De novo DNM1 mutations in two cases of epileptic encephalopathy.
Epilepsia
; 57(1): e18-23, 2016 Jan.
Article
en En
| MEDLINE
| ID: mdl-26611353
ABSTRACT
Dynamin 1 (DNM1) is a large guanosine triphosphatase involved in clathrin-mediated endocytosis. In recent studies, de novo mutations in DNM1 have been identified in five individuals with epileptic encephalopathy. In this study, we report two patients with early onset epileptic encephalopathy possessing de novo DNM1 mutations. Using whole exome sequencing, we detected the novel mutation c.127G>A (p.Gly43Ser) in a patient with Lennox-Gastaut syndrome, and a recurrent mutation c.709C>T (p.Arg237Trp) in a patient with West syndrome. Structural consideration of DNM1 mutations revealed that both mutations would destabilize the G domain structure and impair nucleotide binding, dimer formation, and/or GTPase activity of the G domain. These and previous cases of DNM1 mutations were reviewed to verify the phenotypic spectrum. The main clinical features of DNM1 mutations include intractable seizures, intellectual disability, developmental delay, and hypotonia. Most cases showed development delay before the onset of seizures. A patient carrying p.Arg237Trp in this report showed a different developmental status from that of a previously reported case, together with characteristic extrapyramidal movement.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Espasmos Infantiles
/
Dinamina I
/
Síndrome de Lennox-Gastaut
/
Mutación
Tipo de estudio:
Prognostic_studies
Límite:
Adolescent
/
Humans
/
Infant
/
Male
Idioma:
En
Revista:
Epilepsia
Año:
2016
Tipo del documento:
Article
País de afiliación:
Japón