Abstract
Transplantation of pigment epithelial cells in patients with age-related macular degeneration and Parkinson's disease has the potential to improve functional rehabilitation. Genetic modification of cells before transplantation may allow the delivery of neuroprotective factors to achieve functional improvement. As transplantation of cells modified using viral vectors is complicated by the possible dissemination of viral particles and severe immune reactions, we have explored non-viral methods to insert genetic material in pigment epithelial cells. Using lipofection or nucleofection ARPE-19 cells, freshly isolated and primary retinal and iris pigment epithelial (IPE) cells were transfected with plasmids encoding green fluorescent protein (GFP) and with three plasmids encoding recombinant pigment epithelium-derived factor (PEDF) and GFP. Transfection efficiency was evaluated by fluorescence microscopy and stability of protein expression by immunoblotting. Pigment epithelial cells were successfully transfected with plasmid encoding GFP. Expression of GFP in ARPE-19 was transient, but was observed for up to 1 year in IPE cells. Analysis of pigment epithelial cells transfected with PEDF plasmids revealed that PEDF fusion proteins were successfully expressed and functionally active. In conclusion, efficient transfer of genetic information in pigment epithelial cells can be achieved using non-viral transfection protocols.
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Acknowledgements
This work was supported by a grant from the Interdisciplinary Center for Clinical Research ‘Biomat.’ within the faculty of Medicine at the RWTH Aachen University. The authors thank Angela Bleck (Fraunhofer IME, Department of Pharmaceutical Product Development, Forckenbeckstraße 6, 52074 Aachen, Germany) for technical assistance and Ria Lindt for initial work in this project.
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Thumann, G., Stöcker, M., Maltusch, C. et al. High efficiency non-viral transfection of retinal and iris pigment epithelial cells with pigment epithelium-derived factor. Gene Ther 17, 181–189 (2010). https://doi.org/10.1038/gt.2009.124
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DOI: https://doi.org/10.1038/gt.2009.124
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