Journal Article

Prospective Study of Antioxidant Micronutrients in the Blood and the Risk of Developing Prostate Cancer

Han-Yao Huang, Anthony J. Alberg, Edward P. Norkus, Sandra C. Hoffman, George W. Comstock and Kathy J. Helzlsouer

in American Journal of Epidemiology

Published on behalf of Johns Hopkins Bloomberg School of Public Health

Volume 157, issue 4, pages 335-344
Published in print February 2003 | ISSN: 0002-9262
Published online February 2003 | e-ISSN: 1476-6256 | DOI: http://dx.doi.org/10.1093/aje/kwf210
Prospective Study of Antioxidant Micronutrients in the Blood and the Risk of Developing Prostate Cancer

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Antioxidant micronutrients may have chemopreventive effects. The authors examined the associations between prediagnostic blood levels of micronutrients and prostate cancer risk in two nested case-control studies of 9,804 and 10,456 male residents of Washington County, Maryland, who donated blood in 1974 (CLUE I) and 1989 (CLUE II), respectively. Until 1996, 182 men for whom adequate serum remained for assays in the CLUE I cohort and 142 men in the CLUE II cohort developed prostate cancer. Each case was matched with two controls by age, gender, race, and date of blood donation. In both cohorts, cases and controls had similar concentrations of α-carotene, β-carotene, total carotene, β-cryptoxanthin, lutein, lycopene, retinol, and ascorbic acid; serum α-tocopherol was weakly associated with prostate cancer risk. Higher retinyl palmitate concentrations were associated with a lower risk in CLUE I but not CLUE II. In CLUE I, cases had lower concentrations of γ-tocopherol than did controls (p = 0.02), but no dose-response trend was observed. A strong inverse association between γ-tocopherol and prostate cancer risk was observed in CLUE II. Findings do not replicate previous reports of a protective association between lycopene and prostate cancer, but they suggest potential chemopreventive effects of γ-tocopherol on prostate cancer.

Keywords: antioxidants; ascorbic acid; prostatic neoplasms; vitamin A; vitamin E; Abbreviation: PSA, prostate-specific antigen.

Journal Article.  6956 words. 

Subjects: Public Health and Epidemiology

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