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Open AccessArticle

Novel Cholesterol-Based Cationic Lipids as Transfecting Agents of DNA for Efficient Gene Delivery

Department of Pharmaceutics, School of Pharmacy, Fourth Military Medical University, Xi'an 710032, China
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editor: Bing Yan
Int. J. Mol. Sci. 2015, 16(3), 5666-5681;
Received: 12 January 2015 / Revised: 29 January 2015 / Accepted: 13 February 2015 / Published: 11 March 2015
(This article belongs to the Special Issue Biomaterials for Tissue Engineering)
The design, synthesis and biological evaluation of the cationic lipid gene delivery vectors based on cholesterol and natural amino acids lysine or histidine are described. Cationic liposomes composed of the newly synthesized cationic lipids 1a or 1b and neutral lipid DOPE (1,2-dioleoyl-l-α-glycero-3-phosphatidyl-ethanolamine) exhibited good transfection efficiency. pEGFP-N1 plasmid DNA was transferred into 293T cells by cationic liposomes formed from cationic lipids 1a and 1b, and the transfection activity of the cationic lipids was superior (1a) or parallel (1b) to that of the commercially available 3β-[N-(N',N'-dimethylaminoethyl)-carbamoyl] cholesterol (DC-Chol) derived from the same cholesterol backbone with different head groups. Combined with the results of agarose gel electrophoresis, transfection experiments with various molar ratios of the cationic lipids and DOPE and N/P (+/−) molar charge ratios, a more effective formulation was formed, which could lead to relatively high transfection efficiency. Cationic lipid 1a represents a potential agent for the liposome used in gene delivery due to low cytotoxicity and impressive gene transfection activity. View Full-Text
Keywords: cholesterol; cationic liposome; lysine; histidine; synthesis cholesterol; cationic liposome; lysine; histidine; synthesis
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Ju, J.; Huan, M.-L.; Wan, N.; Qiu, H.; Zhou, S.-Y.; Zhang, B.-L. Novel Cholesterol-Based Cationic Lipids as Transfecting Agents of DNA for Efficient Gene Delivery. Int. J. Mol. Sci. 2015, 16, 5666-5681.

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