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Generalized epilepsy with febrile seizures plus (GEFS+) spectrum: clinical manifestations and SCN1A mutations in Indonesian patients.

Herini E.S., Gunadi Harahap I.S., Yusoff S., Morikawa S., Patria S.Y., Nishimura N., Sunartini Sutaryo S., Takada S., Matsuo M., Nishio H.

Generalized epilepsy with febrile seizures plus (GEFS+) is a childhood genetic epilepsy syndrome. GEFS+ includes a wide spectrum of clinical manifestations, and SCN1A mutations have frequently been reported among the GEFS+-related gene abnormalities. In this study, to clarify the distributions of the clinical subtypes, we analyzed 34 families with GEFS+ in Indonesia using the hospital records of the patients and questionnaires for the family members. The number of patients with febrile seizures plus (FS+), FS+ and afebrile generalized/partial seizures, borderline severe myoclonic epilepsy in infancy (SMEB) and severe myoclonic epilepsy in infancy (SMEI) were 9, 11, 7, and 7, respectively. Most patients had a family history of febrile seizures. Next, we performed molecular analyses to clarify the contributions of SCN1A mutations to the development of the GEFS+ subtypes. Only 3 of 34 probands showed SCN1A mutations. These mutations were two missense mutations, p.V1612I and p.C1756G, in two patients with SMEI and SMEB, and one silent mutation, p.G1762G, in a patient with FS+ and afebrile partial seizures. In conclusion, the majority of GEFS+ patients in Indonesia were not associated with SCN1A mutations. To detect the GEFS+-causing mutations, we must search and analyze other genes in these patients.

Epilepsy Res. 90:132-139(2010) [PubMed] [Europe PMC]

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