title: Hyperglycemia can cause membrane lipid peroxidation and osmotic fragility in human red blood cells.
abstract: The present study has examined the effect of elevated glucose levels on membrane lipid peroxidation and osmotic fragility in human red blood cells (RBC). Defibrinated whole blood or RBC were incubated with varying concentrations of glucose at 37 degrees C for 24 h. RBC incubated with elevated levels of glucose showed a significantly increased membrane lipid peroxidation when compared with control RBC. A significant positive correlation was observed between the extent of glucose-induced membrane lipid peroxidation and the osmotic fragility of treated RBC. Glucose-induced membrane lipid peroxidation and osmotic fragility were blocked when RBC were pretreated with fluoride, an inhibitor of glucose metabolism; with vitamin E, an antioxidant; with para-chloromercurobenzoate and metyrapone, inhibitors of the cytochrome P-450 system; or with dimethylfurane, diphenylamine, and thiourea, scavengers of oxygen radicals. RBC treated with elevated glucose concentrations also showed an increase in NADPH levels. Exogenous addition of NADPH to normal RBC lysate induced membrane lipid peroxidation similar to that observed in the glucose-treated RBC. These data suggest that elevated glucose levels can cause the peroxidation of membrane lipids in human RBC.
authors.affiliation: Department of Pediatrics, Louisiana State University School of Medicine, Shreveport 71130.
authors.forename: S K
authors.initials: SK
authors.lastname: Jain
mesh_terms: D000328:Adult; D001462:Barbital / Q000494:pharmacology; D004910:Erythrocyte Membrane / Q000187:drug effects / Q000378:metabolism*; D005947:Glucose / Q000494:pharmacology; D006801:Humans; D006943:Hyperglycemia / Q000097:blood*; D066298:In Vitro Techniques; D015227:Lipid Peroxidation / Q000187:drug effects; D008563:Membrane Lipids / Q000097:blood*; D008954:Models, Biological; D009249:NADP / Q000097:blood; D009996:Osmotic Fragility / Q000187:drug effects; D010084:Oxidation-Reduction; D013012:Sorbitol / Q000097:blood
chemical_list: D008563:Membrane Lipids; D013012:Sorbitol; D009249:NADP; D001462:Barbital; D005947:Glucose