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- Title
Mutations in GRIN2A cause idiopathic focal epilepsy with rolandic spikes.
- Authors
Lemke, Johannes R; Lal, Dennis; Reinthaler, Eva M; Steiner, Isabelle; Nothnagel, Michael; Alber, Michael; Geider, Kirsten; Laube, Bodo; Schwake, Michael; Finsterwalder, Katrin; Franke, Andre; Schilhabel, Markus; Jähn, Johanna A; Muhle, Hiltrud; Boor, Rainer; Van Paesschen, Wim; Caraballo, Roberto; Fejerman, Natalio; Weckhuysen, Sarah; De Jonghe, Peter
- Abstract
Idiopathic focal epilepsy (IFE) with rolandic spikes is the most common childhood epilepsy, comprising a phenotypic spectrum from rolandic epilepsy (also benign epilepsy with centrotemporal spikes, BECTS) to atypical benign partial epilepsy (ABPE), Landau-Kleffner syndrome (LKS) and epileptic encephalopathy with continuous spike and waves during slow-wave sleep (CSWS). The genetic basis is largely unknown. We detected new heterozygous mutations in GRIN2A in 27 of 359 affected individuals from 2 independent cohorts with IFE (7.5%; P = 4.83 × 10−18, Fisher's exact test). Mutations occurred significantly more frequently in the more severe phenotypes, with mutation detection rates ranging from 12/245 (4.9%) in individuals with BECTS to 9/51 (17.6%) in individuals with CSWS (P = 0.009, Cochran-Armitage test for trend). In addition, exon-disrupting microdeletions were found in 3 of 286 individuals (1.0%; P = 0.004, Fisher's exact test). These results establish alterations of the gene encoding the NMDA receptor NR2A subunit as a major genetic risk factor for IFE.
- Subjects
GENETICS of epilepsy; CHILDHOOD epilepsy; GENETIC mutation; DELETION mutation; MEDICAL statistics; GENETIC code; METHYL aspartate receptors
- Publication
Nature Genetics, 2013, Vol 45, Issue 9, p1067
- ISSN
1061-4036
- Publication type
Article
- DOI
10.1038/ng.2728