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Discovery of novel nodal antibodies in the central nervous system demyelinating diseases and elucidation of the mechanisms through an optic nerve demyelination model

Research Project

Project/Area Number 23K14783
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 52020:Neurology-related
Research InstitutionInternational University of Health and Welfare

Principal Investigator

Zhang Xu  国際医療福祉大学, トランスレーショナルニューロサイエンスリサーチセンター, 特任助教 (60892669)

Project Period (FY) 2023-04-01 – 2025-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2024: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2023: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords多発性硬化症 / 脱髄疾患 / 視神経脊髄炎 / ランビエ絞輪 / 自己抗体 / ノドパチー / アストログリア / オリゴデンドログリア / 脱髄 / 中枢末梢連合脱髄症 / 中枢神経 / 視神経 / 抗神経抗体
Outline of Research at the Start

私たちはマウス視神経の組織免疫染色法を確立し、既知抗体陰性の中枢脱髄患者28例中10例(36%)で傍絞輪部の120kD膜蛋白と反応するIgG3抗体を発見し、抗原蛋白候補の同定に成功した。抗体陽性例は若年発症、女性優位で、全例が視神経障害を示した。本研究では、既知抗体陰性中枢脱髄患者で視神経組織免疫染色により新規ノド抗体陽性例を同定し臨床像を明らかにする。免疫沈降物の液体クロマトグラフィー・質量分析で同定した抗原候補蛋白のcell-based assay法を確立し、リコンビナント蛋白の吸収試験により責任抗原蛋白を確定する。マウス視神経へのIgG注入によりノド抗体の脱髄機構を解明する。

Outline of Final Research Achievements

In multiple sclerosis (MS), widespread nodal protein loss is observed beyond the areas of demyelination. In this study, we discovered a novel nodal antibody to ATPase Na+/K+ transporting subunit alpha 2/3 (ATP1A2/3) in idiopathic central nervous system inflammatory demyelinating disease (IDD). We developed a live cell-based assay for anti-ATP1A2/3 antibody. We found that anti-ATP1A2/3antibody-positive IDD showed higher frequency of juvenile onset, higher EDSS scores, greater relapse numbers, higher frequency of optic nerve involvement, and higher frequency of long spinal cord lesions than anti-ATP1A2/3 antibody negative MS. Serum glial fibrillary acidic protein levels measured by single molecule array were increased at relapse and progressive phases in anti-ATP1A2/3 antibody-positive IDD, and related to disability. In conclusion, anti-ATP1A2/3 antibody-positive IDD shows greater disability and larger lesions than anti-ATP1A2/3 antibody-negative MS through astroglia damage.

Academic Significance and Societal Importance of the Research Achievements

本研究で初めて中枢神経ノド抗体を発見でき、多発性硬化症で初期からみられる原因不明のノドパチーには自己抗体介在性機序が関わっていることを示すことができた。特に進行型多発性硬化症で、新規発見した抗ATP1A2/3抗体の陽性率が高く、抗体陽性例は重症化しやすいことから、抗体介在性機序が病態の進行に重要であることがわかった。一方、既知抗体が陰性の多発性硬化症以外の脱髄疾患は原因が全く不明であった。そのうち、既知抗体陰性の視神経脊髄炎や中枢末梢連合脱髄症で抗ATP1A2/3抗体が高率陽性になることから、これらの疾患の発症に抗ATP1A2/3抗体が関わっていることを初めて示すことができた。

Report

(3 results)
  • 2024 Annual Research Report   Final Research Report ( PDF )
  • 2023 Research-status Report
  • Research Products

    (12 results)

All 2025 2024 2023

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

  • [Journal Article] Blood Exosome Connexins and Small RNAs Related to Demyelinating Disease Activity2025

    • Author(s)
      Maimaitijiang G, Kira J, Nakamura Y, Watanabe M, Takase EO, Nagata S, Sakoda A, Zhang X, Masaki K, Yamasaki R, Isobe N, Yamaguchi H, Imamura T.
    • Journal Title

      Annals of Clinical and Translational Neurology

      Volume: 12 Issue: 3 Pages: 538-555

    • DOI

      10.1002/acn3.52307

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Anti-LGI4 antibody is a novel juxtaparanodal autoantibody for chronic inflammatory demyelinating polyneuropathy2023

    • Author(s)
      Zhang X, Kira J, Ogata H, Imamura T, Mitsuishi M, Fujii T, Kobayashi M, Kitagawa K, Namihira Y, Ohya Y, Maimaitijiang G, Yamasaki R, Fukata Y, Fukata M, Isobe N, Nakamura Y.
    • Journal Title

      Neurology Neuroimmunology and Neuroinflammation

      Volume: 10(2) Issue: 2 Pages: 1-13

    • DOI

      10.1212/nxi.0000000000200081

    • Related Report
      2023 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Nodal ATP1A2/3 antibody is a new pathogenic marker for juvenile onset NMOSD/CCPD and progressive MS.2024

