OBJECTIVE: The objective of this study was to distinguish the role of specific estrogen receptors (ERs), ERalpha and ERbeta, on body weight regulation using a rat model of weight gain subsequent to menopause. STUDY DESIGN: Ovariectomized rats were utilized as the animal model to simulate the postmenopause weight gain. The rats were ovariectomized and subcutaneously injected daily with vehicle, estradiol-17beta (E2), propylpyrazoletriol (PPT; ERalpha agonist) and diarylpropionitrile (DPN; ERbeta agonist). To further control for the possible effect of estrogen secreted from adrenals, a second experiment was conducted during which the rats were adrenalectomized and ovariectomized. RESULTS: Ovariectomy significantly increased (P < .05) body weight, whereas treatment of ovariectomized rats with E2 and PPT, but DPN decreased (P < .05) body weight. The results from the second study with ovariectomized/adrenalectomized rats were consistent with the first experiment. CONCLUSION: These results suggest that the activation of ERalpha is important in regulating body weight.
OBJECTIVE: The objective of this study was to distinguish the role of specific estrogen receptors (ERs), ERalpha and ERbeta, on body weight regulation using a rat model of weight gain subsequent to menopause. STUDY DESIGN: Ovariectomized rats were utilized as the animal model to simulate the postmenopause weight gain. The rats were ovariectomized and subcutaneously injected daily with vehicle, estradiol-17beta (E2), propylpyrazoletriol (PPT; ERalpha agonist) and diarylpropionitrile (DPN; ERbeta agonist). To further control for the possible effect of estrogen secreted from adrenals, a second experiment was conducted during which the rats were adrenalectomized and ovariectomized. RESULTS: Ovariectomy significantly increased (P < .05) body weight, whereas treatment of ovariectomized rats with E2 and PPT, but DPN decreased (P < .05) body weight. The results from the second study with ovariectomized/adrenalectomized rats were consistent with the first experiment. CONCLUSION: These results suggest that the activation of ERalpha is important in regulating body weight.
Authors: Ashley L Russell; Jamie Moran Grimes; Danette F Cruthirds; Joanna Westerfield; Lawren Wooten; Margaret Keil; Michael J Weiser; Michael R Landauer; Robert J Handa; T John Wu; Darwin O Larco Journal: Horm Metab Res Date: 2017-05-08 Impact factor: 2.936
Authors: Ronald W Irwin; Jia Yao; Syeda S Ahmed; Ryan T Hamilton; Enrique Cadenas; Roberta Diaz Brinton Journal: Endocrinology Date: 2010-12-15 Impact factor: 4.736