Do adipokines underlie the association between known risk factors and breast cancer among a cohort of United States women?

被引:40
作者
Gaudet, Mia M. [1 ]
Falk, Roni T. [2 ]
Gierach, Gretchen L. [2 ]
Lacey, James V., Jr. [2 ]
Graubard, Barry I. [2 ]
Dorgan, Joanne F. [3 ]
Brinton, Louise A. [2 ]
机构
[1] Albert Einstein Coll Med, Dept Epidemiol & Populat Hlth, Bronx, NY 10467 USA
[2] NCI, Div Canc Epidemiol & Biostat, Rockville, MD USA
[3] Fox Chase Canc Ctr, Div Populat Sci, Philadelphia, PA 19111 USA
关键词
Breast cancer; Adipokines; Obesity; Biomarkers; Epidemiology; ADIPOSE-TISSUE; PLASMINOGEN-ACTIVATOR; SERUM ADIPONECTIN; METABOLIC SYNDROME; RESISTIN LEVELS; CELLS; ESTROGEN; RELEASE; FAT;
D O I
10.1016/j.canep.2010.05.014
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
Introduction: Obesity is a well-established risk factor for postmenopausal breast cancer, but mechanisms underlying the association are unclear. Adipocyte-derived, cytokine-like adipokines have been suggested as contributory factors. To evaluate their association with breast cancer risk factors and breast cancer risk, we conducted a nested case-control study of 234 postmenopausal breast cancer cases and 234 controls in a cohort of U.S. women with prospectively-collected serum samples obtained in the mid 1970s and followed for up to 25 years. Methods: Adiponectin, absolute plasminogen activator inhibitor-1 (aPAI-1), and resistin were measured by a multiplex immunoassay. Sex hormones were available for 67 cases and 67 controls. Results: Among controls, we found that lower levels of adiponectin and higher levels of aPAI-1 were correlated with increasing levels of estradiol (Spearman r = 0.26, p-value = 0.033; r = 0.42, p = 0.0003), decreasing levels of sex hormone binding globulin (r = 0.38, p = 0.0013; r = 0.32, p = 0.0076), and increasing body mass index (BMI) (r = 0.31, p = <0.0001: r = 0.39, p = <0.0001). Hormones were not associated with resistin. Among the relatively small percentage of women using postmenopausal hormones at the time of blood collection (13.7%), aPAI-1 levels were higher than in non-users (p = 0.0054). Breast cancer risk was not associated with circulating levels of adiponectin (age-adjusted p for linear trend = 0.43), aPAI-1 (p = 0.78), or resistin (p = 0.91). The association was not confounded by BMI, parity, age at first full-term birth, age at menopause, current postmenopausal hormone use, and circulating sex steroid hormones. Furthermore, adipokine associations were not modified by BMI (p > 0.05). The lack of association with risk may be due to measurement error of the laboratory assays. Discussion: lower levels of adiponectin and higher levels of aPAI-1 measured in prospectively-collected serum from postmenopausal women were associated with increasing BMI but not breast cancer risk. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码:580 / 586
页数:7
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