PMID: 8958147Jan 1, 1997Paper

Protection of oxidative hemolysis by demethyldiisoeugenol in normal and beta-thalassemic red blood cells

Free Radical Biology & Medicine
F N KoY H Kuo

Abstract

The purpose of this study was to evaluate the ability of demethyldiisoeugenol to protect normal and beta-thalassemic human red blood cells (RBCs) against oxidative damage in vitro. Oxidative hemolysis and lipid peroxidation of normal and beta-thalassemic human RBCs induced by aqueous peroxyl radical were suppressed by demethyldiisoeugenol in a concentration-dependent manner. The formation of proteins with high molecular weight and concomitant decrease of the low-molecular-weight proteins of RBCs challenge with aqueous peroxyl radical were inhibited by demethyldiisoeugenol. It also prevented the shortening of the Russell's viper venom (RVV)-clotting time mediated by prelytic radical-treated RBCs. In contrast, demethyldiisoeugenol inhibited oxidative hemolysis but not those metHb and ferrylHb formations caused by hydrogen peroxide (H2O2) in normal RBCs. Furthermore, demethyldiisoeugenol did not prevent the consumption of the cytosolic antioxidant, glutathione (GSH), in radical-treated RBCs. It also did not cause of a loss of sulfhydryl group during incubation with GSH. However, the diphenyl-2-picrylhydrazyl (DPPH) scavenging activity of demethyldiisoeugenol was dramatically increased in the presence of GSH. These results imply th...Continue Reading

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