Cited by 529Protein Kinase Regulation and GTPase SignalingLung Cancer Treatments and MutationsMelanoma and MAPK Pathways

The DOI matches its Crossref record; 29 of the 29 references it cites were found in a registry or an index.

Clinical Acquired Resistance to KRASG12C Inhibition through a Novel KRAS Switch-II Pocket Mutation and Polyclonal Alterations Converging on RAS–MAPK Reactivation

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Abstract

Mutant-selective KRASG12C inhibitors, such as MRTX849 (adagrasib) and AMG 510 (sotorasib), have demonstrated efficacy in KRASG12C-mutant cancers, including non–small cell lung cancer (NSCLC). However, mechanisms underlying clinical acquired resistance to KRASG12C inhibitors remain undetermined. To begin to define the mechanistic spectrum of acquired resistance, we describe a patient with KRASG12C NSCLC who developed polyclonal acquired resistance to MRTX849 with the emergence of 10 heterogeneous resistance alterations in serial cell-free DNA spanning four genes (KRAS, NRAS, BRAF, MAP2K1), all of which converge to reactivate RAS–MAPK signaling. Notably, a novel KRASY96D mutation affecting the switch-II pocket, to which MRTX849 and other inactive-state inhibitors bind, was identified that interferes with key protein–drug interactions and confers resistance to these inhibitors in engineered and patient-derived KRASG12C cancer models. Interestingly, a novel, functionally distinct tricomplex KRASG12C active-state inhibitor RM-018 retained the ability to bind and inhibit KRASG12C/Y96D and could overcome resistance. Significance: In one of the first reports of clinical acquired resistance to KRASG12C inhibitors, our data suggest polyclonal RAS–MAPK reactivation as a central resistance mechanism. We also identify a novel KRAS switch-II pocket mutation that impairs binding and drives resistance to inactive-state inhibitors but is surmountable by a functionally distinct KRASG12C inhibitor. See related commentary by Pinnelli and Trusolino, p. 1874. This article is highlighted in the In This Issue feature, p. 1861

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Metadata

Authors
Tanaka, N., Lin, J. J., Li, C., Ryan, M. B., Zhang, J., Kiedrowski, L. A., Michel, A. G., Syed, M. U., Fella, K. A., Sakhi, M., Baiev, I., Juric, D., Gainor, J. F., Klempner, S. J., Lennerz, J. K., Siravegna, G., Bar-Peled, L., Hata, A. N., Heist, R. S., & Corcoran, R. B.
Affiliations
  • Harvard University (US)
  • Guardant (United States) (US)
  • Massachusetts General Hospital (US)
  • 1Massachusetts General Hospital Cancer Center and Department of Medicine, Harvard Medical School, Boston, Massachusetts.
Corresponding author
  • Hata, Aaron N.
  • Heist, Rebecca S.
  • Corcoran, Ryan B.
Venue
Cancer Discovery
Published
2021-04-06
Volume
11
Issue
8
Pages
1913-1922
ISSN
  • 2159-8274 (ISSN-L)
  • 2159-8290
OpenAlex
W3142010099
Cited by
527
References
29
Citations by year
2026: 85 · 2025: 100 · 2024: 124 · 2023: 91 · 2022: 86 · 2021: 41
FWCI
26.89
Type
journal article
Language
en
Open access
Locations
  • Cancer Discovery (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Revolution Medicines (RM-018)
  • Stand Up To Cancer—American Cancer Society Lung Cancer Dream Team Translational Research Grant (SU2C-AACR-DT17–15)
  • NIH (R01-CA164273, 1F32CA250231–01)
  • AACR (19–20–45-BARP)
  • Damon Runyon (DRR-62–20)
  • NIH NCI (R00 CA215249)
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, acquired drug resistance, switch-II pocket, adagrasib, sotorasib, non-small cell lung cancer, NRAS, BRAF, MEK1, drug-protein binding
MeSH terms
Acetonitriles, Aged, Antineoplastic Agents, Carcinoma, Non-Small-Cell Lung, Female, Humans, Lung Neoplasms, Neoplasm Metastasis, Piperazines, Pyridines, Pyrimidines, Proto-Oncogene Proteins p21(ras), Drug Resistance, Neoplasm

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