摘要
以生物可降解聚羟基丁酸酯和羟基戊酸酯的共聚物(PHBV)、乙交酯和丙交酯的无规共聚物(PLGA)两种高分子作为壁材,采用复乳溶剂挥发法,制备了包裹硫酸庆大霉素(GS)的载药微球。在扫描电镜下观察到所得微球表面呈多孔状,为球形或椭圆形,粒径在20-80μm。分析结果表明,包封率在60%以上,在体外16-20d内药物全部释放,90d微球体外降解50%左右。
Biodegradable poly ( hydroxybutyrate-hydroxyvalerate)-poly (lactide-co-glycolide) ( PHBV- PLGA) microspheres with gentamicin-loading were prepared and characterized by solid-oil-oil-water method. The diameter of the microspheres with spherical or ellipsoidal shape ranges in 20- 80 /zm and the encapsulation efficiency of gentamicin sulfate is more than 60~//00. The cumulative rate of drug-release reaches 100~ in 16--20 d. In addition, the degradation properties are investigated. The cumulative drug release is about 50% in 90 d in phosphate buffer solution.
出处
《功能高分子学报》
CAS
CSCD
北大核心
2009年第1期12-16,共5页
Journal of Functional Polymers
基金
广东省自然科学基金项目(04205786)
国家科技支撑计划项目(2006BAI16B03)