Cited by 562Melanoma and MAPK PathwaysProtein Kinase Regulation and GTPase SignalingProtein Tyrosine Phosphatases

Relief of profound feedback inhibition of mitogenic signaling by RAF inhibitors attenuates their activity in BRAFV600E melanomas

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Lito, Piro, Pratilas, Christine A., Joseph, Eric W., Tadi, Madhavi, Halilovic, Ensar, Zubrowski, Matthew, Huang, Alan, Wong, Wai Lin +8 more·2012·Cancer Cell

Abstract

BRAF(V600E) drives tumors by dysregulating ERK signaling. In these tumors, we show that high levels of ERK-dependent negative feedback potently suppress ligand-dependent mitogenic signaling and Ras function. BRAF(V600E) activation is Ras independent and it signals as a RAF-inhibitor-sensitive monomer. RAF inhibitors potently inhibit RAF monomers and ERK signaling, causing relief of ERK-dependent feedback, reactivation of ligand-dependent signal transduction, increased Ras-GTP, and generation of RAF-inhibitor-resistant RAF dimers. This results in a rebound in ERK activity and culminates in a new steady state, wherein ERK signaling is elevated compared to its initial nadir after RAF inhibition. In this state, ERK signaling is RAF inhibitor resistant, and MEK inhibitor sensitive, and combined inhibition results in enhancement of ERK pathway inhibition and antitumor activity.

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Crossref · 10.1016/j.ccr.2012.10.009

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  • Recent research raises concerns about release of upstream RTK and Ras signals that activate reciprocal growth-promoting signaling pathways, such as PI3K/AKT/mTORC1, in preclinical melanoma models.

    “recent research raises concerns about the release of upstream RTK and Ras signals that activate reciprocal growth-promoting signaling pathways, such as the PI3K/AKT/mTORC1 pathway in preclinical melanoma models.89”

    From Overcoming Resistance to Drugs Targeting KRAS Mutation (2020) · cites this paper as [89]

  • RNA sequencing revealed that KRAS (G12C) inhibition causes significant repression of DUSP, SPRY, and PHLDA family genes known as negative regulators of the MAPK pathway.

    “RNA sequencing revealed that KRAS (G12C) inhibition causes significant repression of DUSP, SPRY, and PHLDA family genes known as negative regulators of MAPK pathway [115, 116].”
  • Potent inhibitors of RAS-RAF-MEK-ERK signaling silence ERK phosphorylation, but interruption of feedback circuits can cause rebound ERK activity.

    “although potent inhibitors of RAS-RAF-MEK-ERK signaling efficiently silence ERK phosphorylation, interruption of feedback circuits can result in rebound of ERK activity (110)”

    From Targeting CDK4 and CDK6: From Discovery to Therapy (2016) · cites this paper as [110]

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Authors
Lito, P., Pratilas, C. A., Joseph, E. W., Tadi, M., Halilovic, E., Zubrowski, M., Huang, A., Wong, W. L., Callahan, M. K., Merghoub, T., Wolchok, J. D., de Stanchina, E., Chandarlapaty, S., Poulikakos, P. I., Fagin, J. A., & Rosen, N.
Affiliations
Memorial Sloan Kettering Cancer Center (US)
Corresponding author
Rosen, Neal
Venue
Cancer Cell
Publisher
Elsevier BV
Published
2012-11
Volume
22
Issue
5
Pages
668-682
ISSN
1535-6108 (ISSN-L)
OpenAlex
W2041255253
Cited by
562
References
45
Citations by year
2026: 26 · 2025: 18 · 2024: 29 · 2023: 53 · 2022: 45 · 2021: 34 · 2020: 40 · 2019: 39 · 2018: 39 · 2017: 52 · 2016: 47 · 2015: 50 · 2014: 52 · 2013: 35 · 2012: 3
FWCI
17.98
Type
journal article
Language
en
Open access
Locations
  • Cancer Cell (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health (K08-CA127350, P01-CA129243)
  • Dana Foundation
  • Melanoma Research Alliance
  • Harry J. Lloyd Charitable Trust
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
BRAF V600E melanoma, RAF inhibitors, ERK signaling, negative feedback inhibition, RAF dimerization, Ras-GTP, MEK inhibitors, RAF inhibitor resistance, combination therapy
MeSH terms
Vemurafenib, Epidermal Growth Factor, Fibroblast Growth Factors, Humans, Indoles, Ligands, Melanoma, Membrane Proteins, Sulfonamides, Gene Expression Regulation, Neoplastic, Hepatocyte Growth Factor, Receptors, Growth Factor, ras Proteins, Neuregulins, MAP Kinase Signaling System, Cell Line, Tumor, Intracellular Signaling Peptides and Proteins, Extracellular Signal-Regulated MAP Kinases, Proto-Oncogene Proteins B-raf

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