Nihal M Elguindy, Doaa Awad, Amira Zaky and Nashwa Shabaan
Alexandria University, Egypt
Keynote: J Diabetes Metab
Curcumin, from the rhizomes of Curcuma longa, is characterized by its anti-diabetic and insulin -sensitizing activities. Curcumin has poor bioavailability that has been overcome in our research by using liposomes. This study aimed to measure the hepatic expression of glucose transporter-2 (GLUT-2) in high fat diet (HFD) induced type 2 diabetic rats, and to investigate the roles of liposomal curcumin in improving hepatic insulin resistance and glucose intolerance. In this study, we randomly divided Sprague-Dawley male rats into 6 groups: Control, high fat diet (HFD), treated HFD with oral curcumin (0.8 g/kg/3times/week), treated HFD with oral liposomal curcumin (0.03 g/kg/3times/week), treated HFD with subcutaneous liposomal curcumin (0.03 g/kg/3times/week) and treated HFD with interperitoneal liposomal curcumin (0.03 g/kg/3times/week). Level of gene expression of GLUT-2, diabetic profile parameters (fasting blood glucose level, serum insulin, HOMA-IR), rat weight, total cholesterol, triglyceride, HDL-C, LDL-C, liver function, kidney function, liver malondialdehyde, glutathione and catalase activity were measured in all groups. Feeding rats HFD for 8 weeks developed features of insulin resistance and type 2 diabetes. These features presented in decreased expression of GLUT-2 gene, increased body weight, hyperglycemia, hyperinsulinemia, hypercholesterolemia (with increased LDL-Cholesterol and decreased HDL-Cholesterol) and hypertriglyceridemia and decreased glutathione and activity of catalase. Curcumin (free and liposomal) treatment increased gene expression of GLUT-2, improved levels of diabetic profile parameters, lipid profile, liver and kidney function and decreased oxidative stress. Our results suggested that curcumin (especially liposomal) is a unique natural medicine against insulin resistance in type 2 diabetes mellitus in rats.
Nihal M Elguindy has completed her PhD from Duke University, USA and continued her work in faculty of science in Alexandria University, Egypt. She has more than 10 years experience in the feild of treating or preventing diseases like, liver cancer, diabetes and obesity using natural products.