EFFECT OF TERMINALIA CHEBULA (HARAD) FRUIT EXTRACT ON CARDIOTOXICITY IN STREPTOZOTOCIN INDUCED DIABETIC RATS
Keywords:
Cardiac hypertrophy, Cardiotoxicity, Diabetes mellitus, Herbal drugs, Isoproterenol, Myocardial infarction, Necrosis, Streptozotocin, Terminalia chebulaAbstract
Objective: The aim of the study was to explore the protective activity of Terminalia chebula fruit extract on cardiotoxicity in streptozotocin (STZ) induced diabetic rats.
Methods: The animals were divided into eight groups of five each and were fed with high fat diet (HFD) except sham control, diabetic control and isoproterenol control. Diabetes was induced by administering single intraperitoneal (i. p.) injection of STZ (0.05 g/kg) in all groups except sham and isoproterenol control and was confirmed by testing blood glucose level after 48 h. Rats were pretreated with ethanolic extract of Terminalia chebula (0.25& 0.5 g/kg/d; per oral (p. o.)), pioglitazone (0.01 g/kg/d), carvedilol (0.002 g/kg/d) and normal saline throughout the study period (14 days). Cardiotoxicity was induced by the administrating two subcutaneous (s. c) injection of isoproterenol (ISO) (0.085 g/kg) at an interval of 24 h. Troponin was checked to confirm cardiotoxicity. The evaluation parameters include initial and final blood glucose level, change in body weight, food efficiency ratio (FER), heart weight-body weight ratio, biochemical estimations and histopathological studies.
Results: Pretreatment with Terminalia chebula produced significant (p<0.01) decrease in blood glucose level and heart weight-body weight ratio. It significantly decrease the elevated activity of the cardiac marker enzymes, alanine transaminase (ALT), lactate dehydrogenase (LDH), creatinine kinase (CK-MB) (p<0.01), similar to the standard drug carvedilol in isoproterenol injected rats. Pretreatment with Terminalia chebula showed absence of troponin and lesser degree of necrosis, edema, and myofibrillar degeneration.
Conclusion: Terminalia chebula has significant cardioprotective action against cardiotoxicity in STZ induced diabetic rats, which is comparable with standard drugs i.e., pioglitazone and carvedilol.
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