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We studied the influence of intraperitoneal injection of ATP-sensitive potassium channels inhibitor glibenclamide in doses of 0.01, 0.1, 1, and 10 mg/kg on the effects of a new pyrazolo[C]pyridine derivative GIZh-72 (4,6-dimethyl-2-(4-chlorphenyl)-2,3-dihydro-1Hpyrazolo[ 4,3-C]pyridine-3-on, chloral hydrate; 20 mg/kg, intraperitoneally) in the marble burying and open-field tests in mice. It was found that glibenclamide produced an anxiolytic effect in the open-field test (in a dose of 0.01 mg/kg) and anticompulsive effect in the marble burying test (in doses of 1 and 10 mg/kg). The observed behavioral effects of glibenclamide did not depend on blood glucose level. At the same time, glibenclamide in subeffective (0.01 and 0.1 mg/kg) and effective (1 and 10 mg/kg) doses potentiated the psychotropic effects of GIZh-72 in these tests. It can be assumed that the psychotropic effects of GIZh-72 depend on functional activity of ATP-sensitive potassium channels.Whole-cell patch-clamp technique was employed to record chloride ionic current IGABA evoked by fast (600 msec) application of GABA to hippocampal pyramidal neurons and cerebellar Purkinje cells isolated from rat brain. GABA solution in the application pipette was either neutral (pH 7.4) or acidic (pH 7.0 or 6.0). Application of protons to neurons causes a rapid, reversible, and dose-dependent decrease in the amplitude of IGABA; the effect was more pronounced on hippocampal neurons (carrying both synaptic and extrasynaptic GABAA receptors) than in cerebellar Purkinje cells (predominantly equipped with synaptic GABAA receptors). In hippocampal neurons, pharmacological isolation of extrasynaptic component from total IGABA was performed with GABAA receptor antagonist gabazine (50 nM). The extrasynaptic component of IGABA was stronger blocked by protons than total IGABA. It was concluded that acidic medium produced more potent blocking effect on extrasynaptic GABAA receptors than on synaptic ones.We studied the influence of maternal experimental streptozotocin-induced type 1 diabetes mellitus on motility of spermatozoa in adult progeny. A decrease in the summary count of spermatozoa and changes in their subpopulation composition were revealed. Specifically, the count of nonfertile spermatozoa (immotile and jerking cells) increased, while fertile fraction (progressively motile and low motile cells) decreased. These shifts were responsible for lower index of spermatozoon motility (proportion of fertile to infertile sums of spermatozoa) in the progeny of females with experimental type 1 diabetes mellitus. These results persuasively demonstrated the negative impact of maternal diabetes mellitus on the motor activity of the male germ cells in the progeny under experimental conditions.Immunogenic and protective activity of recombinant pneumolysin was studied in experiments on male BALB/c mice. The mice were immunized intraperitoneally with recombinant pneumolysin sorbed on Al(OH)3 (200 μg per mouse). In 2 weeks after immunization, the isotypes of antibodies to recombinant pneumolysin in the serum of immunized mice were determined by ELISA. The animals were infected with Streptococcus pneumoniae serotype 3. Immunization with recombinant pneumolysin induced the production of anti-pneumolysin antibodies, mainly of IgG1 subisotype. On day 21 after intraperitoneal infection with S. pneumoniae serotype 3 in a dose of 106 microbial cells, the survival rate of animals immunized with recombinant pneumolysin in a dose of 25 μg/mouse was 67% vs. 0% in the control (p less then 0.001). Recombinant pneumolysin could be considered as a promising protective antigen for inclusion in the serotype-independent vaccine against S. pneumoniae.Plasma cytokine concentration in patients with Parkinson's disease and mutation in GBA gene, in patients with sporadic Parkinson's disease, and in healthy volunteers were measured by ELISA and multiplex analysis. In patients with Parkinson's disease and mutation in GBA gene, elevated plasma concentrations of IL-1β and TNFα were revealed by ELISA in comparison with both controls and patients with sporadic form of Parkinson's disease. Multiplex analysis revealed enhanced secretion of IL-1β, IL-2, IFNγ and reduced plasma levels of monocyte chemoattractant protein-1 (MCP-1) in patients with Parkinson's disease and mutation in GBA gene (in comparison with other groups) and increased plasma levels of IL-13 (only in comparison with the healthy volunteers). Our results support the hypothesis that the concentrations of inflammatory mediators are increased in patients with Parkinson's disease and mutation in GBA gene.We analyzed the relationship between polymorphic loci of CYP3A genes (CYP3A4 (rs2740574), CYP3A5 (rs776746) and CYP3A7 (rs2257401)) with the development of chronic mercury intoxication. Of 170 men examined, 120 were workers chronically exposed to mercury vapors and 50 were carriers of GG-HSPA1B (+1267A/G) genotype associated with chronic mercury intoxication. Urinary content of 4-hydroxyantipyrine (4-HAP) generated in the reaction predominantly catalyzed by CYP3A4/CYP3A5 was studied in workers without chronic mercury intoxication (group 1, N=46) and patients in the delayed period of chronic mercury intoxication (group 2, N=74) depending on the genotypes of CYP3A4 and CYP3A5. https://www.selleckchem.com/ For polymorphic loci CYP3A5 and CYP3A7, a tendency to an increase in the frequency of genotypes with rare alleles was found (p=0.071 and p=0.078) in the combined group (group 2 together with GGHSPA1B genotype carriers) relative to group 1. The high level of linkage disequilibrium was noted, especially for the pair rs776746 and rs2257401 (LD (r)=0.89). In group 2, a trend to 4-HAP decrease compared to group 1 (p=0.056 and p=0.065) was revealed for carriers of AA-CYP3A4 and GG-CYP3A5 genotypes. The involvement of CYP3A in the development of mercury neurotoxic effect remains unclear.The method of pulsed laser processing with a nanosecond pulse duration was employed to obtain a nanotexture on the surface of copper alloys. The effect of the obtained micro- and nanotexture on the bactericidal properties of the surface upon its contact with suspensions containing of E. coli K12 C600 or K. pneumoniae 811 cells in a nutrient medium were studied. The evolution of cell morphology after on the nanotextured surface was analyzed using scanning electron microscopy, and changes in biological fluid during this contact were studied by mass spectrometry. It was shown that massive death of bacterial cells both in the suspension and on the nanotextured surface was determined by combined toxic effects of the hierarchically textured surface and high concentration of Cu2+ ions in the medium.
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