NEUROPEPTIDES EFFECTS ON RAT ESTROUS CYCLE DISORDERS CAUSED BY MORPHINE

The aim of the study was to evaluate the influence of the Delta sleep-inducing peptide (DSIP) or the analogue of the adrenocorticotropin4-10 fragment (FACTH) on changes in the estrous cycle of rats caused by long-term administration of morphine. It has been found that the intranasal administration of DSIP or FACTH for 14 days did not lead to significant changes in the estrous cycle in mature female inbred rats. The introduction of morphine at a dose of 60 mg/kg for 60 days was accompanied by a statistically significant change in the duration and structure of the estrous cycle in experimental animals: a decrease in the duration of the estrus period to 1,50 ± 0,17 days and an increase in interintegration to 8,30 ± 0,80 days, as well as the total duration of the estrous cycle up to 9,60 ± 0,65 days. In turn, the use of DSIP and FACTH for 14 days after the administration of morphine at a dose of 60 mg/kg for 60 days led to the normalization of the structure and duration of the estrous cycle in mature female inbred rats.