Abstract
Gene therapy provides a promising approach for cancer treatment. Earlier studies suggested that poly-L-lysine-modified iron oxide nanoparticles (IONP-PLL) might be a promising gene delivery system that can transfect DNA efficiently in vitro and in vivo. In this study we used IONP-PLL as gene carriers to deliver the NM23-H1 gene, the first suppressor gene of cancer metastasis, to tumor cells in vivo. The intravenous injection of IONP-PLL carrying NM23-H1-GFP plasmid DNA significantly extended the survival time of an experimental pulmonary metastasis mouse model. In the IONP-PLL/NM23-H1-GFP-treated group, metastasis was clearly suppressed compared with the group treated with free NM23-H1-GFP plasmid. Furthermore, this gene therapy combined with cyclophosphamide treatment resulted in longer survival times and greater suppression of metastasis growth. In conclusion, treatment with IONP-PLL nanoparticles incorporating the NM23-H1gene is an efficient gene therapy method, and it is even more effective in combination with chemotherapy. This approach appears to be a promising strategy for treatment of metastatic tumors.
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Acknowledgements
This study was supported by the State Key Science Research Program of China (2006CB910502, 2006CB910504), The 111 project (111-2-12), The National ‘863’ High Technology Program of China (2007AA02Z170).
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Li, Z., Xiang, J., Zhang, W. et al. Nanoparticle delivery of anti-metastatic NM23-H1 gene improves chemotherapy in a mouse tumor model. Cancer Gene Ther 16, 423–429 (2009). https://doi.org/10.1038/cgt.2008.97
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DOI: https://doi.org/10.1038/cgt.2008.97
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