Modified Effect of Peptide Preparations on Spontaneous Motor Activity in Male Rats under the Conditions of Light Desynchronosis

This study examined the effect of peptide extracts from the epiphysis-pituitary gland of Reindeer (Rangifer tarandus) and a delta sleep-inducing peptide, simulating a modified release of drugs, on the spontaneous motor activity of male rats under the conditions of light desynchronosis. The study revealed changes in spontaneous motor activity under the influence of extracts of a peptide nature and a delta sleep-inducing peptide under the following polar light regimes. Under the conditions of constant lighting and constant darkness, an increase and a decrease in activity was observed, respectively. Under normal lighting, peptide extracts showed increased efficacy. This method of pharmacological adjustment of the body’s circadian oscillators using modified-release peptides can be used to develop a scheme for correcting light desynchronosis.