Characterization and anti diabetic effects of the oligosaccharide fraction isolated from Rosa canina in STZ Induced diabetic rats.
Diabetes mellitus is the most common metabolic disorder characterized by chronic hyperglycemia. There has been a surge of research studies aiming to use natural products in the management of diabetes. The objective of this study was to isolate and characterize the structure and anti diabetic mechanisms of the main ingredient from Rosa canina. The oligosaccharide was isolated from Rosa canina fruits and characterized by a combination of FTIR, NMR and Mass spectrometry. Wistar rats were divided into negative control, diabetic (type 2) isolated oligosaccharide (IO) treated diabetic and positive diabetic controls. Oral glucose tolerance, gluconeogenesis and a glucosidase inhibitory tests as well as immunohistochemistry and quantitative real time PCR were performed to elucidate the molecular anti diabetic mechanisms of IO. Structural analyses confirmed the oligosaccharide structure of isolated fraction. Gluconeogenesis and a glucosidase activity were inhibited by IO in diabetic rats. The oral glucose tolerance test was improved significantly in the group treated with the IO (P 0.05) Pancreatic b cells and tissue pathological examination showed a significant improvement after the treatment period. In addition, the expression of Ngn3, Nkx6.1 and insulin increased in oligosaccharide treated compared to untreated diabetic rats. Owing to the verified anti diabetic effects and regenerative potential, isolated oligosaccharide could be considered as the promising drug in the management of diabetes.
Carbohydrate research