与心房动相关的心脏通道 (SCN5A) 变异
Dawood Darbar1, Prince J Kannankeril, Brian S Donahue
1Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN, USA. dawood.darbar@vanderbilt.edu
Circulation
|April 2, 2008
概括
编码心脏通道的SCN5A基因的遗传变异与心房动 (AF) 有关. 这项研究确定了新的SCN5A变异,使个人易患AF,而不考虑潜在的心脏病.
科学领域:
- 心血管遗传学 心血管遗传学
- 分子心脏病学分子心脏病学
- 电子生理学 电子生理学
背景情况:
- 心房动 (AF) 是一种常见的心律失常.
- 遗传研究表明,离子通道基因变异有助于AF易感性.
- SCN5A基因编码心脏通道,是心脏电活动中的关键参与者.
研究的目的:
- 研究SCN5A基因变异与心房动 (AF) 之间的关联.
- 为了确定SCN5A中的突变或罕见变异是否会使个人易患心脏病或没有心脏病的AF.
主要方法:
- 在375名AF患者中重新测序了整个SCN5A编码区域 (孤独AF和心脏病AF).
- 360个对照对已识别的SCN5A变异进行基因定型.
- 在受影响的家庭中对变异分离的分析.
主要成果:
- 在10个试验组中发现了8种新的SCN5A变异 (2.7%),在对照组中不存在 (P=0.001).
- 这些新型变异影响高度保存的残留物,并与6个家族的AF共同分离.
- 在12名试验者 (3.2%) 中发现了11种罕见的误解变异,这些变异先前与其他心律失常综合征有关.
结论:
- 在患有或没有心脏病的患者中,SCN5A突变或罕见变异可能会增加对AF的敏感性.
- 这项研究扩大了SCN5A通道病变的临床谱,包括AF.
- 这些发现支持在AF患者中针对性治疗的分子表型.
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