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Effects of estradiol on aldosterone secretion in ovariectomized rats
Author(s) -
Kau MeiMei,
Lo MingJae,
Tsai ShiowChwen,
Chen JiannJong,
Lu ChienChen,
Lin Ho,
Wang ShyiWu,
Wang Paulus S.
Publication year - 1999
Publication title -
journal of cellular biochemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.028
H-Index - 165
eISSN - 1097-4644
pISSN - 0730-2312
DOI - 10.1002/(sici)1097-4644(19990401)73:1<137::aid-jcb15>3.0.co;2-7
Subject(s) - aldosterone , medicine , endocrinology , zona glomerulosa , corticosterone , ovariectomized rat , forskolin , mineralocorticoid , chemistry , adrenocorticotropic hormone , secretion , adrenal cortex , hormone , angiotensin ii , biology , stimulation , blood pressure
The effects and action mechanisms of estradiol on aldosterone secretion in female rats were studied. Replacement of estradiol benzoate (EB) increased the levels of plasma estradiol and aldosterone in ovariectomized (Ovx) rats. The aldosterone release from zona glomerulosa (ZG) cells was higher in EB‐treated rats than in oil‐treated animals. EB treatment potentiated the responses of aldosterone release to adrenocorticotropic hormone (ACTH), forskolin (FSK), and 8‐bromoadenosine 3′, 5′‐cyclic monophosphate (8‐Br‐cAMP). Administration of EB in vivo did not alter cAMP production in response to ACTH or FSK. Although angiotensin II (Ang II) increased aldosterone secretion by rat ZG cells, the stimulatory effect of Ang II on the release of aldosterone was not altered by EB treatment. The conversions of [ 3 H]‐deoxycorticosterone to [ 3 H]‐corticosterone and [ 3 H]‐corticosterone to [ 3 H]‐aldosterone in EB‐treated groups were greater than those in the oil‐treated group. These results suggest that estradiol increases aldosterone secretion in part through the mechanisms involving the activation of the post‐cAMP pathway, 11β‐hydroxylase and aldosterone synthase activity. J. Cell. Biochem. 73:137–144, 1999. © 1999 Wiley‐Liss, Inc.