Preparation, Characterization, and In Vitro Evaluation of Lipidoid-Polymer Hybrid Nanoparticles for siRNA Delivery to the Cytosol.

Preparation, Characterization, and In Vitro Evaluation of Lipidoid-Polymer Hybrid Nanoparticles for siRNA Delivery to the Cytosol. Methods Mol Biol. 2019;1943:141-152 Authors: Thanki K, Zeng X, Foged C Abstract RNA interference (RNAi) therapeutics are one of the most promising biological interventions in the efficient management of difficult-to-treat diseases. RNAi is mediated by small interfering RNA (siRNA), which induces specific and highly potent gene silencing. However, intracellular delivery of exogenous, chemically synthesized siRNA to the RNAi pathway in the cytosol remains a challenge, and is fully dependent on technologies that can facilitate cytosolic delivery without undesired side effects. One example is a novel delivery system referred to as lipidoid-polymer hybrid nanoparticles (LPNs), which we recently showed mediates highly efficient and safe gene silencing. Here we describe a double emulsion solvent evaporation method for the preparation of siRNA-loaded LPNs and methodologies employed for their physicochemical characterization and biological performance. A solution of siRNA in aqueous buffer is emulsified by sonication with an organic phase containing lipid and polymer into a primary emulsion. Subsequently, the primary emulsion is emulsified with a secondary water phase containing polyvinyl alcohol by sonication, and the organic phase is evaporated, eventually resulting in LPNs. The physicochemical characterization ...
Source: Mol Biol Cell - Category: Molecular Biology Authors: Tags: Methods Mol Biol Source Type: research