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- W1567192836 abstract "Congenital long QT syndrome (LQTS) is a genetically heterogeneous disease in which six ion-channel genes have been identified. The phenotype-genotype relationships of the HERG (human ether-a-go-go-related gene) mutations are not fully understood. The objective of this study is to identify the underlying genetic basis of a Chinese family with LQTS and to characterize the clinical manifestations properties of the mutation. Single strand conformation polymorphism (SSCP) analyses were conducted on DNA fragments amplified by polymerase chain reaction from five LQT-related genes. Aberrant conformers were analyzed by DNA sequencing. A novel splice mutation in C-terminus of HERG was identified in this Chinese LQTS family,leading to the deletion of 11-bp at the acceptor splice site of Exon9 [Exon9 IVS del (-12→-2)]. The mutation might affect,through deficient splicing, the putative cyclic nucleotide binding domain (CNBD) of the HERG K+ channel. This mutation resulted in a mildly affected phenotype. Only the proband had a history of syncopes, while the other three individuals with long QT interval had no symptoms. Two other mutation carriers displayed normal phenotype. No sudden death occurred in the family. The 4 affected individuals and the two silent mutation carriers were all heterozygous for the mutation. It is the first splice mutation of HERG reported in Chinese LQTS families. Clinical data suggest that the CNBD mutation may be less malignant than mutations occurring in the pore region and be partially dominant over wild-type function." @default.
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- W1567192836 date "2005-01-01" @default.
- W1567192836 modified "2023-09-23" @default.
- W1567192836 title "A novel splice mutation of HERG in a Chinese family with long QT syndrome" @default.
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