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2012 Fiscal Year Annual Research Report

抗プロトロンビン自己抗体の病原性の分子生物学的検討

Research Project

Project/Area Number 22591074
Research InstitutionHokkaido University

Principal Investigator

渥美 達也  北海道大学, 医学(系)研究科(研究院), 教授 (20301905)

Project Period (FY) 2010-04-01 – 2013-03-31
Keywords血栓症 / 自己免疫 / ループスアンチコアグラント
Research Abstract

抗リン脂質抗体症候群(APS)は血栓性疾患である。これまでの研究によって、ホスファチジルセリン依存性抗プロトロンビン抗体(aPS/PT)がAPSの病態に関わっている病原性自己抗体であることがわかってきた。とりわけ、β2-グリコプロテインI依存性抗カルジオリピン抗体のひきおこす血栓病態と共通すると考えられる向血栓細胞の活性化について、各種のin vitroモデルで確認されたところである。しかしながら、aPS/PTが刺激を細胞内部に伝達する受容体については不明であった。そこでプロトロンビンおよびaPS/PTの結合に関与する分子を同定することを目的とした。【方法】FLAGタグ付加リコンビナントヒトプロトロンビン(rhFLAG-PT)を用い、RAW264.7細胞膜上のプロトロンビン結合候補タンパクをプルダウンアッセイでスクリーニングし、MALDI-TOFを用いて測定してマスフィンガープリンティング法によりデータベースを検索した。候補タンパクとプロトロンビンとの結合は、cotransfection assay、酵素免疫測定法(ELISA)、表面プラズモン共鳴(SPR)で確認した。【結果】質量分析により糖転移酵素であるRibophorinII(RPN2)がプロトロンビン結合タンパクとして同定された。候補タンパクとプロトロンビンとの結合は、cotransfection assay では確認できたが、その親和性をSPRで測定するには至らなかった。RPN2が細胞表面に出現しているという報告がなかったので、抗RPN2抗体を用いたフローサイトメトリー、免疫染色などにより、RPN2の細胞表面の存在を示した。【結論】プロテオミクス解析からプロトロンビン結合タンパクの候補としてRPN2が同定されたが、同分子の病態における関与は今後の研究によって証明されるであろう。

Current Status of Research Progress
Reason

24年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

24年度が最終年度であるため、記入しない。

  • Research Products

    (27 results)

All 2013 2012

All Journal Article (23 results) (of which Peer Reviewed: 23 results) Presentation (1 results) (of which Invited: 1 results) Book (3 results)

  • [Journal Article] Predominant prevalence of arterial thrombosis in Japanese patients with antiphospholipid syndrome.2013

    • Author(s)
      Fujieda Y
    • Journal Title

      Lupus

      Volume: 21(14) Pages: 1506-1514

    • DOI

      10.1177/0961203312458469.Epub 2012 Aug 30.

    • Peer Reviewed
  • [Journal Article] A merged presentation of clinical and radiographic data using probability plots in a clinical trial, the JESMR study.2013

    • Author(s)
      Kameda H
    • Journal Title

      Ann Rheum Dis

      Volume: 72 Pages: 310-312

    • DOI

      10.1136/annrheumdis-2012-201804. Epub 2012 Sep 12.

    • Peer Reviewed
  • [Journal Article] Elevation of KL-6 serum levels in clinical trials of tumor necrosis factor inhibitors in patients with rheumatoid arthritis: a report from the Japan College of Rheumatology Ad Hoc Committee for Safety of Biological DMARDs.2013

    • Author(s)
      Harigai M
    • Journal Title

      Mod Rheumatol

      Volume: 23 Pages: 284-296

    • DOI

      10.1007/s10165-012-0657-2. Epub 2012 May 17.

    • Peer Reviewed
  • [Journal Article] A retrospective study of serum KL-6 levels during treatment with biological disease-modifying antirheumatic drugs in rheumatoid arthritis patients: a report from the Ad Hoc Committee for Safety of Biological DMARDs of the Japan College of Rheumatology.2013

    • Author(s)
      Takamura A
    • Journal Title

      Mod Rheumatol

      Volume: 23 Pages: 297-303

    • DOI

      10.1007/s10165-012-0658-1. Epub 2012 May 10.

