Mannosylated liposomes for targeted gene delivery

nnosylated liposomes for targeted gene delivery Original Research (2847) Total Article Views Authors: Kong F, Zhou F, Ge L, Liu X, Wang Y. Published Date February 2012 Volume 2012:7 Pages 1079 - 1089 DOI: http://dx.doi.org/10.2147/IJN.S29183 Received: 14 December 2011 Accepted: 12 January 2012 Published: 22 February 2012 Fansheng Kong1, Fang Zhou1, Linfu Ge1, Ximin Liu1, Yong Wang2 1Department of Hematology, 2Department of Rehabilitation and Physiotherapy, General Hospital of Ji'nan Command, PLA, Ji'nan, People's Republic of China Background: Liposomes can be modified with different ligands to control their biological properties, such as longevity, targeting ability, and intracellular penetration, in a desired fashion. The aim of this study was to modify liposomes with a novel mannosylated polyethylene glycol-phosphatidylethanolamine (M-PEG-PE) ligand to achieve active targeted gene delivery. Methods: Rat Kupffer cells were isolated and used as model cells for in vitro evaluation of cytotoxicity and transfection efficiency. The modified liposomes were intravenously injected into the rats, and Kupffer cells were isolated and analyzed by flow cytometry for in vivo gene delivery and expression. Results: The M-PEG-PE-modified liposome-enhanced green fluorescence protein plasmid (M-PEG-PE-Lipo-pEGFP) complexes had a particle size of 237 nm and a loading efficiency of 90%. The M-PEG-PE-Lipo-pEGFP complexes displayed remarkably higher transfection efficiency than unmodified Lipo-pEGFP, both in vitro (51%–30%) and in vivo (43%–27%). Conclusion: M-PEG-PE could function as an excellent active targeting ligand, and M-PEG-PE-modified liposomes could be promising active targeted drug delivery vectors.