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Investigation of interferon signature in NMOSD

Research Project

Project/Area Number 20K07759
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 51030:Pathophysiologic neuroscience-related
Research InstitutionOsaka University

Principal Investigator

Tatsusada Okuno  大阪大学, 大学院医学系研究科, 准教授 (00464248)

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: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
KeywordsNMOSD / IFN シグネーチャー / NMO / 視神経脊髄炎 / インターフェロンシグネーチャー / タイプ1インターフェロン
Outline of Research at the Start

全身性エリテマトーデス(SLE)などの自己免疫疾患においてはtype1-interferonの発現が亢進し(IFN signature)、自己抗体の産生や炎症の増幅を介して病態に寄与することが広く知られているが、我々はNMOSD患者においてtype1-interferon関連シグナルが亢進することを見出した。この亢進は脳脊髄病変の合併と相関しておりIFN signature はAQP4抗体産生や中枢神経炎症の増幅を介してNMOSDの病態に関与していると推定される。本研究ではシングルセル解析や動物モデルを駆使してNMOSDにおけるInterferon経路を解明し、病態に基づいた新たなバイオマーカーや治療法開発につなげる。

Outline of Final Research Achievements

Recently accumulating evidence suggests the pivotal role of type 1 interferon (IFN-1) signature in the pathogenesis of neuromyelitis optica spectrum disorder (NMOSD).We found that enhanced IFN-1 induction by cfDNA derived from NMOSD was observed in PBMCs with cofactor of LL37 antimicrobial peptide. DNase treatment, cGAS inhibitor, and Toll-like receptor 9 antagonist efficiently inhibited IFN-1 production. DNA methylation pattern of cfDNA in patients with NMOSD demonstrated that the predominant cellular source of cfDNA was neutrophils. Whole blood transcriptome analysis also revealed neutrophil activation in NMOSD. In addition, enhanced NETosis induction was observed with NMOSD-derived sera, and efficient pharmacologic inhibition of NETosis with dipyridamole was observed.
Our study highlights the previously unrevealed role of cfDNA predominantly released by neutrophil in the induction of IFN-1 signature in NMOSD and further indicate a novel pharmacologic target in NMOSD.

Academic Significance and Societal Importance of the Research Achievements

NMOSDはアクアポリン4抗体が引き起こす疾患であり、近年多数の生物製剤が使用可能になっているが、どのようにして本来出現しないアクアポリン4抗体が出現に至るのかは不明である。本研究によりNMOSDにおける自然免疫系の関与を明らかにできた。NMOSDの根本的な原因解明につながる成果である。

Report

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

    (2 results)

All 2022

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

  • [Journal Article] Cell-Free DNA Derived From Neutrophils Triggers Type 1 Interferon Signature in Neuromyelitis Optica Spectrum Disorder2022

    • Author(s)
      Murata Hisashi、Kinoshita Makoto、Yasumizu Yoshiaki、Motooka Daisuke、Beppu Shohei、Shiraishi Naoyuki、Sugiyama Yasuko、Kihara Keigo、Tada Satoru、Koda Toru、Konaka Hachiro、Takamatsu Hyota、Kumanogoh Atsushi、Okuno Tatsusada、Mochizuki Hideki
    • Journal Title

      Neurology - Neuroimmunology Neuroinflammation

      Volume: 9 Issue: 3

    • DOI

      10.1212/nxi.0000000000001149

    • Related Report
      2022 Annual Research Report 2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 好中球由来セルフリーDNAとNMO2022

    • Author(s)
      村田尚 奥野龍禎
    • Organizer
      神経免疫学会
    • Related Report
      2022 Annual Research Report

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

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