Abstract
The effect of tripeptide Gly-Pro-Hyp on the central nervous system was studied. The peptide Gly-Pro-Hyp is a main component of the mixture of collagen type I degradation products obtained by 6-h digestion with bacterial collagenase. The investigated peptide in the doses 1 microgram, 2 micrograms, and 5 micrograms significantly reduces the psychomotor activity of animals, intensifies haloperidol-induced catalepsy and enhances stereotypy behaviour after apomorphine administration. The central activity of Gly-Pro-Hyp is similar to the action of collagen degradation products mixture. This suggests that this peptide may be the active substance responsible for the effects of degradation products of collagen type I.
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