title: Effect of squalene on tissue defense system in isoproterenol-induced myocardial infarction in rats.
abstract: This study was designed to examine the effects of squalene on tissue antioxidant status in isoproterenol-induced myocardial infarction in male albino rats. Levels of diagnostic marker enzymes [alanine aminotransferase (ALT), aspartate aminotransferase (AST), lactate dehydrogenase (LDH), and creatine phosphokinase (CPK)] in plasma, lipid peroxides, reduced glutathione, and the activities of glutathione-dependent antioxidant enzymes [glutathione peroxidase (GPx) and glutathione-S-transferase (GST)] and antiperoxidative enzymes [catalase (CAT) and superoxide dismutase (SOD)] in the heart tissue of experimental groups of rats were determined. The prior administration of squalene at 2% level along with feed for 45 days significantly prevented the isoproterenol-induced elevation in the levels of diagnostic marker enzymes in plasma of experimental rats. Squalene also exerted an antioxidant effect against isoproterenol-induced myocardial infarction by blocking the induction of lipid peroxidation. A tendency to prevent the isoproterenol-induced alterations in the level of reduced glutathione and in the activities of glutathione-dependent antioxidant enzymes and antiperoxidative enzymes was also observed. The cardioprotective effect of squalene might be ascribable to its antioxidant property and membrane stabilizing action.
authors.affiliation: Biochemistry and Nutrition Division, Central Institute of Fisheries Technology, Matsyapuri P.O., Cochin-682 029, India.
authors.forename: K H
authors.initials: KH
authors.lastname: Sabeena Farvin
authors.forename: R
authors.initials: R
authors.lastname: Anandan
authors.forename: S Hari Senthil
authors.initials: SH
authors.lastname: Kumar
authors.forename: K S
authors.initials: KS
authors.lastname: Shiny
authors.forename: T V
authors.initials: TV
authors.lastname: Sankar
authors.forename: T K
authors.initials: TK
authors.lastname: Thankappan
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000494:pharmacology / Q000627:therapeutic use; D005609:Free Radicals / Q000037:antagonists & inhibitors / Q000378:metabolism; D007545:Isoproterenol / Q000633:toxicity*; D015227:Lipid Peroxidation / Q000187:drug effects* / Q000502:physiology; D008099:Liver / Q000187:drug effects / Q000378:metabolism; D008297:Male; D009203:Myocardial Infarction / Q000139:chemically induced / Q000188:drug therapy* / Q000378:metabolism; D051381:Rats; D017208:Rats, Wistar; D012754:Sharks; D013185:Squalene / Q000494:pharmacology / Q000627:therapeutic use*
chemical_list: D000975:Antioxidants; D005609:Free Radicals; D013185:Squalene; D007545:Isoproterenol