Evidence map›Paper›PMID 22945948›Full record

ArticleJournal of the National Cancer Institute2012

Identification of retinol binding protein 1 promoter hypermethylation in isocitrate dehydrogenase 1 and 2 mutant gliomas.

Arthur P Chou, Reshmi Chowdhury, Sichen Li, Weidong Chen, Andrew J Kim, David E Piccioni, Julia M Selfridge, Reema R Mody, Stephen Chang, Shadi Lalezari and 15 more

Open access · bronzeAbstract read
In one paragraph

Article in Journal of the National Cancer Institute, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
31citing papers in PubMed, 1 pooled it
3.3field-weighted citation impact, top 7% 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

31 citing papers in PubMed, 1 synthesis or guideline pooled it, 62 citations in OpenAlex.

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  14. Role of MDH2 pathogenic variant in pheochromocytoma and paraganglioma patients.Genetics in medicine : official journal of the American College of Medical Genetics · 2018
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  18. Potential role for all-International journal of hematologic oncology · 2016
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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

25 authors at 2 institutions in 1 country.

Arthur P ChouDepartment of Neurology, David Geffen School of Medicine at the University of California Los Angeles, 90095, USA.
Reshmi Chowdhury
Sichen Li
Weidong Chen
Andrew J Kim
David E Piccioni
Julia M Selfridge
Reema R Mody
Stephen Chang
Shadi Lalezari
Jeffrey Lin
Desiree E Sanchez
Ryan W Wilson
Matthew C Garrett
Bret Harry
Jack Mottahedeh
Phioanh L Nghiemphu
Harley I Kornblum
Paul S Mischel
Robert M Prins
William H Yong
Timothy Cloughesy
Stanley F Nelson
Linda M Liau
Albert Lai
University of California, Los Angeles · USZero to Three · US

Funding

Neural Progenitor Genes and Brain TumorsR01NS052563 · NINDS · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI KORNBLUM, HARLEY IAN · 2006 to 2015
$2.4M
UCLA Neurosurgery Research Training and Education ProgramR25NS079198 · NINDS · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI LIAU, LINDA M · 2012 to 2021
$1.2M
Genome-wide promoter methylation profiling of gliomaK08CA124479 · NCI · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI LAI, ALBERT · 2008 to 2012
$790k
NCI NIH HHS K08 CA124479NCI NIH HHS K08CA124479NINDS NIH HHS R01 NS052563NINDS NIH HHS R25 NS079198
6 · The paper itself

Abstract

backgroundMutations in isocitrate dehydrogenase 1 (IDH1) and associated CpG island hypermethylation represent early events in the development of low-grade gliomas and secondary glioblastomas. To identify candidate tumor suppressor genes whose promoter methylation may contribute to gliomagenesis, we compared methylation profiles of IDH1 mutant (MUT) and IDH1 wild-type (WT) tumors using massively parallel reduced representation bisulfite sequencing.

methodsReduced representation bisulfite sequencing was performed on ten pathologically matched WT and MUT glioma samples and compared with data from a methylation-sensitive restriction enzyme technique and data from The Cancer Genome Atlas (TCGA). Methylation in the gene retinol-binding protein 1 (RBP1) was identified in IDH1 mutant tumors and further analyzed with primer-based bisulfite sequencing. Correlation between IDH1/IDH2 mutation status and RBP1 methylation was evaluated with Spearman correlation. Survival data were collected retrospectively and analyzed with Kaplan-Meier and Cox proportional hazards analysis. All statistical tests were two-sided.

resultsMethylome analysis identified coordinated CpG island hypermethylation in IDH1 MUT gliomas, consistent with previous reports. RBP1, important in retinoic acid metabolism, was found to be hypermethylated in 76 of 79 IDH1 MUT, 3 of 3 IDH2 MUT, and 0 of 116 IDH1/IDH2 WT tumors. IDH1/IDH2 mutation was highly correlated with RBP1 hypermethylation (n = 198; Spearman R = 0.94, 95% confidence interval = 0.92 to 0.95, P < .001). The Cancer Genome Atlas showed IDH1 MUT tumors (n = 23) to be RBP1-hypermethylated with decreased RBP1 expression compared with WT tumors (n = 124). Among patients with primary glioblastoma, patients with RBP1-unmethylated tumors (n = 102) had decreased median overall survival compared with patients with RBP1-methylated tumors (n = 22) (20.3 months vs 36.8 months, respectively; hazard ratio of death = 2.48, 95% confidence interval = 1.30 to 4.75, P = .006).

conclusionRBP1 promoter hypermethylation is found in nearly all IDH1 and IDH2 mutant gliomas and is associated with improved patient survival. Because RBP1 is involved in retinoic acid synthesis, our results suggest that dysregulation of retinoic acid metabolism may contribute to glioma formation along the IDH1/IDH2-mutant pathway.

Indexed as

DNA MethylationMutationAdultAgedBiomarkers, TumorBlotting, WesternBrain NeoplasmsCpG IslandsDNA Mutational AnalysisFemaleGene Expression ProfilingGliomaHumansIsocitrate DehydrogenaseKaplan-Meier EstimateMaleBiomarkers, Tumorhydrogen sulfiteIDH1 protein, humanIDH2 protein, humanIsocitrate DehydrogenaseRBP1 protein, humanRetinol-Binding Proteins, CellularSulfitesTretinoin

Identifiers

PMID22945948
PMCPMC3529615
OpenAlexW2169043520

What OpenQuestion holds

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Registered trials

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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.