とアレルギー性鼻疾患2023

    • Author(s)
      戸嶋 一郎
    • Journal Title

      アレルギーの臨床

      Volume: 43 Pages: 14-17

    • Related Report
      2022 Annual Research Report
  • [Journal Article] ILC2を介した好酸球性炎症2022

    • Author(s)
      戸嶋 一郎
    • Journal Title

      Nihon Bika Gakkai Kaishi (Japanese Journal of Rhinology)

      Volume: 61 Issue: 1 Pages: 237-239

    • DOI

      10.7248/jjrhi.61.237

    • ISSN
      0910-9153, 1883-7077
    • Related Report
      2022 Annual Research Report
  • [Journal Article] A decreased prevalence of group 2 innate lymphoid cells in blood is associated with good postoperative outcomes in patients with chronic rhinosinusitis2022

    • Author(s)
      Tojima Ichiro、Murao Takuya、Kawakita Kento、Nakamura Keigo、Arai Hiroyuki、Matsumoto Koji、Shimizu Shino、Kouzaki Hideaki、Shimizu Takeshi
    • Journal Title

      Auris Nasus Larynx

      Volume: - Issue: 4 Pages: 540-549

    • DOI

      10.1016/j.anl.2022.11.006

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 17,18-Epoxyeicosatetraenoic Acid Inhibits TNF-α-Induced Inflammation in Cultured Human Airway Epithelium and LPS-Induced Murine Airway Inflammation.2022

    • Author(s)
      1)Shiori Hara, Ichiro Tojima, Shino Shimizu, Hideaki Kouzaki, Takeshi Shimizu.
    • Journal Title

      Am J Rhinol Allergy

      Volume: 36 Issue: 1 Pages: 106-114

    • DOI

      10.1177/19458924211027682

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] 好酸球性副鼻腔炎の治療におけるインフォームド・コンセント2021

    • Author(s)
      戸嶋一郎
    • Journal Title

      MB ENTONI

      Volume: 255 Pages: 17-24

    • Related Report
      2020 Research-status Report
  • [Presentation] Anti-inflammatory effects of epoxygenated eicosapentaenoic acid metabolite on IL-33-induced innate eosinophilic inflammation in upper airway.2022

    • Author(s)
      Ichiro Tojima
    • Organizer
      18th Japan-Korea Joint Meeting of Otorhinolaryngology-Head and Neck Surgery (JKJM2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Anti-inflammatory effects of epoxygenated eicosapentaenoic acid metabolite on IL-33-induced innate eosinophilic inflammation in upper airway2022

    • Author(s)
      Ichiro Tojima, Shiori Hara, Keigo Nakamura, Sayuri Yamamoto, Masatomo Toyama, Hiroyuki Arai, Hideaki Kouzaki, Shino Shimizu, Takeshi Shimizu
    • Organizer
      18th Japan-Korea Joint Meeting of Otorhinolaryngology-Head and Neck Surgery
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Anti-inflammatory effects of 17,18-epoxyeicosatetraenoic acid and its metabolite on IL-33-induced innate eosinophilic inflammation in upper airway2020

    • Author(s)
      Ichiro Tojima, Shiori Hara, Keigo Nakamura, Sayuri Yamamoto, Masatomo Toyama, Hiroyuki Arai, Hideaki Kouzaki, Shino Shimizu, Takeshi Shimizu
    • Organizer
      JSA/WAO joint congress 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 上気道自然型アレルギー炎症におけるω3脂肪酸代謝物の抑制作用2020

    • Author(s)
      戸嶋 一郎、原 思織、山本 小百合、神前 英明、清水 志乃、清水 猛史
    • Organizer
      第38回日本耳鼻咽喉科免疫アレルギー学会
    • Related Report
      2020 Research-status Report
  • [Presentation] 17,18-epoxy-eicosatetraenoic acidとその代謝物による上気道自然型好酸球炎症抑制作用2020

    • Author(s)
      戸嶋 一郎、原 思織、中村 圭吾、山本 小百合、新井 宏幸、神前 英明、清水 志乃、清水 猛史
    • Organizer
      第59回日本鼻科学会
    • Related Report
      2020 Research-status Report
  • [Presentation] 2型自然リンパ球ILC2を介した上気道好酸球炎症に対するエイコサペンタエン酸代謝物を用いた新規治療法の開発2020

    • Author(s)
      戸嶋 一郎
    • Organizer
      第37回滋賀医科大学シンポジウム
    • Related Report
      2020 Research-status Report
  • [Presentation] ω3脂肪酸代謝物 17,18-EpETEによる上気道好中球性炎症抑制作用2020

    • Author(s)
      原思織、戸嶋一郎、神前英明、清水志乃、清水猛史
    • Organizer
      第38回日本耳鼻咽喉科免疫アレルギー学会
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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