Oxygen Radicals and Peroxynitrite Inflammatory Properties of IgG Modified by
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Involvement of Cytochrome P-450 in n-Butyl Nitrite-Induced Hepatocyte Cytotoxicity
Addition of n-butyl nitrite to isolated rat hepatocytes caused an immediate glutathione depletion followed by an inhibition of mitochondrial respiration, inhi- bition of glycolysis and ATP depletion. At cytotoxic butyl nitrite concentrations, lipid peroxidation occurred before the plasma membrane was disrupted. Cytochrome P-450 inhibitors inhibited peroxynitrite formation and prev...
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OBJECTIVE Antioxidant, anti-inflammatory and venoconstrictor properties have been attributed to extracts from Aesculus hippocastanum. These unusual and diverse properties may be possibly basically linked with ability to scavenge free radicals. MATERIALS AND METHODS The scavenging capacity of dry horse chestnut extract of and escin have been investigated in vitro against superoxide anion radic...
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Exposure of human blood plasma to peroxynitrite in the presence of 3,5-dibromo-4-nitrosobenzenesulphonic acid (DBNBS) resulted in the trapping of a strongly immobilized nitroxide radical adduct. The adduct was due to protein-centred radicals derived not only from serum albumin but also from other major plasma proteins (fibrinogen, IgG, alpha1-antitrypsin and transferrin). Urate significantly pr...
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BACKGROUND Alopecia areata (AA) is a common form of localized, non-scarring hair loss. The cause of AA is unknown but reports suggest an autoimmune etiology, where oxygen free radicals play an important role. OBJECTIVE The aim of this study was to investigate the role of a hydroxyl radicals (·OH)-modified antioxidant enzyme, superoxide dismutase (SOD), in AA autoimmunity. METHODS SOD was mo...
متن کاملThe effects of oxygen free radicals on the carbohydrate moiety of IgG.
The CH2-linked glycoform of rheumatoid IgG is abnormal in having a reduced galactose content. This has been postulated to be a synthetic defect due to a decrease in the level of rheumatoid B cell galactosyltransferase. However, more recent work has indicated that agalactosylation may be common to chronic inflammatory diseases. In this work we have investigated the effect of oxygen free radicals...
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