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Longitudinal Associations of the Endocrine Environment on Fat Partitioning in Postmenopausal Women
Author(s) -
Goss Amy M.,
Darnell Betty E.,
Brown Marian A.,
Oster Robert A.,
Gower Barbara A.
Publication year - 2012
Publication title -
obesity
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.438
H-Index - 199
eISSN - 1930-739X
pISSN - 1930-7381
DOI - 10.1038/oby.2011.362
Subject(s) - estrone , medicine , endocrinology , dehydroepiandrosterone sulfate , sex hormone binding globulin , testosterone (patch) , adipose tissue , estrogen , estrone sulfate , hormone , androgen
Among postmenopausal women, declining estrogen may facilitate fat partitioning from the periphery to the intra‐abdominal space. Furthermore, it has been suggested that excess androgens contribute to a central fat distribution pattern in women. The objective of this longitudinal study was to identify independent associations of the hormone milieu with fat distribution in postmenopausal women. Fifty‐three healthy postmenopausal women, either using or not using hormone replacement therapy (HRT) were evaluated at baseline and 2 years. The main outcomes were intra‐abdominal adipose tissue (IAAT), subcutaneous abdominal adipose tissue, and total thigh fat analyzed by computed tomography scanning and leg fat and total body fat mass measured by dual‐energy X‐ray absorptiometry. Serum estradiol, estrone, estrone sulfate, total testosterone, free testosterone, androstenedione, dehydroepiandrosterone sulfate), sex hormone‐binding globulin (SHBG), and cortisol were assessed. On average, in all women combined, IAAT increased by 10% (10.5 cm 2 ) over 2 years ( P < 0.05). Among HRT users, estradiol was inversely associated with, and estrone was positively associated with, 2‐year gain in IAAT. Among HRT nonusers, free testosterone was inversely associated with, and SHBG was positively associated with, 2‐year gain in IAAT. These results suggest that in postmenopausal women using HRT, greater circulating estradiol may play an integral role in limiting lipid deposition to the intra‐abdominal cavity, a depot associated with metabolically detrimental attributes. However, a high proportion of weak estrogens may promote fat partitioning to the intra‐abdominal cavity over time. Furthermore, among postmenopausal women not using HRT, greater circulating free testosterone may limit IAAT accrual.