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    Sex steroid metabolism polymorphisms and mammographic density in pre- and early perimenopausal women

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    Authors
    Crandall, Carolyn J.
    Sehl, Mary E.
    Crawford, Sybil L.
    Gold, Ellen B.
    Habel, Laurel A.
    Butler, Lesley M.
    Sowers, Mary Fran R.
    Greendale, Gail A.
    Sinsheimer, Janet S.
    UMass Chan Affiliations
    Department of Medicine, Division of Preventive and Behavioral Medicine
    Document Type
    Journal Article
    Publication Date
    2009-07-01
    Keywords
    Breast
    Gonadal Steroid Hormones
    Polymorphism, Single Nucleotide
    Perimenopause
    Life Sciences
    Medicine and Health Sciences
    Women's Studies
    
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    Link to Full Text
    http://dx.doi.org/10.1186/bcr2340
    Abstract
    INTRODUCTION : We examined the association between mammographic density and single-nucleotide polymorphisms (SNPs) in genes encoding CYP1A1, CYP1B1, aromatase, 17beta-HSD, ESR1, and ESR2 in pre- and early perimenopausal white, African-American, Chinese, and Japanese women. METHODS : The Study of Women's Health Across the Nation is a longitudinal community-based cohort study. We analyzed data from 451 pre- and early perimenopausal participants of the ancillary SWAN Mammographic Density study for whom we had complete information regarding mammographic density, genotypes, and covariates. With multivariate linear regression, we examined the relation between percentage mammographic breast density (outcome) and each SNP (primary predictor), adjusting for age, race/ethnicity, parity, cigarette smoking, and body mass index (BMI). RESULTS : After multivariate adjustment, the CYP1B1 rs162555 CC genotype was associated with a 9.4% higher mammographic density than the TC/TT genotype (P = 0.04). The CYP19A1 rs936306 TT genotype was associated with 6.2% lower mammographic density than the TC/CC genotype (P = 0.02). The positive association between CYP1A1 rs2606345 and mammographic density was significantly stronger among participants with BMI greater than 30 kg/m2 than among those with BMI less than 25 kg/m2 (Pinteraction = 0.05). Among white participants, the ESR1 rs2234693 CC genotype was associated with a 7.0% higher mammographic density than the CT/TT genotype (P = 0.01). CONCLUSIONS : SNPs in certain genes encoding sex steroid metabolism enzymes and ESRs were associated with mammographic density. Because the encoded enzymes and ESR1 are expressed in breast tissue, these SNPs may influence breast cancer risk by altering mammographic density.
    Source

    Breast Cancer Res. 2009;11(4):R51. Epub 2009 Jul 27. Link to article on publisher's site

    DOI
    10.1186/bcr2340
    Permanent Link to this Item
    http://hdl.handle.net/20.500.14038/50924
    PubMed ID
    19630952
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    Rights
    © Crandall; licensee BioMed Central Ltd. 2009 This article is published under license to BioMed Central Ltd. This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium provided the original work is properly cited.
    ae974a485f413a2113503eed53cd6c53
    10.1186/bcr2340
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