Abstract
Introduction. Thyroid disease is currently the most common among endocrine pathology. Hyperproduction of thyroid hormones is accompanied by stimulation of humoral reactions, contributing to the development of immune-mediated pathology under certain conditions, which actualizes the need to develop means for correcting neuroimmunoendocrine processes. Gliproline compounds analogous to neuropeptide protein molecules, among which are Thr-Lys-Pro-Arg-Pro-Gly-Pro and Pro-Gly-Pro, can be considered as such agents. The aim of the study. The aim of the study was to study the immunotropic properties of gliproline compounds Thr-Lys-Pro-Arg-Pro-Gly-Pro and Pro-Gly-Pro under experimental hyperthyroidism. Material and methods. The immunotropic properties of the gliproline compounds Thr-Lys-Pro-Arg-Pro-Gly-Pro and Pro-Gly-Pro were studied in white nonlinear male rats. Hyperthyroid status in animals was modeled by intragastric administration of L-thyroxine sodium salt pentahydrate («Sigma»; USA) at 150 μg/kg for 21 days. Laboratory animals were divided into groups (n=10): control group – intact animals (control); animals treated with L-thyroxine sodium salt pentahydrate (hyperthyroidism); rats receiving Thr-Lys-Pro-Arg-Pro-Gly-Pro (selanc) and rats receiving Pro-Gly-Pro intraperitoneally daily for 21 days at doses of 87 and 33 μg/kg/day. Results. The obtained results indicate the presence in gliproline compounds Thr-Lys-Pro-Arg-Pro-Gly-Pro and Pro-Gly-Pro of immune correcting activity manifested under the conditions of experimental hyperthyroidism, with the greatest impact on the humoral unit of immunity, which is confirmed by the presence of statistically significant changes in the cellular parameters of the spleen and titer antierythrocytic antibodies in a direct hemagglutination reaction. Conclusion. Thus, the study of the immunotropic properties of gliproline peptide compounds under experimental hyperthyroidism established the presence of immune-correcting activity in Thr-Lys-Pro-Arg-Pro-Gly-Pro and Pro-Gly-Pro substances.
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