    • Peer Reviewed
  • [Journal Article] Phospholipid scramblase 1 expression is enhanced in patients with antiphospholipid syndrome.2013

    • Author(s)
      Amengual O
    • Journal Title

      Mod Rheumatol

      Volume: 23 Pages: 81-88

    • DOI

      10.1007/s10165-012-0642-9. Epub 2012 Apr 24.

    • Peer Reviewed
  • [Journal Article] Overexpression of TNF-α-converting enzyme in fibroblasts augments dermal fibrosis after inflammation.2013

    • Author(s)
      Fukaya S
    • Journal Title

      Lab Invest

      Volume: 93 Pages: 72-80

    • DOI

      Epub 2012 Nov 12.

    • Peer Reviewed
  • [Journal Article] Positive synovial vascularity in patients with low disease activity indicates smouldering inflammation leading to joint damage in rheumatoid arthritis: time-integrated joint inflammation estimated by synovial vascularity in each finger joint.2013

    • Author(s)
      Fukae J
    • Journal Title

      Rheumatology

      Volume: 52 Pages: :523-528

    • DOI

      10.1093/rheumatology/kes310. Epub 2012 Nov 28.

    • Peer Reviewed
  • [Journal Article] Essential role of the p38 mitogen-activated protein kinase pathway in the tissue factor gene expression by the phosphatidylserine-dependent antiprothrombin antibody factor gene expression by the phosphatidylserine-dependent antiprothrombin antibody.2013

    • Author(s)
      Oku K
    • Journal Title

      Rheumatol

      Volume: in press Pages: in press

    • Peer Reviewed
  • [Journal Article] The involvement of CD36 in the monocyte activation by antiphospholipid antibodies.2013

    • Author(s)
      Kato M
    • Journal Title

      Lupus

      Volume: in press Pages: in press

    • Peer Reviewed
  • [Journal Article] Management of resolved hepatitis B in patients with low anti-hepatitis B surface titer who undergo aggressive immunosuppressive therapy: reply to the letter by Mori.2012

    • Author(s)
      Kato M, Atsumi T
    • Journal Title

      J Rheumatol

      Volume: 39 Pages: 1293-4

    • DOI

      DOI:10.3899/jrheum.120117

    • Peer Reviewed
  • [Journal Article] Severity-based treatment for Japanese patients with MPO-ANCA-associated vasculitis: the JMAAV study.2012

    • Author(s)
      Ozaki S
    • Journal Title

      Mod Rheumatol

      Volume: 22 Pages: 394-404

    • DOI

      10.1007/s10165-011-0525-5. Epub 2011 Sep 18.

    • Peer Reviewed
  • [Journal Article] Drug retention rates and relevant risk factors for drug discontinuation due to adverse events in rheumatoid arthritis patients receiving anti-cytokine therapy with different target molecules.2012

    • Author(s)
      Sakai R
    • Journal Title

      Ann Rheu Dis

      Volume: 71 Pages: 1820-1826

    • DOI

      10.1136/annrheumdis-2011-200838. Epub 2012 Apr 13.

    • Peer Reviewed
  • [Journal Article] A Genome-Wide Association Study Identified AFF1 as a Susceptibility Locus for Systemic Lupus Eyrthematosus in Japanese.2012

    • Author(s)
      Okada Y
    • Journal Title

      PLoS Genet

      Volume: 8 Pages: 1002455

    • DOI

      10.1371/journal.pgen.1002455. Epub 2012 Jan 26.

    • Peer Reviewed
  • [Journal Article] Factor XI is a substrate for oxidoreductases: Enhanced activation of reduced FXI and its role in antiphospholipid syndrome thrombosis.2012

    • Author(s)
      Giannakopoulos1 B
    • Journal Title

      J Autoimmunol

      Volume: 39 Pages: 121-129

    • DOI

      10.1016/j.jaut.2012.05.005. Epub 2012 Jun 13.

    • Peer Reviewed
  • [Journal Article] Cigarette Smoking, Alcohol Consumption, and Risk of Systemic Lupus Erythematosus: A Case-control Study in a Japanese Population.2012

    • Author(s)
      Kiyohara C
    • Journal Title

      J Rheumatol

      Volume: 39 Pages: 1363-1370

    • DOI

      10.3899/jrheum.111609. Epub 2012 May 15.

