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- W20456437 abstract "Genetic modification of stem cells, prior to transplantation, can enhance their survival and can improve their function in cell therapy settings. Mesenchymal stem cells (MSC) are considered one of the most promising tools for cell-based gene therapy, due to their multipotency, ease of isolation, as well as their high ex vivo expansion potential. Neural stem cells (NSC) may also present an ideal route for gene therapy and have been considered for use in cell replacement therapies in various neurodegenerative diseases. Gene therapy-based applications require the transfer of genetic material, either by viral or nonviral gene delivery methods, although the latter has been associated with low efficiencies, especially within hard to transfect cells as stem cells. Herein, we present results on the influence of plasmid size in gene delivery to human MSC and mouse NSC. We used minimized plasmids encoding a fluorescent protein but lacking the antibiotic resistance gene. This work shows that (1) for smaller plasmids the intracellular plasmid copy number can be up to 2.6-fold higher, and (2) the number of cells presenting fluorescence can be twice the number obtained for larger plasmids. Furthermore, by using plasmid constructs containing different polyA signals, we also demonstrated that differences between the plasmids depend largely on the transgene mRNA level. Based on our data we demonstrate that plasmid size severely affects the efficiency of nuclear uptake and we propose that it can also affect the rate of heterochromatin associated gene silencing in stem cells." @default.
- W20456437 created "2016-06-24" @default.
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- W20456437 date "2012-04-01" @default.
- W20456437 modified "2023-10-14" @default.
- W20456437 title "Plasmid DNA Size Does Affect Nonviral Gene Delivery Efficiency in Stem Cells" @default.
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- W20456437 doi "https://doi.org/10.1089/cell.2011.0093" @default.
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