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• W2792537813 abstract "Non-viral vectors such as polymers and liposomes have been used as gene delivery systems to overcome intrinsic problems of viral vectors, but transfection efficiency of these vectors is lower than viral vectors. In the present study, we tried to design non-viral gene delivery vectors that mimic the viral vectors using the benefits of both cationic liposomes and cationic polymer vectors along with targeting glucocorticoid receptors to enhance cellular trafficking of vectors. Cationic liposomes containing DOTAP and cholesterol were prepared by thin-film hydration following extrusion method. Dexamethasone mesylate was synthesized and then conjugated to polyethylenimine through a one-step reaction. A novel gene delivery system, Lipopolyplex was developed by premixing liposome and different molecular weight of bPEI-Dexa as carriers followed by addition of plasmid at three different carrier/pDNA (C/P) weight ratios. The resulted complexes were characterized for their size, zeta potential and ability of DNA condensation. Transfection efficiency of vectors in neuro2A was determined by Luciferase reporter gene assay. Also, the toxicity of gene carriers was investigated in this cell line. Mean particle size of prepared complexes was less than 200 nm and there was no significant difference in their size by increasing the molecular weight of PEIs. All complexes had positive surface charge. Complete condensation of DNA was occurred at C/P ratio of one for all complexes. Lipopolyplexes were more efficient than polyplexes and lipoplexes alone and transfection efficiency was improved by adding dexamethasone. The complexes containing liposome, PEI 10 kDa and dexamethasone (PEI10:Lipo:Dexa(0.05)) had the highest transfection activity about 40-fold and 3.6-fold in comparison with PEI10 and PEI10:Lipo, respectively. Furthermore, the non-viral vectors described in this study showed low cytotoxicity. The results of this study confirmed that PEI in combination with liposome forms lipopolyplex with low toxicity and enhanced transfection efficiency. Moreover, using dexamethasone, in combination with lipopolyplex might be useful to increase the gene delivery potential of these lipopolyplexes." @default.
• W2792537813 created "2018-03-29" @default.
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• W2792537813 date "2018-05-01" @default.
• W2792537813 modified "2023-09-25" @default.
• W2792537813 title "Viral vector mimicking and nucleus targeted nanoparticles based on dexamethasone polyethylenimine nanoliposomes: Preparation and evaluation of transfection efficiency" @default.
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• W2792537813 doi "https://doi.org/10.1016/j.colsurfb.2018.02.043" @default.
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