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- aggregation classification "A1".
- aggregation creator B381718.
- aggregation creator B381719.
- aggregation creator B381720.
- aggregation creator B381721.
- aggregation creator person.
- aggregation creator person.
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- aggregation date "2010".
- aggregation format "application/pdf".
- aggregation hasFormat 980671.bibtex.
- aggregation hasFormat 980671.csv.
- aggregation hasFormat 980671.dc.
- aggregation hasFormat 980671.didl.
- aggregation hasFormat 980671.doc.
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- aggregation hasFormat 980671.txt.
- aggregation hasFormat 980671.xls.
- aggregation hasFormat 980671.yaml.
- aggregation isPartOf urn:issn:0002-9165.
- aggregation language "eng".
- aggregation rights "I have transferred the copyright for this publication to the publisher".
- aggregation subject "Medicine and Health Sciences".
- aggregation title "Disposition of soy isoflavones in normal human breast tissue".
- aggregation abstract "Background: Despite decades of research on the relation between soy and breast cancer, questions regarding the absorption, metabolism, and distribution of isoflavones in breast tissue largely remain unanswered. Objective: We evaluated the potential health effects of isoflavone consumption on normal breast tissue; isoflavone concentrations, metabolites, and biodistribution were investigated and compared with 17 beta-estradiol exposure. Design: In this dietary intervention study, healthy women were randomly allocated to a soy milk (n = 11; 16.98-mg genistein and 5.40-mg daidzein aglycone equivalents per dose), soy supplement (n = 10; 5.27-mg genistein and 17.56-mg daidzein aglycone equivalents per dose), or control (n = 10) group. After a run-in period >= 4 d, 3 doses of soy milk or soy supplements were taken daily for 5 d before an esthetic breast reduction. Blood and breast biopsies were collected during surgery and analyzed with liquid chromatography-tandem mass spectrometry. Results: After soy administration, genistein and total daidzein concentrations, which were expressed as aglycone equivalents, ranged from 135.1 to 2831 nmol/L and 105.1 to 1397 nmol/L, respectively, in hydrolyzed serum and from 92.33 to 493.8 pmol/g and 22.15 to 770.8 pmol/g, respectively, in hydrolyzed breast tissue. The major metabolites identified in nonhydrolyzed samples were genistein-7-O-glucuronide and daidzein-7-O-glucuronide, with an overall glucuronidation of 98%. Total isoflavones showed a breast adipose/glandular tissue distribution of 40: 60, and their mean (+/- SEM) derived 17 beta-estradiol equivalents toward estrogen receptor beta were 21 +/- 4-fold and 40 +/- 10-fold higher than the 17 beta-estradiol concentrations in adipose (0.283 +/- 6 0.089 pmol/g, P < 0.001) and glandular (0.246 +/- 0.091 pmol/g, P = 0.001) fractions, respectively. Conclusion: After intake of soy milk and soy supplements, isoflavones reach exposure levels in breast tissue at which potential health effects may occur.".
- aggregation authorList BK689717.
- aggregation endPage "984".
- aggregation issue "4".
- aggregation startPage "976".
- aggregation volume "91".
- aggregation aggregates 980686.
- aggregation isDescribedBy 980671.
- aggregation similarTo ajcn.2009.28854.
- aggregation similarTo LU-980671.