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Role of the mitochondrial mutations, m.827A>G and the novel m.7462C>T, in the origin of hearing loss.
Uehara, Daniela Tiaki; Rincon, Daniel; Abreu-Silva, Ronaldo Serafim; Auricchio, Maria Teresa Balester de Mello; Tabith, Alfredo; Kok, Fernando; Mingroni-Netto, Regina Célia.
Afiliação
  • Uehara DT; Departamento de Genética e Biologia Evolutiva, Universidade de São Paulo, São Paulo, Brazil.
Genet Test Mol Biomarkers ; 14(5): 611-6, 2010 Oct.
Article em En | MEDLINE | ID: mdl-20722495
Samples from 30 deaf probands exhibiting features suggestive of syndromic mitochondrial deafness or from families with maternal transmission of deafness were selected for investigation of mutations in the mitochondrial genes MT-RNR1 and MT-TS1. Patients with mutation m.1555A>G had been previously excluded from this sample. In the MT-RNR1 gene, five probands presented the m.827A>G sequence variant, of uncertain pathogenicity. This change was also detected in 66 subjects of an unaffected control sample of 306 Brazilian individuals from various ethnic backgrounds. Given its high frequency, we consider it unlikely to have a pathogenic role on hereditary deafness. As to the MT-TS1 gene, one proband presented the previously known pathogenic m.7472insC mutation and three probands presented a novel variant, m.7462C>T, which was absent from the same control sample of 306 individuals. Because of its absence in control samples and association with a family history of hearing impairment, we suggest it might be a novel pathogenic mutation.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: DNA Mitocondrial / RNA Ribossômico / RNA de Transferência de Serina / Mutação Puntual / Surdez / Perda Auditiva Neurossensorial Limite: Female / Humans / Male País/Região como assunto: America do sul / Brasil Idioma: En Revista: Genet Test Mol Biomarkers Assunto da revista: BIOLOGIA MOLECULAR / GENETICA Ano de publicação: 2010 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: DNA Mitocondrial / RNA Ribossômico / RNA de Transferência de Serina / Mutação Puntual / Surdez / Perda Auditiva Neurossensorial Limite: Female / Humans / Male País/Região como assunto: America do sul / Brasil Idioma: En Revista: Genet Test Mol Biomarkers Assunto da revista: BIOLOGIA MOLECULAR / GENETICA Ano de publicação: 2010 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos