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We describe here a case-control study to identify associations between polymorphisms at the methylenetetrahydrofolate reductase (MTHFR) and cytochrome P-450 1A1 (CYP1A1) genes and susceptibility to endometrial cancer. Accordingly, genotype frequencies in 80 endometrial carcinoma patients were compared with frequencies in 60 controls. DNA analysis suggest a significantly increased endometrial cancer risk with an alanine to valine substitution at nucleotide 677 of MTHFR gene with an odds ratio of 2.8 (95% confidence interval: 1.36-6.14, P = 0.002). Moreover, the tumors from patients with the valine allele were more undifferentiated (P = 0.03). On the other hand, a recently described mutation in exon 7 of CYP1A1 gene (threonine exchanged to asparagine in codon 461) showed a strong association with endometrial cancer risk with an odds ratio of 6.36 (95% confidence interval: 1.99-26.5, P = 0.0004). Thus, this study suggests that polymorphisms at MTHFR and a novel CYP1A1 variant could influence susceptibility to endometrial cancer, although larger sample sizes would be required to corroborate these findings.

carcinogenesis

Germ line polymorphisms in cytochrome-P450 1A1 (C4887 CYP1A1) and methylenetetrahydrofolate reductase (MTHFR) genes and endometrial cancer susceptibility