Antioxidant and DNA methylation-related nutrients and risk of distal colorectal cancer.

Published

Journal Article

OBJECTIVE: To investigate the relationship between antioxidant nutrients (vitamins C and E, beta-carotene, selenium) and DNA methylation-related nutrients (folate, vitamins B6 and B12) and distal colorectal cancer risk in whites and African Americans and to examine intakes from food only versus total (food plus dietary supplements) intakes. METHODS: Data are from the North Carolina Colon Cancer Study-Phase II, a case-control study of 945 distal colorectal cancer (including sigmoid, rectosigmoid, and rectum) cases and 959 controls. In-person interviews captured usual dietary intake and various covariates. Multivariate logistic regression was used to calculate odds ratios (OR) and 95% confidence intervals (95% CI). RESULTS: High intakes of each antioxidant and DNA methylation-related nutrient were significantly associated with lower risk in whites. In African Americans, the highest category of selenium from food only had a marginally significant inverse association with distal colorectal cancer risk (Q4 vs. Q1 OR: 0.55, 95% CI 0.29-1.02). Supplements did not provide additional risk reduction beyond intakes from food. CONCLUSIONS: Our findings provide evidence that antioxidant and DNA methylation-related nutrients may lower the risk of distal colorectal cancer in whites, and selenium may lower risk in African Americans. Optimal micronutrient intakes from food alone may be more beneficial than supplementation.

Full Text

Duke Authors

Cited Authors

  • Williams, CD; Satia, JA; Adair, LS; Stevens, J; Galanko, J; Keku, TO; Sandler, RS

Published Date

  • August 2010

Published In

Volume / Issue

  • 21 / 8

Start / End Page

  • 1171 - 1181

PubMed ID

  • 20352485

Pubmed Central ID

  • 20352485

Electronic International Standard Serial Number (EISSN)

  • 1573-7225

Digital Object Identifier (DOI)

  • 10.1007/s10552-010-9544-3

Language

  • eng

Conference Location

  • Netherlands