Samenvatting
Mutaties in het SCN1A-gen, dat codeert voor de a1-subunit van een neuronaal spanningsafhankelijk natriumkanaal, worden voornamelijk gevonden bij patiënten met severe myoclonic epilepsy of infancy (SMEI) en in families met generalized epilepsy with febrile seizures plus (GEFS+). Patiënten met SMEI hebben overwegend truncerende mutaties of missense mutaties in functioneel belangrijke delen van het gen. In GEFS+-families worden overwegend missense mutaties gevonden. Het detecteren van een pathogene SCN1A-mutatie kan consequenties hebben voor de behandeling van de epilepsie, maakt verder etiologisch onderzoek onnodig en geeft informatie over het herhalingsrisico voor familieleden.
Summary
Mutations in the voltage-gated sodium channel subunit gene, SCN1A, are identified predominantly in patients with severe myoclonic epilepsy of infancy (SMEI) and in families with generalized epilepsy with febrile seizures plus (GEFS+). Patients with SMEI have predominantly truncating mutations or missense mutations in functionally important segments of the ion channel. In GEFS+ families predominantly missense mutations are found. The finding of a pathogenic SCN1A mutation may have consequences for the anti-epileptic treatment, helps to avoid further diagnostic procedures and provides information on the recurrence risk for siblings and other relatives.
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Mw. drs. N. Dekker, arts, mw. dr. M.J.A. van Kempen, klinisch moleculair geneticus i.o., dhr. prof. dr. D. Lindhout, kinderarts en klinisch geneticus, mw. dr. E.H. Brilstra, klinisch geneticus, afdeling Medische Genetica, Divisie Biomedische Genetica; dhr. prof. dr. O. van Nieuwenhuizen, kinderneuroloog, afdeling Kinderneurologie, Divisie Hersenen, Wilhel-mina Kinderziekenhuis, UMC Utrecht.
Correspondentieadres: Mw. dr. E.H. Brilstra, afdeling Medische Genetica, Wilhelmina Kinderziekenhuis, UMC Utrecht, Postbus 85090, 3508 AB Utrecht
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Dekker, N., van Kempen, M.J.A., Lindhout, D. et al. Epilepsie en het SCN1A-gen. KIND 76, 254–258 (2008). https://doi.org/10.1007/BF03078214
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DOI: https://doi.org/10.1007/BF03078214