Abstract
In this study, an oil-in-water (o/w) nanoemulsion is used to deliver siRNA targeting Twist1, a protein that contributes to tumor metastasis in a variety of cancers. The FDA-approved oil, medium chain triglycerides (MCT), is used as the hydrophobic phase for the nanoemulsion. The siRNA is paired with dioleoyl-3-trimethylammonium-propane (DOTAP) to form a hydrophobic salt that is soluble at high concentrations in MCT. The resulting MCT/siRNA-DOTAP solution is formulated into a nanoemulsion with an average particle size of 140 nm. The nanoemulsion displays long term stability over the course of 195 days. In an in vivo murine tumor model, the nanoemulsion facilitates a 46% decrease in Twist1 mRNA after 48 h.
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