Erythrocyte membrane based cationic polymer-mcDNA complexes as an efficient gene delivery system.

Gene therapy has great promise for the treatment of obtained and inherited serious diseases. However, the lack of safe and efficient gene delivery systems remains a barrier for their clinical application. Here, we reported a potential gene delivery vehicle composed of the erythrocyte membrane and cationic polymers, for example the XtremeGENE from Roche and the ε-caprolactone modified polyethylenimine. In addition to high efficiency, this system showed negligible cytotoxicity compared to the two cationic polymers alone in various cell lines, including human embryonic kidney cells (293T), human liver cancer cells (Huh7 and HepG2), murine dendritic cells (DC2.4) and human umbilical cord mesenchymal stem cells (Hu-MSCs). Moreover, the results of confocal laser scanning microscopy and flow cytometry suggested that the cell uptake of this gene vector was improved and might be introduced by the fusion interaction between the erythrocyte membrane and targeted cells.Thus, all the results revealed that the erythrocyte membrane based gene delivery system might be able to serve as an excellent gene delivery system.

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