title: Protective effect of taurine on myocardial antioxidant status in isoprenaline-induced myocardial infarction in rats.
abstract: We have examined the protective effect of taurine on the myocardial antioxidant defense system in isoprenaline (isoproterenol)-induced myocardial infarction in rats, an animal model of myocardial infarction in man. Levels of diagnostic marker enzymes in plasma, lipid peroxides and reduced glutathione, and the activity of glutathione-dependent antioxidant enzymes and anti-peroxidative enzymes in the heart tissue were determined. Intraperitoneal administration of taurine significantly prevented the isoprenaline-induced increases in the levels of alanine aminotransferase, aspartate aminotransferase, lactate dehydrogenase, and creatine phosphokinase in the plasma of rats. Taurine exerted an antioxidant effect against isoprenaline-induced myocardial infarction by preventing the accumulation of lipid peroxides and by maintaining the level of reduced glutathione and the activity of glutathione peroxidase, glutathione-S-transferase, catalase and superoxide dismutase at near normality. The results indicated that the cardioprotective potential of taurine was probably due to the increase of the activity of the free radical enzymes, or to a counteraction of free radicals by its antioxidant nature, or to a strengthening of myocardial membrane by its membrane stabilizing property.
authors.affiliation: Biochemistry and Nutrition Division, Central Institute of Fisheries Technology, Matsyapuri (PO) Cochin-682029, India.
authors.forename: K S
authors.initials: KS
authors.lastname: Shiny
authors.forename: S Hari Senthil
authors.initials: SH
authors.lastname: Kumar
authors.forename: K H Sabeena
authors.initials: KH
authors.lastname: Farvin
authors.forename: R
authors.initials: R
authors.lastname: Anandan
authors.forename: K
authors.initials: K
authors.lastname: Devadasan
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use*; D005978:Glutathione / Q000378:metabolism; D005979:Glutathione Peroxidase / Q000378:metabolism; D005982:Glutathione Transferase / Q000378:metabolism; D006321:Heart / Q000187:drug effects; D007274:Injections, Intraperitoneal; D007545:Isoproterenol; D015227:Lipid Peroxidation / Q000187:drug effects; D008297:Male; D009203:Myocardial Infarction / Q000139:chemically induced / Q000378:metabolism / Q000517:prevention & control*; D009206:Myocardium / Q000201:enzymology / Q000473:pathology; D051381:Rats; D017208:Rats, Wistar; D013482:Superoxide Dismutase / Q000378:metabolism; D013654:Taurine / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use*; D013997:Time Factors
chemical_list: D000975:Antioxidants; D013654:Taurine; D005979:Glutathione Peroxidase; D013482:Superoxide Dismutase; D005982:Glutathione Transferase; D005978:Glutathione; D007545:Isoproterenol