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Specific gene delivery into hepatoma cells by liposomes and specific gene expression under the control of the cyclin A promoter were examined in HepG2 cells, a hepatoblastoma cell line that overexpresses cyclin A. A plasmid carrying the luciferase gene under the cyclin A promoter sequence was condensed with poly-L-lysine and encapsulated into anionic asialofetuin-labeled liposomes (AF-liposomes), which were preferentially taken up by hepatocytes through the action of the asialoglycoprotein receptor (AgpR). AF-liposomes delivered plasmids to the hepatoma cells by receptor-mediated endocytosis through the AgpR, and transgene expression could be achieved under the control of the cyclin A promoter. Furthermore, a fusogenic lipid, DOPE, as a liposomal component was required for the enhancement of transfection efficiency of AF-liposomes.

Efficient Gene Transfer to Hepatoblastoma Cells through Asialoglycoprotein Receptor and Expression under the Control of the Cyclin A Promoter.