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

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

作者机构：Fred Hutchinson Cancer Research Center Seattle USA Group Health Research Institute Seattle USA Merck & Co. Inc. North Wales USA University of Bristol Bristol UK University of Nebraska Medical Center Omaha USA University of Washington Seattle USA 

出 版 物：《Open Journal of Preventive Medicine》 (预防医学期刊（英文）)

年 卷 期：2014年第4卷第6期

页      面：429-437页

学科分类：1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学] 

主　　题：Breast Cancer Nutritional Assessment Biomarker Estrogens 

摘      要：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 ratio in 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 ultra performance 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.