Polymorphisms in metabolism/antioxidant genes may mediate the effect of dietary intake on pancreatic cancer risk.

ABSTRACT: A source of variation for inconsistent dietary-pancreatic cancer associations may be individuals carrying constitutional metabolism/antioxidant gene variants that differentially benefit compared to homozygous individuals. Seventy-six tag single-nucleotide polymorphisms were genotyped in 13 candidate genes to test differential associations with pancreatic adenocarcinoma.A clinic-based case-control design was used to rapidly ascertain 251 cases and 970 frequency matched controls who provided blood samples and completed a 144-item food frequency questionnaire. Single-nucleotide polymorphisms were evaluated using a dominant genetic model and dietary categories split on controls' median intake. Logistic regression was used to calculate odds ratios and 95% confidence intervals, adjusted for potential confounders.Significant increased associations (Bonferroni corrected P ? 0.0007) were observed for carriers of greater than or equal to 1 minor allele for rs3816257 (glucosidase, ?; acid [GAA]) and lower intake of deep-yellow vegetables (1.90 [1.28-2.83]); and carriers of no minor allele for rs12807961 (catalase [CAT]) and high total grains intake (2.48 [1.50-4.09]), whereas those with greater than or equal to 1 minor allele had a decreasing slope (across grains). The reference group was no minor alleles with low dietary intake.Interindividual variation in metabolism/antioxidant genes could interact with dietary intake to influence pancreatic cancer risk.

SUBMITTER: Jansen RJ 

PROVIDER: S-EPMC3779344 | biostudies-literature | 2013 Oct

REPOSITORIES: biostudies-literature