1 Ocak 2017 Dergi makalesi Açık Erişim

Usluer, Sunay; Kayserili, Melek Asli; Eken, Asli Gundogdu; Yis, Uluc; Leu, Costin; Altmueller, Janine; Thiele, Holger; Nuernberg, Peter; Sander, Thomas; Caglayan, S. Hande

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    <subfield code="a">Benign Familial Infantile Epilepsy (BFIE) is clinically characterized by clusters of brief partial seizures progressing to secondarily generalized seizures with onset at the age of 3-7 months and with favorable outcome. PRRT2 mutations are the most common cause of BFIE, and found in about 80% of BFIE families. In this study, we analyzed a large multiplex BFIE family by linkage and whole exome sequencing (WES) analyses. Genome-wide linkage analysis revealed significant evidence for linkage in the chromosomal region 19p12-q13 (LOD score 3.48). Mutation screening of positional candidate genes identified a synonymous SCN1B variant (c.492T&amp;gt;C, p.Tyr164Tyr) affecting splicing by the removal of a splicing silencer sequence, shown by in silico analysis, as the most likely causative mutation. In addition, the PRRT2 frameshift mutation (c.649dupC/p.Arg217Profs*8) was observed, showing incomplete, but high segregation with the phenotype. In vitro splicing assay of SCN1B expression confirmed the in silico findings showing a splicing imbalance between wild type and mutant exons. Herein, the involvement of the SCN1B gene in the etiology of BFIE, contributing to the disease phenotype as a modifier or part of an oligogenic predisposition, is shown for the first time. (C) 2017 European Paediatric Neurology Society. Published by Elsevier Ltd. All rights reserved.</subfield>
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    <subfield code="a">Usluer, Sunay</subfield>
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    <subfield code="a">Association of a synonymous SCN1B variant affecting splicing efficiency with Benign Familial Infantile Epilepsy (BFIE)</subfield>
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