New mutations in the GLA gene in Brazilian families with Fabry disease
| Autor: | Karen Barbosa Müller, Charles Marques Lourenço, Wilson Marques, Juliana Gilbert Pessoa, João Bosco Pesquero, Fabiana Louise Motta, Lauro Thiago Turaça, Vania D'Almeida, Maria Verônica Munoz Rojas, Ana Maria Martins |
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| Rok vydání: | 2012 |
| Předmět: |
Male
medicine.medical_specialty Nonsense mutation Biology medicine.disease_cause Bioinformatics Exon Molecular genetics Genetics medicine Missense mutation Humans Family Genetic Predisposition to Disease Gene Genetics (clinical) Mutation Exons Sequence Analysis DNA medicine.disease Fabry disease Stop codon alpha-Galactosidase Fabry Disease Female RNA Splice Sites Brazil |
| Zdroj: | Journal of human genetics. 57(6) |
| ISSN: | 1435-232X |
| Popis: | Fabry disease (FD) is an X-linked inborn error of glycosphingolipid catabolism that results from mutations in the alpha-galactosidase A (GLA) gene. Evaluating the enzymatic activity in male individuals usually performs the diagnosis of the disease, but in female carriers the diagnosis based only on enzyme assays is often inconclusive. In this work, we analyzed 568 individuals from 102 families with suspect of FD. Overall, 51 families presented 38 alterations in the GLA gene, among which 19 were not previously reported in literature. The alterations included 17 missense mutations, 7 nonsense mutations, 7 deletions, 6 insertions and 1 in the splice site. Six alterations (R112C, R118C, R220X, R227X, R342Q and R356W) occurred at CpG dinucleotides. Five mutations not previously described in the literature (A156D, K237X, A292V, I317S, c.1177_1178insG) were correlated with low GLA enzyme activity and with prediction of molecular damages. From the 13 deletions and insertions, 7 occurred in exons 6 or 7 (54%) and 11 led to the formation of a stop codon. The present study highlights the detection of new genomic alterations in the GLA gene in the Brazilian population, facilitating the selection of patients for recombinant enzyme-replacement trials and offering the possibility to perform prenatal diagnosis. |
| Databáze: | OpenAIRE |
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