Cited by 259Lung Cancer Treatments and MutationsHER2/EGFR in Cancer ResearchCancer Genomics and Diagnostics

Concurrent Alterations in EGFR-Mutant Lung Cancers Associated with Resistance to EGFR Kinase Inhibitors and Characterization of MTOR as a Mediator of Resistance

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Yu, Helena A., Suzawa, Ken, Jordan, Emmet, Zehir, Ahmet, Ni, Ai, Kim, Ryan, Kris, Mark G., Hellmann, Matthew D. +7 more·2018·Clinical Cancer Research

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Abstract

Abstract Purpose: To identify molecular factors that determine duration of response to EGFR tyrosine kinase inhibitors and to identify novel mechanisms of drug resistance, we molecularly profiled EGFR-mutant tumors prior to treatment and after progression on EGFR TKI using targeted next-generation sequencing. Experimental Design: Targeted next-generation sequencing was performed on 374 consecutive patients with metastatic EGFR-mutant lung cancer. Clinical data were collected and correlated with somatic mutation data. Erlotinib resistance due to acquired MTOR mutation was functionally evaluated by in vivo and in vitro studies. Results: In 200 EGFR-mutant pretreatment samples, the most frequent concurrent alterations were mutations in TP53, PIK3CA, CTNNB1, and RB1 and focal amplifications in EGFR, TTF1, MDM2, CDK4, and FOXA1. Shorter time to progression on EGFR TKI was associated with amplification of ERBB2 (HR = 2.4, P = 0.015) or MET (HR = 3.7, P = 0.019), or mutation in TP53 (HR = 1.7, P = 0.006). In the 136 posttreatment samples, we identified known mechanisms of acquired resistance: EGFR T790M (51%), MET (7%), and ERBB2 amplifications (5%). In the 38 paired samples, novel acquired alterations representing putative resistance mechanisms included BRAF fusion, FGFR3 fusion, YES1 amplification, KEAP1 loss, and an MTOR E2419K mutation. Functional studies confirmed the contribution of the latter to reduced sensitivity to EGFR TKI in vitro and in vivo. Conclusions: EGFR-mutant lung cancers harbor a spectrum of concurrent alterations that have prognostic and predictive significance. By utilizing paired samples, we identified several novel acquired alterations that may be relevant in mediating resistance, including an activating mutation in MTOR further validated functionally. Clin Cancer Res; 24(13); 3108–18. ©2018 AACR.

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  • NRF2-activating mutations have been associated with chemo- and radiation resistance in lymphoma, leukemia, and solid tumors.

    “NRF2-activating mutations are rare in untreated lymphomas; however, they have been associated with chemo- and radiation resistance in lymphoma [37,38], leukemia [39], and in solid tumors [40].”

    From NRF2 Activation Confers Resistance to eIF4A Inhibitors in Cancer Therapy (2021) · cites this paper as [40]

    The Discussion (page unavailable) links KEAP1 loss and increased NRF2 expression to possible resistance to RTK/MAPK pathway inhibitors in non-small-cell lung cancer. Citation [40] is attached to the solid-tumor portion of the citing sentence, but the source does not establish resistance to chemotherapy or radiation, or address NRF2-activating mutations specifically. (LLM, conf=0.82)

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  • Several distinct patterns of co-mutations are enriched in metastatic disease, likely reflecting acquisition of traits that promote tumor progression and metastatic dissemination.

    “In particular, it is critical to distinguish between early-stage, surgically resected tumors and locally advanced or metastatic disease because several distinct patterns of co-mutations are enriched in metastatic disease, likely reflecting acquisition of traits that promote tumor progression and metastatic dissemination72, 73.”
  • The spectrum of enriched genomic co-alterations in advanced EGFR-mutant LUAD is dominated by recurrent mutations in TP53 (54.6%-64.6%), RB1 (9.6%-10.33%), CTNNB1 (5.3%-9.6%), and PIK3CA (9%-12.4%), as well as amplifications involving EGFR (22%-25.5%), NKX2-1 (12.2%-16.7%), CDK4 (7%-10%), CDK6 and CCNE1.

