Effects of acute stress on the day of proestrus on sexual behavior and ovulation in female rats: participation of the angiotensinergic system.

摘要: Physical or emotional stress can affect the female reproductive physiology and angiotensin II (Ang II) is a hormone that participates in response also control of hormones. The present study aimed at evaluating effects acute morning afternoon proestrus on sexual behavior ovulation participation Ang stress-induced effects. Female rats with regular estrous cycles were used. Several different protocols tested proestrus: restraint 10 min; 1 h ether stress, respectively. was evaluated by injecting receptor antagonists (losartan PD123319) 15 min before stress. lordosis quotient recorded number oocytes counted. Plasma levels luteinizing hormone, progesterone, prolactin corticosterone measured. All types induced reduction oocytes. Restraint (1 h) significant quotient. Peripheral central losartan, but not PD123319, injections partly reverted proestrus. Acute reduced progesterone surges later same day. In conclusion, day physiology. Moreover, angiotensinergic system, through AT(1) receptors,