Virus Mimetic Framework DNA as a Non-LNP Gene Carrier for Modulated Cell Endocytosis and Apoptosis

Abstract

Mimicking the size and shape of spherical viruses, we constructed a soccer-ball shaped virus-inspired DNA origami (ViDO) framework as a programmable non-LNP (lipid nanoparticle) gene carrier. The DNA framework was decorated with precisely controlled recognition molecules outside and loaded with adequate genetic molecules inside. Five variants were constructed to systematically investigate their cell uptake and modulated gene silencing efficiency. Cellular uptake was enhanced with an increasing number of aptamers, while with a median number of aptamer supply, dispersed distribution performed better than the clustered pattern. Intriguingly, the transfection efficiency was maximized using the ViDO with clustered five aptamers, which exhibited a competitive RNA silencing effect induced by Lipo2000 with low cytotoxicity. Our results revealed the effects of aptamer distribution patterns on endocytosis and transfection, thus providing a programmable platform for meticulous optimization of the gene delivery system.