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  • Title: The modulating role of obesity and 17 beta-estradiol (E2) on bound and unbound E2 and adrenal androgens in oophorectomized women.
    Author: Lobo RA, March CM, Goebelsmann U, Mishell DR.
    Journal: J Clin Endocrinol Metab; 1982 Feb; 54(2):320-4. PubMed ID: 6459339.
    Abstract:
    17 beta-Estradiol (E2) pellet replacement therapy for oophorectomized women has been shown to be safe and effective. Some investigators have advocated the addition of testosterone (T) pellets for oophorectomized women. This study was carried out to measure the level of androgens in oophorectomized women with and without E2 pellets. The possible modulating role of E2 upon adrenal androgens was investigated as well as the effects of obesity on bound and unbound serum levels of E2 and T. Seven obese patients and eight nonobese normal patients with E2 pellets were compared to nine oophorectomized age- and weight-matched control women not receiving estrogen. Obese patients had higher levels of androstenediol (Adiol) and androstenedione (A) than nonobese patients, yet compared to oophorectomized controls, nonobese patients had higher levels of dehydroepiandrosterone sulfate (DHEA-S) and Adiol. As a group, patients with E2 pellets had higher levels of DHEA-S, Adiol A, and unbound T compared to oophorectomized controls, and their Adiol and total and unbound T levels were similar to those of premenopausal females. Obese patients had lower levels of total E2, yet a higher percentage of unbound E2, resulting in unbound E2 levels which were similar to those of the nonobese women. Unbound T was higher in obese patients compared to the nonobese women and oophorectomized controls. In conclusion, these data suggest that 1) there may be a modulating role of E2 on adrenal androgens exemplified by an increased serum level of delta 5-3 beta-ol androgens in women with E2 pellets, 2) supplemental T implants for oophorectomized women may not be necessary, and 3) obese women with pellets have higher levels of Adiol, A, and unbound T then nonobese women and therefore have a higher ratio of androgen to estrogen.
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