Abstract
Herein, we report a facile strategy to prepare supported lipid-bilayer-coated polyacrylic acid/calcium phosphate nanoparticles (designated as PAA/CaP@SLB NPs) as a new dual pH-responsive drug-delivery platform for cancer chemotherapy. The synthesized PAA/CaP NPs exhibited both a high payload of doxorubicin (DOX) and dual pH-responsive drug-release properties. Additionally, the coated lipid bilayer had the ability to enhance the cellular uptake of PAA/CaP NPs without affecting the pH-responsive drug release. Moreover, the blank PAA/CaP@SLB NPs exhibited excellent biocompatibility and the DOX-loaded PAA/CaP@SLB NPs markedly increased the cellular accumulation of DOX and its cytotoxic effects on HepG-2 cells. Furthermore, when used to evaluate the in vivo therapeutic efficacy in mice with the hepatocarcinoma cell line (H-22), the DOX-loaded PAA/CaP@SLB NPs exhibited superior inhibition of tumor growth compared with the free DOX group. Thus, PAA/CaP@SLB NPs are a promising drug-delivery vehicle to increase the therapeutic efficacy of anticancer drugs.
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