Abstract:
:We have assessed whether magnetic forces (magnetofection) can enhance non-viral gene transfer to the airways. TransMAG(PEI), a superparamagnetic particle was coupled to Lipofectamine 2000 or cationic lipid 67 (GL67)/plasmid DNA (pDNA) liposome complexes. In vitro transfection with these formulations resulted in approximately 300- and 30-fold increase in reporter gene expression, respectively, after exposure to a magnetic field, but only at suboptimal pDNA concentrations. Because GL67 has been formulated for in vivo use, we next assessed TransMAG(PEI) in the murine nasal epithelium in vivo, and compared this to naked pDNA. At the concentrations required for in vivo experiments, precipitation of magnetic complexes was seen. After extensive optimization, addition of non-precipitated magnetic particles resulted in approximately seven- and 90-fold decrease in gene expression for naked pDNA and GL67/pDNA liposome complexes, respectively, compared to non-magnetic particles. Thus, whereas exposure to a magnetic field improved in vitro transfection efficiency, translation to the in vivo setting remains difficult.
journal_name
Gene Therjournal_title
Gene therapyauthors
Xenariou S,Griesenbach U,Ferrari S,Dean P,Scheule RK,Cheng SH,Geddes DM,Plank C,Alton EWdoi
10.1038/sj.gt.3302803subject
Has Abstractpub_date
2006-11-01 00:00:00pages
1545-52issue
21eissn
0969-7128issn
1476-5462pii
3302803journal_volume
13pub_type
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