Novel rare variants in congenital cardiac arrhythmia genes are frequent in drug-induced torsades de pointes.

Novel rare variants in congenital cardiac arrhythmia genes are frequent in drug-induced torsades de pointes.
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DOI:
10.1038/tpj.2012.14
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发表时间:
2013-08
期刊:
The pharmacogenomics journal
影响因子:
--
通讯作者:
Roden DM
Roden DM
中科院分区:
其他
文献类型:
--
作者:
Ramirez AH;Shaffer CM;Delaney JT;Sexton DP;Levy SE;Rieder MJ;Nickerson DA;George AL Jr;Roden DM

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Marked prolongation of the QT interval and polymorphic ventricular tachycardia following medication (drug-induced long QT syndrome, diLQTS) is a severe adverse drug reaction (ADR) that phenocopies congenital long QT syndrome (cLQTS) and one of the leading causes for drug withdrawal and relabeling. We evaluated the frequency of rare non-synonymous variants in genes contributing to the maintenance of heart rhythm in cases of diLQTS using targeted capture coupled to next generation sequencing. Eleven of 31 diLQTS subjects (36%) carried a novel missense mutation in genes with known congenital arrhythmia associations or a known cLQTS mutation. In the 26 Caucasian subjects, 23% carried a highly conserved rare variant predicted to be deleterious to protein function in these genes compared with only 2-4% in public databases (p < 0.003). We conclude that rare variation in genes responsible for congenital arrhythmia syndromes is frequent in diLQTS. Our findings demonstrate that diLQTS is a pharmacogenomic syndrome predisposed by rare genetic variants.
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