Cited by 175Protein Kinase Regulation and GTPase SignalingCancer Genomics and DiagnosticsMelanoma and MAPK Pathways

KRAS G12C inhibition produces a driver-limited state revealing collateral dependencies

Open access
Lou, Kevin, Steri, Veronica, Ge, Alex Y., Hwang, Y. Christina, Yogodzinski, Christopher H., Shkedi, Arielle R., Choi, Alex L. M., Mitchell, Dominique C. +5 more·2019·Science Signaling

Abstract

Functional genomics reveals paths to enhancing combination therapies in KRAS-mutant cancers.

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Crossref · 10.1126/scisignal.aaw9450

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  • CRISPRi experiments in other cancer cell types (AML, CML, pancreatic cancer and lung cancer cell lines) demonstrated that, unlike PSMA1, PTGES3 is not an essential gene upon knockdown.

    “Furthermore, CRISPRi experiments in other cancer cell types (AML, CML, pancreatic cancer and lung cancer cell lines54–56) demonstrated that, unlike PSMA1, which is a positive control commonly essential gene, PTGES3 is not an essential gene upon knockdown (Extended Data Fig. 10d–g).”

    From Genome-scale CRISPR screens identify PTGES3 as a direct modulator of androgen receptor function in advanced prostate cancer (2025) · cites this paper as [56]

    The Results section ('Genome-scale CRISPRi screens nominate KRASG12C collateral dependent genes'; page unavailable) reports CRISPRi screens in pancreatic MIA PaCa-2 and lung H358 cancer cells. It does not report the claimed comparison of PTGES3 and PSMA1 essentiality, or experiments in AML or CML cells. (LLM, conf=0.78)

    Experimental — accuracy not yet measured
  • CRISPRi screens using ARS-1620 in lung and pancreatic cancer cells identified SHP2 and CDK4 as collateral dependency genes whose targeting may potentiate KRASi in resistant cells.

    “CRISPRi screens using the precursor G12C inhibitor ARS-1620 in lung and pancreatic cancer cells identified a broad range of genes both core (SHP2) and ancillary (CDK4) to RAS function as collateral dependency genes whose targeting may potentiate KRASi in resistant cells [113].”

    From KRAS: Biology, Inhibition, and Mechanisms of Inhibitor Resistance (2024) · cites this paper as [113]

    The Results sections on genome-scale CRISPRi screens and the CD map identify SHP2 and CDK4 as genes whose targeting can enhance response to ARS-1620 in lung and pancreatic cancer models. The Introduction proposes targeting collateral dependencies to address resistance, but the screened cell lines were described as highly sensitive to ARS-1620, not as resistant cells. Thus the resistant-cell qualifier remains a proposed application rather than a finding in those cells. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • HER family and FGFR signaling are key mediators of adaptive feedback to RAS-MAPK pathway inhibitors.

    “This finding is consistent with prior studies identifying HER family and FGFR signaling as key mediators of adaptive feedback to RAS-MAPK pathway inhibitors (10–14,21,22) and recent functional genomic screens(40).”
  • CRISPRi-mediated suppression of HRAS, NRAS, TSC1/2, and NF1 led to resistance to KRASi.

    “The CRISPRi-mediated suppression of HRAS, NRAS, TSC1/2, and NF1 led to resistance to KRASi [113].”

    From KRAS: Biology, Inhibition, and Mechanisms of Inhibitor Resistance (2024) · cites this paper as [113]

    The Results section describes CRISPRi screens measuring how gene knockdown affects susceptibility to the KRASG12C inhibitor ARS-1620, but it does not report resistance from suppressing the genes named in the claim. Searches for HRAS, NRAS, TSC1, TSC2, and NF1 found no passage establishing those gene-specific outcomes; the Methods list individually evaluated sgRNAs for other genes. No page numbers are available in our copy. (LLM, conf=0.76)

    Experimental — accuracy not yet measured
  • In vitro and in vivo preclinical studies suggest additive and synergistic benefit of CDK4/6 and KRASG12C co-inhibition in models of NSCLC and PDAC.

    “Moreover, in vitro and in vivo preclinical studies suggest additive and synergistic benefit of CDK4/6 and KRASG12C co-inhibition in models of NSCLC and PDAC149.”

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Authors
Lou, K., Steri, V., Ge, A. Y., Hwang, Y. C., Yogodzinski, C. H., Shkedi, A. R., Choi, A. L. M., Mitchell, D. C., Swaney, D. L., Hann, B., Gordan, J. D., Shokat, K. M., & Gilbert, L. A.
Affiliations
  • University of California, San Francisco (US)
  • Howard Hughes Medical Institute (US)
Corresponding author
  • Shokat, Kevan M.
  • Gilbert, Luke A.
Venue
Science Signaling
Published
2019-05-28
Volume
12
Issue
583
ISSN
  • 1937-9145 (ISSN-L)
  • 1945-0877
OpenAlex
W2947368578
Cited by
175
References
58
Citations by year
2026: 11 · 2025: 19 · 2024: 23 · 2023: 23 · 2022: 32 · 2021: 38 · 2020: 25 · 2019: 4
FWCI
8.19
Type
journal article
Language
en
Open access
Locations
  • Science Signaling (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
Funders
  • National Institutes of Health (R01CA190408, R00CA204602)
  • Howard Hughes Medical Institute
  • Samuel Waxman Cancer Research Foundation
  • Stand Up To Cancer (SU2C-AACR-DT17-15)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer Genomics and Diagnostics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Melanoma and MAPK Pathways
Keywords
KRAS G12C, KRAS inhibitors, gene dependency, oncogene inhibition, target engagement, tumor cell survival
MeSH terms
Animals, Antineoplastic Agents, Cysteine, Female, Humans, Lung Neoplasms, Mice, Nude, Mutation, Neoplasm Transplantation, Oncogenes, Pancreatic Neoplasms, Protein Binding, Signal Transduction, Proto-Oncogene Proteins p21(ras), Sequence Analysis, RNA, Genomics, Proteomics, Cell Line, Tumor, Cell Proliferation, Mice, HEK293 Cells, CRISPR-Cas Systems

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