Effects of methanol leaf extracts of Loranthus micranthus Linn from three host plants on some biochemical indices of diabetic rats (original) (raw)
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The methanol extracts of Loranthus micranthus fractions were collected from column chromatography. From TLC, the fraction 17 and 20 were selected based on the clear distiguishable of bands and few phytochemicals. Same fractions when subjected to GC-MS, fraction-17 yielded 13 and fraction-20 yielded 11 prominent compounds. Diabetic rats that were treated with the fraction 17 and 20 showed significantly increase in body weight (16.52 and 12.43 % respectively). Hypoglycemic effect and antihyperlipidemic characters (decrease in the previously elevated levels of serum cholesterol and serum triglycerides) were observed. The two fractions treated rats have also showed the regeneration of pancreatic connective tissue, acini, blood vessels, blood capillaries, pancreatic ducts and their walls, islets capsule and cells in accordance to proper cytoarchitecture. The in vivo antidiabetic property may be due to the presence of single or all phytochemicals in the fraction. Greater activity was obse...
Diabetes and Islet Biology, 2020
The antidiabetic effects of crude methanolic extracts of the leaf and twig of Loranthus micranthus was evaluated in Wister rats. To assess this, data were obtained for the determinant parameters of diabetic complications. Streptozotocin was administered for induction of diabetes; diabetic state was confirmed by persistent hyperglycemia (FBG ≥ 300mg/dl) at 72 hours post induction. Invitro inhibitory activity on α- amylase and α-glucosidase was assayed. Serum insulin, TNF-α, Total cholesterol, HDL, LDL, TG, atherogenic index, liver glycogen and glycated haemoglobin were evaluated. Histology of the pancreas was assessed. Phytochemical analysis revealed the presence of unique compounds in both extracts. In-vitro assay showed inhibitory effects of both extracts on α-amylase and α-glucosidase activity. Hyperglycemia was controlled in both extract-treated groups comparable to glibenclamide. Weight loss after diabetic induction was ameliorated in extracts treated groups; serum insulin level...
Original Article , 2018
Lannea edulis (Sond.) Engl. commonly known as wild grape is used traditionally for the treatment of diabetes. It is only found in Eastern and Southern Africa. Phytochemical screening, antihyperglycemic and antihyperlipidemic effects of aqueous extracts of L. edulis in alloxan induced diabetic rats were carried out. We report herein the findings of this research work. Lannea edulis crude aqueous extracts were obtained by hot infusion and evaporation method. Phytochemical screening was carried out and subsequently toxicity studies of the aqueous extracts were performed to establish the Lethal Dose 50 (LD 50) in albino rats. Alloxan monohydrate was used to induce diabetes in the rats. Lannea edulis positive control group doses of 100, 300, and 500 mg/kg were administered to 3 groups for 14 days. The positive control group was administered 5 mg/kg of glibenclamide. The negative and normal control groups were administered distilled water. To determine fasting blood glucose, blood was drawn on days 0, 1, 3, 5, 7, and 14 while it was drawn on days 0 and 14 for the determination of lipids. Phytochemical screening revealed the presence of flavonoids, saponins, tannins, cardiac glycosides, alkaloids and steroids. L. edulis diabetic positive control groups showed significant (P < 0.05) dose dependent reductions in fasting blood glucose levels. When day 0 mean blood glucose levels were compared to day 3 mean blood glucose levels of their respective groups, the 300 mg/kg L. edulis group showed a 23.3% drop and the 500 mg/kg L. edulis group showed a 52.6% drop. The 100 mg/kg L. edulis diabetic positive control group showed a 25.1% drop by day 5, the day on which it showed statistical significance (P < 0.05) compared to the diabetic control. In addition, administration of aqueous extracts of L. edulis to diabetic rats for 14 days significantly decreased (P < 0.05) the levels of serum total cholesterol, triglycerides, Low Density Lipoprotein (LDL) and Very Low Density Lipoprotein (VLDL) whilst increasing the levels of High Density Lipoprotein (HDL), when compared to the diabetic control group. It was concluded that L. edulis showed significant and dose dependent antihyperglycemic and antihyperlipidemic effects thus confirming its traditional use.