Evidence map›Paper›PMID 26351322›Full record

ArticleMolecular cancer therapeutics2015

Combined Pan-RAF and MEK Inhibition Overcomes Multiple Resistance Mechanisms to Selective RAF Inhibitors.

Steven R Whittaker, Glenn S Cowley, Steve Wagner, Flora Luo, David E Root, Levi A Garraway

Open access · greenAbstract read
In one paragraph

Article in Molecular cancer therapeutics, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 52 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
52citing papers in PubMed, 2 pooled it
4.2field-weighted citation impact, top 5% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

52 citing papers in PubMed, 2 syntheses or guidelines pooled it, 71 citations in OpenAlex.

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  20. Resistance mechanisms in BRAFFrontiers in oncology · 2022
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 2 institutions in 2 countries.

Steven R WhittakerDepartment of Medical Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts. The Broad Institute, Cambridge, Massachusetts. Division of Cancer Therapeutics, Institute of Cancer Research, London, United Kingdom.
Glenn S CowleyThe Broad Institute, Cambridge, Massachusetts.
Steve WagnerDivision of Cancer Therapeutics, Institute of Cancer Research, London, United Kingdom.
Flora LuoDepartment of Medical Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts. The Broad Institute, Cambridge, Massachusetts.
David E RootThe Broad Institute, Cambridge, Massachusetts.
Levi A GarrawayDepartment of Medical Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts. The Broad Institute, Cambridge, Massachusetts. Center for Cancer Genome Discovery, Dana-Farber Cancer Institute, Boston, Massachusetts. Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts. levi_garraway@dfci.harvard.edu.
Broad Institute · USInstitute of Cancer Research · GB

Funding

Tissue and Pathology ResourcesP50CA127003 · NCI · DANA-FARBER CANCER INST · PI EL-BARDEESY, NABEEL, SELLERS, WILLIAM R · 2007 to 2023
$33.2M
Transcriptional mechanisms and melanomaP01CA163222 · NCI · MASSACHUSETTS GENERAL HOSPITAL · PI David Liu · 2013 to 2026
$25.3M
Defining Melanoma Therapeutic Avenues by Integrative Functional GenomicsDP2OD002750 · OD · DANA-FARBER CANCER INST · PI GARRAWAY, LEVI ALEXANDER · 2007 to 2007
$2.6M
High-Throughput Tumor Genomic Profiling by Massively Parallel SequencingR33CA155554 · NCI · DANA-FARBER CANCER INST · PI GARRAWAY, LEVI A., MACCONAILL, LAURA E · 2011 to 2013
$717k
NCI NIH HHS 5P50CA127003-05NCI NIH HHS P01 CA163222NCI NIH HHS P50 CA127003NCI NIH HHS R33 CA155554NIH HHS DP2 OD002750NIH HHS DP2OD002750
6 · The paper itself

Abstract

RAF and MEK inhibitors are effective in BRAF-mutant melanoma but not in BRAF-mutant colorectal cancer. To gain additional insights into this difference, we performed a genome-scale pooled shRNA enhancer screen in a BRAF-mutant, RAF inhibitor-resistant colorectal cancer cell line exposed to the selective RAF inhibitor PLX4720. We identified multiple genes along the receptor tyrosine kinase (RTK)/mitogen-activated protein kinase (MAPK) signaling axis that, when suppressed, either genetically or pharmacologically, sensitized cells to the selective RAF inhibitor through sustained inhibition of MAPK signaling. Strikingly, CRAF was a key mediator of resistance that could be overcome by the use of pan-RAF inhibitors in combination with a MEK inhibitor. Furthermore, the combination of pan-RAF and MEK inhibitors displayed strong synergy in melanoma and colorectal cancer cell lines with RAS-activating events such as RTK activation, KRAS mutation, or NF1 loss-of-function mutations. Combinations of selective RAF inhibitors, such as PLX4720 or dabrafenib, with MEK inhibitors did not incur such profound synergy, suggesting that inhibition of CRAF by pan-RAF inhibitors plays a key role in determining cellular response. Importantly, in contrast to the modest activity seen with single-agent treatment, dual pan-RAF and MEK inhibition results in the induction of apoptosis, greatly enhancing efficacy. Notably, combined pan-RAF and MEK inhibition can overcome intrinsic and acquired resistance to single-agent RAF/MEK inhibition, supporting dual pan-RAF and MEK inhibition as a novel therapeutic strategy for BRAF- and KRAS-mutant cancers.

Indexed as

ApoptosisCell Line, TumorColorectal NeoplasmsDrug Resistance, NeoplasmHumansIndolesMAP Kinase Kinase KinasesMAP Kinase Signaling SystemMutationProtein Kinase InhibitorsProto-Oncogene Proteins B-rafProto-Oncogene Proteins p21(ras)raf KinasesSulfonamidesBRAF protein, humanIndolesKRAS protein, humanMAP Kinase Kinase KinasesPLX 4720Protein Kinase InhibitorsProto-Oncogene Proteins B-rafProto-Oncogene Proteins p21(ras)raf KinasesSulfonamides

Identifiers

PMID26351322
PMCPMC4674359
OpenAlexW1852944023

What OpenQuestion holds

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Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.