De novo GRIN1 mutations: An emerging cause of severe early infantile encephalopathy.
Eur J Med Genet
; 60(6): 317-320, 2017 Jun.
Article
em En
| MEDLINE
| ID: mdl-28389307
ABSTRACT
De novo GRIN1 mutations have recently been shown to cause severe intellectual disability, hypotonia, hyperkinetic and stereotyped movements, and epilepsy. We report two new cases of severe early onset encephalopathy associated with hyperkinetic and oculogyric-like movements, caused by mutations in the GRIN1 gene; both were identified by whole exome sequencing. One of the patients harbored the novel mutation p.Ser688Tyr and the other patient harbored the p.Gly827Arg mutation, which was previously reported in three patients. In silico studies suggested that the p.Se688Tyr mutation results in disruption of NMDA ligand binding and the p.Gly827Arg mutation results in disrupted gating of the ion channel. Our study highlights the importance of GRIN1 mutations in the etiology of isolated cases of early onset encephalopathy, and the valuable role of whole exome sequencing in identifying these mutations.
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Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Encefalopatias
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Deficiências do Desenvolvimento
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Receptores de N-Metil-D-Aspartato
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Mutação de Sentido Incorreto
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Hipercinese
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Hipotonia Muscular
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Proteínas do Tecido Nervoso
Tipo de estudo:
Diagnostic_studies
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Prognostic_studies
Limite:
Child, preschool
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Female
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Humans
Idioma:
En
Revista:
Eur J Med Genet
Assunto da revista:
GENETICA MEDICA
Ano de publicação:
2017
Tipo de documento:
Article
País de afiliação:
Israel