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    Phytoestrogen exposure, polymorphisms in COMT, CYP19, ESR1, and SHBG genes, and their associations with prostate cancer risk.

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    Authors
    Low, Yen-Ling
    Taylor, James I.
    Grace, Philip B.
    Mulligan, Angela A.
    Welch, Ailsa A.
    Scollen, Serena
    Dunning, Alison M.
    Luben, Robert N.
    Khaw, Kay-Tee
    Day, Nick E.
    Wareham, Nick J.
    Bingham, Sheila A.
    Issue Date
    2006
    
    Metadata
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    Abstract
    Prospective phytoestrogen exposure was assessed using both biomarkers and estimates of intake in 89 British men recruited into the Norfolk arm of the European Prospective Investigation into Cancer and Nutrition study, men who subsequently developed prostate cancer. Results were compared with those from 178 healthy men matched by age and date of recruitment. Levels of seven phytoestrogens (daidzein, genistein, glycitein, O-desmethylangolensin, equol, enterodiol, and enterolactone) were measured in spot urine and serum samples. Five single-nucleotide polymorphisms in COMT, CYP19, ESR1, and SHBG genes were genotyped. Urinary levels of all phytoestrogens correlated strongly with serum levels. Correlation coefficients ranged from 0.63 (glycitein) to 0.88 (daidzein) (P < 0.001). Urinary and serum levels correlated significantly with isoflavone intake assessed from food diaries (R = 0.15-0.20; P < 0.05) but not with that from a food-frequency questionnaire. Odds ratios for phytoestrogen exposure, as assessed using the four methods, were not significantly associated with prostate cancer risk (P = 0.15-0.94). Men with the CC genotype for the ESRI PvuII polymorphism had significantly higher risk for prostate cancer compared with men with the TT genotype [adjusted odds ratio = 4.65 (1.60-13.49); P = 0.005]. Our results utilizing a combined prospective exposure provide no evidence that phytoestrogens alter prostate cancer risk in British men, whereas the C allele for the PvuII polymorphism may be associated with increased risk.
    Citation
    Nutr Cancer 2006, 56 (1):31-39.
    Journal
    Nutrition and cancer
    URI
    http://hdl.handle.net/10146/51433
    DOI
    10.1207/s15327914nc5601_5
    PubMed ID
    17176215
    Additional Links
    http://www.informaworld.com/smpp/content~content=a785829405~db=all~order=page
    Type
    Article
    Language
    en
    Description
    Biomarkers of individual susceptibility: field studiesBiomarker: single-nucleotide polymorphisms in COMT, CYP19, ESR1, and SHBG genesEffect studied: cancer riskTissue/biological material/sample size: urine, bloodMethod of analysis: genotypingStudy design: nested case-control studyStudy size: 89 cases and 178 controlsImpact on outcome (including dose-response): Odds ratios for phytoestrogen exposure, as assessed using the four methods, were not significantly associated with prostate cancer risk (P = 0.15-0.94). Men with the CC genotype for the ESRI PvuII polymorphism had significantly higher risk for prostate cancer compared with men with the TT genotype [adjusted odds ratio = 4.65 (1.60-13.49); P = 0.005].
    ISSN
    0163-5581
    ae974a485f413a2113503eed53cd6c53
    10.1207/s15327914nc5601_5
    Scopus Count
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