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Medline ® Abstract for Reference 17

of 'Sleepwalking and other parasomnias in children'

17
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Autosomal dominant nocturnal frontal lobe epilepsy with a mutation in the CHRNB2 gene.
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Díaz-Otero F, Quesada M, Morales-Corraliza J, Martínez-Parra C, Gómez-Garre P, Serratosa JM
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Epilepsia. 2008 Mar;49(3):516-20. Epub 2007 Sep 26.
 
Autosomal dominant nocturnal frontal lobe epilepsy (ADNFLE; MIM 600513) has been associated with mutations in the genes coding for the alfa-4 (CHRNA4), beta-2 (CHRNB2), and alpha-2 (CHRNA2) subunits of the neuronal nicotinic acetylcholine receptor (nAChR) and for the corticotropin-releasing hormone (CRH). A four-generation ADNFLE family with six affected members was identified. All affected members presented the clinical characteristics of ADNFLE. Interictal awake and sleep EEG recordings showed no epileptiform abnormalities. Ictal video-EEG recordings showed focal seizures with frontal lobe semiology. Mutation analysis of the CHRNB2 gene revealed a c.859G>A transition (Val287Met) within the second transmembrane domain, identical to that previously described in a Scottish ADNFLE family. To our knowledge, this is the third family reported presenting a mutation in CHRNB2. The clinical phenotype appears similar to that described with mutations in CHRNA4, suggesting that mutations in these two subunits lead to similar functional alterations of the nAChR.
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Epilepsy Unit, Neurology Service, Fundación Jiménez Díaz, Madrid, Spain.
PMID