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Portulaca oleracea Leaf Aqueous Lyophilized Extract Reduces Hyperglycemia and Improves Antioxidant Status of Red Blood Cells and Liver in Streptozotocin-lnduced Diabetic Wistar Rats

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Journal of Pharmacy and Pharmacology 2017年第3期5卷 139-148页

作者： Guenzet Akila krouf djamil Berzou Sadia Laboratoire de Nutrition Clinique et Metabolique Departement de Biologie Faculte des Sciences de la Nature et de la VieUniversitd d'Oran Oran 31000 Alg~rie

The aim of this study was to investigate the antihyperglycemic and antioxidant effects of Po （Portulaca oleracea） lyophilised aqueous extract in diabetic male Wistar rats. Diabetes was induced intraperitonially by a single injection of STZ （streptozotocin）（60 mg/kg bw （body weight））. Twenty diabetic rats, weighing 263 ± 5 g, were divided into two groups fed a casein diet supplemented or not with Po extract （1 g/kg bw）, for four weeks. Control group （n = 6） received 0.23-0.25 mL of citrate buffer and was fed a standard diet during the experiment. The study was carried out at Oran University, Algeria and the entire experiments lasted from September 2011 to July 2012. Blood was obtained from the abdominal aorta of rats after fasting overnight and standard methods were used for the extraction of spices, determination of glycemia, insulinemia, lipid peroxidation and antioxidant enzymes activities. Portulaca oleracea treated compared to untreated rats, glycemia and HbAIc values were respectively 2.8- and 1.7-fold lower. TBARS （thiobarbituric acid reactive substances） concentrations were reduced in RBC （red blood cells）（-54%） and plasma （-65%）. Moreover, in liver and kidney, TBARS values were respectively 1.8- and 2-fold lower. SOD （superoxide dismutase） and GSH-Px （glutathione peroxidase） activities were increased respectively by ＋38% and ＋85%, in liver. GSSG-Red （glutathione reductase） activity was 1.9-fold higher in kidney, while CAT （catalase） was improved in kidney （＋48%）. In RBCs, SOD, GSH-Px, GSSH-Red and CAT activities were increased by 31%, 42%, 56% and ＋50%, respectively. These data have cast a new light on the actions of Portulaca oleracea and its antioxidant potential benefits in preventing diabetes and its complications.

关键词： Portulaca oleracea rats diabetes streptozotocin antioxidative enzymes TBARS.

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