壳聚糖药物微球载体研究进展

壳聚糖是仅次于纤维素的天然多糖,因表面电荷密度高,毒副作用小,可生物降解,生物相容性好,兼具有强的生物粘附作用,使其在药物载体中具有独特的优势。主要介绍了壳聚糖微球作为药物载体常用的制备方法、释药特性、影响因素,以及在药物应用中的最新研究进展;指出了其在商品化方面亟须解决的问题。

Application of chitosan microspheres as a potential carrier for drugs

Chitosan is a biodegradable natural polymer with great potential for pharmaceutical applications due to its biocompatibility,high charge density,non-toxicity and mucoadhesion.It has been shown that it not only improves the disolution of poorly soluble drugs but also exerts a significant effect on fat metabolism in the body.Gel formation can be obtained by interactions of chitosans with low molecular counterions such as polyphosphates,sulphates and crosslinking with glutaraldehyde.This review is an insight into the exploitation of the various properties of chitosan to microencapsulate drugs.Various techniques used for preparing chitosan microspheres and evaluation of these microspheres have also been reviewed.This review also includes the factors that affect the entrapment efficiency and release kinetics of drugs from chitosan microspheres.