在鹿特丹研究中,常见的NOS1AP变异与延长的QTc间隔有关
Albert-Jan L H J Aarnoudse1, Christopher Newton-Cheh, Paul I W de Bakker
1Department of Epidemiology and Biostatistics, Erasmus Medical Center, PO Box 2040, 3000 CA, Rotterdam, The Netherlands.
Circulation
|June 20, 2007
概括
在老年人中,NOS1AP基因的常见变异显著影响QT间隔的持续时间. 然而,这项研究发现,这些遗传变异与心脏突然死亡风险之间没有明确的联系.
科学领域:
- 心血管遗传学 心血管遗传学
- 人类遗传学 人类遗传学
- 分子心脏病学分子心脏病学
背景情况:
- QT延长是心脏突然死亡的关键风险因素,遗传性约占其变化的35%.
- 一项全基因组关联研究在氧化物合成酶1适应蛋白 (NOS1AP) 基因中发现了一种常见的变异 (rs10494366),与QT间隔变异相关.
研究的目的:
- 为了研究两个NOS1AP基因变异 (rs10494366和rs10918594) 与QT间隔持续时间的关联.
- 评估这些NOS1AP变体与心脏突然死亡风险之间的关系.
主要方法:
- 这项研究涉及对6571名55岁及以上的人进行基因定型,这些人来自基于人口的鹿特丹研究.
- 使用心电图 (ECG) 分析测量了QT间隔的持续时间,并使用统计模型分析了QT持续时间和突然心脏死亡的关联.
主要成果:
- rs10494366 G等位基因与每个等位基因拷贝的QTc间隔持续时间增加3.8毫秒有关.
- rs10918594 G等位基因表现出类似的关联,每个等位基因拷贝增加QTc间隔持续时间3.6毫秒.
- 尽管随访时间中位数为11.9年,有233例突发心脏病死亡,但研究的NOS1AP变体与突发心脏病死亡风险之间没有显著的关联.
结论:
- 在老年人群中,NOS1AP基因中的常见变异与QT间隔持续时间有着强烈的关联.
- 需要更大的样本大小来最终确认或驳斥这些变体对突然心脏死亡风险的潜在影响.
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