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出 处:《心血管病学进展》2014年第6期625-629,共5页Advances in Cardiovascular Diseases
摘 要:长QT综合征(LQTS)是一种常于青少年发病的遗传性心律失常,迄今为止已发现20个致病基因.其中LQT1 ~3占约80%,致病基因分别为KCNQ1(IKs)、KCNH2(IKr)、SCN5A (Na),故关于基因筛查专家共识建议只筛查LQT1~3.在3个主要亚型中,目前研究最多的是LQT2.主要涉及的机制有突变导致蛋白转运障碍、无义介导的mRNA衰减、翻译重启造成N端截短蛋白、影响PAS域蛋白折叠及与其他部分的相互关系、全长Kv11.1a异构体转换为C端截短的Kv1 1.1 a-USO等.也探讨了对应这些机制的基因特异性治疗策略.Long QT syndrome(LQT) is an inherited arrhythmia that is often seen in children. There are 20 disease-causing genes that have been found, among them LQT1 -3 account tbr 80% , named KCNQ1 (I_ks) , KCNH2 (I_ks) and SCN5A (Na) ,respectively. Expert consensus recommendations for LQTS genetic testing are to screen these 3 genes. The most advanced progress comes from research on LQT2. The major mechanisms include traffic defective, nonsense-mediated mRNA decay, trafficking defective NH2-terminally truncated channel by reinitiation of translation, reduced PAS domain stability, isoform switch, et al. Gene-speeific interventions based on these mechanisms are also discussed in this article.
关 键 词:长QT综合征 基因筛查 KCNQ1 KCNH2 基因特异治疗
分 类 号:R541.7[医药卫生—心血管疾病]
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