Most lipid formulations need cholesterol for efficient transfection, but the precise motivation remains unclear. Here, we have investigated the effect of cholesterol on the transfection efficiency (TE) of cationic liposomes made of l, 2-dioleoyl-3-trimethylammonium-propane (DOTAP) and dioleoylphosphocholine (DOPC) in Chinese hamster ovary cells. The transfection mechanisms of cholesterol-containing lipoplexes have been investigated by TE, synchrotron small angle X-ray scattering (SAXS) and laser scanning confocal microscopy (LSCM) experiments. We prove that cholesterol-containing lipoplexes enter the cells using different endocytosis pathways. Formulations with high cholesterol content efficienlty escape from endosomes. These studies will contribute to the rational design of novel lipid nanocarriers with superior TE.

Effect of cholesterol on the transfection efficiency of DOTAP-containing lipoplexes

Cardarelli, Francesco;Salomone, Fabrizio;
2013

Abstract

Most lipid formulations need cholesterol for efficient transfection, but the precise motivation remains unclear. Here, we have investigated the effect of cholesterol on the transfection efficiency (TE) of cationic liposomes made of l, 2-dioleoyl-3-trimethylammonium-propane (DOTAP) and dioleoylphosphocholine (DOPC) in Chinese hamster ovary cells. The transfection mechanisms of cholesterol-containing lipoplexes have been investigated by TE, synchrotron small angle X-ray scattering (SAXS) and laser scanning confocal microscopy (LSCM) experiments. We prove that cholesterol-containing lipoplexes enter the cells using different endocytosis pathways. Formulations with high cholesterol content efficienlty escape from endosomes. These studies will contribute to the rational design of novel lipid nanocarriers with superior TE.
2013
Nanotechnology 2013: Bio Sensors, Instruments, Medical, Environment and Energy - 2013 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2013
Washington, DC, usa
2013
Technical Proceedings of the 2013 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2013
9781482205862
Cationic liposome; Cholesterol; Confocal microscopy; Lipoplexes; Transfection efficiency; Biotechnology
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11384/73596
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