Rita U Ostrovskaya

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Effects of gamma-hydroxybutyric acid (GOBA) on psychomotor skills related to driving were studied in healthy student volunteers. The effects of oral GOBA 1.0 and 2.0 g, alone or in combination with 0.5 g/kg of ethyl alcohol, were compared in double-blind cross-over trials against oral diazepam 10 mg (D), alcohol 0.5 g/kg, and lactose placebo. Reactive and(More)
1. With the use of the two-microelectrode voltage-clamp method, three types of voltage-activated ionic currents were examined in isolated neurons of the snail Helix pomatia: high-threshold Ca2+ current (ICa), high-threshold Ca(2+)-dependent K+ current (IK(Ca)) and high-threshold K+ current independent of Ca2+ (IK(V)). 2. The effect of bath application of(More)
The tripeptide Glu-His-Pro-NH2, a hypothalamic neurohormone (thyrotropin releasing hormone), sometimes called thyroliberin, according to observations made by many workers has a central stimulating antidepressant, analeptic action [8, 9]. This paper gives the results of a combined pharmacological study of thyrotropin releasing hormone (TRH). The effect of(More)
Drugs of the benzodiazepine series (clonazepam, lorazepam, diazepam and medazepam) increase the inhibitory processes in the cerebral cortex as it has been shown by means of the recovery cycles of the intracortical response. There is a correlation between the effect on the recovery cycles and their protective action against convulsions induced by GABA(More)
The effects of the novel proline-containing nootropic and neuroprotective dipeptide, noopept (GVS-111, N-phenylacetyl-L-prolylglycine ethyl ester) were investigated in NMRI mice following olfactory bulbectomy. We have shown previously that these animals developed Alzheimer's disease (AD)-like behaviour, morphology and biochemistry including impairment of(More)
Diazepam was shown to increase postexcitatory inhibition within the brain cortex as revealed by its influence upon the recovery cycles both of intracortical and primary responses. The specific interrelationship between diazepam and some drugs affecting brain GABA level suggests the possibility of a GABA mediated mechanism in the diazepam effect. The(More)
The influence of compounds which reduce or potentiate GABA-ergic inhibition on the effect of analgesics of various structures was studied. The effect was estimated according to the analgesic activity (experiments in rats) and the suppression of the impulse summation in the central nervous system (experiments in rabbits). It was shown that GABA-negative(More)
Experiments on adult Wistar rats showed that injection of β-amyloid(25–35) (2 µg) into Meynert basal nuclei caused long-term memory deficiency which was detected 24 days after this injection by the memory trace retrieval in conditioned passive avoidance reflex (CPAR). The effects of noopept, an original nootropic and neuroprotective dipeptide, on the(More)
The neuroprotective activity of a novel N-acylprolyl-containing dipeptide analog of the nootropic 2-oxo-1-pyrrolidine acetamide (Piracetam) designated as GVS-111 (DVD-111/Noopept) was tested in two in vitro models of neuronal degeneration mediated by oxidative stress: normal human cortical neurons treated with H(2)O(2), and Down's syndrome (DS) cortical(More)
Application of nootropic agent Noopept on hippocampal slices from Wistar rats enhanced the inhibitory component of total current induced by stimulation of Shaffer collaterals in CA1 pyramidal neurons, but did not affect the excitatory component. A direct correlation between the increase in the amplitude of inhibitory current and agent concentration was(More)