Abstract
Although DNA damaging chemotherapy and radiation therapy remain the main stay of current treatments for cancer patient, these therapies usually have toxic side effect and narrow therapeutic window. One of the challenges in cancer drug discovery is how to identify drugs that selectively kill cancer cells while leaving the normal cell intact. Recently, synthetic lethality has been applied to cancer drug discovery in various settings, and has become a promising approach for identifying novel agents for the treatment of cancer. A prototypical example is the synthetic lethal interaction between PARP inhibition and BRCA deficiency. PARP inhibitors represent the most advanced clinical agents targeting specifically DNA repair mechanisms in cancer therapy. In this chapter, I will review the molecular mechanism for this synthetic lethality and the clinical applications for PARP inhibitors. I will also discuss the formats of synthetic lethal screens, current progress on the utilization of these screens, and some of the advantages and challenges of synthetic lethal screens in cancer drug discovery.
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Acknowledgments
I would like to thank Drs. Alexander Shoemaker, Eric Johnson, and Gui-dong Zhu for critically reading the manuscript.
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Liu, X. (2013). PARP Inhibition as a Prototype for Synthetic Lethal Screens. In: Moll, J., Colombo, R. (eds) Target Identification and Validation in Drug Discovery. Methods in Molecular Biology, vol 986. Humana Press, Totowa, NJ. https://doi.org/10.1007/978-1-62703-311-4_9
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DOI: https://doi.org/10.1007/978-1-62703-311-4_9
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