ISSN:
1573-904X
Keywords:
gene transfer
;
lipid emulsions
;
poly(ethylene glycol)
;
transfection
;
cationic lipids
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract Purpose. To develop a non-viral gene delivery system in the form ofan oil-in-water (o/w) lipid emulsionMethod. Cationic lipid emulsions were formulated with soybean oil,1,2-dioleoyl-sn-glycero-3-trimethylammonium-propane (DOTAP) as acationic emulsifier and other co-emulsifiers. The physicalcharacteristics of the lipid emulsion and the emulsion/DNA complex weredetermined. The in vitro transfection efficiency of the emulsion/DNAcomplex was determined in the presence of up to 90% serum. Results. The average droplet size and zeta potential of emulsions wereca. 180 nm and ca. +50 mV, respectively. Among the emulsions, astable formulation was selected to form a complex with a plasmidDNA encoding chloramphenicol acetyltransferase. By increasing theratio of emulsion to DNA, zeta-potential of the emulsion/DNA complexincreased monotonously from negative to positive without any changesin the complex size. The complex was stable against DNase I digestionand an anionic poly-l-aspartic acid (PLAA). The complex deliveredDNA into the cells successfully, and the transfection efficiency wasnot affected by complex formation time from 20 min to 2 h. Moreimportantly, the cationic lipid emulsion facilitated the transfer of DNAin the presence of up to 90% serum. Conclusions. The cationic lipid emulsion/DNA complex has physicalstability and serum resistant properties for gene transfer.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1007553106681
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