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潜在性突然死症候群の顕在化に関与する遺伝的背景と分子病態の解明

Research Project

Project/Area Number 21790718
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field Circulatory organs internal medicine
Research InstitutionShiga University of Medical Science

Principal Investigator

伊藤 英樹  Shiga University of Medical Science, 医学部, 助教 (30402738)

Project Period (FY) 2009 – 2011
Project Status Completed (Fiscal Year 2011)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2011: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2010: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2009: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
KeywordsQT延長症候群 / 後天性 / 薬剤 / 遺伝子 / チャネル / 突然死 / 変異 / 先天性
Research Abstract

全国4施設で遺伝子変異の同定された603症例の先天性QT延長症候群(発端者310症例、家族293症例)を単変異568例と複数変異35例に分類し、臨床像を比較検討した。310症例の遺伝子診断された発端者のうち、26例(8.4%)が複数変異例であった。全603例の解析において、QTc間隔は複数変異症例で有意に延長しており(複数変異例vs.単変異例;510±56 vs.478±53ms, P=0.001)、シュワルツスコアも高値であった(複数変異例vs.単変異例;4.2±2.1 vs 3.4±1.9, P=0.017)。またKaplan-Meier法による心イベントの発生率も複数変異例で有意に高率であった(log-rank test, P=0.004)。特にLQT1, LQT2の遺伝型に関係した複数変異例は、それぞれの単変異例より心イベントの発生率が高率であった(log-rank test, P=0.001 and P=0.035)。複数変異例の家系内に存在する単変異症例のうち、有症状者は6%のみであり、QTc間隔も442ms±30msと軽度の延長を認めるのみで複数変異例より軽微な延長であった(P<0.001)。先天性QT延長症候群における複数変異例の臨床病態は単変異症例と比較して重篤である一方で、家系内の単変異例は心電図所見を含む臨床像が軽微であり、潜在性QT延長症候群の1群と考えられた。以上のことから、複数変異を同定した家族においては、臨床情報だけでは変異症例を見落とす可能性があり、積極的に遺伝子スクリーニングを行い不整脈予防に努めることが重要であると考えられた。本研究結果は米国不整脈学会誌Heart Rhythm誌に報告した。また昨年の実績報告書に記載した薬剤性QT延長症候群の報告が日本心電図学会最優秀賞に選ばれた。

Report

(2 results)
  • 2010 Annual Research Report
  • 2009 Annual Research Report
  • Research Products

    (56 results)

All 2011 2010 2009 Other

All Journal Article (16 results) (of which Peer Reviewed: 11 results) Presentation (37 results) Book (1 results) Remarks (2 results)

  • [Journal Article] Long QT Syndrome with Compound Mutations is Associated with a More Severe Phenotype : a Japanese Multicenter Study2010

    • Author(s)
      Itoh H
    • Journal Title

      Heart Rhythm

      Volume: 7 Pages: 1411-1418

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Heart rate-dependent variability of cardiac events in type 2 congenital long-QT syndrome2010

    • Author(s)
      Nagaoka I
    • Journal Title

      Europace

      Volume: 12 Pages: 1623-1629

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Atrioventricular Block-Induced Torsades de Pointes with Clinical and Molecular Backgrounds Similar to Congenital Long QT Syndrome2010

    • Author(s)
      Oka Y
    • Journal Title

      Circ J

      Volume: 74 Pages: 2562-2571

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] High prevalence of early repolarization in Short QT syndrome2010

    • Author(s)
      Watanabe H
    • Journal Title

      Heart Rhythm

      Volume: 7 Pages: 647-52

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] KCNE2 Modulation of KV4.3 current and its potential role in fatal rhythm disorders2010

    • Author(s)
      Wu J
    • Journal Title

      Heart Rhythm

      Volume: 7 Pages: 199-205

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Novel KCNE5 variants are associated with Brugada syndrome and idiopathic ventricular fibrillation2010

    • Author(s)
      Ohno S
    • Journal Title

      Circulaton : Arrhythm Electrophysiol

      Volume: (in press)

