title: Preventive effect of Aegle marmelos leaf extract on isoprenaline-induced myocardial infarction in rats: biochemical evidence.
abstract: We have evaluated the preventive effects of an aqueous Aegle marmelos leaf extract (AMLEt) in isoprenaline (isoproterenol)-induced myocardial infarction in rats. Rats were pretreated with AMLEt (50, 100 or 200 mg kg(-1)) for 35 days. After the treatment period, isoprenaline (200 mg kg(-1)) was administered subcutaneously to rats at an interval of 24 h for two days. The activity of creatine kinase (CK) and lactate dehydrogenase (LDH) was significantly increased in serum and significantly decreased in heart of isoprenaline-treated rats. Pretreatment with AMLEt decreased the activity of CK and LDH in serum and increased them in the heart. The activity of sodium-potassium dependent adenosine triphosphatase (Na(+)K(+)ATPase) was significantly decreased while the activity of calcium dependent adenosine triphosphatase (Ca(2+)ATPase) was simultaneously increased in the heart and aorta. AMLEt pretreatment increased the activity of Na(+)K(+) ATPase and decreased the activity of Ca(2+)ATPase in the heart and aorta simultaneously. The levels of cholesterol and triglycerides increased, while the levels of phospholipids decreased in the heart and aorta of isoprenaline-treated rats. In AMLEt-pretreated rats the levels of cholesterol and triglycerides decreased whereas phospholipids increased in heart and aorta. All the deranged biochemical parameters were restored with 200 mg kg(-1) AMLEt. Similarly alpha-tocopherol (60 mg kg(-1))-pretreatment to isoprenaline-treated rats exhibited a significant effect on all the parameters studied. The results from this study may have clinical relevance.
authors.affiliation: Department of Biochemistry, Annamalai University, Annamalainagar 608 002, Tamil Nadu, India. p_smprince@yahoo.co.in
authors.forename: P Stanely Mainzen
authors.initials: PS
authors.lastname: Prince
authors.forename: M
authors.initials: M
authors.lastname: Rajadurai
mesh_terms: D000284:Administration, Oral; D045471:Aegle / Q000737:chemistry*; D000818:Animals; D000975:Antioxidants / Q000008:administration & dosage / Q000494:pharmacology; D001011:Aorta / Q000737:chemistry / Q000187:drug effects / Q000201:enzymology; D000252:Calcium-Transporting ATPases / Q000378:metabolism; D002462:Cell Membrane / Q000187:drug effects / Q000201:enzymology; D003402:Creatine Kinase / Q000097:blood; D004305:Dose-Response Relationship, Drug; D005260:Female; D006321:Heart / Q000187:drug effects; D000960:Hypolipidemic Agents / Q000008:administration & dosage / Q000494:pharmacology; D007545:Isoproterenol; D007770:L-Lactate Dehydrogenase / Q000097:blood; D008515:Medicine, Ayurvedic; D009203:Myocardial Infarction / Q000097:blood / Q000139:chemically induced / Q000517:prevention & control*; D009206:Myocardium / Q000201:enzymology / Q000473:pathology; D009929:Organ Size / Q000187:drug effects; D008517:Phytotherapy; D010936:Plant Extracts / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D018515:Plant Leaves / Q000737:chemistry*; D051381:Rats; D017208:Rats, Wistar; D000254:Sodium-Potassium-Exchanging ATPase / Q000378:metabolism; D014280:Triglycerides / Q000378:metabolism
chemical_list: D000975:Antioxidants; D000960:Hypolipidemic Agents; D010936:Plant Extracts; D014280:Triglycerides; D007770:L-Lactate Dehydrogenase; D003402:Creatine Kinase; D000252:Calcium-Transporting ATPases; D000254:Sodium-Potassium-Exchanging ATPase; D007545:Isoproterenol