Tác dụng hạ đường huyết của các cao chiết từ Rau trai (Commelina diffusa) trên mô hình chuột đái tháo đường

This study aimed to investigate the blood glucose stabilising effect of extracts from Commelina diffusa Burm.f. on glucose tolerance test and diabetes test in white mice by streptozotocin. The diabetic mice were induced to hyperglycemia by intraperitoneal injection of streptozotocin in a single dose (170 mg/kg). Water extract, 96% ethanol extract, and 50% ethanol extract of C. diffusa were given orally for 7 days and the reference drug glibenclamide was given orally once on the 7th experimental day. The hypoglycemic effect was evaluated by quantifying fasting plasma glucose concentration and glucose tolerance test. The results of 96% ethanol extract of C. diffusa at two oral doses of 0.21 and 0.42 g/kg showed a more typical hypoglycemic effect than the water extract (0.36 and 0.72 g/kg) and 50% ethanol extract (0.49 and 0.98 g/kg) in both fasting blood glucose and glucose tolerance tests. The hypoglycemic effect of 96% ethanol extract of C. diffusa was equivalent to glibenclamide at a dose of 5 mg/kg measured in fasting state and was weaker than glibenclamide in the glucose tolerance test.