Associations between Dietary Intake of Fruits and Vegetables in relation to Urinary Estrogen DNA Adduct Ratio

Kerryn W Reding, Muhammad Zahid, Ercole Cavalieri, Eleanor G Rogan, Brianne S Raccor, Charlotte Atkinson, Mellissa Yong, Katherine M Newton, Johanna W Lampe

Research output: Contribution to journalArticle (Academic Journal)peer-review

Abstract

BACKGROUND: Estrogen exposure plays a role in breast cancer (BC) development. A novel estrogen biomarker, the estrogen DNA adduct (EDA) ratio, was shown to be elevated in women at high-risk of BC and among BC cases. Modifiable factors may impact the EDA ratio, with studies demonstrating that resveratrol reduces EDA ratioin vitro. We sought to examine the hypothesis that dietary intake of fruits and vegetables is inversely associated with EDA ratio.

METHODS: This analysis was conducted in 53 pre-menopausal, healthy women aged 40-45 years from a cross-sectional study in which participants provided first-void urine samples and 3-day food records. Urine samples were analyzed using ultraperformance liquid chromatography/tandem mass spectrometry. The EDA ratio was calculated as the estrogen-DNA adducts divided by estrogen metabolites and conjugates. A trend test was used to assess associations between tertiles of dietary intake using linear regression.

RESULTS: After adjustment for age, total energy, percent adiposity, serum estradiol and estrone-sulfate, we observed inverse associations of EDA ratio with carbohydrate consumption (P=0.01) and vegetable intake (P=0.01). EDA ratio was inversely associated with 5 botanical groups (Chenopodiaceae:P=0.02; Umbelliferae:P=0.03; Compositae:P=0.01; Ericaceae:P=0.01; Musaceae:P=0.03) but not fruit intake overall.

CONCLUSION: Although these data require replication before conclusions are drawn, this report suggests an inverse association between vegetable and carbohydrate consumption and EDA ratio.

IMPACT: While more information is still needed, these findings suggest a link between dietary intake and a biomarker that is both associated with high-risk BC status and associated with modifiable factors.

Original languageEnglish
Pages (from-to)429-437
Number of pages9
JournalOpen Journal of Preventive Medicine
Volume4
Issue number6
DOIs
Publication statusPublished - Jun 2014

Keywords

  • Journal Article

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