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Title: Reduced Penetrance and Variable Expression of SCN5A Mutations and the Importance of Co-inherited Genetic Variants: Case Report and Review of the Literature
Authors: Robyns, Tomas ×
Nuyens, Dieter
Van Casteren, Lieve
Corveleyn, Anniek
de Ravel de l'Argentière, Thomy
Heidbuchel, Hein
Willems, Rik #
Issue Date: May-2014
Publisher: Indian Pacing and Electrophysiology Group
Series Title: Indian Pacing and Electrophysiology Journal vol:14 issue:3 pages:133-149
Abstract: Mutations in the SCN5A gene are responsible for multiple phenotypical presentations including Brugada syndrome, long QT syndrome, progressive familial heart block, sick sinus syndrome, dilated cardiomyopathy, lone atrial fibrillation and multiple overlap syndromes. These different phenotypic expressions of a mutation in a single gene can be explained by variable expression and reduced penetrance. One of the possible explanations of these phenomena is the co-inheritance of genetic variants. We describe a family where the individuals exhibit a compound heterozygosity in the SCN5A gene including a mutation (R1632H) and a new variant (M858L). Individuals with both the mutation and new variant present with a more severe phenotype including spontaneous atrial tachyarrhythmia at young age. We give an overview of the different phenotypes of “SCN5A disease” and discuss the importance of co-inherited genetic variants in the expression of SCN5A disease.
ISSN: 0972-6292
Publication status: published
KU Leuven publication type: DI
Appears in Collections:Cardiology
Laboratory for Molecular Diagnosis
Department of Human Genetics - miscellaneous
× corresponding author
# (joint) last author

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