bioRxiv preprint doi: https://doi.org/10.1101/2020.08.31.275107; this version posted August 31, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder. All rights reserved. No reuse allowed without permission. CRISPR screens in physiologic medium reveal conditionally essential genes in human cells Nicholas J. Rossiter1, Kimberly S. Huggler1,2, Charles H. Adelmann3,4,5,6, Heather R. Keys3, Ross W. Soens1,2, David M. Sabatini3,4,5,6*, and Jason R. Cantor1,2,7,8* 1Morgridge Institute for Research, Madison, WI 53715, USA 2Department of Biochemistry, University of Wisconsin-Madison, Madison, WI 53706, USA 3Whitehead Institute for Biomedical Research, Cambridge, MA 02142, USA 4Howard Hughes Medical Institute, Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA 5Koch Institute for Integrative Cancer Research, Cambridge, MA 02139, USA 6Broad Institute of Harvard and Massachusetts Institute of Technology, Cambridge, MA 02142, USA 7Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA 8Carbone Cancer Center, University of Wisconsin-Madison, Madison, WI 53705, USA *Correspondence:
[email protected] or
[email protected] bioRxiv preprint doi: https://doi.org/10.1101/2020.08.31.275107; this version posted August 31, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder. All rights reserved. No reuse allowed without permission. SUMMARY Forward genetic screens across hundreds of diverse cancer cell lines have started to define the genetic dependencies of proliferating human cells and how these vary by genotype and lineage. Most screens, however, have been carried out in culture media that poorly resemble metabolite availability in human blood.