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Atomic force microscopy (AFM) was used for studying gene transfection mediated by cationic liposomes which contain a cationic cholesterol derivative with a different spacer arm. Cationic liposomes were made by a mixture of one of eight cationic cholesterol derivatives and 1,2-dioleoyl-sn-glycero-3-phosphatidyl ethanolamine (DOPE). AFM images showed that vesicles made of the liposome/DNA complex had...
Cationic liposomes are known to be useful tools for gene transfection. However, the relation between transfection efficiency and physicochemical properties of liposomes has not been well understood. Here, we synthesized eight cationic derivatives of cholesterol which contain a tertiary amino head group with a different spacer arm. Transfection of plasmid pSV2CAT DNA into cells was done by cationic...
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