|Grant Number:||5R01CA131218-04 Interpret this number|
|Primary Investigator:||Eliassen, A. Heather|
|Organization:||Brigham And Women'S Hospital|
|Project Title:||Oxidative Stree, Antioxidants and Risk of Breast Cancer: a Prospective Analysis|
Abstract In this application, we propose several studies to substantially improve our understanding of the role of oxidative stress and antioxidants in breast carcinogenesis. Circulating levels of fluorescent oxidation products, an innovative marker of overall oxidative stress, have been associated with an increased risk of cardiovascular disease, but to our knowledge, have not been investigated in relation to breast cancer risk. Carotenoids, prominent micronutrients in fruits and vegetables, have been of specific interest in breast cancer because of their antioxidant properties. Although findings from epidemiologic studies of dietary intake have been mixed, recent data have shown a protective effect of plasma carotenoid levels on breast cancer risk. Specifically, 5 of 6 prospective studies of plasma carotenoids, including our own previous work in the Nurses' Health Study (NHS), found significant or suggestive inverse associations with breast cancer risk. However, the specific carotenoid(s) associated with risk has not been consistent across studies, the importance of timing has not been well addressed, and subgroup analyses have been underpowered. Finally, we propose to examine the association between breast cancer risk and variation in antioxidant enzyme and carotenoid metabolism genes, and the interactions between these genes, as well as DNA repair genes, and the plasma markers. To our knowledge only a prior initial analysis of 1 of these genes within the NHS has investigated the interactions with plasma carotenoids, and none has examined the interactions with oxidative stress. Within the NHS cohort, with archived blood samples and a wealth of data on breast cancer risk factors, we propose an in depth, prospective investigation of plasma markers of oxidative stress, plasma carotenoids, and genetic variation. In this study, we will utilize archived (stored at d -130¿C) blood samples collected in 1989-1990 from 32,826 women in the NHS; 18,743 of these women donated a 2nd sample in 2000. Our nested case-control design will efficiently utilize these prospectively collected samples. A unique strength of this study is the availability of 2 measures collected 10 years apart to examine the timing of exposure in the pathogenic process among approximately 700 cases confirmed after the 2nd blood collection through 2008. In our carotenoids analyses, utilizing our prior data, we will have approximately 2000 cases diagnosed 1990-2008 to more thoroughly assess specific carotenoids and conduct important subgroup analyses. Similarly, in the genetic analyses we will have over 2000 cases to address the main effects of genetic variation in antioxidant and carotenoid metabolism genes, as well as interactions between these genes, DNA repair genes, and the plasma markers. This study provides an ideal context in which to investigate these associations, given the prospective nature, extensive covariate information, and an ongoing, high rate of follow-up (98% in the blood cohort). Our proposed study should contribute substantially to our understanding of the relationships between the oxidative stress pathway and breast cancer risk and the role of antioxidants in protecting against oxidative damage.
Phobic Anxiety and Plasma Levels of Global Oxidative Stress in Women.
Authors: Hagan K.A. , Wu T. , Rimm E.B. , Eliassen A.H. , Okereke O.I. .
Source: The European journal of psychiatry, 2015 Jan-Mar; 29(1), p. 7-20.
Plasma carotenoids and risk of breast cancer over 20 y of follow-up.
Authors: Eliassen A.H. , Liao X. , Rosner B. , Tamimi R.M. , Tworoger S.S. , Hankinson S.E. .
Source: The American journal of clinical nutrition, 2015 Jun; 101(6), p. 1197-205.
EPub date: 2015-04-15.
Association between global biomarkers of oxidative stress and hip fracture in postmenopausal women: a prospective study.
Authors: Yang S. , Feskanich D. , Willett W.C. , Eliassen A.H. , Wu T. .
Source: Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research, 2014 Dec; 29(12), p. 2577-83.
Plasma florescent oxidation products and breast cancer risk: repeated measures in the Nurses' Health Study.
Authors: Fortner R.T. , Tworoger S.S. , Wu T. , Eliassen A.H. .
Source: Breast cancer research and treatment, 2013 Sep; 141(2), p. 307-16.
EPub date: 2013-09-18.
Plasma carotenoid- and retinol-weighted multi-SNP scores and risk of breast cancer in the National Cancer Institute Breast and Prostate Cancer Cohort Consortium.
Authors: Hendrickson S.J. , Lindström S. , Eliassen A.H. , Rosner B.A. , Chen C. , Barrdahl M. , Brinton L. , Buring J. , Canzian F. , Chanock S. , et al. .
Source: Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology, 2013 May; 22(5), p. 927-36.
EPub date: 2013-03-20.
Circulating carotenoids and risk of breast cancer: pooled analysis of eight prospective studies.
Authors: Eliassen A.H. , Hendrickson S.J. , Brinton L.A. , Buring J.E. , Campos H. , Dai Q. , Dorgan J.F. , Franke A.A. , Gao Y.T. , Goodman M.T. , et al. .
Source: Journal of the National Cancer Institute, 2012-12-19; 104(24), p. 1905-16.
EPub date: 2012-12-06.
?-Carotene 15,15'-monooxygenase 1 single nucleotide polymorphisms in relation to plasma carotenoid and retinol concentrations in women of European descent.
Authors: Hendrickson S.J. , Hazra A. , Chen C. , Eliassen A.H. , Kraft P. , Rosner B.A. , Willett W.C. .
Source: The American journal of clinical nutrition, 2012 Dec; 96(6), p. 1379-89.
EPub date: 2012-11-07.
Genome-wide association study identifies common variants associated with circulating vitamin E levels.
Authors: Major J.M. , Yu K. , Wheeler W. , Zhang H. , Cornelis M.C. , Wright M.E. , Yeager M. , Snyder K. , Weinstein S.J. , Mondul A. , et al. .
Source: Human molecular genetics, 2011-10-01; 20(19), p. 3876-83.
EPub date: 2011-07-05.