Cited by 1,304Protein Kinase Regulation and GTPase SignalingMelanoma and MAPK PathwaysProtein Tyrosine Phosphatases

The DOI matches its Crossref record; 44 of the 44 references it cites were found in a registry or an index.

The KRASG12C Inhibitor MRTX849 Provides Insight toward Therapeutic Susceptibility of KRAS-Mutant Cancers in Mouse Models and Patients

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Abstract

Despite decades of research, efforts to directly target KRAS have been challenging. MRTX849 was identified as a potent, selective, and covalent KRASG12C inhibitor that exhibits favorable drug-like properties, selectively modifies mutant cysteine 12 in GDP-bound KRASG12C, and inhibits KRAS-dependent signaling. MRTX849 demonstrated pronounced tumor regression in 17 of 26 (65%) KRASG12C-positive cell line– and patient-derived xenograft models from multiple tumor types, and objective responses have been observed in patients with KRASG12C-positive lung and colon adenocarcinomas. Comprehensive pharmacodynamic and pharmacogenomic profiling in sensitive and partially resistant nonclinical models identified mechanisms implicated in limiting antitumor activity including KRAS nucleotide cycling and pathways that induce feedback reactivation and/or bypass KRAS dependence. These factors included activation of receptor tyrosine kinases (RTK), bypass of KRAS dependence, and genetic dysregulation of cell cycle. Combinations of MRTX849 with agents that target RTKs, mTOR, or cell cycle demonstrated enhanced response and marked tumor regression in several tumor models, including MRTX849-refractory models. Significance: The discovery of MRTX849 provides a long-awaited opportunity to selectively target KRASG12C in patients. The in-depth characterization of MRTX849 activity, elucidation of response and resistance mechanisms, and identification of effective combinations provide new insight toward KRAS dependence and the rational development of this class of agents. See related commentary by Klempner and Hata, p. 20. This article is highlighted in the In This Issue feature, p. 1

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Authors
Hallin, J., Engstrom, L. D., Hargis, L., Calinisan, A., Aranda, R., Briere, D. M., Sudhakar, N., Bowcut, V., Baer, B. R., Ballard, J. A., Burkard, M. R., Fell, J. B., Fischer, J. P., Vigers, G. P., Xue, Y., Gatto, S., Fernandez-Banet, J., Pavlicek, A., Velastagui, K., Chao, R. C., Barton, J., Pierobon, M., Baldelli, E., Patricoin, E. F., Cassidy, D. P., Marx, M. A., Rybkin, I. I., Johnson, M. L., Ou, S.-H. I., Lito, P., Papadopoulos, K. P., Jänne, P. A., Olson, P., & Christensen, J. G.
Affiliations
  • Mirati Therapeutics (United States) (US)
  • Array BioPharma (United States) (US)
  • 3Memorial Sloan Kettering Cancer Center, New York, New York.
  • 4Monoceros Biosystems LLC, San Diego, California.
  • George Mason University (US)
  • Dana-Farber Cancer Institute (US)
  • Henry Ford Hospital (US)
  • Tennessee Oncology (US)
  • University of California, Irvine (US)
  • Memorial Sloan Kettering Cancer Center (US)
  • South Texas Accelerated Research Therapeutics (US)
  • 6Dana-Farber Cancer Institute, Boston, Massachusetts.
Corresponding author
Christensen, James G.
Venue
Cancer Discovery
Published
2020-01-01
Volume
10
Issue
1
Pages
54-71
ISSN
  • 2159-8274 (ISSN-L)
  • 2159-8290
OpenAlex
W2982602983
Cited by
1,304
References
44
Citations by year
2026: 134 · 2025: 180 · 2024: 189 · 2023: 193 · 2022: 225 · 2021: 234 · 2020: 140
FWCI
50.69
Type
journal article
Language
en
Open access
Locations
  • Cancer Discovery (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
NIH NCI (1R01CA23074501, 1R01CA23026701A1, 1F30CA232549-01)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Melanoma and MAPK Pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Tyrosine Phosphatases
Keywords
adagrasib, KRAS-mutant cancer, drug resistance mechanisms, receptor tyrosine kinase activation, cell cycle dysregulation, lung adenocarcinoma, colon adenocarcinoma, patient-derived xenografts, pharmacogenomics, pharmacodynamics
MeSH terms
Adenocarcinoma of Lung, Acetonitriles, Animals, Antineoplastic Agents, Disease Models, Animal, Female, Humans, Lung Neoplasms, Mice, Inbred BALB C, Mice, Nude, Middle Aged, Mutation, Piperazines, Prognosis, Pyrimidines, Pyrrolidines, Tumor Cells, Cultured, Signal Transduction, Proto-Oncogene Proteins p21(ras), Mice, SCID, Mice, Inbred NOD, Apoptosis, Clinical Trials, Phase I as Topic, Xenograft Model Antitumor Assays, Cell Proliferation, Mice

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