月桂酸二乙醇酰胺修饰利福喷丁脂质体的制备、性质及肺部给药

Preparation,characterization,and pulmonary delivery of rifapentine liposomes modified by lauric diethanolamide

目的 制备表面活性剂修饰利福喷丁（RIF）脂质体，进行该脂质体水化性能、载药量、释药速度和肺部给药研究。方法 采用薄膜超声法制备利福喷丁脂质体，比较月桂酸二乙醇酰胺（LDEA），Tween80和azone修饰利福喷丁脂质体的形态、包封率、释药速度和离体猪肺膜透过性，通过纤支镜进行肺部给药研究。结果 RIF-LDEA脂质体粒径在15～50nm，包封率为83．0％，表观透膜系数Kp为44.29；LD50为675mg·kg^-1。结论 LDEA修饰使利福喷丁脂质体的载药量增加1倍、释药速度的可调性强及安全性好。经纤支镜介导灌注给药治疗肺内膜结核的效果显著。

Aim To prepare rifapentine （RIF） liposomes modified by surfactants for studying their the water-solubility, drug loading effeciency, release rate and pulmonary drug delivery. Methods The film method was used to prepare RIF liposomes. Of verious RIF liposomes morphology by lauric diethanolamide （LDEA）, Tween 80 and azone, the properties were studied, envolving morphology, entrapment drug release rate and dissected lung-membrance penetration rate of swine. Pulmonary delivery study was carried out through bronchoscope. Results The particle size of RIF-LDEA liposomes was between 15 -50 nm. The top entrapment efficiency reached 83.0%. The apparent coefficient of membrane penetration （Kp） was 44.29. LD50 was 675 mg·kg^-1 by iv. Conclusion LDEA increased the water-solubility, loading effeciency and release rate of RIF liposomes. The prepared RIF-LDEA liposomes were suitable for the treatment of pulmonary tubrculosis through bronchoscope.