负载纳米粒子的壳聚糖单向缓释膜的制备及理化性质研究  

Preparation and characterization of nanoparticles in-loaded one-way release-controlled chitosan membrane

作　　者：李书仪 夏婷[1,2] 俞玫[1,2] 

机构地区：[1]中国医学科学院北京协和医学院生物医学工程研究所,天津300192 [2]天津市生物医学材料重点实验室

出　　处：《国际生物医学工程杂志》2014年第3期151-155,F0003,共6页International Journal of Biomedical Engineering

基　　金：天津市自然科学基金资助项目（10JCYBJC02500）;新老师基金资助项目（200800231142）

摘　　要：目的 将壳聚糖纳米粒子与壳聚糖单向缓释膜结合,制备得到负载纳米粒子的壳聚糖单向缓释膜,并对其理化性质及体外释放性能进行研究.方法 采用反相乳化法制备壳聚糖纳米粒子,采用流延法制备壳聚糖单向缓释膜,通过透射电镜、扫描电镜和粒度分析仪检测纳米粒子的形态、大小及壳聚糖单向缓释膜表面形貌,MTT法检测其生物相容性,荧光显微镜观察纳米粒子在壳聚糖单向缓释膜中的分布,体外释放实验检测单向缓释膜的缓释性能.结果 4种水溶性壳聚糖纳米粒子呈球状且粒径均一,其中类透明质酸壳聚糖纳米粒子平均粒径为（255.40±39.10） nm,具有最好的生物相容性及缓释性能.壳聚糖单向缓释膜外层膜致密,内层膜疏松,纳米粒子在内层膜中均匀分布,体外释放实验证明,壳聚糖单向缓释膜为单向释放,且具有较好的缓释性能.结论 包载纳米粒子的壳聚糖单向缓释膜具有较好的缓释和单向控释性能,在生长因子类药物载体方面有一定应用前景.Objective To prepare and characterize nanoparticles in-loaded one-way release-controlled chitosan membrane,and to explore the release-controlled rule of the film in vitro.Methods The chitosan nanoparticles were prepared by inverse crosslinking-emulsion method.The one-way release-controlled membrane was prepared by a casting method.Transmission electron microscope （TEM） was used to evaluate the morphological properties and particle size analyzer was used to analyze particle size distribution.The morphology of the membrane was inspected through scanning electron microscope （SEM）.MTT assay was applied to determine the biological safety of chitosan nanoparticles.The distribution of the nanoparticles was observed by fluorescence microscope.The in vitro release studies were adopted to evaluate the release-controlled rule.Results The four kinds of nanoparticles had spherical shapes and uniform particle size.The size of the hyaluronic acid-coated chitosan nanoparticle was （255.40±39.10） nm.Hyaluronic acid-coated chitosan nanoparticles showed the best property of sustained release and biocompatibility.The membrane had a loose inner layer and a dense outer layer,and the distribution of the nanoparticles was uniform in the inner layer of the membrane.The release of protein from membrane was unidirectional and the membrane displayed good controlled release property.Conclusions The nanoparticles in-loaded one-way release-controlled chitosan membrane presents good one-way sustained release performance.It is potentially useful in delivery system of growth factors.

关 键 词：生长因子 壳聚糖纳米粒子 壳聚糖膜 单向缓释 

分 类 号：R944[医药卫生—药剂学] TB383.1[医药卫生—药学]