人类RYR2相关疾病的扩大范围:新的心电图,结构和遗传特征
Zahurul A Bhuiyan1, Maarten P van den Berg, J Peter van Tintelen
1Department of Clinical Genetics, Academic Medical Centre, University of Amsterdam, The Netherlands. z.a.bhuiyan@amc.uva.nl
Circulation
|September 19, 2007
概括
瑞亚诺丁受体2 (RYR2) 基因的大量删除会导致catecholaminergic多态心室性心动减速和其他心律问题. 这一遗传发现扩大了RYR2相关心脏病的已知临床谱.
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
- 节律失常学 节律失常学
背景情况:
- catecholaminergic多形心室性心力衰竭 (CPVT) 是一种遗传性疾病,在压力期间会导致危险的心律.
- CPVT患者经常表现出胸肌梗塞,有时是右心室脂肪透.
- 这项研究调查了两个家庭的扩大临床表现的CPVT.
研究的目的:
- 在两个具有异常临床特征的家族中确定CPVT的遗传原因.
- 扩大对RYR2基因在心律失常中的作用的理解.
- 描述与RYR2突变相关的全临床谱.
主要方法:
- 16名家庭成员的临床评估和15年的随访.
- 链接分析将疾病位置映射到染色体1q42-q43.
- 使用PCR,MLPA和远程PCR进行基因查,以确定RYR2和ACTN2.2中的突变.
主要成果:
- 受影响的个体呈现了运动诱导的心室节律失常,心房和心房节点功能障碍,心房动和心房静止.
- 在几个患者中观察到左心室功能障碍和扩张.
- 在所有受影响的个体中,在RYR2基因的第3个外显子中发现了大量的基因组删除,这是由Alu重复介导的聚合酶滑动引起的.
结论:
- 这是RYR2中导致CPVT的大型基因组删除的第一份报告.
- 确定的RYR2缺失与扩展的表型有关,包括心房和节点功能障碍和扩展性心肌病.
- 这些发现扩大了与RYR2基因缺陷相关的已知临床谱.
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