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Two novel EIF2S3 mutations associated with syndromic intellectual disability with severe microcephaly, growth retardation, and epilepsy.

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Moortgat, Stéphanie Désir, Julie Benoit, Valérie Boulanger, Sébastien Pendeville, Hélène Nassogne, Marie-Cécile [UCL] Maystadt, Isabelle

X-chromosome exome sequencing was performed to identify the genetic cause of syndromic intellectual disability in two unrelated families with suspected X-linked inheritance. In both families, affected males presented with severe intellectual disability, microcephaly, growth retardation, and epilepsy. A missense mutation (c.777T>G p.(Ile259Met)) and a frameshift mutation (c.1394_1397del p.(Ile465Serfs*4)) were identified in the EIF2S3 gene in the hemizygous state in affected patients, and in the heterozygous states female obligate carriers. A missense mutation in EIF2S3, coding for the gamma-subunit of the translation initiation factor eIF2, was reported once in a family presenting with similar clinical features. Morpholino-based knockdown of the zebrafish EIF2S3 ortholog (eif2s3) recapitulates the human microcephaly and short stature phenotype, supporting the pathogenicity of the identified variants. Our data confirm that EIF2S3 mutation is implicated in a rare, but recognizable, form of syndromic intellectual disability. © 2016 Wiley Periodicals, Inc.

Document type Article de périodique (Journal article) – Article de recherche
Access type Accès restreint
Publication date 2016
Language Anglais
Journal information "American Journal of Medical Genetics. Part A" - Vol. 170, no.11, p. 2927-2933 (2016)
Peer reviewed yes
Publisher JohnWiley & Sons, Inc. ((United States) Hoboken, NJ)
issn 1552-4825
e-issn 1552-4833
Publication status Publié
Affiliations UCL - SSS/IONS/NEUR - Clinical Neuroscience
UCL - (SLuc) Service de neurologie pédiatrique
Keywords X-exome sequencing ; X-linked intellectual disability ; Epilepsy ; Microcephaly ; Morpholino ; Zebrafish
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Bibliographic reference Moortgat, Stéphanie ; Désir, Julie ; Benoit, Valérie ; Boulanger, Sébastien ; Pendeville, Hélène ; et. al. Two novel EIF2S3 mutations associated with syndromic intellectual disability with severe microcephaly, growth retardation, and epilepsy.. In: American Journal of Medical Genetics. Part A, Vol. 170, no.11, p. 2927-2933 (2016)
Permanent URL http://hdl.handle.net/2078.1/184941