Polymorphism of xenobiotic-metabolizing genes and breast cancer susceptibility in North Indian women.
Genet Test Mol Biomarkers
; 15(5): 343-9, 2011 May.
Article
em En
| MEDLINE
| ID: mdl-21329464
ABSTRACT
NAD(P)Hquinone oxidoreductase 1 (NQO1) and cytochrome P450 1A2 (CYP1A2) are involved in the metabolism of estrogens. Genetic polymorphisms in these genes may lead to interindividual variation in breast cancer susceptibility. This study was undertaken to investigate the association of NQO1 exon 6 proline187serine (C609T) and CYP1A2 exon 2 phenylalanine21leucine (C63G) polymorphisms with breast cancer susceptibility in North Indian women. Polymorphisms were analyzed by polymerase chain reaction amplification of the desired segment of NQO1 and CYP1A2 genes followed by restriction fragment length polymorphism. NQO1 mRNA expression was analyzed by semiquantitative reverse transcription-polymerase chain reaction and its enzyme activity was estimated spectrofluorophotometrically. Odds ratios for NQO1 C609T heterozygous and homozygous variants were 0.66 (95% confidence interval 0.39-1.13; p-value 0.141) and 1.07 (95% confidence interval 0.46-2.46; p-value 0.976). All cases and controls were monomorphic for the CYP1A2 exon 2 phenylalanine21leucine (C63G) genotype. NQO1 mRNA expression and its catalytic activity among wild-type genotype, homozygous variant, and heterozygous variant were not significantly altered, except for catalytic activity of the NQO1 homozygous variant, which was observed extremely low. The results of the study suggest that NQO1 exon 6 proline187serine (C609T) and CYP1A2 exon 2 phenylalanine21leucine (C63G) polymorphisms do not play a significant role in breast cancer susceptibility in North Indian women.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Neoplasias da Mama
/
NAD(P)H Desidrogenase (Quinona)
/
Citocromo P-450 CYP1A2
/
Predisposição Genética para Doença
/
Polimorfismo de Nucleotídeo Único
/
População Branca
Limite:
Adult
/
Female
/
Humans
/
Middle aged
País/Região como assunto:
Asia
Idioma:
En
Revista:
Genet Test Mol Biomarkers
Assunto da revista:
BIOLOGIA MOLECULAR
/
GENETICA
Ano de publicação:
2011
Tipo de documento:
Article
País de afiliação:
Índia