Dual Responsive, Stabilized Nanoparticles for Efficient In Vivo Plasmid Delivery

Virus-Inspired Polymer for Efficient In Vitro and In Vivo Gene Delivery

Clinical translation of nucleic acids drugs has been stunted by limited delivery options. Herein, we report a synthetic polymer designed to mimic viral mechanisms of delivery called VIPER (virus-inspired polymer for endosomal release). VIPER is composed of a polycation block for condensation of nucleic acids, and a pH-sensitive block for acid-triggered display of a lytic peptide to promote trafficking to the cell cytosol. VIPER shows superior efficiencies compared to commercial agents when delivering genes to multiple immortalized cell lines. Importantly, in murine models, VIPER facilitates effective gene transfer to solid tumors.

Intracellular microenvironment responsive polymers: a multiple-stage transport platform for high-performance gene delivery

A new strategy for promoting endoplasmic gene delivery and nucleus uptake is proposed by developing intracellular microenvironment responsive biocompatible polymers. This delivery system can efficiently load and self-assemble nucleic acids into nano-structured polyplexes at a neutral pH, release smaller imidazole-gene complexes from the polymer backbones at intracellular endosomal pH, transport nucleic acids into nucleus through intracellular environment responsive multiple-stage gene delivery, thus leading to a high cell transfection efficiency.