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 先天性QT延長症候群の遺伝子診断-複数変異例の検討-2010

    • Author(s)
      伊藤英樹
    • Journal Title

      心電図

      Volume: 7 Pages: 195-199

    • Related Report
      2010 Annual Research Report
  • [Journal Article] QTが長ければQT延長症候群か?2010

    • Author(s)
      伊藤英樹
    • Journal Title

      Medicina

      Volume: 47(1) Pages: 66-68

    • Related Report
      2010 Annual Research Report
  • [Journal Article] 遺伝子異常と不整脈2010

    • Author(s)
      伊藤英樹
    • Journal Title

      臨床と研究

      Volume: 87(1) Pages: 98-101

    • Related Report
      2010 Annual Research Report
  • [Journal Article] KCNE2 Modulation of KV4.3 current and its potential role in fatal rhythm disorders2010

    • Author(s)
      Jie Wu
    • Journal Title

      Heart Rhythm 54

      Pages: 199-205

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] QTが長ければQT延長症候群か?2010

    • Author(s)
      伊藤英樹
    • Journal Title

      Medicina 47

      Pages: 66-68

    • Related Report
      2009 Annual Research Report
  • [Journal Article] 遺伝子異常と不整脈2010

    • Author(s)
      伊藤英樹
    • Journal Title

      臨床と研究 84

      Pages: 98-101

    • Related Report
      2009 Annual Research Report
  • [Journal Article] Aortopulmonary artery dissection2009

    • Author(s)
      Hideki Itoh
    • Journal Title

      J Am Coll Cardiol 54

      Pages: 1990-1990

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Latent Genetic Background and Molecular Pathogenesis of Drug-Induced Long QT Syndrome2009

    • Author(s)
      Hideki Itoh
    • Journal Title

      Circulation : Arrhythm Electrophysiol 2

      Pages: 511-523

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A Novel KCNH2 Mutation as a Modifier for Short QT Interval2009

    • Author(s)
      Hideki Itoh
    • Journal Title

      Int J Cardiol 137

      Pages: 83-85

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] D85N, a KCNE1 polymorphism, is a disease-causing gene variant in long QT syndrome2009

    • Author(s)
      Nishio Y
    • Journal Title

      J Am Coll Cardiol 54

      Pages: 812-819

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Presentation] 特発性心室細動(VF)発症前の12誘導心電図にて著明なJ点の上昇を認めた3例2011

    • Author(s)
      宮武秀光
    • Organizer
      第25回滋賀医科大学呼吸循環器内科定期総会
    • Place of Presentation
      滋賀
    • Year and Date
      2011-02-05
    • Related Report
      2010 Annual Research Report
  • [Presentation] カテーテルアブレーション術が困難であった不整脈源性右室心筋症の1例2010

    • Author(s)
      大野将司
    • Organizer
      第69回滋賀県循環器疾患研究会
    • Place of Presentation
      滋賀
    • Year and Date
      2010-12-04
    • Related Report
      2010 Annual Research Report
  • [Presentation] PSVT中の心室ペーシングおよびpara-Hisian pacingにて奇異な現象を認めたAVRTの一例2010

    • Author(s)
      藤居祐介
    • Organizer
      第21回京滋奈良ハートリズム研究会
    • Place of Presentation
      京都
    • Year and Date
      2010-07-31
    • Related Report
      2010 Annual Research Report
  • [Presentation] RYR2変異が同定され、フレカイニドが著効したカテコラミン誘発性多形性心室頻拍(CPVT)の一成人例2010

    • Author(s)
      川村美朋子
    • Organizer
      第30回日本ホルター・ノンインベイシブ心電学研究会
    • Place of Presentation
      大阪
    • Year and Date
      2010-07-10
    • Related Report
      2010 Annual Research Report
  • [Presentation] 心不全患者に対する両室再同期療法の適応にあたりresponder抽出のための当院での試み~2D speckled tracking echoでのdyssyncronyの評価の有用性~2010

