Evidence map›Paper›PMID 25329694›Full record

ArticleThe Journal of clinical investigation2014

BRAF inhibitor-associated ERK activation drives development of chronic lymphocytic leukemia.

Niuscha Yaktapour, Frank Meiss, Justin Mastroianni, Thorsten Zenz, Hana Andrlova, Nimitha R Mathew, Rainer Claus, Barbara Hutter, Stefan Fröhling, Benedikt Brors and 9 more

Abstract readCase Reports
In one paragraph

Article in The Journal of clinical investigation, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 36 papers.

0numbers the graph read from it
0cells of the map it votes in
36citing papers in PubMed
4.8field-weighted citation impact, top 4% 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

36 citing papers in PubMed, 65 citations in OpenAlex.

  1. Article
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  8. Article
  9. Biology and Treatment of Hairy Cell Leukemia.Current treatment options in oncology · 2020
    Review
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  11. Article
  12. Article
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  15. [BRAF gene mutations in ameloblastic fibromas].Beijing da xue xue bao. Yi xue ban = Journal of Peking University. Health sciences · 2019
    Article
  16. Article
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

19 authors at 6 institutions in 2 countries.

Niuscha Yaktapour
Frank Meiss
Justin Mastroianni
Thorsten Zenz
Hana Andrlova
Nimitha R Mathew
Rainer Claus
Barbara Hutter
Stefan Fröhling
Benedikt Brors
Dietmar Pfeifer
Milena Pantic
Ingrid Bartsch
Timo S Spehl
Philipp T Meyer
Justus Duyster
Katja Zirlik
Tilman Brummer
Robert Zeiser
University Medical Center Freiburg · DENational Center for Tumor Diseases · DEDKFZ-ZMBH Alliance · DEGerman Cancer Research Center · DEInstitute for Molecular Medicine · USUniversity of Freiburg · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Patients with BRAFV600E/K-driven melanoma respond to the BRAF inhibitor vemurafenib due to subsequent deactivation of the proliferative RAS/RAF/MEK/ERK pathway. In BRAF WT cells and those with mutations that activate or result in high levels of the BRAF activator RAS, BRAF inhibition can lead to ERK activation, resulting in tumorigenic transformation. We describe a patient with malignant melanoma who developed chronic lymphocytic leukemia (CLL) in the absence of RAS mutations during vemurafenib treatment. BRAF inhibition promoted patient CLL proliferation in culture and in murine xenografts and activated MEK/ERK in primary CLL cells from additional patients. BRAF inhibitor-driven ERK activity and CLL proliferation required B cell antigen receptor (BCR) activation, as inhibition of the BCR-proximal spleen tyrosine kinase (SYK) reversed ERK hyperactivation and proliferation of CLL cells from multiple patients, while inhibition of the BCR-distal Bruton tyrosine kinase had no effect. Additionally, the RAS-GTP/RAS ratio in primary CLL cells exposed to vemurafenib was reduced upon SYK inhibition. BRAF inhibition increased mortality and CLL expansion in mice harboring CLL xenografts; however, SYK or MEK inhibition prevented CLL proliferation and increased animal survival. Together, these results suggest that BRAF inhibitors promote B cell malignancies in the absence of obvious mutations in RAS or other receptor tyrosine kinases and provide a rationale for combined BRAF/MEK or BRAF/SYK inhibition.

Indexed as

Antineoplastic AgentsCell Line, TumorCell ProliferationCell SurvivalExtracellular Signal-Regulated MAP KinasesHumansIndolesIntracellular Signaling Peptides and ProteinsLeukemia, Lymphocytic, Chronic, B-CellMAP Kinase Signaling SystemMelanomaMiddle AgedMutation, MissensePhosphorylationProtein Processing, Post-TranslationalProtein-Tyrosine KinasesAntineoplastic AgentsBRAF protein, humanExtracellular Signal-Regulated MAP KinasesIndolesIntracellular Signaling Peptides and ProteinsProtein-Tyrosine KinasesProto-Oncogene Proteins B-rafSulfonamidesSyk KinaseSYK protein, humanSyk protein, mouseVemurafenib

Identifiers

PMID25329694
PMCPMC4347247
OpenAlexW2130375238

What OpenQuestion holds

Textmetadata
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.