Desenvolvimento e avaliação de biofilmes conjugados de quitosana e quitosana/insulina.

Abstract

Diabetes Melittus appears as a worldwide epidemic, as the most frequent disorder that involves the metabolism of carbohydrates and is characterized by the increased rate of glucose in the blood, called hyperglycemia. It is a disease resulting from the lack of production or the deficit action of insulin. Its treatment is insulin therapy. Works using the Chitosan as carrier of insulin are considered promising as an alternative to the route of administration. Chitosan is a natural polysaccharide, biocompatible and biodegradable. In this context, the present study aimed to develop and evaluate conjugated Chitosan and Chitosan biofilms/insulin. The Biofilms were developed by dip-coating method and characterized by x-ray Diffraction (DRX), Spectroscopy in the region of Fourier transform infrared (FTIR), Optical Microscopy(MO), Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy/x-ray (EDS) and Wettability by Measuring Contact Angle. The technique of DRX demonstrated change in character of biodegradable thermoplastic Chitosan with the presence of insulin. With FTIR, the interaction between Chitosan and insulin was identified. It was possible to realize, through techniques of MO and MEV, change in morphology of membrane containing insulin when compared to pure Chitosan, with the presence of granular particles of varying sizes. The chemical elements already present in Chitosan and insulin were detected by EDS technique and, in the testing of surface tension, it was possible to observe an increase in the hydrophilic character of the biofilms containing insulin in comparison to those of pure Chitosan. Based on the results obtained, it is concluded that there is evidence of the incorporation of insulin to the biofilm of Chitosan indicating possibilities for use in less invasive treatments in the future.