[Behavioral and electrophysiological analysis of the choline-positive effect of nootropic dipeptide acylproline (GVS-111)]

Eksp Klin Farmakol. Mar-Apr 2001;64(2):11-4.
[Article in Russian]

Abstract

The behavioral experiments using a passive avoidance learning model showed that the new cognition-enhancing acyl-prolyn containing dipeptide GVS-111 promotes recovery of the test performance in animals with a long-term memory deficit caused by the M-cholinolytic scopolamine (1 mg/kg/day scopolamine for 20 days, followed by 0.5 mg/kg/day GVS-111 for 10 days). At the same time, GVS-111 increased the duration of tremor induced by the M-cholinomimetic arecoline. The results of electrophysicological experiments showed that GVS-111 in a concentration range from 10(-11) to 10(-9) M increased amplitude of the neural response to acetylcholine (Ach) microappications in 75% of the isolated neurons of Helix Pomatum and produced a predominantly facilitating effect upon the endoneuronal pacemaker activity. The effect of GVS-111 upon the Ach response in a part of neurons was attenuated or even blocked by scopolamine, and in the other neurons--by the N-cholinolytic d-tubocurarine. This fact indicates that both muscarinic and nicotinic receptors are involved in the mechanism of the cholino-sensitizing action of GVS-111 upon the neuronal activity.

MeSH terms

  • Acetylcholine / pharmacology
  • Animals
  • Avoidance Learning / drug effects*
  • Dipeptides / pharmacology*
  • Electrophysiology
  • Ganglia, Invertebrate / cytology
  • Helix, Snails
  • In Vitro Techniques
  • Male
  • Mice
  • Muscarinic Antagonists / pharmacology
  • Neurons / physiology
  • Nootropic Agents / pharmacology*
  • Rats
  • Rats, Wistar
  • Scopolamine / pharmacology

Substances

  • Dipeptides
  • Muscarinic Antagonists
  • Nootropic Agents
  • ethyl phenylacetyl-Pro-Gly
  • Scopolamine
  • Acetylcholine