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The targeting properties of folate-conjugated Pluronic F127/poly (lactic-co-glycolic) nanoparticles.
International Journal of Biological Macromolecules 2017 December
Novel Folated Pluronic F127/poly (lactic-co-glycolic) (FA-F127-PLGA) and PLGA-F127-PLGA block copolymer were synthesized and nanoparticles self-assembled from these two copolymers were prepared by dialysis method. Paclitaxel (PTX) was successfully encapsulated in these two nanoparticles. According to in vitro release studies of PTX-loaded nanoparticles, after an initial burst release during the first 11h, the entrapped PTX released slowly in the following 82h. The cytotoxicity studies demonstrated that the in vitro antitumor effect of PTX could be improved by encapsulating PTX into PLGA-F127-PLGA nanoparticles. Moreover, folate-targeted FA-F127-PLGA nanoparticles were more effective than PLGA-F127-PLGA when delivering PTX in folate receptor overexpressing OVCAR-3 cells, which mainly due to the FA-receptor-meditated endocytosis. As the treatment time became longer, the targeting effects were more obvious. The targeting effect of FA-F127-PLGA nanoparticles was also investigated in vitro by measuring the cellular uptake of the nanoparticles. The results showed that FA-F127-PLGA nanoparticles were more easily to be uptaken by OVCAR-3 cells in comparison with PLGA-F127-PLGA nanoparticles. In vivo pharmacokinetic studies indicated that FA-F127-PLGA nanoparticles prolong the circulation time of PTX in plasma, and delay the blood clearance of PTX. These results indicated that Folated FA-F127-PLGA could be a potential carrier in long-term PTX delivery.
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