Cited by 106Protein Kinase Regulation and GTPase SignalingLung Cancer Treatments and MutationsMelanoma and MAPK Pathways

Cell Type–Specific Adaptive Signaling Responses to KRASG12C Inhibition

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Solanki, Hitendra S., Welsh, Eric A., Fang, Bin, Izumi, Victoria, Darville, Lancia, Stone, Brandon, Franzese, Ryan, Chavan, Sandip +5 more·2021·Clinical Cancer Research

Published version of a preprint

Abstract

Purpose: Covalent inhibitors of KRASG12C specifically target tumors driven by this form of mutant KRAS, yet early studies show that bypass signaling drives adaptive resistance. Although several combination strategies have been shown to improve efficacy of KRASG12C inhibitors (KRASi), underlying mechanisms and predictive strategies for patient enrichment are less clear. Experimental Design: We performed mass spectrometry–based phosphoproteomics analysis in KRASG12C cell lines after short-term treatment with ARS-1620. To understand signaling diversity and cell type–specific markers, we compared proteome and phosphoproteomes of KRASG12C cells. Gene expression patterns of KRASG12C cell lines and lung tumor tissues were examined. Results: Our analysis suggests cell type–specific perturbation to ERBB2/3 signaling compensates for repressed ERK and AKT signaling following ARS-1620 treatment in epithelial cell type, and this subtype was also more responsive to coinhibition of SHP2 and SOS1. Conversely, both high basal and feedback activation of FGFR or AXL signaling were identified in mesenchymal cells. Inhibition of FGFR signaling suppressed feedback activation of ERK and mTOR, while AXL inhibition suppressed PI3K pathway. In both cell lines and human lung cancer tissues with KRASG12C, we observed high basal ERBB2/3 associated with epithelial gene signatures, while higher basal FGFR1 and AXL were observed in cells/tumors with mesenchymal gene signatures. Conclusions: Our phosphoproteomic study identified cell type–adaptive responses to KRASi. Markers and targets associated with ERBB2/3 signaling in epithelial subtype and with FGFR1/AXL signaling in mesenchymal subtype should be considered in patient enrichment schemes with KRASi.

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Crossref · 10.1158/1078-0432.ccr-20-3872

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  • A mesenchymal-like differentiation state can act as a resistance mechanism to KRAS inhibitors.

    “A mesenchymal-like differentiation state can act as a resistance mechanism to KRAS inhibitors [126,128,130].”
  • Phosphoproteomic studies on NSCLC cells treated with KRAS inhibitors identified upregulation of ERBB2/3 and AXL.

    “Finally, phosphoproteomic studies on NSCLC cells treated with KRAS inhibitors identified several additional activated pathways including the upregulation of ERBB2/3 and AXL [128].”
  • Phospho-proteomics analysis revealed that ERBB2/3 signaling mediates an adaptive response to KRAS G12C inhibition in epithelial cells, while feedback activation of FGFR and AXL was found in mesenchymal cells.

    “Phospho-proteomics analysis revealed that ERBB2/3 signaling mediates an adaptive response to KRAS G12C inhibition in epithelial cells, while feedback activation of FGFR and AXL was found in mesenchymal cells [78].”
  • RTKs were implicated in resistance to KRAS G12C inhibition associated with epithelial-mesenchymal transition.

    “RTKs were also implicated in resistance to KRAS G12C inhibition associated with epithelial-mesenchymal transition (EMT) [77, 78].”
  • High basal ERBB2/3 associated with epithelial gene signatures was observed in KRAS (G12C) cell lines and human lung cancers.

    “High basal ERBB2/3 associated with epithelial gene signatures was observed in KRAS (G12C) cell lines and human lung cancers.”

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Research works printed but not linked: 1

  1. [7]Jänne PA. A phase 1 clinical trial evaluating the pharmacokinetics (PK), safety, and clinical activity of MRTX849, a mutant-selective small molecule KRAS G12C inhibitor, in advanced solid tumors. Data presented at: AACR-NCI-EORTC International Conference on Molecular Targets; 2019 October 28; San Diego, California.

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Authors
Solanki, H. S., Welsh, E. A., Fang, B., Izumi, V., Darville, L., Stone, B., Franzese, R., Chavan, S., Kinose, F., Imbody, D., Koomen, J. M., Rix, U., & Haura, E. B.
Affiliations
  • Moffitt Cancer Center (US)
  • University of South Florida (US)
Corresponding author
Haura, Eric B.
Venue
Clinical Cancer Research
Published
2021-02-22
Volume
27
Issue
9
Pages
2533-2548
ISSN
  • 1078-0432 (ISSN-L)
  • 1557-3265
OpenAlex
W3130115867
Cited by
106
References
50
Citations by year
2026: 17 · 2025: 25 · 2024: 25 · 2023: 19 · 2022: 10 · 2021: 10
FWCI
5.02
Type
journal article
Language
en
Open access
Locations
  • Clinical Cancer Research (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • State of Florida Bankhead Coley (5BC07)
  • H. Lee Moffitt Cancer Center and Research Institute (P30-CA076292)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Lung Cancer Treatments and Mutations
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Melanoma and MAPK Pathways
Keywords
KRAS G12C, KRAS inhibitors, adaptive resistance, bypass signaling, phosphoproteomics, FGFR1, AXL, SHP2, SOS1, PI3K signaling, mTOR, lung cancer, patient enrichment, combination therapy
MeSH terms
Alleles, Chromatography, Liquid, Humans, Mutation, Phosphoproteins, Piperazines, Quinazolines, Biomarkers, Tumor, Signal Transduction, Proto-Oncogene Proteins p21(ras), Receptor, ErbB-2, Erb-b2 Receptor Tyrosine Kinases, Computational Biology, Amino Acid Substitution, Receptor, ErbB-3, Protein Interaction Mapping, Proteomics, Cell Line, Tumor, Receptor, Fibroblast Growth Factor, Type 1, Tandem Mass Spectrometry, Epithelial-Mesenchymal Transition, Protein Interaction Maps

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