资源描述:
《peg-plga多孔载药微球制备因素的优化》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、PEG-PLGA多孔载药微球制备因素的优化袁晓明(安徽省宿州市食品药品检验所安徽宿州234000)【摘要】目的:研究乙交酯-丙交酯-聚乙二醇(PEG-PLGA)载药微球制备因素对外观形态、载药量和毡封率的影响,制备符合要求的多孔载药微球。方法:以乙交酯(GA)、L-丙交酷(LA)和聚乙二醇(PEG)为原料制备PEG-PLGA;以二氯甲烷为有机相,用W/O/W复乳法制备包封伊文思蓝的PEG-PLGA多孔载药微球。以微球外观形态、载药量和毡封率为参考指标,对制备因素温度、聚合物浓度和聚合物各组分摩尔比进行优化。结果:优化条件后最佳组合:温度40°C(二氯甲烷的沸点),浓度为75mg/ml,聚合物
2、各组分摩尔比为63/27/10。此时微球为多孔结构,成球规整,孔隙均匀,载药量和包封率相对较高,分别为0.38%和32.41%。结论:制备温度、聚合物浓度和聚合物各组分摩尔比对载药微球的外观形态、载药量和伍封率有较大影响。【关键词】乙交酯-丙交酯-聚乙二醇;载药微球;制备因素;优化【中图分类号】R97【文献标识码】A【文章编号】2095-1752(2015)32-0382-03OptimizationofpreparationfactorsforPEG-PLGAdrug-loadedmicrosphereYUANXiao-ming(SuzhouInstituteForFoodandDrugC
3、ontrol,Suzhou,Anhui,234000)【Abstract】ObjectiveTostudytheeffectofpreparationfactorsofglycolide-lactide-polyethyleneglycol(PEG-PLGA)carrierdrugmicrosphereontheappearanceform,drugloadingsandentrapmentefficiency,tomeettherequirementsofpreparingporouscarrierdrugmicrosphere.MethodsPEG-PLGAwaspreparedwith
4、therawmaterialofglycolide(GA),L-lactide(LA)andpolyethyleneglycol(PEG).Withtheorganicphaseofdichloromethane,W/O/WmultipleemulsionwasusedtoprepareEvansblueporousdrug-loadedmicrosphereencapsulatedbyPEG-PLGA.Usingappearanceform,drugloadingsandentrapmentefficiencyasreferenceparameters,thefactorsofprepar
5、ationtemperature,polymerconcentrationandcomponentmolarratiowereoptimized.ResultsAfteroptimization,bestcombination:temperature40°C(theboilingpointofdichloromethane),theconcentration-75mg/ml,polymercomponentsmolarratio-63/27/10.Atthemoment,microsphereshadporousstructure,regularballneat,uniformpore,hi
6、gherdrugloadingsanddrug-loadingrate,whichwere0.38%and32.41%respectively.ConclusionPreparationtemperature,polymerconcentrationandcomponentmolarratiohaveagreatinfluenceonappearanceform,drugloadingsandentrapmentefficiencyofdrug-loadedmicrosphere.【Keywords】Glycolide-lactide-polyethyleneglycol;Drug-load
7、edmicrosphere;Preparationfactors;Optimization近年来,载药微球作为•一种新型给药体系已成为研究的热点,可通过对药物载体进行物理或化学性质修饰,达到控释和靶向释放的0的,提高疗效和药物稳定性,减少给药次数和用药量,降低药物毒副作用[1-3]。在聚乙交酯-丙交酯(PLGA)中加入亲水性的聚乙二醇(PEG),形成两亲性的三嵌段聚合物PEG-PLGA,大大改善了聚合物的亲水