Cited by 183Melanoma and MAPK PathwaysCancer Genomics and DiagnosticsProtein Kinase Regulation and GTPase Signaling

KRAS Allelic Imbalance Enhances Fitness and Modulates MAP Kinase Dependence in Cancer

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Burgess, Michael R., Hwang, Eugene, Mroue, Rana, Bielski, Craig M., Wandler, Anica M., Huang, Benjamin J., Firestone, Ari J., Young, Amy +14 more·2017·Cell

Abstract

Investigating therapeutic "outliers" that show exceptional responses to anti-cancer treatment can uncover biomarkers of drug sensitivity. We performed preclinical trials investigating primary murine acute myeloid leukemias (AMLs) generated by retroviral insertional mutagenesis in Kras G12D "knockin" mice with the MEK inhibitor PD0325901 (PD901). One outlier AML responded and exhibited intrinsic drug resistance at relapse. Loss of wild-type (WT) Kras enhanced the fitness of the dominant clone and rendered it sensitive to MEK inhibition. Similarly, human colorectal cancer cell lines with increased KRAS mutant allele frequency were more sensitive to MAP kinase inhibition, and CRISPR-Cas9-mediated replacement of WT KRAS with a mutant allele sensitized heterozygous mutant HCT116 cells to treatment. In a prospectively characterized cohort of patients with advanced cancer, 642 of 1,168 (55%) with KRAS mutations exhibited allelic imbalance. These studies demonstrate that serial genetic changes at the Kras/KRAS locus are frequent in cancer and modulate competitive fitness and MEK dependency.

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Crossref · 10.1016/j.cell.2017.01.020

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  • In mutant KRAS cells, the presence of the wildtype allele can drive resistance to downstream pathway inhibitors including MEK.

    “In mutant KRAS cells, the presence of the wildtype allele can drive resistance to downstream pathway inhibitors including MEK [108].”

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Authors
Burgess, M. R., Hwang, E., Mroue, R., Bielski, C. M., Wandler, A. M., Huang, B. J., Firestone, A. J., Young, A., Lacap, J. A., Crocker, L., Asthana, S., Davis, E. M., Xu, J., Akagi, K., Le Beau, M. M., Li, Q., Haley, B., Stokoe, D., Sampath, D., Taylor, B. S., Evangelista, M., & Shannon, K.
Affiliations
  • University of California, San Francisco (US)
  • Genentech (US)
  • Memorial Sloan Kettering Cancer Center (US)
  • University of Chicago (US)
  • The Ohio State University (US)
  • University of Michigan (US)
Corresponding author
  • Evangelista, Marie
  • Shannon, Kevin
Venue
Cell
Publisher
Elsevier BV
Published
2017-02
Volume
168
Issue
5
Pages
817-829.e15
ISSN
0092-8674 (ISSN-L)
OpenAlex
W2588657480
Cited by
183
References
51
Citations by year
2026: 7 · 2025: 11 · 2024: 18 · 2023: 18 · 2022: 12 · 2021: 33 · 2020: 25 · 2019: 35 · 2018: 13 · 2017: 11
FWCI
9.39
Type
journal article
Language
en
Open access
Locations
  • Cell (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
Funders
  • NIH (R01 CA180037, R37 CA72614, T32 CA108462, T32 CA128583, R01 CA207244, U54 OD202355, P30 CA0088748)
  • DOD NF1 Research Program (W81XWH-12-1-0157)
  • Rally Foundation for Childhood Cancer Research
  • The Truth 365
  • Leukemia and Lymphoma Society Specialized Center of Research (7019-04)
  • Ohio Supercomputer Center (PAS0425)
  • Cycle for Survival and the Josie Robertson Foundation (PF-14-146-01-LIB)
  • American Cancer Society – Hillcrest Committee (PF-14-070-01-TBG)
  • American Cancer Society (RP 10-078-01-TBE)
  • Damon Runyon Cancer Research Foundation (DRG-2149-13)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Melanoma and MAPK Pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer Genomics and Diagnostics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
Keywords
KRAS, allelic imbalance, MEK inhibition, MAPK signaling, drug resistance, acute myeloid leukemia, colorectal cancer, tumor fitness, clonal evolution, HCT116 cells, CRISPR/Cas9, PD0325901
MeSH terms
Animals, Antineoplastic Agents, Benzamides, Diphenylamine, Humans, Mutation, Retroviridae, Colorectal Neoplasms, Leukemia, Myeloid, Acute, Proto-Oncogene Proteins p21(ras), Drug Resistance, Neoplasm, MAP Kinase Signaling System, Cell Line, Tumor, Mice, Clonal Evolution

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