ABSTRACT
Diabetes mellitus interferes with the metabolism of carbohydrates, causing chronic hyperglycemia. Dyslipidemiain diabetes is a condition that leads to cardiovascular disease. This study was aimed to evaluate the effect of hydroalcoholic Prosopis ruscifolia (Pr) leaves extract on hyperglycemia and lipid profile in normo- and hyperglycemicmice. Mice hyperglycemia was induced by alloxan, animals were treated with Pr (50, 100, 200 mg/kg, p.o., 28 days).Fasted blood glucose level on days 7, 14, 21, and 28 was determined. Blood glucose remained within the normalrange in the groups of normoglycemic animals treated with Pr. In the hyperglycemic animals, 100 mg/kg of Pr extractreduced the glycemia, this effect became markedly evident since day 7, until the end of experimental period (p <0.0001), the total reduction reached was 60%. The lipid profile of normal and hyperglycemic mice was evaluated with100 mg/kg, on day 28. A non-significant increase in total cholesterol and low density cholesterol, in hyperglycemicanimals treated with vehicle, and a statistically significant increase (p < 0.0001) in the level of triglyceride and verylow density cholesterol (VLDL) level (p < 0.0001) in normoglycemic animals treated with Pr, compared to the controlgroup were denoted. This could indicate that Pr has a stimulating action on insulin secretion, since hyperinsulinemiais also associated with an increase in the quantity of atherogenic particles of VLDL cholesterol and triglycerides.The coronary risk index and the atherogenic index of hyperglycemic animals treated with Pr showed a reductioncompared with the untreated hyperglycemic ones. The presence of three piperidine alkaloids, juliprosopine, 3’’’’–Oxo-juliprosopine, and julifloridine, previously isolated from P. juliflora, was confirmed. Also, the presence of theflavonoid quercetin was detected in this plant. Those compounds are strong candidates presumably responsible forimparting the effect on glycemia and lipid profile reported here.
ABSTRACT
Prosopis ruscifolia, vinal, is used to treat diabetes. This work aims to study the influence of the hydro-alcoholic extract of this plant on alloxan induced diabetic rats. Hydroalcoholic extract from aerial parts of Prosopis ruscifolia Griseb. (Fabaceae) was prepared (Pr) and the safety was assessed to determine the acute toxicity in mice. The hypoglycemic activity of the extract was evaluated in normo- and hyperglycemic rats. Hyperglycemia was induced by intravenous administration of alloxan monohydrate (32 mg/Kg body weight). Rats with blood glucose level higher than 200 mg/dL were used for the experiment. The animals were assigned to different groups and treated with a single dose of solvent (water, p.o.), Pr (100 mg/Kg, p.o.), tolbutamide (100 mg/Kg, p.o.) or insulin (5 IU/kg, i.p.); Pr extract was also administered to normoglycemic rats (100 mg/kg, p.o.). Fasted blood glucose level was measured at times 0, 1, 2, 4 and 24 h after treatment, in the acute test, and at days 0, 14, 21 and 28, in the chronic study. No evidence of acute toxicity in mice was observed. The results show that Pr extract significantly reduces blood glucose level in hyperglycemic rats (p < 0.01) 24 h after administration of a single oral dose of 100 mg/Kg. Treatment with Pr during 28 days showed a reduction in blood glucose level in experimentally hyperglycemic rats. Additionally, rats treated with the extract showed a reduced body weight gain. Prosopis ruscifolia hydroalcoholic extract showed low toxicity. After acute and chronic oral treatment was effective to reduce fasted blood glucose level, and the body weight gain was less after 28 days in the treated group.
ABSTRACT
Kyllinga brevifolia Rottb., Cyperaceae, rhizomes have been widely used in the Paraguayan folk medicine as digestive, diuretic, sedative, tonic, antispasmodic and sudorific. The purpose of this study is to characterize the putative sedative, anxiolytic effects of the crude hydro-ethanolic extract (CEKb) and fractions of the rhizome of K. brevifolia, in male mice. The behaviour of mice was assessed in the open field, hole board, rota-rod and elevated plus-maze (EPM) test. Oral treatment with single doses of 10, 100 and 1000 mg/kg of CEKb and 10 mg/kg of ethyl acetate fraction (KbF-ethyl-ac) increased the duration of the sleeping time induced by pentobarbital. Oral administration of 1, 10 and 100 mg/kg of CEKb and 0.1, 1 and 10 mg/kg of KbF-ethyl-ac also significantly increased the time-spent and arm entries into open arms of the elevated plus maze (EPM) versus control group. These findings indicate that K. brevifolia exerts a weak sedative and an interesting anxiolytic-like effect in mice and suggest its potential usefulness for the treatment of anxiety in humans.