RRC ID 43003
Author Maitani Y, Igarashi S, Sato M, Hattori Y.
Title Cationic liposome (DC-Chol/DOPE=1:2) and a modified ethanol injection method to prepare liposomes, increased gene expression.
Journal Int J Pharm
Abstract Cationic liposomes composed of 3beta-[N-(N',N'-dimethylaminoethane)-carbamoyl] cholesterol (DC-Chol) and dioleoylphosphatidylethanolamine (DOPE) (DC-Chol/DOPE liposome, molar ratio, 1:1 or 3:2) prepared by the dry-film method have been often used as non-viral gene delivery vectors. The formulation and preparation of DC-Chol/DOPE liposomes, as well as the formation of their lipoplexes were investigated in an attempt to improve transfection efficiency in vitro. A more efficient transfection in medium with serum was achieved using DC-Chol/DOPE liposomes (molar ratio, 1:2) than those (3:2), and preparation method by a modified ethanol injection than the dry-film. The most efficient DC-Chol/DOPE liposome for gene transfer was molar ratio (1:2) and prepared by a modified ethanol injection method. The enhanced transfection might be related to an increase in the release of DNA in the cytoplasm by the large lipoplex during incubation in optiMEM, not to an increased cellular association with the lipoplex. The use of a modified ethanol injection method might enhance the role of DOPE that is aid in destabilization of the plasma membrane and/or endosome. These findings suggested that cationic liposomes rich in DOPE prepared by a modified ethanol injection method will help to improve the efficacy of liposome vector systems for gene delivery.
Volume 342(1-2)
Pages 33-9
Published 2007-9-5
DOI 10.1016/j.ijpharm.2007.04.035
PII S0378-5173(07)00368-7
PMID 17566677
MeSH Cell Survival / drug effects Chemistry, Pharmaceutical Chloroquine / pharmacology Cholesterol / chemistry Cryoelectron Microscopy DNA / administration & dosage* Drug Delivery Systems* Ethanol / chemistry Excipients Flow Cytometry Gene Transfer Techniques* Genes, Reporter / genetics HeLa Cells Humans Liposomes / chemistry* Luciferases / genetics Particle Size Phosphatidylethanolamines / chemistry Solvents / chemistry Transfection
IF 4.213
Times Cited 55
Human and Animal Cells