Targeting of the glucocorticoid hormone receptor with plasmid DNA comprising glucocorticoid response elements improves nonviral gene transfer efficiency in the lungs of mice
| Autor: | Manish K. Aneja, Christof Maucksch, Andreas Laner, Carsten Rudolph, Petra Dames |
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| Rok vydání: | 2007 |
| Předmět: |
Tail
Green Fluorescent Proteins Electrophoretic Mobility Shift Assay Biology Gene delivery Response Elements Dexamethasone Injections Mice Receptors Glucocorticoid Glucocorticoid receptor Plasmid Cell Line Tumor Chlorocebus aethiops Drug Discovery Gene expression Genetics Animals Humans Polyethyleneimine Electrophoretic mobility shift assay Cationic liposome Luciferases Lung Molecular Biology Transcription factor Genetics (clinical) Aerosols Cell Nucleus Gene Transfer Techniques Epithelial Cells DNA Transfection Molecular biology Protein Transport COS Cells Viruses Molecular Medicine Plasmids |
| Zdroj: | The Journal of Gene Medicine. 9:820-829 |
| ISSN: | 1521-2254 1099-498X |
| DOI: | 10.1002/jgm.1082 |
| Popis: | Background It has been previously demonstrated that plasmid DNA transport into the nucleus could be increased by transcription factor binding. We chose the glucocorticoid responsive element (GRE) which binds to the glucocorticoid receptor (GR), a transcription factor which is shuttled into the nucleus upon ligand binding such as dexamethasone. Methods We cloned two, four, and eight repetitive sequences of the GRE into the reporter plasmid pEGFPLuc. Binding of the pEGFPLuc-GRE to the GR was examined by electrophoretic mobility shift assay (EMSA) experiments. GR expression in bronchiolar and alveolar epithelial cells was confirmed by Western blotting. Intracellular trafficking of GR was examined using a fusion protein of cyano-fluorescent protein (CFP) and GR. Transfection efficiencies of pEGFPLuc compared to pEGFPLucGRE2–8 were examined in vitro and in vivo upon tail vein injection of cationic liposome gene vectors containing dexamethasone (safeplexes) and aerosol application of polyethylenimine (PEI)-pDNA particles. Results Binding of GRE containing plasmids to the GR was shown in EMSA experiments and intranuclear shuttling of CFP-GR after ligand stimulation was confirmed. Enhanced gene transfer efficiency of pEGFPLucGRE2in vitro was only observed on confluent cells. A 2.5-fold increase in gene expression in the lungs of mice after tail vein injection of pEGFPLucGRE2 complexed with safeplexes compared with pEGFPLuc was observed. PEI-mediated aerosol gene delivery of pEGFPLucGRE2 was 4.7-fold higher than pEGFPLuc only after intraperitoneal dexamethasone. Conclusion The results suggest that inclusion of GRE sequences into plasmid DNA vectors combined with dexamethasone application could improve transgene expression in the lungs in vivo. Copyright © 2007 John Wiley & Sons, Ltd. |
| Databáze: | OpenAIRE |
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