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Two novel mutations in the EIF2AK3 gene in children with Wolcott–Rallison syndrome
Author(s) -
Reis André F,
Kannengiesser Caroline,
Jennane Farida,
Manna Thais Della,
Cheurfa Nadir,
Oudin Claire,
Savoldelli Roberta Diaz,
Oliveira Carolina,
Grandchamp Bernard,
Kok Fernando,
Velho Gilberto
Publication year - 2011
Publication title -
pediatric diabetes
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.678
H-Index - 75
eISSN - 1399-5448
pISSN - 1399-543X
DOI - 10.1111/j.1399-5448.2010.00679.x
Subject(s) - medicine , frameshift mutation , pediatrics , exon , gene duplication , diabetes mellitus , genetics , endocrinology , gene , biology
Reis AF, Kannengiesser C, Jennane F, Manna TD, Cheurfa N, Oudin C, Savoldelli RD, Oliveira C, Grandchamp B, Kok F, Velho G. Two novel mutations in the EIF2AK3 gene in children with Wolcott–Rallison syndrome. Wolcott–Rallison syndrome (WRS, OMIM 226980) is a rare autosomal recessive disorder characterized by permanent neonatal diabetes mellitus, epiphyseal dysplasia, and other multisystemic clinical manifestations. We described two novel mutations in the EIF2AK3 gene in two consanguineous families with WRS from Brazil and Morocco. We have observed in case 1 a homozygous C > T replacement at base pair c.1192 at exon 7, generating a stop codon at position 398 (Gln398Stop). Both of his parents were found to be heterozygous for the mutation. We detected in both parents of case 2, a deceased Moroccan girl, a duplication of base pair c.851A at exon 5 (c.851dupA) leading to a frameshift and a stop codon at position 285 (p.Pro285AlafsX3). Both cases 1 and 2 had neonatal diabetes mellitus, multiple epiphyseal dysplasia, and growth delay, and presented episodes of acute hepatic dysfunction. Case 1 presented central hypothyroidism, developmental delay, and mild mental retardation. Case 2 presented a fatal episode of acute renal failure. The clinical phenotype associated with the syndrome can be variable, but a combination of infancy‐onset diabetes mellitus, multiple epiphyseal dysplasia, and hepatic and/or renal dysfunction is the mainstay of diagnosis.