Abstract
AbstractThe use of nanoparticle‐stabilized nanocapsules (NPSCs) for the direct cytosolic delivery of siRNA is reported. In this approach, siRNA is complexed with cationic arginine‐functionalized gold nanoparticles by electrostatic interactions, with the resulting ensemble self‐assembled onto the surface of fatty acid nanodroplets to form a NPSC/siRNA nanocomplex. The complex rapidly delivers siRNA into the cytosol through membrane fusion, a mechanism supported by cellular uptake studies. Using destabilized green fluorescent protein (deGFP) as a target, 90 % knockdown was observed in HEK293 cells. Moreover, the delivery of siRNA targeting polo‐like kinase 1 (siPLK1) efficiently silenced PLK1 expression in cancer cells with concomitant cytotoxicity.
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