    • Author(s)
      小澤友哉
    • Organizer
      第8回滋賀呼吸循環器フォーラム
    • Place of Presentation
      滋賀
    • Year and Date
      2010-07-10
    • Related Report
      2010 Annual Research Report
  • [Presentation] 多彩な不整脈からうっ血性心不全を発症した肢体型筋ジストロフィの一例2010

    • Author(s)
      清水碧
    • Organizer
      第109回日本循環器学会近畿地方会
    • Place of Presentation
      大阪
    • Year and Date
      2010-06-05
    • Related Report
      2010 Annual Research Report
  • [Presentation] Latent genetic backgrounds and molecular pathogenesis in acquired long QT syndrome with distinct triggers2010

    • Author(s)
      Itoh H
    • Organizer
      American Heart Association (AHA)
    • Place of Presentation
      Chicago, U.S.A.
    • Related Report
      2010 Annual Research Report
  • [Presentation] Non-selective β-adrenoceptor Blocker, for Prevention of Cardiac Events in Patients with Type 2 Long QT Syndrome2010

    • Author(s)
      Kimura H
    • Organizer
      American Heart Association (AHA)
    • Place of Presentation
      Chicago, U.S.A.
    • Related Report
      2010 Annual Research Report
  • [Presentation] Long QT syndrome with compound mutations is associated with a severer phenotype : a Japanese multicenter study2010

    • Author(s)
      Itoh H
    • Organizer
      European Heart Association (ESC)
    • Place of Presentation
      Stockholm, Sweden
    • Related Report
      2010 Annual Research Report
  • [Presentation] Roles of fibroblasts in the mechanism of complex fractionated atrial electrograms during chronic atrial fibrillation2010

    • Author(s)
      Ashihara T
    • Organizer
      Heart Rhythm
    • Place of Presentation
      Denver, U.S.A.
    • Related Report
      2010 Annual Research Report
  • [Presentation] Influence of pulmonary vein isolation on heart rate : A clinical study using event-ECG monitors2010

    • Author(s)
      Nakazawa Y
    • Organizer
      APHRS2010/APAFS2010
    • Place of Presentation
      Jeju Island, Korea
    • Related Report
      2010 Annual Research Report
  • [Presentation] Roles of fibroblasts in the mechanisms of complex fractionated atrial electrograms and catheter ablation during chronic atrial fibrillation2010

    • Author(s)
      Ashihara T
    • Organizer
      APHRS2010/APAFS2010
    • Place of Presentation
      Jeju Island, Korea
    • Related Report
      2010 Annual Research Report
  • [Presentation] ここまで進んだ不整脈の遺伝子診断家族性ペースメーカー植え込み症例の遺伝的背景-心臓Naチャネル病、ラミンA/C関連心筋症-2010

    • Author(s)
      牧山武
    • Organizer
      第25回日本不整脈学会学術大会シンポジウム
    • Place of Presentation
      名古屋(招待講演)
    • Related Report
      2010 Annual Research Report
  • [Presentation] 心房細動の機序とそれに基づく治療戦略Complex Fractionated Atrial Electrogramsのメカニズムにおける繊維芽細胞の役割とカテーテルアブレーションに関する理論的研究2010

    • Author(s)
      芦原貴司
    • Organizer
      第25回日本不整脈学会学術大会シンポジウム
    • Place of Presentation
      名古屋(招待講演)
    • Related Report
      2010 Annual Research Report
  • [Presentation] KCNE5遺伝子変異からBrugada症候群の精査を考える2010

    • Author(s)
      大野聖子
    • Organizer
      第27回日本心電図学会学術集会ラウンドテーブルディスカッション
    • Place of Presentation
      大分(招待講演)
    • Related Report
      2010 Annual Research Report
  • [Presentation] Complex Fractionated Atrial Electrogramsのメカニズムにおける線維芽細胞の役割とカテーテルアブレーションに関する理論的研究2010

