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  • Title: Novel de novo mutation of a conserved SCN1A amino-acid residue (R1596).
    Author: Dlugos DJ, Ferraro TN, Buono RJ.
    Journal: Pediatr Neurol; 2007 Oct; 37(4):303-5. PubMed ID: 17903680.
    Abstract:
    We report on the case of a 6-year-old boy with epilepsy involving febrile seizures and unprovoked generalized tonic clonic seizures. Genetic testing revealed a novel de novo mutation in the SCN1A gene (C>T 4786, R1596C). The epilepsy phenotype is within the spectrum of generalized epilepsy with febrile seizures plus. However, de novo mutations are more commonly reported in cases of severe myoclonic epilepsy of infancy, and are less often reported in generalized epilepsy with febrile seizures plus. The clinical utility of specific genetic testing in this case is discussed, as are criteria for determining the pathologic significance of novel DNA variants. In this case, the wild type of residue (R1596) is well-conserved across evolution from bacteria to humans, providing support for the hypothesis that this mutation causes epilepsy.
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