    • Author(s)
      Xu Zhang, Jun-ichi Kira, Mikio Mitsuishi, Daisuke Tsuchimoto, Guzailiayi Maimaitijiang, Tomohiro Imamura, Ayako Sakoda, Yuri Nakamura.
    • Organizer
      第65回日本神経学会学術大会
    • Related Report
      2024 Annual Research Report
  • [Presentation] Exosome connexin 43-truncated isoforms, 29k and 11k, respectively relate to mitigation of MS and NMO.2024

    • Author(s)
      Jun-ichi Kira, Guzailiayi Maimaitijiang, Ayako Sakoda, Mitsuru Watanabe, Satoshi Nagata, Ezgi Ozdemir Takase, Katsuhisa Masaki, Ryo Yamasaki, Noriko Isobe, Xu Zhang, Tomohiro Imamura, Yuri Nakamura.
    • Organizer
      第65回日本神経学会学術大会
    • Related Report
      2024 Annual Research Report
  • [Presentation] Exosome SNORD37 is a new marker for relapse mitigation in NMO and miR133b is that for progressive MS.2024

    • Author(s)
      Maimaitijiang Guzailiayi, Jun-ichi Kira, Ayako Sakoda, Mitsuru Watanabe, Satoshi Nagata,Ozdemir Ezgi, Katsuhisa Masaki, Ryo Yamasaki, Noriko Isobe, Xu Zhang, Tomohiro Imamura, Yuri Nakamura.
    • Organizer
      第65回日本神経学会学術大会
    • Related Report
      2024 Annual Research Report
  • [Presentation] LGI4抗体陽性autoimmune nodopathy (AN)の臨床スペクトラムと病態機序.2024

    • Author(s)
      張旭,横手顕,迫田礼子,山下謙一郎,満石三喜男,今村友裕,グザリアイ・ママティジャン,緒方英紀,磯部紀子,中村優理,吉良潤一
    • Organizer
      第35回日本末梢神経学会学術集会
    • Related Report
      2024 Annual Research Report
  • [Presentation] ATP1A2/3ノド抗体はseronegative NMOSD/中枢末梢連合脱髄症(CCPD)/進行型MSの新規バイオマーカーである.2024

    • Author(s)
      張旭, 吉良潤一, 満石三喜男, ママティジャン・グザリアイ, 今村友裕, 迫田礼子, 中村優理.
    • Organizer
      第36回日本神経免疫学会学術集会
    • Related Report
      2024 Annual Research Report
  • [Presentation] IgG2 autoantibody relates to IVIg response and onion bulb formation in LGI4+ autoimmune nodopathy2023

    • Author(s)
      Xu Zhang, Jun-ichi Kira, Akira Yokote, Ayako Sakoda, Takayasu Mishima, Yoshio Tsuboi, Ryota Sato, Takashi Kanda, Hidenori Ogata, Noriko Isobe, Masaki Kobayashi, Kazuo Kitagawa, Yukihiro Namihira, Yusuke Ohya, Yuko Fukata, Masaki Fukata, Tomohiro Imamura, Guzailiayi Maimaitijiang, Yuri Nakamura
    • Organizer
      第64回日本神経学会学術大会
    • Related Report
      2023 Research-status Report
  • [Presentation] Exosome GJA1-29k is a blood marker for progressive multiple sclerosis reflecting glial inflammation2023

    • Author(s)
      Guzailiayi Maimaitijiang, Jun-ichi Kira, Ayako Sakoda, Katsuhisa Masaki, Mitsuru Watanabe, Satoshi Nagata, Ezgi Ozdemir, Ryo Yamasaki, Noriko Isobe, Xu Zhang, Tomohiro Imamura, Yuri Nakamura
    • Organizer
      第64回日本神経学会学術大会
    • Related Report
      2023 Research-status Report
  • [Presentation] Serum glial fibrillary acidic protein is useful to predict multiple sclerosis disability progression2023

    • Author(s)
      Jun-ichi Kira, Guzailiayi Maimaitijiang, Yuri Nakamura, Ayako Sakoda, Yoshie Yamato, Yuki Yanagihara, Yasutaka Iwanaga, Ken-ichiro Yamashita, Akira Yokote, Keiko Haro, Shozo Tobimatsu, Xu Zhang, Tomohiro Imamura
    • Organizer
      第64回日本神経学会学術大会
    • Related Report
      2023 Research-status Report
  • [Presentation] Epitope mapping of anti-neurofascin 155 antibodies in a large cohort of autoimmune nodopathy2023

    • Author(s)
      Hidenori Ogata, Amina Abdelhadi, Zhang Xu, Ryo Yamasaki, Jun-ichi Kira, Noriko Isobe
    • Organizer
      第64回日本神経学会学術大会
    • Related Report
      2023 Research-status Report
  • [Presentation] Epitope mapping of anti-neurofascin 155 antibodies in a large cohort of autoimmune nodopathy2023

    • Author(s)
      Hidenori Ogata, Amina Abdelhadi, Zhang Xu, Takumi Tashiro, Ryo Yamasaki, Jun-ichi Kira, Noriko Isob
    • Organizer
      2023 Peripheral Nerve Society Annual Meeting
    • Related Report
      2023 Research-status Report
    • Int'l Joint Research

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Published: 2023-04-13   Modified: 2026-01-16  

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