The aim of this study was to prepare and characterize an innovative hepatocellular carcinoma-targeted therapeutic drug\ndelivery system based on folate-PEG-mesoporous silica nanoparticles (FA-PEG-MSNs) loaded with paclitaxel (PTX). In vitro cell\nexperiments and an in vivo antitumor efficacy study demonstrated that FA-PEG-MSNs-PTX produced significantly higher tumor\ninhibition compared with pure PTX and mesoporous silica nanoparticles loaded with paclitaxel (MSNs-PTX). The biodistribution\ninvestigation of PTX in nude mice revealed that the FA-PEG-MSNs-PTX could accumulate in tumors. Folic acid functionalized\nMSNs resulted in a good targeting effect, confirming that FA-PEG-MSNs-PTX is a promising tumor-targeted drug delivery system\nfor liver cancer chemotherapy.
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