    “The spectrum of enriched genomic co-alterations in advanced EGFR-mutant LUAD is dominated by recurrent mutations in a core set of genes including TP53 (54.6% % - 64.6%), RB1 (9.6%−10.33%), CTNNB1 (which encodes β-catenin; 5.3%−9.6%), and PIK3CA (9%−12.4%) as well as amplifications involving EGFR itself (22% - 25.5%), NKX2–1 (12.2% - 16.7%), CDK4 (7%−10%), CDK6 and CCNE115, 72, 73 (Figure 2).”
  • Mutations in PIK3CA and CTNNB1 are more frequent in advanced stage tumors compared with early stage LUADs, whereas alterations in TP53, RB1 and NKX2-1 appear to occur with comparable frequencies in early- and advanced-stage tumors.

    “Mutations in PIK3CA and CTNNB1 are more frequent in advanced stage tumors compared with early stage LUADs, pointing towards functional roles in malignant progression and metastasis, whereas alterations in TP53 (62.5%), RB1 (9.5 −12.5%) and NKX2–1 (12.5%) appear to occur with comparable frequencies in early- and advanced-stage tumors15, 34, 72, 73.”
  • The overwhelming majority of EGFR-mutant lung tumors harbor one or more co-mutations, even when analysis is limited to pre-defined sets of cancer-relevant genes within established panels.

    “Although EGFR –mutant tumors represent the prototypical oncogene-addicted LUAD subgroup that spearheaded adoption of the single-driver model, the overwhelming majority of EGFR-mutant lung tumors harbor one or more co-mutations, even when the analysis is limited to pre-defined sets of cancer-relevant genes within established panels (FoundationOne, Guardant360, MSK-IMPACT)15, 59, 72, 73.”

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Research works printed but not linked: 1

  1. [26]Cheng DT,, Memorial Sloan Kettering-Integrated Mutation Profiling of Actionable Cancer Targets (MSK-IMPACT): A Hybridization Capture-Based Next-Generation Sequencing Clinical Assay for Solid Tumor Molecular Oncology. J Mol Diagn, 2015 17(3): p. 251– 64. 25801821 PMC5808190

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Authors
Yu, H. A., Suzawa, K., Jordan, E., Zehir, A., Ni, A., Kim, R., Kris, M. G., Hellmann, M. D., Li, B. T., Somwar, R., Solit, D. B., Berger, M. F., Arcila, M., Riely, G. J., & Ladanyi, M.
Affiliations
  • Memorial Sloan Kettering Cancer Center (US)
  • 3Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, New York.
Corresponding author
Yu, Helena A.
Venue
Clinical Cancer Research
Published
2018-07-01
Volume
24
Issue
13
Pages
3108-3118
ISSN
  • 1078-0432 (ISSN-L)
  • 1557-3265
OpenAlex
W2792218462
Cited by
259
References
55
Citations by year
2026: 15 · 2025: 18 · 2024: 25 · 2023: 29 · 2022: 37 · 2021: 43 · 2020: 42 · 2019: 42 · 2018: 8
FWCI
25.43
Type
journal article
Language
en
Open access
Locations
  • Clinical Cancer Research (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
NIH (P01 CA129243)
Topics
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Lung Cancer Treatments and Mutations
  • Health Sciences › Medicine › Oncology › HER2/EGFR in Cancer Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer Genomics and Diagnostics
Keywords
EGFR-mutant lung cancer, EGFR tyrosine kinase inhibitors, acquired drug resistance, erlotinib resistance, MET amplification, ERBB2 amplification, TP53 mutation, T790M mutation, BRAF fusion, FGFR3 fusion, time to progression
MeSH terms
Antineoplastic Agents, Humans, Lung Neoplasms, Mutation, Prognosis, Biomarkers, Tumor, Drug Resistance, Neoplasm, Genomics, Cell Line, Tumor, Protein Kinase Inhibitors, TOR Serine-Threonine Kinases, ErbB Receptors

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