Key result
SCN1B mutations linked to diverse epilepsy syndromes ranging from febrile seizures to severe encephalopathies.
Why the study?
SCN1B mutations have been associated with a spectrum of epilepsy phenotypes, but the full range and implications of these mutations require clarification.
This review highlights the expanding phenotypic spectrum of SCN1B mutations in epilepsy, ranging from mild febrile seizures to severe developmental and epileptic encephalopathies.
May broaden SCN1B testing in atypical pediatric epilepsy; hypothesis-generating and requires validation before practice change.
One of the first reported genes associated with epilepsy was SCN1B, which encodes for β-subunit of voltage-gated sodium channel of excitable cells and it is critical for neuronal function in both central and peripheral nervous system. β-subunits modulate the expression levels and functional properties of sodium channels and though their immunoglobulin domains may mediate interactions between channels and other proteins. Traditionally, SCN1B mutations were associated with generalized epilepsy with febrile seizures plus, a familial epilepsy syndrome characterized by heterogeneous phenotypes including febrile seizures (FS), febrile seizures plus (FS + ), mild generalized epilepsies, and severe epileptic encephalopathies. Throughout the years, SCN1B mutations have been also associated with Dravet syndrome and, more recently, with developmental and epileptic encephalopathies, expanding the spectrum associated with this gene mutations to more severe phenotypes.
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Pasquetti et al. (2021) conducted a review in Epilepsy. SCN1B gene mutations was evaluated. SCN1B gene mutations are associated with a spectrum of epilepsy syndromes, ranging from generalized epilepsy with febrile seizures plus to severe developmental and epileptic encephalopathies.
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