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The loading and containment of cargo within nanoparticles and their efficient delivery to cells represent a primary challenge in nanomedicine. We report lipid exchange between free and mesoporous silica nanoparticle-supported lipid bilayers as an effective means of containing cargo, controlling charge, and directing delivery to mammalian cells. The delivery of a membrane-impermeable dye (calcein) and a chemotherapeutic drug (doxorubicin) are demonstrated. Exchanged lipid bilayers minimized premature drug release, and an overall positive charge on the supported lipid bilayer effected enhanced delivery.

journal of the american chemical society

Electrostatically Mediated Liposome Fusion and Lipid Exchange with a Nanoparticle-Supported Bilayer for Control of Surface Charge, Drug Containment, and Delivery