Bypassing Multidrug Resistance in Cancer Cells with Biodegradable Polymer Capsules

Biodegradable polymer capsules with drug-loaded multilayers were prepared through click chemistry via layer-by-layer assembly. The capsules can efficiently release incorporated drug by intracellular enzymatic degradation in both sensitive and resistant colorectal cancer cells in vitro. Endocytosis of drug-loaded capsules leads to bypass of Pgp-mediated multidrug resistance in cancer cells.