Abstract
Ocimum gratissimum (OG) has been used in ethnopharmacology for the treatment of diabetes. The aim of the study was to evaluate the effect of Ocimum gratissimum leaf-extract on hematological indices and lipid profile of Streptozotocin-induced diabetic Wistar rats. Twenty-four rats weighing 100-160 g were randomly assigned to four treatment groups, the normal and diabetic controls, received a placebo treatment, while groups three and four were administered glibenclamide and OG leaf-extract (400 mg kg-1 b.wt.), respectively. The extracts were administered twice daily for 28 days. The rats were sacrificed and whole blood was collected for hematological and serum lipid profile assays. Data were analyzed using one-way ANOVA. Diabetes induction resulted in decreases (p<0.05) in Red Blood Cell (RBC), Hemoglobin (Hb), White Blood Cell (WBC) and increases in Mean Corpuscular Hemoglobin and Blood platelets compared to the normal control. Treatment with O. gratissimum extract reversed RBC (7.74±0.39 μL), WBC (16.57±3.02) and Platelet (804.33±194.02) levels, but not Hb, towards normal levels (7.99±0.04, 11.27±0.69, 839.67±10.17 respectively). Diabetes induction also resulted in increases (p<0.05) in Triglyceride (TG) and Very-Low-Density Lipoprotein (VLDL), decreases (p<0.05) in High-Density Lipoprotein (HDL) and Low-Density Lipoprotein (LDL) compared to normal control with no significant change in Total Cholesterol (TC). After administration with Ocimum gratissimum TC, LDL and VLDL and HDL levels were significantly (p<0.05) reduced relative to the diabetic control. TG was however increased relative to the diabetic control. Overall, data suggests the plant holds great potential in amelioration of diabetes-induced dyslipidemia and hematological disorders.
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