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Efficient gene transfer into mammalian cells using fusogenic liposome
H Mizuguchi1, T Nakagawa, M Nakanishi
1Faculty of Pharmaceutical Science, Osaka University, Japan.
Biochemical and Biophysical Research Communications
|January 5, 1996
Summary
Fusogenic liposomes (FLs) offer superior gene transfer into animal cells compared to cationic lipid-DNA complexes. FLs demonstrate faster, less toxic, and more effective gene delivery, even in challenging in vivo conditions.
Area of Science:
- Biotechnology
- Gene Therapy
- Cell Biology
Background:
- Fusogenic liposomes (FLs) derived from Sendai virus are recognized for efficient cellular content delivery.
- Gene transfer vectors are crucial for therapeutic applications, with nonviral methods offering safety advantages.
Purpose of the Study:
- To characterize unilamellar fusogenic liposomes (FLs) as gene transfer vectors.
- To compare the efficiency and safety of FLs against cationic lipid-DNA (CL-DNA) complexes.
Main Methods:
- Comparative analysis of gene transfer efficiency and duration of incubation.
- Assessment of cytotoxicity under equivalent gene expression levels.
- Evaluation of transfection activity in the presence of fetal calf serum (FCS).
- In vivo gene transfer of luciferase into mouse ascites tumor cells.
Main Results:
- FLs achieved efficient gene transfer in cultured cells with a 10-minute incubation, significantly faster than CL-DNA complexes (30 minutes).
- FLs exhibited lower cytotoxicity compared to CL-DNA complexes at similar gene expression levels.
- FLs retained 70% transfection activity in 40% FCS, whereas CL-DNA complexes lost activity in 5% FCS.
- FLs successfully delivered and expressed the luciferase gene in vivo in mouse ascites tumor cells, unlike CL-DNA complexes.
Conclusions:
- Unilamellar FLs represent a highly efficient and unique nonviral vector for gene transfer.
- FLs demonstrate superior performance in vitro and in vivo, particularly in serum-containing environments and for challenging in vivo applications.