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A novel splice site mutation in the SERPING1 gene leads to haploinsufficiency by complete degradation of the mutant allele mRNA in a case of familial hereditary angioedema.
J Clin Immunol ; 34(5): 521-3, 2014 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-24760113
ABSTRACT
Hereditary angioedema due to C1-inhibitor deficiency (HAE-C1INH) is a rare autosomal-dominant and life-threatening disorder caused by mutations in SERPING1 gene. It is characterized by attacks of angioedema involving the skin and/or the mucosa of the upper airways, as well as the intestinal mucosa. Here we report the case of a patient with HAE-C1INH without family history of angioedema. By sequencing the SERPING1 gene we detected a novel mutation (c.1249 + 5G > A) affecting the 5' donor splice site in intron 7. We analyzed the SERPING1 cDNA expecting a defect in splicing process but only the wild type allele was detected. SNP analysis of the cDNA sequence demonstrated that only one of the two alleles was present, indicating that the mRNA from the mutated allele was completely degraded. This study reinforces the concept of incomplete penetrance of this disorder since the patients' mother never presented any sign of angioedema despite carrying the same mutation.
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Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Assunto principal: RNA Mensageiro / Proteínas Inativadoras do Complemento 1 / Estabilidade de RNA / Angioedemas Hereditários / Haploinsuficiência / Mutação Limite: Adulto / Feminino / Humanos Idioma: Inglês Revista: J Clin Immunol Ano de publicação: 2014 Tipo de documento: Artigo País de afiliação: Espanha