台湾学者发现Brugada综合征病人可能缺失NALCN基因

2012-04-20 蒋鸿鑫(编译) 医学论坛网

  2012年世界心脏病学大会(4月18-21日)报道  我国台湾大学医学院及其附设医院的研究人员在无SCN5A突变的Brugada综合征 (BrS)病人中新发现了NALCN 基因的缺失。   Brugada综合征 (BrS)是一种遗传性疾病,其特征是心电图异常,心源性猝死危险增加,尤其是在亚洲青年男性中。研究显示SCN5A基因突变与BrS

  2012年世界心脏病学大会(4月18-21日)报道  我国台湾大学医学院及其附设医院的研究人员在无SCN5A突变的Brugada综合征 (BrS)病人中新发现了NALCN 基因的缺失。

  Brugada综合征 (BrS)是一种遗传性疾病,其特征是心电图异常,心源性猝死危险增加,尤其是在亚洲青年男性中。研究显示SCN5A基因突变与BrS有关。但全世界只有20%–25%的 BrS病人有此突变。拷贝数变异(CNV)可能是其中一个原因。为此,研究人员在没有SCN5A突变的BrS病人中开展了一项全基因组关联研究。他们在16例无SCN5A突变的BrS病人和16名健康对照者中进行了CNV分析。

  结果,BrS病人和健康对照者均为男性(两组平均年龄分别为35和69岁)。在至少25%的受试者(4/16)中共检测到438个显示CNV的基因,BrS病人的13号染色体的NALCN(Na渗漏通道)拷贝数显著低于对照者(Kruskal-wallis检验:CN=0.77, P=0.0018)。Na+, K+和Ca2+可渗透的NALCN导致了钠渗漏电导。与对照组相比,聚合酶链反应(PCR)检测显示BrS病人显著缺失NALCN基因。此基因的缺失可妨碍静息膜动作电位的稳定性或钠通道的激活(可导致致命性心律不齐)。

  会议报道链接:

  心电图:携带KCNJ5基因突变的13型LQTS的表型

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    2012-04-22 般若傻瓜
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    2012-04-22 nymo

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