Evidence map›Paper›PMID 27653222›Full record

ArticleJournal of neurosurgical anesthesiology2017

A Dexamethasone-regulated Gene Signature Is Prognostic for Poor Survival in Glioblastoma Patients.

Markus M Luedi, Sanjay K Singh, Jennifer C Mosley, Masumeh Hatami, Joy Gumin, Erik P Sulman, Frederick F Lang, Frank Stueber, Pascal O Zinn, Rivka R Colen

Open access · greenAbstract read
In one paragraph

Article in Journal of neurosurgical anesthesiology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed, 1 pooled it
2.2field-weighted citation impact, top 12% 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

23 citing papers in PubMed, 1 synthesis or guideline pooled it, 35 citations in OpenAlex.

  1. Pooled it
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    Review
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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

10 authors at 5 institutions in 2 countries.

Markus M Luedi*Department of Anesthesiology, Bern University Hospital Inselspital, Bern, Switzerland Departments of †Cancer Systems Imaging ‡Diagnostic Imaging §Neurosurgery and Brain Tumor Center ∥Radiation Oncology, Division of Radiation Oncology #Neurosurgery, Cancer Systems Imaging, and Cancer Biology **Cancer Systems Imaging, and Diagnostic Imaging, The University of Texas MD Anderson Cancer Center ¶Department of Neurosurgery, Baylor College of Medicine, Houston, TX.
Sanjay K Singh
Jennifer C Mosley
Masumeh Hatami
Joy Gumin
Erik P Sulman
Frederick F Lang
Frank Stueber
Pascal O Zinn
Rivka R Colen
Pediatric Brain Tumor Foundation · USUniversity Hospital of Bern · CHBaylor College of Medicine · USRadiation Oncology Associates · USThe University of Texas MD Anderson Cancer Center · US

Funding

Tropism Enhanced Oncolytic Adenovirus for the Treatment of Brain TumorsP50CA127001 · NCI · UNIVERSITY OF TX MD ANDERSON CAN CTR · PI Juan Fueyo · 2008 to 2026
$41.2M
NCI NIH HHS P50 CA127001
6 · The paper itself

Abstract

backgroundDexamethasone is reported to induce both tumor-suppressive and tumor-promoting effects. The purpose of this study was to identify the genomic impact of dexamethasone in glioblastoma stem cell (GSC) lines and its prognostic value; furthermore, to identify drugs that can counter these side effects of dexamethasone exposure.

methodsWe utilized 3 independent GSC lines with tumorigenic potential for this study. Whole-genome expression profiling and pathway analyses were done with dexamethasone-exposed and control cells. GSCs were also co-exposed to dexamethasone and temozolomide. Risk scores were calculated for most affected genes, and their associations with survival in The Cancer Genome Atlas and Repository of Molecular Brain Neoplasia Data databases. In silico Connectivity Map analysis identified camptothecin as antagonist to dexamethasone-induced negative effects.

resultsPathway analyses predicted an activation of dexamethasone network (z-score: 2.908). Top activated canonical pathways included "role of breast cancer 1 in DNA damage response" (P=1.07E-04). GSCs were protected against temozolomide-induced apoptosis when coincubated with dexamethasone. Altered cellular functions included cell movement, cell survival, and apoptosis with z-scores of 2.815, 5.137, and -3.122, respectively. CCAAT/enhancer binding protein beta (CEBPB) was activated in a dose dependent manner specifically in slow-dividing "stem-like" cells. CEBPB was activated in dexamethasone-treated orthotopic tumors. Patients with high risk scores had significantly shorter survival. Camptothecin was validated as potential partial neutralizer of dexamethasone-induced oncogenic effects.

conclusionsDexamethasone exposure induces a genetic program and CEBPB expression in GSCs that adversely affects key cellular functions and response to therapeutics. High risk scores associated with these genes have negative prognostic value in patients. Our findings further suggest camptothecin as a potential neutralizer of adverse dexamethasone-mediated effects.

Indexed as

AnimalsAntineoplastic Agents, HormonalApoptosisBlotting, WesternBrain NeoplasmsCell Line, TumorCell SurvivalDexamethasoneFlow CytometryGene Expression Regulation, NeoplasticGlioblastomaHumansMicePrognosisStem CellsSurvival AnalysisAntineoplastic Agents, HormonalDexamethasone

Identifiers

PMID27653222
PMCPMC5143186
OpenAlexW2522506351

What OpenQuestion holds

Textmetadata
LicenceTDM
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.