TY - JOUR A1 - Brammeld, Jonathan S. A1 - Petljak, Mia A1 - Martincorena, Inigo A1 - Williams, Steven P. A1 - Alonso, Luz Garcia A1 - Dalmases, Alba A1 - Bellosillo, Beatriz A1 - Robles-Espinoza, Carla Daniela A1 - Price, Stacey A1 - Barthorpe, Syd A1 - Tarpey, Patrick A1 - Alifrangis, Constantine A1 - Bignell, Graham A1 - Vidal, Joana A1 - Young, Jamie A1 - Stebbings, Lucy A1 - Beal, Kathryn A1 - Stratton, Michael R. A1 - Saez-Rodriguez, Julio A1 - Garnett, Mathew A1 - Montagut, Clara A1 - Iorio, Francesco A1 - McDermott, Ultan T1 - Genome-wide chemical mutagenesis screens allow unbiased saturation of the cancer genome and identification of drug resistance mutations Y1 - 2017/02/08 JF - Genome Research JO - Genome Research DO - 10.1101/gr.213546.116 UR - http://genome.cshlp.org/content/early/2017/03/15/gr.213546.116.abstract N2 - Drug resistance is an almost inevitable consequence of cancer therapy and ultimately proves fatal for the majority of patients. In many cases, this is the consequence of specific gene mutations that have the potential to be targeted to resensitize the tumor. The ability to uniformly saturate the genome with point mutations without chromosome or nucleotide sequence context bias would open the door to identify all putative drug resistance mutations in cancer models. Here, we describe such a method for elucidating drug resistance mechanisms using genome-wide chemical mutagenesis allied to next-generation sequencing. We show that chemically mutagenizing the genome of cancer cells dramatically increases the number of drug-resistant clones and allows the detection of both known and novel drug resistance mutations. We used an efficient computational process that allows for the rapid identification of involved pathways and druggable targets. Such a priori knowledge would greatly empower serial monitoring strategies for drug resistance in the clinic as well as the development of trials for drug-resistant patients. ER -