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Establishment of relapse prediction of neuromyelitis optica spectrum disorders focusing on organ specificity of extracellular vesicles

Research Project

Project/Area Number 21K07412
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 52020:Neurology-related
Research InstitutionNiigata University

Principal Investigator

SAJI Etsuji  新潟大学, 医歯学総合病院, 助教 (00706418)

Co-Investigator(Kenkyū-buntansha) 河内 泉  新潟大学, 医歯学系, 准教授 (40432083)
清水 宏  新潟大学, 脳研究所, 准教授 (40608767)
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: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords視神経脊髄炎 / 細胞外小胞 / エクソソーム / エクソソーム /
Outline of Research at the Start

視神経脊髄炎関連疾患(NMOSD)は中枢神経系自己免疫疾患の代表的疾患である.NMOSD再発予防のためステロイドや免疫抑制剤による免疫治療が行われているが,再発を抑制できない症例が存在する.個々の患者において再発リスクおよびどの薬剤が最適であるかを予測するバイオマーカーは存在していない.
本研究では,細胞外小胞の臓器特異性に着目して再発および治療反応性に関わる分子マーカーを探索し, NMOの個別化医療の確立を目指すことを目的とする.

Outline of Final Research Achievements

Neuromyelitis optica spectrum disorder (NMOSD) is an autoimmune CNS disease with autoantibodies against aquaporin 4 water channels expressed on astrocytes. The present study did not identify specific exosomes in the patients with NMOSD. Neuropathological analysis revealed that activated neutrophils and IL-17-secreting T cells accumulate in the early and early active lesions of NMO, and these cells are involved in NMO lesion expansion. We also found that tissue-resident memory T cells cause active lesions by expressing cytotoxic granules, and that FOXP3-positive regulatory T cells suppress inflammation.

Academic Significance and Societal Importance of the Research Achievements

視神経脊髄炎関連疾患において、病変のステージによって、活性化好中球、IL-17産生T細胞、細胞傷害性顆粒を発現した組織常在性記憶T細胞の集積が炎症の増幅と病変の拡大に関与することを見出した。また、炎症を制御するFOXP3陽性調節性T細胞が病巣を鎮静化させることを明らかにした。これらの細胞群を制御しうるエクソソームを含む血液バイオマーカーを明らかにしていくことで、個々の患者の再発の予兆をとらえ、より適切な治療選択につなげることが期待できる。

Report

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

    (9 results)

All 2024 2022 2021

All Journal Article (3 results) (of which Peer Reviewed: 3 results) Presentation (6 results) (of which Invited: 1 results)

  • [Journal Article] Stage-dependent immunity orchestrates AQP4 antibody-guided NMOSD pathology: a role for netting neutrophils with resident memory T cells in situ2024

    • Author(s)
      Nakajima A, Yanagimura F, Saji E, Shimizu H, Toyoshima Y, Yanagawa K, Arakawa M, Hokari M, Yokoseki A, Wakasugi T, Okamoto K, Takebayashi H, Fujii C, Itoh K, Takei YI, Ohara S, Yamada M, Takahashi H, Nishizawa M, Igarashi H, Kakita A, Onodera O, Kawachi I.
    • Journal Title

      Acta Neuropathologica

      Volume: 147 Issue: 1 Pages: 76-76

    • DOI

      10.1007/s00401-024-02725-x

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Acute respiratory failure caused by brainstem demyelinating lesions in an older patient with an atypical relapsing autoimmune disorder2024

    • Author(s)
      Hongo Shoko、Shimizu Hiroshi、Saji Etsuji、Nakajima Akihiro、Okamoto Kouichirou、Kawachi Izumi、Onodera Osamu、Kakita Akiyoshi
    • Journal Title

      Neuropathology

      Volume: - Issue: 1 Pages: 3-12

    • DOI

      10.1111/neup.12976

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Visual outcome of aquaporin-4 antibody-positive optic neuritis with maintenance therapy.2021

    • Author(s)
      Ueki S, Hatase T, Kiyokawa M, Kawachi I, Saji E, Onodera O, Fukuchi T, Igarashi H.
    • Journal Title

      Jpn J Ophthalmol.

      Volume: 65 Issue: 5 Pages: 699-703

    • DOI

      10.1007/s10384-021-00858-0

    • NAID

      40022680433

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] AQP4抗体陽性視神経脊髄炎関連疾患における脳幹小脳症状と病変分布2022

    • Author(s)
      佐治越爾, 中島章博, 栁川香織, 小野寺理, 河内泉
    • Organizer
      第63回日本神経学会学術大会
    • Related Report
      2022 Research-status Report
  • [Presentation] Pros & Cons 2022年の多発性硬化症診療を考える. Pros「#2. 多発性硬化症は神経変性疾患である」2022

    • Author(s)
      佐治 越爾, 河内泉
    • Organizer
      第34回日本神経免疫学会学術研究集会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 脊髄病変で再発した視神経脊髄炎関連疾患の臨床的特徴2022

    • Author(s)
      佐治越爾, 中島章博, 栁川香織, 小野寺理, 河内泉
    • Organizer
      第34回日本神経免疫学会学術研究集会
    • Related Report
      2022 Research-status Report
  • [Presentation] 視神経脊髄炎関連疾患における脳幹・小脳病変の臨床的特徴2021

    • Author(s)
      佐治 越爾, 中島 章博, 柳川 香織, 清水 宏, 岡本 浩一郎, 柿田 明美, 小野寺 理, 河内 泉
    • Organizer
      第33回日本神経免疫学会学術集会
    • Related Report
      2021 Research-status Report
  • [Presentation] Chronic inflammation and disease progression in multiple sclerosis based on a neuropathological view2021

    • Author(s)
      Saji Etsuji, Kawachi Izumi
    • Organizer
      第33回日本神経免疫学会学術集会
    • Related Report
      2021 Research-status Report
  • [Presentation] Autoimmune disease comorbidities in patients with neuromyelitis optica spectrum disorder2021

    • Author(s)
      Etsuji Saji, Akihiro Nakajima, Takahiro Wakasugi, Fumihiro Yanagimura, Kaori Yanagawa, Masatoyo Nishizawa, Osamu Onodera, Izumi Kawachi
    • Organizer
      第62回日本神経学会学術大会
    • Related Report
      2021 Research-status Report

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

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