In vivo administration of doxazosin to male rats modify both prostatic IRAP activity and OT levels. Because there is now evidence that OT plays a physiological role in the regulation of growth and muscular contractility within the gland, more attention should be paid to IRAP activity, which could represent a new target for the regulation of the functions of OT under physiological or pathological conditions such as BPH and prostate cancer.
The hypothalamus-pituitary-adrenal axis (HPA) participates in the maintenance of cardiovascular functions and in the control of blood pressure. By other hand, it is known that blood pressure regulation and HPA activity are affected by sex hormones. The aim of the present work is to analyze the influence of estradiol and progesterone on renin-angiotensin system (RAS)-regulating aminopeptidase A, aminopeptidase B and aminopeptidase N activities and vasopressin-degrading activity in the HPA axis of ovariectomized mice and ovariectomized mice treated subscutaneously with different doses of estradiol and progesterone. Our data suggest that in female mice, estradiol and progesterone influence RAS-regulating and vasopressin-degrading activities at different levels of the HPA axis.
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