Abstract
To improve the efficiency of retroviral transduction into human hepatoma cells, new liposomes were prepared using different cationic and neutral lipids. Their effect on the retroviral transduction was evaluated using PLC/PRF/5 hepatoma cells and Moloney murine leukemia virus-derived retrovirus carrying herpes simplex thymidine kinase gene. Those liposomes consisted of cationic lipids with a long spacer were highly efficient in enhancing retroviral transduction and also less cytotoxic. On the other hand, the length of hydrophobic domains of neutral lipids was not correlated with the efficiency in enhancing the retroviral transduction. These results suggest that liposomes which effectively enhance retrovirus transduction can be developed by using cationic lipids with new spacers.
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