Cited by 278Melanoma and MAPK PathwaysProtein Kinase Regulation and GTPase SignalingProtein Tyrosine Phosphatases

Transcriptional Pathway Signatures Predict MEK Addiction and Response to Selumetinib (AZD6244)

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Dry, Jonathan R., Pavey, Sandra, Pratilas, Christine A., Harbron, Chris, Runswick, Sarah, Hodgson, Darren, Chresta, Christine, McCormack, Rose +21 more·2010·Cancer Research

Published version of a preprint

Abstract

Selumetinib (AZD6244, ARRY-142886) is a selective, non–ATP-competitive inhibitor of mitogen-activated protein/extracellular signal–regulated kinase kinase (MEK)-1/2. The range of antitumor activity seen preclinically and in patients highlights the importance of identifying determinants of response to this drug. In large tumor cell panels of diverse lineage, we show that MEK inhibitor response does not have an absolute correlation with mutational or phospho-protein markers of BRAF/MEK, RAS, or phosphoinositide 3-kinase (PI3K) activity. We aimed to enhance predictivity by measuring pathway output through coregulated gene networks displaying differential mRNA expression exclusive to resistant cell subsets and correlated to mutational or dynamic pathway activity. We discovered an 18-gene signature enabling measurement of MEK functional output independent of tumor genotype. Where the MEK pathway is activated but the cells remain resistant to selumetinib, we identified a 13-gene signature that implicates the existence of compensatory signaling from RAS effectors other than PI3K. The ability of these signatures to stratify samples according to functional activation of MEK and/or selumetinib sensitivity was shown in multiple independent melanoma, colon, breast, and lung tumor cell lines and in xenograft models. Furthermore, we were able to measure these signatures in fixed archival melanoma tumor samples using a single RT-qPCR–based test and found intergene correlations and associations with genetic markers of pathway activity to be preserved. These signatures offer useful tools for the study of MEK biology and clinical application of MEK inhibitors, and the novel approaches taken may benefit other targeted therapies. Cancer Res; 70(6); 2264–73

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Crossref · 10.1158/0008-5472.can-09-1577

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  • The 13-gene signature was developed from cell lines treated with MEKi for 72 h, during which adaptive resistance could be induced.

    “It is noteworthy that the 13-gene signature was developed from cell lines treated with the MEKi for a 72 h period [6] during which AR could be induced [11].”

    From An integrative gene expression signature analysis identifies CMS4 KRAS-mutated colorectal cancers sensitive to combined MEK and SRC targeted therapy (2022) · cites this paper as [6]

    The Results (Generation of novel candidate multivariate markers) report that the authors identified a 13-gene compensatory-resistance signature. But Materials and Methods (Cell culture and cell viability assays) describes 72 hours as the period used to measure drug effects on cell growth, not as the treatment period from which the signature was developed; it describes a separate drug-treated panel exposed for 8 hours. The adaptive-resistance clause is attached to a different citation and is not assessed here. Page numbers are unavailable in our copy. (LLM, conf=0.90)

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  • RAS/RAF-mutated CRC targeted therapies have been largely ineffective, likely due to complex resistance mechanisms such as intrinsic and adaptive resistance.

    “Although RAS/RAF-mutated CRC has been targeted for the development of therapeutic inhibitors, they have been largely ineffective, likely due to complex resistance mechanisms such as intrinsic and adaptive resistance [5–12].”

    From An integrative gene expression signature analysis identifies CMS4 KRAS-mutated colorectal cancers sensitive to combined MEK and SRC targeted therapy (2022) · cites this paper as [6]

    The Introduction and Discussion describe MEK-targeted treatment and complex compensatory mechanisms that can make tumor cells resistant. The Results also test response in colorectal cell lines. The paper does not establish that therapies for RAS/RAF-mutated colorectal cancer have been largely ineffective clinically, or identify adaptive resistance as a cause of that broad outcome. (LLM, conf=0.85)

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  • MEK inhibitors, used alone, have been largely ineffective, likely due to intrinsic and adaptive resistance mechanisms.

    “However, MEK inhibitors, used alone, have been largely ineffective, likely due to intrinsic and adaptive resistance mechanisms [5–7].”

    From An integrative gene expression signature analysis identifies CMS4 KRAS-mutated colorectal cancers sensitive to combined MEK and SRC targeted therapy (2022) · cites this paper as [6]

    The Discussion (page unavailable) describes resistance to MEK inhibitors through compensatory signaling, and the Results distinguish selumetinib-sensitive from resistant cell lines. The paper does not establish that MEK inhibitors used alone have been largely ineffective overall, or specifically attribute such an outcome to both intrinsic and adaptive resistance. (LLM, conf=0.83)

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Research works printed but not linked: 1

  1. [23]Xing F Pratilas C Persaud Y Genetic predictors of MEK dependence in V600 BRAF mutant melanoma 2009 Proceedings of the 100th Annual Meeting of the American Association for Cancer Research Apr 18–22 Denver, Colorado

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Authors
Dry, J. R., Pavey, S., Pratilas, C. A., Harbron, C., Runswick, S., Hodgson, D., Chresta, C., McCormack, R., Byrne, N., Cockerill, M., Graham, A., Beran, G., Cassidy, A., Haggerty, C., Brown, H., Ellison, G., Dering, J., Taylor, B. S., Stark, M., Bonazzi, V., Ravishankar, S., Packer, L., Xing, F., Solit, D. B., Finn, R. S., Rosen, N., Hayward, N. K., French, T., & Smith, P. D.
Affiliations
AstraZeneca (United Kingdom) (GB)
Corresponding author
Dry, Jonathan R.
Venue
Cancer Research
Published
2010-03-14
Volume
70
Issue
6
Pages
2264-2273
ISSN
  • 0008-5472 (ISSN-L)
  • 1538-7445
OpenAlex
W2128445526
Cited by
262
References
46
Citations by year
2026: 7 · 2025: 11 · 2024: 11 · 2023: 23 · 2022: 13 · 2021: 11 · 2020: 11 · 2019: 17 · 2018: 16 · 2017: 22 · 2016: 17 · 2015: 14 · 2014: 16 · 2013: 23 · 2012: 23
FWCI
9.50
Type
journal article
Language
en
Open access
Locations
  • Cancer Research (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Cancer Institute (K08CA127350)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Melanoma and MAPK Pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Tyrosine Phosphatases
Keywords
selumetinib, MEK inhibitors, drug resistance, gene expression signatures, phosphatidylinositol 3-kinase, melanoma, cancer cell lines, xenograft models, predictive biomarkers, targeted therapy
MeSH terms
Benzimidazoles, Humans, Neoplasms, Phosphatidylinositol 3-Kinases, Reverse Transcriptase Polymerase Chain Reaction, Gene Expression Profiling, MAP Kinase Kinase Kinases, MAP Kinase Signaling System, Cell Line, Tumor, Proto-Oncogene Proteins B-raf, Proto-Oncogene Proteins c-akt, PTEN Phosphohydrolase

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