Abstract
A study was conducted to assess the effect of a new pyrimidine derivative PIR-20 (50 mg/kg) on the development of cognitive deficits in the conditions of global cerebral ischemia in rats. The study was performed on 40 male Wistar rats weighing 200–220 g, divided into 4 groups of 10 individuals. False-operated rats and negative control animals were injected with a suspension of purified water and tween-80, the third group of animals received Cavinton (3,2 mg/kg), the fourth — PIR-20 (50 mg/kg). All test subjects were injected intraperitoneally for ten days prior to surgery. The number of dives increased to 100%, while the decision-making time decreased by 55,2% (p<0,05) in the extrapolation escape test against the background of the PIR-20 compound administration. 75% of the animals treated with PIR-20 did not re-visit the dark compartment, and the time of entering the dark chamber increased by 172,9% (p<0,05) as compared to the group of negative control rats in the test of passive avoidance of the avesir environment. It was confirmed that the studied compound PIR-20 contributes to the improvement of cognitive and mnestic functions, which is confirmed by the results of tests of passive and active aversive environment avoidance. The obtained effect exceeded the results of the control group and the reference drug Cavinton.
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