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The prothrombin/MHC II complexes on cell-surface of monocytes is the antigenic targets in antiphospoholipid syndrome

Research Project

Project/Area Number 19K08876
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 54020:Connective tissue disease and allergy-related
Research InstitutionHokkaido University

Principal Investigator

Fujieda Yuichiro  北海道大学, 大学病院, 助教 (70790872)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords抗リン脂質抗体 / 単球 / ミスフォールドタンパク / 抗リン脂質抗体症候群 / 抗原提示 / プロトロンビン
Outline of Research at the Start

本研究では、APSにおいて病原性自己抗体であるaPS/PTの産生機序を明らかにし、新規治療法の確立を目的とする。研究代表者は、aPS/PTがプロトロンビン(PT) /MHC classII 複合体を認識すること、単球がPMA刺激下でPTを合成し、PT/MHC classII 複合体を抗原提示していること、単球と肝臓で合成されるPTとaPS/PTの結合能が異なり、aPS/PTは単球が合成するPTに特異的に結合することを発見した。以上から、単球と肝臓で合成されるPTの違いを明らかにし、単球特異的にPT合成を阻害する新規治療の可能性を考え、検証する。

Outline of Final Research Achievements

1) PMA treated THP-1 cells synthesized PT, which showed stronger binding with aPS/PT compared with non-pathogenic monoclonal anti-PT antibody. 2) aPS/PT binding to PT/MHC II complexes was confirmed in co-stimulated THP-1 cells and cell-surface PT was detected on monocyte in APS patient and aPS/PT binding to the monocyte was confirmed. 3) Cell-surface PT was detected on monocytes in two out of 18 APS patients and aPS/PT binding to the monocytes was confirmed. 4) Immunofluorescence staining, and PLA identified PT/HLA complex expressed on monocyte surface in patients with APS.
5) TF mRNA and protein expression was significantly higher in monocyte cocultured with APS IgG compared with healthy control IgG. 6) When the tests were performed with and without warfarin in a same patient, aPS/PT binding was disappeared without warfarin, indicating that Warfarin may affect the prothrombin expression in patients with APS.

Academic Significance and Societal Importance of the Research Achievements

抗リン脂質抗体症候群(APS)は凝固・線溶タンパクに対する自己抗体により、血栓症または妊娠合併症を生じる疾患である。抗リン脂質抗体(aPL)の抗原はリン脂質ではなく、リン脂質に結合する凝固・線溶タンパクである。新たに提唱されたミスフォールド/HLA複合体に対する抗体の検出は抗リン脂質抗体の新たな検出方法であること、さらにプロトロンビン/HLA複合体が単球で発現している現象は、APSの病態生理の解明に近づいた発見である。さらにワーファリンのみが治療薬としてなぜ有効なのかを間接的に証明できる可能性がある。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (18 results)

All 2022 2021 2020 2019

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Open Access: 1 results) Presentation (11 results) (of which Int'l Joint Research: 6 results,  Invited: 2 results) Book (2 results)

  • [Journal Article] Morbidity and mortality in antiphospholipid syndrome based on cluster analysis: a 10-year longitudinal cohort study2021

    • Author(s)
      Ogata Y, Fujieda Y, Sugawara M, Sato T, Ohnishi N, Kono M, Kato M, Oku K, Amengual O, Atsumi T.
    • Journal Title

      Rheumatology (Oxford)

      Volume: - Issue: 3 Pages: 1331-1337

    • DOI

      10.1093/rheumatology/keaa542

    • Related Report
      2021 Annual Research Report 2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] New insights into the pathogenic mechanisms and treatment of arterial thrombosis in antiphospholipid syndrome2020

    • Author(s)
      Fujieda Y, Amengual O
    • Journal Title

      European Journal of Rheumatology

      Volume: - Issue: 2 Pages: 93-99

    • DOI

      10.5152/eurjrheum.2020.20058

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Factor Xa inhibitors for preventing recurrent thrombosis in patients with antiphospholipid syndrome: a longitudinal cohort study2019

    • Author(s)
      Sato T、Nakamura H、Fujieda Y、Ohnishi N、Abe N、Kono M、Kato M、Oku K、Bohgaki T、Amengual O、Yasuda S、Atsumi T
    • Journal Title

      Lupus

      Volume: 28 Issue: 13 Pages: 1577-1582

    • DOI

      10.1177/0961203319881200

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Has lupus anticoagulant testing had its day?2019

    • Author(s)
      Fujieda Yuichiro、Atsumi Tatsuya
    • Journal Title

      Nature Reviews Rheumatology

      Volume: 15 Issue: 6 Pages: 324-325

    • DOI

      10.1038/s41584-019-0218-6

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Circulating plasmablasts contribute to antiphospholipid antibody production, associated with type I interferon upregulation2019