    • Peer Reviewed
  • [Journal Article] Pathophysiology of thrombosis and pregnancy morbidity in the antiphospholipid syndrome.2012

    • Author(s)
      Oku K
    • Journal Title

      Eur J Clin Invest

      Volume: 42 Pages: 1126-1135

    • DOI

      10.1111/j.1365-2362.2012.02697.x

    • Peer Reviewed
  • [Journal Article] Up-regulated expression of HLA-DRB5 transcripts and high frequency of the HLA-DRB5*01:05 allele in scleroderma patients with interstitial lung disease.2012

    • Author(s)
      Odani T
    • Journal Title

      Rheumatology

      Volume: 51 Pages: 1765-1774

    • DOI

      Epub 2012 Jun 20.

    • Peer Reviewed
  • [Journal Article] Time-dependent increased risk for serious infection from continuous use of tumor necrosis factor antagonists over three years in patients with rheumatoid arthritis.2012

    • Author(s)
      Sakai R
    • Journal Title

      Arthritis Care Res

      Volume: 64 Pages: 1125-1134

    • DOI

      10.1002/acr.21666.

    • Peer Reviewed
  • [Journal Article] Contrast-enhanced whole body joint MR Imaging in rheumatoid patients on tumour necrosis factor-alpha agents: a pilot study to evaluate novel scoring system for MR synovitis.2012

    • Author(s)
      Kamishima T
    • Journal Title

      Clin Exp Rheumatol

      Volume: 31 Pages: 154

    • DOI

      Epub 2012 Nov 22

    • Peer Reviewed
  • [Journal Article] The efficacy of Antiphospholipid Score for the diagnosis of antiphospholipid syndrome and its predictive value for thrombotic events.2012

    • Author(s)
      Otomo K
    • Journal Title

      Arthritis Rheum

      Volume: 64 Pages: 504-512

    • DOI

      10.1002/art.33340.

    • Peer Reviewed
  • [Journal Article] Risk modification by CYP1A1 and GSTM1 polymorphisms in the association of cigarette smoking and systemic lupus erythematosus in a Japanese population.2012

    • Author(s)
      Kiyohara C
    • Journal Title

      Scand J Rheumatol

      Volume: 41 Pages: 103-109

    • DOI

      10.3109/03009742.2011.608194. Epub 2012 Jan 4.

    • Peer Reviewed
  • [Journal Article] Thrombotic microangiopathy due to multiple autoantibodies related to antiphospholipid syndrome.2012

    • Author(s)
      Noda S
    • Journal Title

      Pediatr Nephro

      Volume: 4 Pages: 681-685

    • DOI

      10.1007/s00467-011-2085-5. Epub 2011 Dec 31.

    • Peer Reviewed
  • [Journal Article] A case of catastrophic antiphospholipid antibody syndrome complicated withsystemic lupus erythematosus, double positive for anti-cardiolipin/β(2) glycoprotein I and anti-phosphatidylserine/prothrombin autoantibodies.2012

    • Author(s)
      Hirakawa E
    • Journal Title

      Mod Rheumatol

      Volume: 22 Pages: 769-773

    • DOI

      10.1007/s10165-011-0563-z. Epub 2011 Nov 29.

    • Peer Reviewed
  • [Presentation] Phosphatidylserine dependent antiprothrombin antibodies significance and international standardization.2012

    • Author(s)
      Atsumi T.
    • Organizer
      58th Annual Scientific and Standardization Committee Meeting, International Society on Thrombosis and Haemostasis
    • Place of Presentation
      Liverpool Convention Center(UK)
    • Year and Date
      20120628-20120630
    • Invited
  • [Book] 今日の治療と看護 改訂第3版2013

    • Author(s)
      渥美達也
    • Total Pages
      1467
    • Publisher
      南江堂
  • [Book] 免疫・アレルギー疾患の分子標的と治療薬事典2013

    • Author(s)
      坊垣暁之
    • Total Pages
      375
    • Publisher
      羊土社
  • [Book] EBM血液疾患の治療2013-20142012

    • Author(s)
      藤枝雄一郎
    • Total Pages
      594
    • Publisher
      中外医学社

URL: 

Published: 2014-07-24  

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