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    Keywords: CANCER ; BLOOD ; EXPOSURE ; RISK ; BINDING ; ASSOCIATION ; BREAST ; breast cancer ; BREAST-CANCER ; hormone ; HEALTH ; WOMEN ; DIETARY ; UNITED-STATES ; ALCOHOL ; ALCOHOL-CONSUMPTION ; CONSUMPTION ; EPIC ; nutrition ; QUESTIONNAIRE ; IMMUNOASSAYS ; immunoassay ; LIFE-STYLE FACTORS ; dehydroepiandrosterone ; POSTMENOPAUSAL WOMEN ; SERUM ; ONCOLOGY ; RE ; EPIC PROJECT ; LEVEL ; methods ; PREMENOPAUSAL WOMEN ; SERUM-LEVELS ; alcohol consumption ; PREMENOPAUSAL ; prospective ; BINDING GLOBULIN ; CIRCULATING LEVELS ; intake ; steroids ; HORMONE CONCENTRATIONS ; alcohol intake ; ESTRADIOL LEVELS ; post-menopausal women ; pre-menopausal ; SERUM HORMONE CONCENTRATIONS ; sex steroids
    Abstract: Objective Women with a moderate intake of alcohol have higher concentrations of sex steroids in serum, and higher risk of developing breast cancer, compared to non-drinkers. In the present study, we investigate the relationships between alcohol consumption and serum levels of sex steroids and sex-hormone binding globulin (SHBG) in 790 pre- and 1,291 post-menopausal women, who were part of the European Prospective Investigation into Cancer and Nutrition (EPIC). Methods Serum levels of testosterone (T), androstenedione (Delta(4)), dehydroepiandrosterone sulphate (DHEAS), estrone (E-1), estradiol (E-2) and SHBG were measured by direct immunoassays. Free T (fT) and free E-2 (fE(2)) were calculated according to mass action laws. Current alcohol intake exposure to alcohol was assessed from dietary questionnaires. Results Pre-menopausal women who consumed more than 25 g/day of alcohol had about 30% higher DHEAS, T and fT, 20% higher Delta(4) and about 40% higher E-1, concentrations compared to women who were non-consumers. E-2, fE(2) and SHBG concentrations showed no association with current alcohol intake. In post-menopausal women, DHEAS, fT, T, Delta(4), and E-1 concentrations were between 10% and 20% higher in women who consumed more than 25 g/day of alcohol compared to non-consumers. E-2 or fE(2) were not associated with alcohol intake at all. SHBG levels were about 15% lower in alcohol consumers compared to non-consumers. Conclusion This study supports the hypothesis of an influence of alcohol intake on sex hormone concentrations in blood
    Type of Publication: Journal article published
    PubMed ID: 16933054
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