    • Author(s)
      Hisada RYO、Kato Masaru、Sugawara ERI、Kanda Masatoshi、Fujieda Yuichiro、Oku Kenji、Bohgaki Toshiyuki、Amengual Olga、Horita Tetsuya、Yasuda Shinsuke、Atsumi Tatsuya
    • Journal Title

      Journal of Thrombosis and Haemostasis

      Volume: 17 Issue: 7 Pages: 1134-1143

    • DOI

      10.1111/jth.14427

    • NAID

      120006875078

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] 抗リン脂質抗体症候群患者における新型コロナウイルスワクチン投与後の抗リン脂質抗体プロファイルの変化2022

    • Author(s)
      藤枝雄一郎
    • Organizer
      第16回日本血栓止血学会標準化委員会シンポジウム
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 抗リン脂質抗体症候群におけるトランスレーショナルリサーチ2021

    • Author(s)
      藤枝雄一郎
    • Organizer
      第49回日本臨床免疫学会総会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 抗リン脂質抗体症候群患者における新型コロナウイルスワクチン投与後の抗リン脂質抗体プロファイルの変化2021

    • Author(s)
      藤枝雄一郎
    • Organizer
      第9回学術集会日本抗リン脂質抗体標準化ワークショップ
    • Related Report
      2021 Annual Research Report
  • [Presentation] APSレジストリの進捗2021

    • Author(s)
      藤枝雄一郎
    • Organizer
      第9回学術集会日本抗リン脂質抗体標準化ワークショップ
    • Related Report
      2021 Annual Research Report
  • [Presentation] The prothrombin/MHC class II complexes on procoagulant cells as the novel immune target for pathogenic antiphospholipid antibodies.2020

    • Author(s)
      Fujieda Y, Ohnishi N, Kono M, Kato M, Oku K, Amengual O, Arase H, Atsumi T.
    • Organizer
      The International Society on Thrombosis and Haemostasis 2020 Virtual Congress 2020 virtual congress.
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 単球細胞表面上のプロトロンビン/MHC class II複合体は抗リン脂質抗体の新規対応抗原である2020

    • Author(s)
      藤枝雄一郎、大西直樹、河野通仁、加藤将、奥健志、Olga Amengual、荒瀬尚、渥美達也
    • Organizer
      第42回日本血栓止血学会学術集会
    • Related Report
      2020 Research-status Report
  • [Presentation] Prothrombin/MHC class II complexes on procoagulant cells are novel immune target for pathogenic antiphospholipid antibodies2019

    • Author(s)
      Ohnishi N, Fujieda Y, Kono M, Kato M, Oku K, Bohgaki T, Amengual O, Yasuda S, Hisashi Arase, Atsumi T.
    • Organizer
      16th International Congress on Antiphospholipid Antibodies (ICAPA)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] The prothrombin/MHC class II complexes on procoagulant cells as the novel immune target for pathogenic antiphospholipid antibodies2019

    • Author(s)
      Ohnishi N, Fujieda Y, Kono M, Kato M, Oku K, Bohgaki T, Amengual O, Yasuda S, Hisashi Arase, Atsumi T
    • Organizer
      The International Society on Thrombosis and Hemostasis (ISTH)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Discrimination of intracranial vasculitis from thrombotic antiphospholipid syndrome in lupus patients with antiphospholipid antibodies.2019

    • Author(s)
      Aso K, Fujieda Y, Sato T, Ohnishi N, Kono M, Kato M, Oku K, Amengual O, Yasuda S, Atsumi T
    • Organizer
      16th International Congress on Antiphospholipid Antibodies (ICAPA)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] IgM antiphospholipid antibodies: long term follow-up and thrombotic risk.2019

    • Author(s)
      Sato T, Amengual O, Fujieda Y, Nakamura H, Ohnishi N, Abe N, Kono Michihito, Kato M, Oku K, Bohgaki T, Yasuda S, Atsumi T
    • Organizer
      The International Society on Thrombosis and Hemostasis (ISTH)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Longitudinal efficacy and safety of direct factor Xa inhibitors. in patients with antiphospholipid syndrome.2019

    • Author(s)
      Sato T, Amengual O, Fujieda Y, Nakamura H, Ohnishi N, Abe N, Kono Michihito, Kato M, Oku K, Bohgaki T, Yasuda S, Atsumi T.
    • Organizer
      The 16th International Congress on Antiphospholipid Antibodies
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Book] リウマチ病学テキスト(改訂第3版)2022

    • Author(s)
      藤枝雄一郎
    • Total Pages
      6
    • Publisher
      南江堂
    • Related Report
      2021 Annual Research Report
  • [Book] EBM血液疾患の治療2021-20222021

    • Author(s)
      藤枝雄一郎、渥美達也
    • Total Pages
      8
    • Publisher
      中外医学社
    • Related Report
      2021 Annual Research Report

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Published: 2019-04-18   Modified: 2023-01-30  

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