Morphofunctional State of the Large Intestine in Rats under Conditions of Restraint Stress and Administration of Peptide ACTH(4-7)-PGP (Semax)

We studied the effect of intraperitoneal administration ACTH(4-7)-PGP in doses of 5, 50, 150, and 450 μg/kg to Wistar male rats 12-15 min before modeling restraint stress on the morphofunctional state of the colon. In rats exposed to restraint stress, signs of atrophy and inflammatory reaction in the colon wall, changes in functional activity and number of mast cells, and increased serum level of corticosterone were observed. Administration of the peptide led to a decrease in corticosterone concentration, alleviated stress-induced pathomorphological changes, and promoted adaptation of the intestinal wall to stress. The positive effects of ACTH(4-7)-PGP can be determined by multifunctional nature of the physiological and pharmacological effects of the neuropeptide.

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Correspondence to I. I. Bobyntsev.

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Translated from Byulleten’ Eksperimental’noi Biologii i Meditsiny, Vol. 170, No. 9, pp. 383-387, September, 2020

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Svishcheva, M.V., Mishina, Y.S., Medvedeva, O.A. et al. Morphofunctional State of the Large Intestine in Rats under Conditions of Restraint Stress and Administration of Peptide ACTH(4-7)-PGP (Semax). Bull Exp Biol Med 170, 384–388 (2021). https://doi.org/10.1007/s10517-021-05072-z

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Key Words

  • Semax
  • restraint stress
  • colon
  • corticosterone