[Anticonvulsants as bioantioxidants under stress conditions].

The action of heterocyclic amides series (ethosuximide, phenytoin, primidone) on lipid peroxidation and membrane bound monoamine oxidases A and B under stress condition has been studied. The intraperitoneal injection of the drugs resulted in enhancement of SOD, decrease of brain malondialdehyde content and mitochondrial activity of monoamine oxidases A and B.

[Modulation of reactivity of cyclic adenosine monophosphate phosphodiesterase under the effect of pyridinecarboxylic acid derivatives and Pt(IV) metal complexes on their basis].

The effect of substituted nicotinamides and isonicotinamides and Pt(IV) metal complexes based on the substituted nicotinamides and isonicotinamides on the activity of cAMP phosphodiesterase was studied. Isonicotinamide derivatives are efficient enzyme activators, whereas substituted nicotine amides are inhibitors of enzymatic cAMP phosphodiesterase activity; their inhibitory potency is comparable to that of theophylline used as a reference drug.

[Inhibition of active transport of calcium ions by PT(IV) and PD(II) metal complexes. Correlation between the process and antimetastatic action of drugs].

Newly synthesized compounds, namely, platinum and palladium metal complexes based on substituted pyridinecarboxylic acids inhibit both active transport of Ca ions and hydrolysis of ATP, catalyzed by sarcoplasmic reticulum Ca(2+)-ATPase. The degree of active transport of Ca ions to vesicles correlated to the inhibition of metastases of experimental melanoma B16 by compounds studied. We suggest that the mechanism responsible for inhibition of metastases by newly synthesized compounds consists in change of normal ratio of extra- and intracellular content of Ca2+ ions that influences platelet aggregation, required for adhesion of metastasizing tumor cells to vascular walls.

[Structural-functional changes in biomembranes during complications of diabetes mellitus and their pharmacological correction].

The decrease of sorbitol dehyidrogenase activity and the increase both of aldoso reductase activity and sorbitol concentration in aorta or eye lens under experimental diabetic angiopathy have been shown. The structural and functional alterations in erythrocytes membranes under angiopathy studied by spin- and luminesoense probes confirm the hypothesis on the major role of membrane pathology processes in the pathogenesis of diabetic mellitus. Pharmacological correction of diabetic angiopathy by glucophag or new antioxidant LBK-78 normalized the studied diversions on the membranes level.

[The hormone-metabolic changes in the diabetic angiopathy].

Biochemical, morphological and electron-microscopic readings of blood serum, liver, aorta and brain vessels, and in crystalline lens were investigated in intact and experimental animals during the process of experimental diabetes mellitus formation. The experimental diabetes mellitus was induced by L-adrenaline implementation and atherogenous load. Characteristics of lipid metabolism, peroxide lipid oxidation, sorbitol way of glucose metabolism, glucose and insulin levels conform to diabetes mellitus.