HEPATOPROTECTIVE ACTIVITY OF MONASCUS PURPUREUS (RED RICE YEAST) IN DIABETIC RATS ALONE OR IN COMBINATION WITH PIOGLITAZONE: AN EFFECT MEDIATED THROUGH CYTOKINES, ANTIOXIDANTS AND LIPID BIOMARKERS
Keywords:
Monascus purpureus, Diabetes, Pioglitazone, Liver, StreptozocinAbstract
Objective: Diabetes induces many complications such as cardiovascular problems, cataracts, kidney damage and polyneuropathy. Streptozotocin (STZ) induced diabetes is considered one of the most common animal models in rats. The present study investigated the effects of Monascus purpureus (MP) alone or in combination with pioglitazone on glucose level and on liver in streptozotocin (STZ) diabetic rats.
Methods: In this study were divided into five experimental groups (normal, untreated STZ-diabetic (60 mg/kg B.W., IP), treated STZ-diabetic with Monascus purpureus (500 mg/kg B. W, oral), treated STZ-diabetic with pioglitazone (10 mg/kg B.W., oral) and treated STZ-diabetic with MP (250 mg/kg B. W, oral)+pioglitazone (10 mg/kg B.W., oral)). Treatment continued for 14 d then blood sampling was done to assess blood glucose. At the end of the study, the animals were fasted overnight, anesthetized with sodium pentobarbital (60 mg/kg i.p.), and sacrificed to collect tissues samples (liver, pancreases).
Results: Throughout the experimental period, all treatments significantly (P<.05) lowered serum glucose, triglycerides, cholesterol, c-peptide and IL-6. In addition, hepatic cholesterol and triglycerides levels were also lowered. Moreover, the treated diabetic rats showed higher activity of reduced glutathione (P<.05) in the liver compared with the diabetic control rats and inhibited diabetes induced elevation in the level of malondialdehyde in liver.
Conclusion: The results of this study clearly demonstrated that MP act by many ways, including anti-hyperglycemic, antioxidant effects and pancreatic β-cell protection. From these points, it seems that MP may be a useful supplement to alleviate the development of diabetes and its complications.
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