Adipose Levels of Dioxins and Risk of Breast Cancer

Objective: Our objective was to evaluate the breast cancer risk associated with body burden levels of polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs). Methods: We conducted a hospital-based case-control study among 79 women diagnosed with invasive breast cancer an...

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Bibliographic Details
Published in:Cancer causes & control 2005-06, Vol.16 (5), p.525-535
Main Authors: Reynolds, Peggy, Hurley, Susan E., Petreas, Myrto, Goldberg, Debbie E., Smith, Daniel, Gilliss, Debra, Mahoney, M. Ellen, Jeffrey, Stefanie S.
Format: Article
Language:English
Subjects:
Adipose Tissue - metabolism
Adipose tissues
Adult
Body burden
Breast cancer
Breast Neoplasms - metabolism
Breasts
Case-Control Studies
Chemical hazards
Congeners
Continental Population Groups
Dioxins
Dioxins - metabolism
Female
Gas Chromatography-Mass Spectrometry
Humans
Lipids
Logistic Models
Middle Aged
Mortality
Polychlorinated biphenyls
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Summary:Objective: Our objective was to evaluate the breast cancer risk associated with body burden levels of polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs). Methods: We conducted a hospital-based case-control study among 79 women diagnosed with invasive breast cancer and 52 controls diagnosed with benign breast conditions. We collected breast adipose tissue and analyzed it for all 17 2,3,7,8-substituted PCDD/PCDFs. We used unconditional logistic regression to calculate age- and race-adjusted exposure-specific odds ratios (ORs) and 95% confidence intervals (CI) for each individual PCDD/PCDF congener as well as for the summary measures (I-TEQ, Adj-TEQ). Results: Dioxin levels were consistent with reports from other small, contemporary studies of body burdens in the U.S. None of the odds ratios for any of the congeners or summary measures differed significantly from one. Especially for the PCDF congeners, point estimates tended to be below one. One notable exception was octachlorodibenzo-p-dioxin (OCDD), for which the odds ratio for the second and third tertiles appeared modestly elevated (OR = 1.22, 95% CI: 0.47-3.16 and OR = 1.62, 95% CI: 0.64-4.12, respectively), though the test for trend was not significant (p = 0.36). Conclusion: Breast cancer risk was not associated with adipose levels of PCDD/PCDFs. More study is suggested among women of color who may have higher body burden levels of these compounds.
ISSN:0957-5243
1573-7225
DOI:10.1007/s10552-004-7840-5