    • Author(s)
      芦原貴司
    • Organizer
      第25回日本不整脈学会学術大会(JHRS)
    • Place of Presentation
      名古屋
    • Related Report
      2010 Annual Research Report
  • [Presentation] Irrigated ablation systemによる左房後壁の電位波高低下は安全な焼灼の指標となるか?2010

    • Author(s)
      伊藤誠
    • Organizer
      第27回日本心電学会学術集会
    • Place of Presentation
      大分
    • Related Report
      2010 Annual Research Report
  • [Presentation] 非選択性α1-βアドレナリン受容体遮断薬(カルベジロール)は2型QT延長症候群の心イベントを抑制する2010

    • Author(s)
      木村紘美
    • Organizer
      第27回日本心電学会学術集会
    • Place of Presentation
      大分
    • Related Report
      2010 Annual Research Report
  • [Presentation] シンポジウムLatent Genetic Backgrounds of Acquired Long QT Syndrome2010

    • Author(s)
      Hideki Itoh
    • Organizer
      第74回日本循環器学会総会学術集会
    • Place of Presentation
      京都
    • Related Report
      2009 Annual Research Report
  • [Presentation] Irrigation catheterを用いた肺静脈隔離術における食道温測定の意義2010

    • Author(s)
      伊藤誠
    • Organizer
      第20回京滋奈良ハートリズム研究会
    • Place of Presentation
      京都
    • Related Report
      2009 Annual Research Report
  • [Presentation] J波を伴う突発性心室細動におけるデバイス治療の工夫と有効性2010

    • Author(s)
      八尾武憲
    • Organizer
      日本不整脈学会 第2回植え込みデバイス関連冬季大会
    • Place of Presentation
      東京
    • Related Report
      2009 Annual Research Report
  • [Presentation] Both Gain-and Loss-of-Function Mutations in the Cardiac Na Channel Gene, SCN5A, are Associated with Sudden Infant Death Syndrome(SIDS).2010

    • Author(s)
      Makiyama T
    • Organizer
      第74回日本循環器学会総会・学術集会
    • Place of Presentation
      京都
    • Related Report
      2009 Annual Research Report
  • [Presentation] A Novel Gain-of-Function KCNJ2 Mutation Associated with Short QT Syndrome Impairs Inward Rectification of Kir2.1 Currents2010

    • Author(s)
      Hattori T
    • Organizer
      第74回日本循環器学会総会・学術集会
    • Place of Presentation
      京都
    • Related Report
      2009 Annual Research Report
  • [Presentation] Atrioventricular Block-Induced Torsades de Pointes had Clinical and Molecular Backgrounds of not Acquired but Congenital Long QT Syndrome2010

    • Author(s)
      Jito Y
    • Organizer
      第74回日本循環器学会総会・学術集会
    • Place of Presentation
      京都
    • Related Report
      2009 Annual Research Report
  • [Presentation] What is the Best Index of Successful Ablation in Each Radiofrequency Point Using Irrigation Catheter for Pulmonary Vein Isolation?2010

    • Author(s)
      Ito M
    • Organizer
      第74回日本循環器学会総会・学術集会
    • Place of Presentation
      京都
    • Related Report
      2009 Annual Research Report
  • [Presentation] Genetic Variants of KCNQ1 and KCNE2 in Patients with Brugada Syndrome and Idiopathic Ventricular Fibrillation2010

    • Author(s)
      Ueyama T
    • Organizer
      第74回日本循環器学会総会・学術集会
    • Place of Presentation
      京都
    • Related Report
      2009 Annual Research Report
  • [Presentation] Theoretical Study on the Mechanisms of Complex Fractionated Atrial Electrogram-Targeted Atrial Fibrillation Ablation2010

    • Author(s)
      Ashihara T
    • Organizer
      第74回日本循環器学会総会・学術集会
    • Place of Presentation
      京都
    • Related Report
      2009 Annual Research Report
  • [Presentation] 学術諮問委員会指定トピックス先天性QT延長症候群における遺伝子診断-複数変異例の検討-2009

