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The analysis for clinical utility and role of the myeloperoxidase-deoxyribonucleic acid complex in otitis media with antineutrophil cytoplasmic antibody-associated vasculitis

Research Project

Project/Area Number 20K09744
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 56050:Otorhinolaryngology-related
Research InstitutionHokkaido University

Principal Investigator

Morita Shinya  北海道大学, 大学病院, 講師 (80443951)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
KeywordsANCA関連血管炎性中耳炎 / 好中球細胞外トラップ / バイオマーカー / 診断 / 疾患活動性 / 耳鼻咽喉科学 / 耳科学 / 中耳炎 / 血管炎 / NETs / MPO-DNA
Outline of Research at the Start

抗好中球細胞質抗体(ANCA)関連血管炎性中耳炎(OMAAV)は、通常の中耳炎との鑑別が困難である。この要因として、血液学的検査でANCA陰性を示す例や病理組織学的検査で特徴的な血管炎像を認めない例が比較的多いということが挙げられる。近年では、好中球細胞外トラップ(NETs)が、ANCA産生や血管炎の発症・活動性に重要な役割を果たすと報告されている。しかし、中耳腔においてはその存在を未だに確認できていない。OMAAV症例の血液および中耳貯留液を用いてNETsの存在を確認し、ラットを用いてNETs導入によるOMAAVの発症を確認することで、その発症機序を解明する。

Outline of Final Research Achievements

This analysis revealed that neutrophil extracellular traps (NETs) formation was identified in all patients with otitis media with antineutrophil cytoplasmic antibody-associated vasculitis (OMAAV). The levels of NETs in the middle ear fluid from patients with systemic as well as localized forms of OMAAV were elevated in comparison to those in the middle ear fluid from patients with otitis media with effusion. Excessive formation of NETs has been suggested to be involved in the pathogenesis of OMAAV. It is noteworthy that the levels of NETs were elevated regardless of serum ANCA status. Therefore, the detection and quantification of NETs in the otitis media fluid may aid in providing a definite diagnosis of OMAAV.

Academic Significance and Societal Importance of the Research Achievements

ANCA関連血管炎症候群の初期段階として、中耳炎のみを呈している段階での治療が臨床的には重要であるにも関わらず、その診断に難渋するために実際には治療が遅れるケースが珍しくない。本研究にて、中耳腔における好中球細胞外トラップ(NETs)の形成はANCA関連血管炎性中耳炎(OMAAV)の病態に関与し、中耳貯留液におけるNETs発現量を定量化することは、OMAAVを診断する上で有用性が高いことが示唆された。OMAAVに対する早期診断や治療のモニタリングの指標として用いることで、死亡率低減、難聴悪化の防止などANCA関連血管炎症候群全体の克服に向けたアプローチが可能になるという意義を持つ。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (12 results)

All 2023 2022 2021 2020

All Journal Article (2 results) (of which Peer Reviewed: 1 results) Presentation (10 results) (of which Int'l Joint Research: 4 results,  Invited: 1 results)

  • [Journal Article] ANCA関連血管炎性中耳炎の診断と治療2021

    • Author(s)
      森田 真也、中丸 裕爾
    • Journal Title

      臨床免疫・アレルギー科

      Volume: 76 Pages: 1-5

    • Related Report
      2021 Research-status Report
  • [Journal Article] The Quantification of Extracellular Trap Cell Death-Derived Products as Diagnostic Biomarkers for Otitis Media With Antineutrophil Cytoplasmic Antibody-Associated Vasculitis and Eosinophilic Otitis Media2021

    • Author(s)
      Morita Shinya、Nakamaru Yuji、Fukuda Atsushi、Fujiwara Keishi、Suzuki Masanobu、Hoshino Kimiko、Honma Aya、Homma Akihiro
    • Journal Title

      Otology & Neurotology

      Volume: 43 Issue: 3 Pages: e337-e343

    • DOI

      10.1097/mao.0000000000003431

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] Cochlear implantation in otitis media with antineutrophil cytoplasmic antibody-associated vasculitis2023

    • Author(s)
      Shinya Morita, Atsushi Fukuda, Kimiko Hoshino, Akihiro Homma
    • Organizer
      16th Congress of the European Federation of Audiology Societies
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Neutrophil extracellular trap formation and deoxyribonuclease I activity in patients with otitis media with antineutrophil cytoplasmic antibody-associated vasculitis2023

    • Author(s)
      Shinya Morita, Yuji Nakamaru, Atsushi Fukuda, Keishi Fujiwara, Akihiro Homma
    • Organizer
      The 20th ASEAN ORL-HNS Congress in conjunction with the 26th VIETNAMESE ORL-HNS CONGRESS
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ANCA関連血管炎性中耳炎におけるNETs発現とDNaseI活性2023

    • Author(s)
      森田 真也、中丸 裕爾、干野 季美子、福田 篤、本間 明宏
    • Organizer
      第124回 日本耳鼻咽喉科頭頸部外科学会総会・学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] The diagnostic utility of extracellular trap cell death-derived products as biomarkers for otitis media with antineutrophil cytoplasmic antibody-associated vasculitis2023

    • Author(s)
      Morita Shinya, Nakamaru Yuji, Fukuda Atsushi, Homma Akihiro
    • Organizer
      15th Asia Oceania ORL-HNS CONGRESS
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] ANCA関連血管炎性中耳炎におけるNETosis解析2022

    • Author(s)
      森田 真也、中丸 裕爾、干野 季美子、福田 篤、本間 明宏
    • Organizer
      第32回 日本耳科学会総会・学術講演会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] The diagnostic utility of extracellular trap cell death-derived products as biomarkers for otitis media with antineutrophil cytoplasmic antibody-associated vasculitis2022

    • Author(s)
      Morita Shinya, Nakamaru Yuji, Fukuda Atsushi, Fujiwara Keishi, Homma Akihiro
    • Organizer
      6th Congress of European ORL-HNS
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] The diagnostic utility of extracellular trap cell death-derived products as biomarkers for OMAAV2022

    • Author(s)
      Shinya Morita, Yuji Nakamaru, Atsushi Fukuda, Kimiko Hoshino, Keishi Fujiwara, Kan Kishibe, Naohiro Yoshida, Akihiro Homma
    • Organizer
      7th East Asian Symposium on Otology
    • Related Report
      2021 Research-status Report
  • [Presentation] ANCA関連血管炎性中耳炎におけるNETosis検出法の比較2021

    • Author(s)
      森田 真也、中丸 裕爾、干野 季美子、福田 篤、本間 明宏
    • Organizer
      第122回 日本耳鼻咽喉科学会通常総会・学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] ANCA関連血管炎性中耳炎におけるELISA法によるNETs測定の検討2021

    • Author(s)
      森田 真也、中丸 裕爾、干野 季美子、福田 篤、本間 明宏
    • Organizer
      第31回 日本耳科学会総会・学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] ANCA関連血管炎性中耳炎における好中球細胞外トラップ測定と臨床応用2020

    • Author(s)
      森田 真也
    • Organizer
      第30回 日本耳科学会総会・学術講演会
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2025-01-30  

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