Abstract
Targeted therapeutics toward specific genes and pathways represent the future of oncological treatments. However, several commonly activated oncogenes, such as MYC, have proven difficult to target by pharmacological agents. To broaden the menu of potentially druggable therapeutic targets, we describe a method to detect genes essential for the survival of MYC overexpressing cells, which we will refer to as MYC-synthetic lethal genes (MYC-SL) (Toyoshima et al., Proc Natl Acad Sci USA 109:9545–9550, 2012). These genes represent candidate targets for drug development to be utilized for MYC-driven cancers as well as probes to further our understanding of the biology of MYC-driven tumorigenesis. The discovery platform includes the following components: (1) an isogenic cell system that enables overexpression of MYC without oncogene-induced senescence (OIS) response (Benanti and Galloway, Mol Cell Biol 24:2842–2852, 2004; Benanti et al., Mol Cancer Res 5:1181–1189, 2007); (2) arrayed siRNA libraries targeting individual genes; (3) automated laboratory equipment for dispensing of cells, siRNAs, and readout assays; and (4) bioinformatics and software for data mining and visualization. This flexible platform can be readily applied to other oncogenes or tumor suppressor genes.
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Acknowledgments
I am indebted to Maki Imakura and James Annis for sharing their expertise in high-throughput screening. I also thank Hamid Bolouri, Daniel Diolait-i, and Christopher Kemp for critical reading of this chapter and Daniel Diolait-i for figure design, Aaron Chang and Hamid Bolouri for discussion of bioinformatics tools, and Kristin Robinson in Denise Galloway’s laboratory for isolating HFFs cultures.
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Grandori, C. (2013). A High-Throughput siRNA Screening Platform to Identify MYC-Synthetic Lethal Genes as Candidate Therapeutic Targets. In: Soucek, L., Sodir, N. (eds) The Myc Gene. Methods in Molecular Biology, vol 1012. Humana Press, Totowa, NJ. https://doi.org/10.1007/978-1-62703-429-6_12
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DOI: https://doi.org/10.1007/978-1-62703-429-6_12
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