首页> 外文期刊>Journal of Microencapsulation: Microcapsules Liposomes Nanoparticles Microcells Microspheres >Preparation and evaluation of PLGA mieroparticles as carrier for the pulmonary delivery of rhIL-2:I. Effects of some formulation parameters on microparticle characteristics
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Preparation and evaluation of PLGA mieroparticles as carrier for the pulmonary delivery of rhIL-2:I. Effects of some formulation parameters on microparticle characteristics

机译:PLGA微颗粒作为载体用于肺内递送rhIL-2:I的制备和评估。某些配方参数对微粒特性的影响

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摘要

In this study, recombinant human interleukin-2 (rhIL-2) containing poly(lactic-co-glycolic acid) (PLGA) microparticles were prepared for pulmonary administration by modified w/o/w double emulsion solvent extraction method and the effects of various formulation parameters on the physicochemical properties of the microparticles were investigated. Mieroparticles in suitable size for pulmonary administration (4.02 μm) were obtained by increasing dichloromethane volume used in the organic phase. Also, a very high encapsulation efficiency (99.22%) value could be reached in these mieroparticles. In the sodium dodecyl sulphate-polyacrylamide gel electrophoresis analysis, rhIL-2 extracted from mieroparticles having a similar band with native rhIL-2 showed that the protein was not affected by the encapsulation process. The release curves of mieroparticles exhibited a biphasic fashion, characterized by a fast release phase at initial 1 day, followed by a slower one on the remaining days. Bioactivity investigations using T cells show that rhIL-2 encapsulated in PLGA mieroparticles retain their biological activity.
机译:在这项研究中,重组人白细胞介素2(rhIL-2)包含聚(乳酸-乙醇酸)(PLGA)微粒制备了改进的w / o / w双乳剂溶剂提取方法用于肺部给药和各种效果研究了配方参数对微粒理化性质的影响。通过增加有机相中使用的二氯甲烷体积,获得了适合肺部给药的大小合适的微粒(4.02μm)。而且,在这些微粒中可以达到很高的封装效率(99.22%)。在十二烷基硫酸钠-聚丙烯酰胺凝胶电泳分析中,从具有与天然rhIL-2相似的条带的微粒中提取的rhIL-2表明,该蛋白质不受封装过程的影响。微粒的释放曲线表现出双相性,其特征在于在开始的第一天为快速释放阶段,随后在剩余的几天中为较慢的释放阶段。使用T细胞进行的生物活性研究表明,包裹在PLGA微粒中的rhIL-2保留了其生物活性。

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