Abstract
A polymeric polyethylenimine (PEI)-based prodrug of anticancer doxorubicin (DOX) (PEI-hyd-DOX) was designed by attaching DOX to PEI via an acid-labile hydrazone bond, for the achievement of biocontrollable gene and drug co-delivery in response to the intracellular acid microenvironments in the late endosome/lysosome compartments. The cytotoxicity of PEI-hyd-DOX was evaluated by the MTT assay and the cellular uptake was monitored using confocal laser scanning microscopy. The polymeric prodrug can respond with a high sensitivity to the specific acid condition inside cells, thus permitting the precise biocontrol over intracellular drug liberation with high drug efficacy. The chemical attachment of drug molecules also led to the relatively reduced toxicity and the enhanced transfection efficiency compared with parent PEI. The resulting data adumbrated the potential of PEI-hyd-DOX to co-deliver DOX and therapeutic gene for the combination of chemotherapy and gene therapy.
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Jia, H., Chen, S., Zhuo, R. et al. Polymeric prodrug for bio-controllable gene and drug co-delivery. Sci. China Chem. 59, 1397–1404 (2016). https://doi.org/10.1007/s11426-016-0230-9
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DOI: https://doi.org/10.1007/s11426-016-0230-9