Abstract
Drug-inducible recombination based on flippase (FLP) is frequently used in animal models and in transgenic cell lines to initiate or to abrogate gene expression. Although the system is highly efficient, functional gene analyses depend on the availability of suitable animal models. In contrast, lentiviral vectors are readily available and versatile tools for the transfer of genetic information into a wide variety of target cells, and can be produced at high titer in a timely manner. To combine the advantages of both approaches, we generated a tight, drug-controlled FLP recombinase consisting of a 5′ FKBP12 derived conditional destruction domain and a 3′ estrogen receptor ligand binding (ERT2) domain. We successfully constructed lentiviral vectors expressing drug-controlled FLP in combination with a fluorescent reporter for recombination of FLP recognition target (FRT) sites located in trans as well as with target alleles located in cis (all-in-one configuration). In this chapter, we describe the design of the drug controlled FLP recombinase, the construction of molecular switches consisting of FLP expressing lentiviral vectors for inducible recombination of target sites located in cis and in trans, as well as the details for the characterization of lentiviral FLP vectors in cell lines.
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Acknowledgements
This work was supported by the German Research Foundation (DFG, Cluster of Excellence REBIRTH Exc 62/1 and the SFB738), the European Union (PERSIST FP7-HEALTH-2007-B-222878, CellPID FP7-HEALTH-2010-261387), the DAAD and the BMBF (Modern Applications in Biotechnology, German–Chinese JRG). We thank Michael Morgan for critically reading the final version of the manuscript.
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Maetzig, T., Schambach, A. (2016). Development of Inducible Molecular Switches Based on All-in-One Lentiviral Vectors Equipped with Drug Controlled FLP Recombinase. In: Federico, M. (eds) Lentiviral Vectors and Exosomes as Gene and Protein Delivery Tools. Methods in Molecular Biology, vol 1448. Humana Press, New York, NY. https://doi.org/10.1007/978-1-4939-3753-0_2
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DOI: https://doi.org/10.1007/978-1-4939-3753-0_2
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