title: In vitro effects of NSAIDS and paracetamol on oxidative stress-related parameters of human erythrocytes.
abstract: In vitro effects of widely used nonsteroidal antiinflammatory drugs (NSAIDs) and paracetamol were studied on oxidative stress-related parameters of human red blood cells (RBC). Membrane lipid integrity, activity of erythrocyte antioxidant enzymes; i.e. glutathione S-transferase (GST), selenium dependent-glutathione peroxidase (Se-GPx), and catalase (CAT), and hemolytic/stabilizing action of the drugs on erythrocyte membrane were assessed. Diclofenac, indomethacin and paracetamol at the therapeutic and higher concentrations, and dipyrone at the high concentration exerted a statistically significant inhibition on H2O2 forced erythrocytic membrane lipid peroxidation (EMLP). Increased hemolysis was observed by Na-salicylate, naproxen and ketorolac at therapeutic and higher concentrations, and by diclofenac and tiaprofenic acid at high concentrations, while the others seemed to stabilize the membrane at the same conditions. Na-salicylate inhibited GST activity at the therapeutic dose, however activated the same enzyme at high concentrations. Naproxen, tiaprofenic acid and piroxicam caused a decrease in GST activity at therapeutic doses. Paracetamol caused an activation at a high dose. Tiaprofenic acid, ketorolac, naproxen and piroxicam caused a significant Se-GPx inhibition. Erythrocyte CAT activity was increased by Na-salicylate, acemetacin, and tenoxicam at the therapeutic, and by dipyrone at the high concentration. Our results suggest that NSAIDs and paracetamol may be involved in oxidative/antioxidative processes of human erythrocytes. Also, the in vitro EMLP method can be considered as a simple test for evaluating possible antioxidant potency of chemicals.
authors.affiliation: Department of Toxicology, Pharmacy Faculty of Hacettepe University, Ankara, Turkey. hilmi@tr.net
authors.forename: H
authors.initials: H
authors.lastname: Orhan
authors.forename: G
authors.initials: G
authors.lastname: Sahin
mesh_terms: D000082:Acetaminophen / Q000494:pharmacology*; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000737:chemistry / Q000494:pharmacology*; D000975:Antioxidants / Q000494:pharmacology*; D002374:Catalase / Q000378:metabolism; D004910:Erythrocyte Membrane / Q000187:drug effects / Q000201:enzymology; D004912:Erythrocytes / Q000187:drug effects* / Q000378:metabolism; D005979:Glutathione Peroxidase / Q000378:metabolism; D005982:Glutathione Transferase / Q000378:metabolism; D006461:Hemolysis / Q000187:drug effects; D006801:Humans; D066298:In Vitro Techniques; D015227:Lipid Peroxidation / Q000187:drug effects; D018384:Oxidative Stress / Q000187:drug effects*; D013329:Structure-Activity Relationship
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; D000975:Antioxidants; D000082:Acetaminophen; D002374:Catalase; D005979:Glutathione Peroxidase; D005982:Glutathione Transferase