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Type: Artigo de periódico
Title: Pollymorphisms in the CBS Gene and Homocysteine, Folate and Vitamin B-12 Levels: Association With Polymorphisms in the MTHFR and MTRR Genes in Brazilian Children
Author: Alessio, ACM
Siqueira, LH
Bydlowski, SP
Hoehr, NF
Annichino-Bizzacchi, JM
Abstract: Polymorphisms in the methylenetetrahydrofolate reductase (MTHFR), methionine synthase reductase (MTRR) and cystathionine P-synthase (CBS) genes, involved in the intracellular metabolism of homocysteine (Hcy), can result in hyperhomocysteinemia. The objective of this study was to evaluate prevalence estimates of CBS T833C, G919A and the insertion of 68-bp (844ins68) polymorphisms and their correlation with Hcy, folate and 131, in 220 children previously genotyped for MTHFR C677T, A1298C, and MTRR A66G. The prevalence of heterozygote children for 844ins68 was 19.5%. The T833C CBS mutation was identified in association with 844ins68 in all the carriers of the insertion. Genotyping for CBS G919A mutation showed that all the children presented the GG genotype. Analysis of Hcy, B-12 and folate, according to the combination of the different genotypes of the C677T and A1298C MTHFR, A66G MTRR, and 844ins68 CBS showed that the 677TT/1298AA/68WW genotype is associated with an increase in Hcy, when compared to the 677CC/1298AC/68WW (P = 0.033) and the 677CT/1298AA/68WW genotypes (P = 0.034). Since B-12 and folate were not different between these groups, a genetic interaction between diverse polymorphisms probably influences Hcy. Our results emphasize the role of genetic interactions in Hcy levels. (C) 2008 Wiley-Liss, Inc.
Subject: homocysteine
CBS gene
vitamin B-12
MTHFR gene
MTRR gene
Country: EUA
Editor: Wiley-blackwell
Citation: American Journal Of Medical Genetics Part A. Wiley-blackwell, v. 146A, n. 20, n. 2598, n. 2602, 2008.
Rights: fechado
Identifier DOI: 10.1002/ajmg.a.32496
Date Issue: 2008
Appears in Collections:Unicamp - Artigos e Outros Documentos

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