Rxivist combines preprints from bioRxiv with data from Twitter to help you find the papers being discussed in your field. Currently indexing 70,625 bioRxiv papers from 308,308 authors.
Improved estimation of cancer dependencies from large-scale RNAi screens using model-based normalization and data integration
James M McFarland,
Zandra V Ho,
Joshua M Dempster,
Phillip G Montgomery,
Jordan G Bryan,
John M Krill-Burger,
Thomas M Green,
Jesse S. Boehm,
Todd R. Golub,
William C. Hahn,
David E Root,
Posted 24 Apr 2018
bioRxiv DOI: 10.1101/305656 (published DOI: 10.1038/s41467-018-06916-5)
Posted 24 Apr 2018
The availability of multiple datasets together comprising hundreds of genome-scale RNAi viability screens across a diverse range of cancer cell lines presents new opportunities for understanding cancer vulnerabilities. Integrated analyses of these data to assess differential dependency across genes and cell lines are challenging due to confounding factors such as batch effects and variable screen quality, as well as difficulty assessing gene dependency on an absolute scale. To address these issues, we incorporated estimation of cell line screen quality parameters and hierarchical Bayesian inference into an analytical framework for analyzing RNAi screens (DEMETER2; https://depmap.org/R2-D2). We applied this model to individual large-scale datasets and show that it substantially improves estimates of gene dependency across a range of performance measures, including identification of gold-standard essential genes as well as agreement with CRISPR-Cas9-based viability screens. This model also allows us to effectively integrate information across three large RNAi screening datasets, providing a unified resource representing the most extensive compilation of cancer cell line genetic dependencies to date.
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