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Mutations in SCN2A cause epilepsy syndromes of variable severity including neonatal-infantile seizures. In one case, we previously described additional childhood-onset episodic ataxia. Here, we corroborate and detail the latter phenotype in three further cases. We describe the clinical characteristics, identify the causative SCN2A mutations and determine their functional consequences using whole-cell...
Missense mutations in SCN2A, encoding the brain sodium channel NaV1.2, have been described in benign familial neonatal‐infantile seizures (BFNIS), a self‐limiting disorder, whereas several SCN2A de novo nonsense mutations have been found in patients with more severe phenotypes including epileptic encephalopathy. We report a family with BFNIS originating from Madagascar. Onset extended from 3 to 9 months...
We tested the hypothesis that genetic variation in the human sodium channel gene SCN2A confers liability to idiopathic generalized epilepsy (IGE). We performed a systematic search for mutations in 46 familial IGE cases and detected three novel polymorphisms, however, allele frequencies did not differ significantly between patients and controls. A rare mutation (R1918H) was identified in one patient...
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