    • Author(s)
      伊藤英樹
    • Organizer
      第24回日本不整脈学会・第26回日本心電図学会合同学術集会
    • Place of Presentation
      京都
    • Related Report
      2009 Annual Research Report
  • [Presentation] 学術諮問委員会指定トピックス家族性ペースメーカー植込み症例における遺伝的背景の検討-心臓Na+チャネル病,Iamin A/C関連心筋症-2009

    • Author(s)
      牧山武
    • Organizer
      第24回日本不整脈学会・第26回日本心電図学会合同学術集会
    • Place of Presentation
      京都
    • Related Report
      2009 Annual Research Report
  • [Presentation] HRS-JHRS joint Symposium Overlap between LQT3 and Brugada syndrome : clinical features in a common mutation and underlying biophysical mechanisms.2009

    • Author(s)
      Makita N
    • Organizer
      第24回日本不整脈学会・第26回日本心電図学会合同学術集会
    • Place of Presentation
      京都
    • Related Report
      2009 Annual Research Report
  • [Presentation] ICD植え込み後にVF onsetが明らかとなった心肺蘇生後の一例2009

    • Author(s)
      八尾武憲
    • Organizer
      ICD公開研究会学術集会
    • Place of Presentation
      大阪
    • Related Report
      2009 Annual Research Report
  • [Presentation] Association of Early Repolarization With Arrhythmic Events in Short QT Syndrome2009

    • Author(s)
      Watanabe H
    • Organizer
      AHA Scientific Sessions 2009
    • Place of Presentation
      Orlando, U.S.A
    • Related Report
      2009 Annual Research Report
  • [Presentation] A Novel Gain-of-function KCNJ2 Mutation Associated With Short QT Syndrome Impairs Inward Rectification of Kir 2.1 Currents2009

    • Author(s)
      Hattori T
    • Organizer
      AHA Scientific Sessions 2009
    • Place of Presentation
      Orlando, U.S.A
    • Related Report
      2009 Annual Research Report
  • [Presentation] 冠動脈洞開口異常を合併した房室回帰性頻拍にカテーテル・アブレーションを施行し根治しえた1例2009

    • Author(s)
      伊藤英樹
    • Organizer
      第189回日本内科学会近畿地方会
    • Place of Presentation
      大阪
    • Related Report
      2009 Annual Research Report
  • [Presentation] 多量の心嚢水を認めた好酸球性心筋炎の1例2009

    • Author(s)
      吉井理一郎
    • Organizer
      第189回日本内科学会近畿地方会
    • Place of Presentation
      大阪
    • Related Report
      2009 Annual Research Report
  • [Presentation] 多種類の上室頻拍を合併した心臓手術後の一例2009

    • Author(s)
      城日加里
    • Organizer
      第24回日本不整脈学会学術大会 第26回日本心電学会学術集会合同学術集会
    • Place of Presentation
      京都
    • Related Report
      2009 Annual Research Report
  • [Presentation] At-Home AED : ICD植込みが困難な患者に対する代替法としてのAED利用について2009

    • Author(s)
      八尾武憲
    • Organizer
      第24回日本不整脈学会学術大会 第26回日本心電学会学術集会合同学術集会
    • Place of Presentation
      京都
    • Related Report
      2009 Annual Research Report
  • [Book] 今さら聞けない心電図2010

    • Author(s)
      池田隆徳、伊藤英樹, 他
    • Total Pages
      294
    • Publisher
      MEDICAL VIEW
    • Related Report
      2010 Annual Research Report
  • [Remarks]

    • URL

      http://www.shiga-med.ac.jp/~hqmed1/shiga_image/kenkyu/gyoseki.html

    • Related Report
      2010 Annual Research Report
  • [Remarks]

    • URL

      http://www.shiga-med.ac.jp/~hqmed1/shiga_image/kenkyu/gyoseki.html

    • Related Report
      2009 Annual Research Report

URL: 

Published: 2009-04-01   Modified: 2016-04-21  

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