目的:优选山药总多糖脂质体的处方工艺并对其进行表征,为该有效部位的开发提供参考。方法:采用逆向蒸发-微孔滤膜挤压法制备山药总多糖脂质体。以卵磷脂质量浓度、卵磷脂与胆固醇比例、药脂比为考察因素,包封率为评价指标,采用L9(34)正交试验设计优选处方。利用苯酚-硫酸法测定山药总多糖含量,高速离心法测定山药总多糖脂质体的包封率。结果:山药总多糖脂质体的最佳处方工艺为卵磷脂-胆固醇(6∶1),卵磷脂质量浓度12 g·L~(-1),药脂比1∶15;包封率和载药量分别为83.29%,3.83%,平均粒径121.6 nm,多分散指数平均值0.136,平均Zeta电位-31.8 m V。结论:优选的处方工艺稳定可行、重复性好。制备的山药总多糖脂质体形态圆整、粒径分布均匀、包封率较高。
【英文摘要】
Objective: To optimize formulation process of Dioscoreae Rhizoma polysaccharide liposomes and investigate its characterization. Method: The liposomes was prepared by the reverse evaporation-microporous membrane extrusion method. Taking lecithin concentration,ratio of lecithin to cholesterol and ratio of drug to lipid as factors,orthogonal test was adopted to optimize formulation process with entrapment efficiency as index. Highspeed centrifugation was developed for determination of entrapment efficiency. Th...
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