title: Effects of methomyl on lipid peroxidation and antioxidant enzymes in rat erythrocytes: in vitro studies.
abstract: Erythrocytes are a convenient model to understand the membrane oxidative damage induced by various xenobiotic pro-oxidants. This study was designed to investigate the possibility of methomyl (Lannate 90% SP), S-methyl N-(methylcarbamoyloxy) thioacetimidate, to induce oxidative stress response in rat erythrocytes in vitro. Erythrocytes were incubated for 4 hours at 37 degrees C with different concentrations (0.0, 0.1, 0.5, 1.0, 1.5 and 2.0 mM) of methomyl. The results showed that methomyl decreased acetylcholinesterase (AChE), superoxide dismutase (SOD) and glutathione S-transferase (GST) activities and increased level of lipid peroxidation (LPO) as well as the percentage of haemolysis. The response occurred in a concentration-dependent manner. The study suggested that methomyl has the capability to induce oxidative damage as evidenced by increasing LPO and perturbations in various antioxidant enzymes.
authors.affiliation: Environmental Toxicology Research Unit, Pesticide Chemistry Department, National Research Centre, Dokki, Cairo, Egypt. samansour@hotmail.com
authors.forename: Sameeh A
authors.initials: SA
authors.lastname: Mansour
authors.forename: Abdel-Tawab H
authors.initials: AT
authors.lastname: Mossa
authors.forename: Tarek M
authors.initials: TM
authors.lastname: Heikal
mesh_terms: D000110:Acetylcholinesterase / Q000378:metabolism; D000818:Animals; D000975:Antioxidants / Q000494:pharmacology*; D004910:Erythrocyte Membrane / Q000187:drug effects* / Q000201:enzymology; D005982:Glutathione Transferase / Q000378:metabolism; D066298:In Vitro Techniques; D007306:Insecticides / Q000633:toxicity*; D015227:Lipid Peroxidation / Q000187:drug effects*; D008297:Male; D008724:Methomyl / Q000633:toxicity*; D018384:Oxidative Stress / Q000187:drug effects*; D051381:Rats; D017208:Rats, Wistar; D013482:Superoxide Dismutase / Q000378:metabolism
chemical_list: D000975:Antioxidants; D007306:Insecticides; D008724:Methomyl; D013482:Superoxide Dismutase; D005982:Glutathione Transferase; D000110:Acetylcholinesterase