【摘要】 目的:评价醋酸钙梯度法制备维A酸脂质体的可行性,并与薄膜法、逆相蒸发法进行质量比较。方法:采用薄膜法、逆相蒸发法和醋酸钙梯度法分别制备维A酸脂质体,用G-50葡聚糖凝胶柱分离,以紫外分光光度法和纳米激光粒度仪分别测定维A酸脂质体的包封率和粒径,以电子显微镜观察维A酸脂质体的形态。结果:以醋酸钙梯度法制备的维A酸脂质体包封率最高,达90.48%;其外观圆整均匀,平均粒径为35.8nm,4℃放置3mo质量稳定。结论:采用醋酸钙梯度法制备维A酸脂质体包封率较高,方法可行。更多还原

【Abstract】 OBJECTIVE:To evaluate the feasibility of preparing tretinoin liposome by calcium acetate gradient method and to compare this method with the microfilm and the antiphase evaporation method.METHODS:Tretinoin liposome was pre-pared by microfilm method,antiphase evaporation method and calcium acetate gradient method,respectively.Sephadex G-50was used for isolation and ultraviolet spectrophotometry was utilized to determine the entrapped efficiency and grain size of liposomal tretinoin.Electronmicroscope was applied to observe the shape of tretinoin liposome.RESULTS:The calcium ac-etate gradient technology achieved the highest entrapped efficiency of90.48%.The liposomes had perfect shape with the mean diameter of35.8nm and kept stable in quality at4℃for3months.CONCLUSION:The liposome with high entrapped effi-ciency could be prepared by calcium acetate gradient method,and the method is feasible.更多还原