Published in:
Open Access
01-12-2015 | Research
Adolescent endogenous sex hormones and breast density in early adulthood
Authors:
Seungyoun Jung, Brian L. Egleston, D. Walt Chandler, Linda Van Horn, Nola M. Hylton, Catherine C. Klifa, Norman L. Lasser, Erin S. LeBlanc, Kenneth Paris, John A. Shepherd, Linda G. Snetselaar, Frank Z. Stanczyk, Victor J. Stevens, Joanne F. Dorgan
Published in:
Breast Cancer Research
|
Issue 1/2015
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Abstract
Introduction
During adolescence the breasts undergo rapid growth and development under the influence of sex hormones. Although the hormonal etiology of breast cancer is hypothesized, it remains unknown whether adolescent sex hormones are associated with adult breast density, which is a strong risk factor for breast cancer.
Methods
Percentage of dense breast volume (%DBV) was measured in 2006 by magnetic resonance imaging in 177 women aged 25–29 years who had participated in the Dietary Intervention Study in Children from 1988 to 1997. They had sex hormones and sex hormone-binding globulin (SHBG) measured in serum collected on one to five occasions between 8 and 17 years of age. Multivariable linear mixed-effect regression models were used to evaluate the associations of adolescent sex hormones and SHBG with %DBV.
Results
Dehydroepiandrosterone sulfate (DHEAS) and SHBG measured in premenarche serum samples were significantly positively associated with %DBV (all P
trend ≤0.03) but not when measured in postmenarche samples (all P
trend ≥0.42). The multivariable geometric mean of %DBV across quartiles of premenarcheal DHEAS and SHBG increased from 16.7 to 22.1 % and from 14.1 to 24.3 %, respectively. Estrogens, progesterone, androstenedione, and testosterone in pre- or postmenarche serum samples were not associated with %DBV (all P
trend ≥0.16).
Conclusions
Our results suggest that higher premenarcheal DHEAS and SHBG levels are associated with higher %DBV in young women. Whether this association translates into an increased risk of breast cancer later in life is currently unknown.
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