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The effect of treatment course of bioflavonoids quercetin and diquertin on phospholipids and fatty acid composition of erythrocytes membranes and amilorid-dependent activity Na+/H+ transmembrane exchanger of erythrocytes have been studied in condition of chronic physical tension in mice in consequence of extraordinary running strain. The studied drugs actively prevented from the changes of chemical composition and as a result structural and functional changes of erythrocytes membranes. It is established that the studied bioflavonoids prevented from the development of extraordinary physical strain syndrome.
View Article and Find Full Text PDFEffects of novel quercetin derivatives on sarco/endoplasmic reticulum Ca2+-ATPase activity.
Neuro Endocrinol Lett
April 2013
Institute of Experimental Pharmacology and Toxicology, Bratislava, Slovakia.
Objectives: We examined effect of novel quercetin derivatives on sarcoplasmic reticulum (SR) Ca-ATPase activity isolated from skeletal muscles and their potential to prevent injury of SERCA induced by peroxynitrite that is elevated in multiple pathological processes.
Methods: SR was isolated by ultracentrifugation, ATPase activity of SERCA was measured by NADH-coupled enzyme assay. Sulfhydryl and carbonyl groups content was determined to test oxidation of SERCA.
Effect of a course of treatment by bioflavonoids quercetin and diquertin on the physical work capacity, oxidant and antioxidant status of organism, and hemorheological parameters and deformability of erythrocytes have been studied under conditions of chronic physical overstrain in mice caused by sequential extraordinary running load. The drugs effectively prevent the development of oxidative stress, loss of elasticity of erythrocyte membranes and growth in dynamic blood viscosity in microcirculatory link of hemodynamics. It is established that both bioflavonoids significantly increase the physical work capacity of animals and prevent from the development of physical overstrain syndrome.
View Article and Find Full Text PDFThe effect of natural antioxidants in grade III chemical eye burn was studied in experiments on rabbits at various stages of burn disease. The use of histochrome, Gingko Biloba, and diquertin in combination with complex drug therapy decelerated the decrease in the antioxidant potential of tear fluid and blood plasma. This treatment was also followed by a decrease in the concentration of end products of free radical oxidation.
View Article and Find Full Text PDFChemical eye burns were accompanied by free radical oxidation of lipids and dysfunction of the antioxidant protection system. The decrease in antioxidant activity of blood plasma reflected a generalized type of these processes. The concentration of thiobarbituric acid-reactive substances increased in blood plasma from rabbits with eye burns.
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