Cited by 458Genetic factors in colorectal cancerDNA Repair MechanismsPARP inhibition in cancer therapy

WRN helicase is a synthetic lethal target in microsatellite unstable cancers

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Chan, Edmond M., Shibue, Tsukasa, McFarland, James M., Gaeta, Benjamin, Ghandi, Mahmoud, Dumont, Nancy, Gonzalez, Alfredo, McPartlan, Justine S. +33 more·2019·Nature

Published version of a preprint

Abstract

Synthetic lethality-an interaction between two genetic events through which the co-occurrence of these two genetic events leads to cell death, but each event alone does not-can be exploited for cancer therapeutics 1. DNA repair processes represent attractive synthetic lethal targets, because many cancers exhibit an impairment of a DNA repair pathway, which can lead to dependence on specific repair proteins 2. The success of poly(ADP-ribose) polymerase 1 (PARP-1) inhibitors in cancers with deficiencies in homologous recombination highlights the potential of this approach 3. Hypothesizing that other DNA repair defects would give rise to synthetic lethal relationships, we queried dependencies in cancers with microsatellite instability (MSI), which results from deficient DNA mismatch repair. Here we analysed data from large-scale silencing screens using CRISPR-Cas9-mediated knockout and RNA interference, and found that the RecQ DNA helicase WRN was selectively essential in MSI models in vitro and in vivo, yet dispensable in models of cancers that are microsatellite stable. Depletion of WRN induced double-stranded DNA breaks and promoted apoptosis and cell cycle arrest selectively in MSI models. MSI cancer models required the helicase activity of WRN, but not its exonuclease activity. These findings show that WRN is a synthetic lethal vulnerability and promising drug target for MSI cancers.

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Authors
Chan, E. M., Shibue, T., McFarland, J. M., Gaeta, B., Ghandi, M., Dumont, N., Gonzalez, A., McPartlan, J. S., Li, T., Zhang, Y., Bin Liu, J., Lazaro, J.-B., Gu, P., Piett, C. G., Apffel, A., Ali, S. O., Deasy, R., Keskula, P., Ng, R. W. S., Roberts, E. A., Reznichenko, E., Leung, L., Alimova, M., Schenone, M., Islam, M., Maruvka, Y. E., Liu, Y., Roper, J., Raghavan, S., Giannakis, M., Tseng, Y.-Y., Nagel, Z. D., D’Andrea, A., Root, D. E., Boehm, J. S., Getz, G., Chang, S., Golub, T. R., Tsherniak, A., Vazquez, F., & Bass, A. J.
Affiliations
  • Broad Institute (US)
  • Harvard University (US)
  • Yale University (US)
  • Duke University (US)
Corresponding author
Bass, Adam J.
Venue
Nature
Published
2019-04-10
Volume
568
Issue
7753
Pages
551-556
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W2905437169
Cited by
458
References
48
Citations by year
2026: 67 · 2025: 80 · 2024: 75 · 2023: 32 · 2022: 60 · 2021: 73 · 2020: 47 · 2019: 22 · 2012: 1
FWCI
38.46
Type
journal article
Language
en
Open access
Locations
  • Nature (publishedVersion)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • Digital Access to Scholarship at Harvard (DASH) (Harvard University) (submittedVersion, cc-by)
  • RePEc: Research Papers in Economics (submittedVersion)
Funders
  • Broad Institute
  • National Institutes of Health
  • National Cancer Institute (K08CA198002, T32CA009172, P30CA014236)
  • National Institute of Diabetes and Digestive and Kidney Diseases (P30DK034854)
Topics
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Genetic factors in colorectal cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Health Sciences › Medicine › Oncology › PARP inhibition in cancer therapy
Keywords
WRN helicase, synthetic lethality, microsatellite instability, mismatch repair deficiency, RecQ helicase, DNA repair deficiency, cancer drug targets, DNA double-strand breaks, apoptosis, cell cycle arrest, exonuclease activity, CRISPR-Cas9 knockout screen, RNAi screen
MeSH terms
Werner Syndrome Helicase, Synthetic Lethal Mutations, Humans, Models, Genetic, Neoplasms, Tumor Suppressor Protein p53, Apoptosis, Microsatellite Repeats, RNA Interference, Cell Line, Tumor, Microsatellite Instability, DNA Breaks, Double-Stranded, Cell Cycle Checkpoints, CRISPR-Cas Systems

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