Abstract

PEGylated polycation/DNA micellar nanoparticles have been developed that can undergo shape transformation upon cleavage of the PEG grafts in response to an environmental cue. As a proof-of-principle, DNA nanoparticles with higher PEG grafting density adopting long, worm- and rod-like morphologies, transition to more condensed nanoparticles with spherical and short-rod morphologies upon cleavage of a fraction of the PEG grafts from the copolymer. This shape transformation leads to increased surface charges, correlating with improved transfection efficiency.

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