[The simple method of direct estimation of infectious process in mice and rats aerogenically infected with influenza virus].

Multiplication of influenza virus in laboratory animals (mice and rats) after aerogenic inoculation was recorded directly (by the agent accumulation in the lungs and trachea) and indirectly (by interferon concentration in the lungs of mice). Thermal inactivation of influenza virus in chick embryo allantoic fluid was observed (by 4.5-6 Ig within 48 h at 37 degrees C).

[The antiepileptic effects of the combined action of the new 1,4-dihydropyridine derivative glutapyrone with sodium valproate and phenobarbital].

Antiepileptic effects of a novel amino acid-containing 1,4-dihydropyridine glutapyrone and sodium valproate during combined therapy on generalized pentylenetetrazol- and focal 4-aminopyridine-induced epileptic activity in rat brain cortex were studied, as were combined effects of glutapyrone and phenobarbital on maximal electroshock in mice. The results of these investigations suggest that combined treatment by glutapyrone and sodium valproate or phenobarbital is reasonable and helps potentiate the effect of each drug, thus significantly reducing their doses, and minimize the risk of side effects of the drugs id used in higher doses in case of long treatment.

[Changes in the level of cyclic nucleotides in the left and right sensorimotor areas of the cerebral cortex in rats after corazol-induced kindling].

Levels of cAMP and cGMP in the left and right areas of the rat sensorimotor cortex (SMC) 7 days after pentylenetetrazole kindling (30 days) were determined by radioimmunological assay. It is shown that levels of cyclic nucleotides remained unchanged in rats SMC 7 days after single injection of seizure dose (70 mg/kg) of pentylenetetrazole. Levels of cAMP and cGMP in SMC increased by 2-3 times after 30-day administration of physiological saline as compared to single injection; cortical asymmetry of cAMP and cGMP is absent.

[The effect of the new amino acid-containing 1,4-dihydropyridine glutapyrone on penicillin-induced focal epileptic activity and convulsions induced by bicuculline and thiosemicarbazide].

The experiments on focal penicillin-induced epileptic activity in the brain cortex (Wistar rats) and bicuculline- and thiosemicarbazide-induced seizures (Icr:Icl mice) showed that the glutapyrone possessed a significant antiepileptic activity. As previously shown, that glutapyrone has an influence on 45Ca2+ uptake by rat cortical synaptosomes (evoked by K+ depolarization) as compared with nifedipine and nimodipine, and it was effective in pentylenetetrazol-induced seizures in rats and mice. The mechanism of action of convulsants is associated with the disturbance of different links of GABAergic inhibition.