Digenic mutations in severe myoclonic epilepsy of infancy.

Abstract:

The clinical features of severe myoclonic epilepsy of infancy (SMEI) resemble those of mitochondrial diseases, although most patients have the sodium channel (SCN1A) mutation. We describe a patient with SMEI and enlarged muscle mitochondria associated with mutations in mitochondrial polymerase gamma 1 (POLG1) and SCN1A. Due to increased risk of valproate-induced liver failure in patients with POLG1 mutations, we recommend POLG1 gene analysis for SMEI patients before valproate administration.

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Health/Disease

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new topics/pols set partial results complete validated

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