title: Dietary chitosan supplementation attenuates isoprenaline-induced oxidative stress in rat myocardium.
abstract: Despite considerable advances in diagnosis and management over the last three decades, acute myocardial infarction continues to be a major public health problem. It is predicted that ischemic heart diseases will constitute the major disease-burden worldwide in the year 2020. In the present study, an attempt has been made to examine the effects of dietary chitosan supplementation on lipid peroxidation and cardiac antioxidant defense system in isoprenaline-induced myocardial infarction in rats, an animal model of myocardial infarction in man. Dietary chitosan intake significantly attenuated the isoprenaline-induced lipid peroxidation and maintained the level of reduced glutathione at near normal. Its administration demonstrated an antioxidant effect by maintaining the activities of myocardial glutathione dependent antioxidant enzymes (glutathione peroxidase and glutathione-S-transferase) and antiperoxidative enzymes (superoxide dismutase and catalase) at levels comparable to that of controls. The results of the present study indicate that the salubrious effects of dietary supplementation of chitosan is probably related to a counteraction of free radicals and/or to normal maintenance of the activities of free radical enzymes and the level of GSH, which protect myocardial membrane against oxidative damage by decreasing lipid peroxidation.
authors: Biochemistry and Nutrition Division, Central Institute of Fisheries Technology, Matsyapuri (PO), Cochin 682029, Kerala, India.
authors: R
authors: R
authors: Anandan
authors: B
authors: B
authors: Ganesan
authors: T
authors: T
authors: Obulesu
authors: S
authors: S
authors: Mathew
authors: R S
authors: RS
authors: Kumar
authors: P T
authors: PT
authors: Lakshmanan
authors: A A
authors: AA
authors: Zynudheen
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000494:pharmacology*; D001835:Body Weight / Q000187:drug effects; D002462:Cell Membrane / Q000187:drug effects / Q000378:metabolism; D048271:Chitosan / Q000494:pharmacology*; D019587:Dietary Supplements; D004435:Eating / Q000187:drug effects; D005978:Glutathione / Q000378:metabolism; D000960:Hypolipidemic Agents / Q000494:pharmacology*; D007545:Isoproterenol / Q000494:pharmacology*; D015227:Lipid Peroxidation / Q000187:drug effects; D008297:Male; D009206:Myocardium / Q000166:cytology / Q000378:metabolism*; D018384:Oxidative Stress / Q000187:drug effects*; D051381:Rats; D017208:Rats, Wistar
chemical_list: D000975:Antioxidants; D000960:Hypolipidemic Agents; D048271:Chitosan; D005978:Glutathione; D007545:Isoproterenol