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Type and composition of surfactants mediating gene transfection of polyethylenimine-coated liposomes

Authors Opanasopit P, Paecharoenchai O, Rojanarata T, Ngawhirunpat T, Ruktanonchai U

Published 10 May 2011 Volume 2011:6 Pages 975—983

DOI https://doi.org/10.2147/IJN.S18647

Review by Single-blind

Peer reviewer comments 4

Praneet Opanasopit1, Orapan Paecharoenchai1, Theerasak Rojanarata1, Tanasait Ngawhirunpat1, Uracha Ruktanonchai2
1
Faculty of Pharmacy, Silpakorn University, Nakhon Pathom, 2National Nanotechnology Center, Thailand Science Park, Pathumthani, Thailand

Background: The objective of this study was to compare the transfection efficiency of anionic liposomes coated with polyethylenimine (PEI) with that of PEI and Lipofectamine 2000TM using the plasmid DNA encoding green fluorescent protein in a human hepatoma (Huh7) cell line.
Methods: Factors affecting transfection efficiency, including type of surfactant, ratio of phosphatidylcholine (PC)/surfactant, carrier/DNA weight ratio, and the presence of serum have been investigated. Anionic liposomes, composed of PC and anionic surfactants, ie, sodium oleate (NaO), sodium taurocholate (NaT), or zwitterionic surfactant (3-[{3-cholamidopropyl}-dimethylammonio]-1-propanesulfonate, CHAPS) at molar ratios of 10:1, 10:1.5, and 10:2 were prepared by the sonication method. Subsequently, they were coated with PEI to produce polycationic liposomes (PCL).
Results: PCL was able to condense with pDNA depending on the PCL/DNA weight ratio. PCL composed of PC:NaO (10:2) showed higher transfection efficiency than NaT and CHAPS at all weight ratios tested. Higher transfection efficiency and gene expression were observed when the carrier/DNA weight ratio increased. The highest transfection efficiency was found at a weight ratio of 0.5.
Conclusion: This PCL showed remarkably high transfection efficiency with low cytotoxicity to Huh7 cells in vitro, in comparison with PEI and Lipofectamine 2000.

Keywords: polycation liposomes, polyethylenimine, gene delivery, transfection efficiency

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