甘氨酸螯合铁脂质体制备及其体外释放的研究

为提高甘氨酸螯合铁的稳定性,采用薄膜-超声法制备了甘氨酸螯合铁脂质体。以包封率为指标,考察了胆固醇、芯材、吐温80的量和水相体积对脂质体的影响,得到了最佳的工艺条件为:胆固醇:芯材:吐温80:大豆卵磷脂=0.2:0.1:0.5:1(wt.:wt.:wt.:wt.),水相体积10mL;最大包封率为63.92%。体外释放结果显示,经过5h,脂质体在模拟胃液和模拟肠液中的释放率分别为24.05%和15.35%;因而,脂质体对芯材甘氨酸螯合铁有较好的保护及缓释效果。

Preparation of ferrous glycinate liposomes and its in vitro release

To enhance the stability of ferrous glycinate,ferrous glycinate liposomes were prepared by thin film-sonication method.The effects of cholesterol,ferrous glycinate,Tween 80,and the volume of aqueous phase on the encapsulation efficiency of liposomes were investigated.The optimized technique parameters were obtained:cholesterol:ferrous glycinate:Tween 80:soybean phosphatidylcholine(SPC)=0.2:0.1:0.5:1,the volume of aqueous phase 10 mL.The encapsulation efficiency was 63.92% under the conditions of optimized technique parameters.Ferrous glycinate liposomes showed an acceptable stability in simulated gastrointestinal juice for 5 h.According to the results,ferrous glycinate was effectively protected by liposomes.