Summary
A large number of cancer gene therapy clinical trials are currently being performed that are attempting to evaluate novel approaches to eliminate tumor cells by the introduction of genetic material into patients. One of the most important objectives in gene therapy is the development of highly safe and efficient vector systems for gene transfer in eukaryotic cells. Currently, viral and nonviral vector systems are used, both having their advantages and limitations. Minicircles are novel supercoiled minimal expression cassettes, derived from conventional plasmid DNA by site-specific recombination in vivo in Escherichia coli for the use in nonviral gene therapy and vaccination. Minicircle DNA lacks the bacterial backbone sequence consisting of an antibiotic resistance gene, an origin of replication, and inflammatory sequences intrinsic to bacterial DNA. In addition to their improved safety profile, minicircles have been shown to greatly increase the efficiency of transgene expression in various in vitro and in vivo studies. In this chapter, we describe the production, purification, and application of minicircle DNA and discuss the rationale of the improved gene transfer efficiencies compared to conventional plasmid DNA.
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© 2009 Humana Press, a part of Springer Science+Business Media, LLC
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Mayrhofer, P., Schleef, M., Jechlinger, W. (2009). Use of Minicircle Plasmids for Gene Therapy. In: Walther, W., Stein, U. (eds) Gene Therapy of Cancer. Methods in Molecular Biology™, vol 542. Humana Press. https://doi.org/10.1007/978-1-59745-561-9_4
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DOI: https://doi.org/10.1007/978-1-59745-561-9_4
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