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Design and characterization of calcium alginate microparticles coated with polycations as protein delivery system

机译:聚阳离子包覆的藻酸钙微颗粒作为蛋白传递系统的设计与表征

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摘要

Bovine serum albumin (BSA) loaded calcium alginate microparticles (MPs) produced in this study by a w/o emulsification and external gelation method exhibited spherical and fairly smooth and porous morphology with 1.052 ± 0.057 μm modal particle size. The high permeability of the calcium alginate hydrogel lead to a potent burst effect and too fast protein release. To overcome these problems, MPs were coated with polycations, such as chitosan, poly-L-lysine and DEAE-dextran. Our results demonstrated that coated MPs showed slower release and were able to significantly reduce the release of BSA in the first hour. Therefore, this method can be applied to prepare coated alginate MPs which could be an optimal system for the controlled release of biotherapeutic molecules. Nevertheless, further studies are needed to optimize delivery properties which could provide a sustained release of proteins.
机译:通过无乳化和外部凝胶化方法在此研究中生产的牛血清白蛋白(BSA)负载藻酸钙微粒(MPs)表现出球形,相当光滑和多孔的形态,模态粒径为1.052±0.057μm。海藻酸钙水凝胶的高渗透性导致有效的爆发效应和过快的蛋白质释放。为了克服这些问题,MP涂有聚阳离子,例如壳聚糖,聚L-赖氨酸和DEAE-葡聚糖。我们的结果表明,包被的MPs显示出较慢的释放,并且能够在第一小时内显着减少BSA的释放。因此,该方法可用于制备包被的藻酸盐MP,这可能是控制生物治疗分子释放的最佳系统。然而,需要进一步的研究来优化递送特性,以提供蛋白质的持续释放。

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