Novel KCNB1 mutation associated with non-syndromic intellectual disability.
J Hum Genet
; 62(5): 569-573, 2017 Apr.
Article
em En
| MEDLINE
| ID: mdl-27928161
ABSTRACT
Potassium voltage-gated channel subfamily B member 1 (KCNB1) encodes Kv2.1 potassium channel of crucial role in hippocampal neuron excitation homeostasis. KCNB1 mutations are known to cause early-onset infantile epilepsy. To date, 10 KCNB1 mutations have been described in 11 patients. Using whole-exome sequencing, we identified a novel de novo missense (c.1132G>C, p.V378L) KCNB1 mutation in a patient with global developmental delay, intellectual disability, severe speech impairment, but no episode of epilepsy until the lastly examined age of 6 years old. Furthermore, she showed neuropsychiatric symptoms including hyperactivity with irritability, heteroaggressiveness, psychomotor instability and agitation. Our observation might expand the phenotypic spectrum of KCNB1-related phenotypes and raises the issue of the occurrence of the epileptic phenotype.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Predisposição Genética para Doença
/
Canais de Potássio Shab
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Deficiência Intelectual
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Mutação
Tipo de estudo:
Prognostic_studies
/
Risk_factors_studies
Limite:
Child, preschool
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Female
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Humans
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Infant
Idioma:
En
Ano de publicação:
2017
Tipo de documento:
Article