贝伐单抗多囊脂质体的处方优化及体外释放特性研究
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篇名: | 贝伐单抗多囊脂质体的处方优化及体外释放特性研究 |
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摘要: | 目的:制备具有缓释作用的贝伐单抗(BEV)多囊脂质体(BEV-MVLs),并对其体外释放特性进行研究。方法:采用复乳法制备BEV-MVLs,以有机相中三油酸甘油酯(TO)的浓度、1,2-二油酰基磷脂酰胆碱(DOPC)-胆固醇(CH)的比值(mol/mol)、外水相中L-赖氨酸的浓度为因素,以包封率为指标,采用Box-Behnken设计-响应面法对处方进行优化。采用倒置荧光显微镜和扫描电镜观察BEV-MVLs的形态,激光粒度仪测定其粒径,高效液相色谱法测定BEV含量并计算其包封率和体外累积释放度。结果:最优处方为有机相中TO 2.72 mmol/L、DOPC-CH比值0.67(mol/mol)、外水相中L-赖氨酸40 mmol/L。所制BEV-MVLs的包封率为(80.65±4.42)%(n=3),与预测值的相对误差为2.54%;脂质体外观呈球形,大小较均匀,为典型的非同心囊泡结构,平均粒径为16.80 μm;30 d的体外累积释放度约为92%。结论:成功制得具有缓释作用的BEV-MVLs,其包封率达到预期效果。 |
ABSTRACT: | OBJECTIVE: To prepare Bevacizumab (BEV) multivesicular liposomes (BEV-MVLs) with sustained-effect, and to study their in vitro release characteristics. METHODS: BEV-MVLs were prepared by double emulsion method. Box-Behnken design-response surface methodology was used to optimize the prescription with the concentration of glycerol trioleate (TO) in organic phase, ratio of 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC)-cholesterol (CH) (mol/mol), the concentration of L-lysine in external water phase as factors, using encapsulation rate as index. The morphology of BEV-MVLs was observed by inverted fluorescence microscope and SEM; particle size was determined by laser particle size analyzer; the BEV content was determined by HPLC and calculate the encapsulation rate and in vitro accumulative release rate. RESULTS: The optimized prescription was as follows as TO of 2.72 mmol/L in organic phase, DOPC-CH ratio of 0.67 (mol/mol) and L-lysine of 40 mmol/L in external water phase. The encapsulation rate of BEV-MVLs was (80.65±4.42)% (n=3), and relative error of it to predicted value was 2.54%. The liposomes were spherical in appearance shape and uniform in size, and they were typical non-concentric vesicle structure with average particle size of 16.80 μm. 30 d in vitro accumulative release rate was about 92%. CONCLUSIONS: Prepared BEV-MVLs show sustained-effect, and their encapsulation rate reaches the expected effect. |
期刊: | 2018年第29卷第7期 |
作者: | 王毅云,慕宏杰,华红臣,姜莹,孟庆庆,王爱萍,刘沙,孙考祥 |
AUTHORS: | WANG Yiyun,MU Hongjie,HUA Hongchen,JIANG Ying,MENG Qingqing,WANG Aiping,LIU Sha,SUN Kaoxiang |
关键字: | 贝伐单抗;多囊脂质体;复乳法;Box-Behnken设计-响应面法;处方优化;体外释放 |
KEYWORDS: | Bevacizumab; Multivesicular liposomes; Double emulsion method; Box-Behnken design-response methodology; Formulation optimization; in vitro release |
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