Abstract

This study was carried out to evaluate the effects of ethanol extract of Azadirachta indica leaf on haematological parameters, lipid profile, body weight, organ weight and histopathological functions of streptozotocin-induced diabetic rats. Diabetes was induced by a single intraperitoneal administration of streptozotocin (50 mg/kg bw.). The haematological parameters, lipid profile and histopathological investigations were performed using standard methods. Continuous administration of ethanol extract of A. indica leaf for a period of four weeks significantly (p<0.05) increased the bodyweight of the streptozotocin-induced diabetic rats compared with the diabetic-untreated control. There was a significant (p<0.05) increase in the haemoglobin concentration, packed cell volume, red blood cells, platelet count and a significant (p<0.05) reduction in the total serum cholesterol, low-density lipoprotein, triglycerides and very-low-density lipoprotein of the groups treated with ethanol extract of A. indica compared with the diabetic-untreated control. The result of the histopathological studies showed regeneration of the organs for the groups treated with 400 mg/kg bw of the extract compared with the diabetic-untreated control. These results suggest that the ethanol extract of A. indica can be considered as an excellent remedy for diabetes and an alternative to antidiabetic drugs in reducing the complications associated with type II diabetes mellitus.

Key words: Diabetes, Azadirachta indica, haematological parameters, Lipid profile, Bodyweight, Histopathological functions.