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Pathologies involving oxidative stress are indicative of malfunction of endogenous antioxidant capacity. Numerous efforts were made to design and synthesize biologically active antioxidants and free oxygen radical scavenging substances that could improve the endogenous antioxidant status. The antioxidant and reactive-oxygen-species-scavenging activity of(More)
1. The review summarizes the most important data known so far on chemistry, pharmacodynamics, toxicology and clinics of the investigational agent, pyridoindole stobadine. 2. Stobadine was shown to be able to scavenge hydroxyl, peroxyl and alkoxyl radicals, to quench singlet oxygen, to repair oxidized amino acids and to preserve oxidation of SH groups by(More)
Hypochlorous acid (HOCl) concentration-dependently decreased ATPase activity and SH groups of pure Ca-ATPase from sarcoplasmic reticulum (SERCA) of rabbit skeletal muscle with IC(50) of 150 micromol/l and 6.6 micromol/l, respectively. This indicates that SH groups were not critical for impairment of Ca-ATPase activity. Pure Ca-ATPase activity was analysed(More)
The aim of this study was to further clarify which part of human low density lipoprotein (LDL) is attacked by the MPO/H2O2/Cl- -system and which reactive oxygen species is responsible for the attack. Therefore the influence of this system on the modification of the lipid and protein moiety of LDL was studied in vitro. Using the monochlorodimedone assay it(More)
1. In nonanesthetized rabbits temporal occlusion of the abdominal aorta was used to induce oxidative stress in the lower part of the body including distal segments of the spinal cord. 2. Spinal cord samples were taken from the animals exposed to 25-min aortic occlusion (AO) or to occlusion followed by 1- or 2-hr reperfusion (AO/R1 or AO/R2, respectively) or(More)
Adjuvant arthritis (AA) was induced by intradermal administration of Mycobacterium butyricum to the tail of Lewis rats. In sarcoplasmic reticulum (SR) of skeletal muscles, we investigated the development of AA. SR Ca(2+)-ATPase (SERCA) activity decreased on day 21, suggesting possible conformational changes in the transmembrane part of the enzyme,(More)
OBJECTIVE Effect of peroxynitrite on SERCA1 activity was studied in correlation with enzyme carbonylation. Kinetic parameters and location of peroxynitrite effect on SERCA1 were determined. METHODS Carbonyls were determined by immunoblotting. FITC, NCD-4 and Trp fluorescence were used to indicate changes in cytosolic and transmembrane regions of SERCA1.(More)
Flavonoids, natural phenolic compounds, are known as agents with strong antioxidant properties. In many diseases associated with oxidative/nitrosative stress and aging they provide multiple biological health benefits. Ca(2+)-ATPases belong to the main calcium regulating proteins involved in the balance of calcium homeostasis, which is impaired in(More)
Sarcoplasmic reticulum Ca(2+)-ATPase (SERCA) is the pump crucial for calcium homeostasis and its impairment results in pathologies such as myopathy, heart failure or diabetes. Modulation of SERCA activity may represent an approach to the therapy of diseases with SERCA impairment involvment. Quercetin is flavonoid known to modulate SERCA activity. We(More)