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2014 ; 4
(ä): 5616
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Whole-exome sequencing identifies Y1495X of SCN5A to be associated with familial
conduction disease and sudden death
#MMPMID25010007
Tan ZP
; Xie L
; Deng Y
; Chen JL
; Zhang WZ
; Wang J
; Yang JF
; Yang YF
Sci Rep
2014[Jul]; 4
(ä): 5616
PMID25010007
show ga
SCN5A mutations have been reported to underlie a variety of inherited
arrhythmias, while the complex overlapping phenotype, especially with congenital
heart disease (CHD), is rarely reported. The 48-year-old proband underwent a
recent syncope during rest. A CHD (tetralogy of Fallot) and conduction disease
was revealed by echocardiogram and ultrasonic cardiogram examination. We combined
whole-exome sequencing (WES) and bioinformatics strategies to identify the
pathogenic gene for this autosomal-dominant cardiac conduction disease (CCD) in a
multi-generation pedigree. We examined four members of this family, including
three affected and one unaffected. A novel nonsense mutation (Y1495X) in SCN5A
was identified in the affected family members. This mutation is predicted to
generate a truncated SCN5A protein, which could result in the loss of sodium
current, a defined mechanism of SCN5A related arrhythmias. Our study provides
evidence that WES is a highly effective approach for genetic analyses of rare
clinical phenotypes. Our study also offers accurate genetic testing information
for those yet clinically negative relatives.
|Adolescent
[MESH]
|Adult
[MESH]
|Aged
[MESH]
|Arrhythmias, Cardiac/*etiology/*genetics
[MESH]
|Brugada Syndrome
[MESH]
|Cardiac Conduction System Disease
[MESH]
|Child
[MESH]
|Child, Preschool
[MESH]
|Codon, Nonsense/genetics
[MESH]
|Death, Sudden/*etiology
[MESH]
|Exome/*genetics
[MESH]
|Female
[MESH]
|Genetic Predisposition to Disease/*genetics
[MESH]