Influence of neuropeptides on psychoemotional state under conditions of “social” stress

Objective: experimental study of the influence of neuropeptides on the psychoemotional state of white male rats exposed to “social” stress.

Materials and methods. A study of the psychomodulatory effect of neuropeptides (Semax, Selank, ACTH(6-9)-Pro-Gly-Pro, Pro-Gly-Pro, Pro-Gly-Pro-Leu) under conditions of experimental “social” stress was performed on white non-linear male rats. The studied neuropeptides were synthesized at the Institute of Molecular Genetics of the National Research Center “Kurchatov Institute”. The study of the effect of neuropeptides on the behavior of male white rats was carried out on the model of “social” stress, the methodological reception of which is the constant residence of animals under conditions of sensory contact in order to form aggressive and submissive types of behavior. The effect of neuropeptides on the psychoemotional state of white rats under conditions of “social” stress was assessed on the basis of studying the behavior of animals in the tests “Elevated сruciform maze” and “Porsolt”. The “Elevated cruciform maze” test makes it possible to study the behavior of animals under conditions of variable stress (with a free choice of comfortable conditions) and allows assessing: the level of anxiety of the animal; symptoms of neurological deficiency. The test “Porsolt” provides an assessment of changes in the motor activity of animals and allows you to study the severity of the depressive state.

Results. It was found that the effect of “social” stress on the behavior of male rats contributed to an increase in situational anxiety and the appearance of depressive-like behavioral reactions. It has been proven that the introduction of neuropeptides (Semax, Selank, ACTH(6-9)-Pro-Gly-Pro, Pro-Gly-Pro, Pro-Gly-Pro-Leu) helps to reduce increased anxiety in animals, both with aggressive and submissive types of behavior under conditions of “social” stress thereby providing a psychomodulatory effect.

Conclusion. This study expands the understanding of the regulatory role of neuropeptides in the body, demonstrating the possibility of their influence on the psychoemotional state.

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