Evidence map›Paper›PMID 28392842›Full record

ArticleClinical epigenetics2017

DNA methylation signatures for 2016 WHO classification subtypes of diffuse gliomas.

Yashna Paul, Baisakhi Mondal, Vikas Patil, Kumaravel Somasundaram

Abstract read
In one paragraph

Article in Clinical epigenetics, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed, 1 pooled it
–field-weighted citation impact
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

15 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Blood DNA methylation as a potential biomarker of dementia: A systematic review.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2018
    Pooled it
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  13. The intertwined fates of inflammation and coagulation in glioma.Mammalian genome : official journal of the International Mammalian Genome Society · 2018
    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

4 authors.

Yashna Paul *Department of Microbiology and Cell Biology, Indian Institute of Science, Bangalore, 560012 India.
Baisakhi Mondal *Department of Microbiology and Cell Biology, Indian Institute of Science, Bangalore, 560012 India.
Vikas PatilDepartment of Microbiology and Cell Biology, Indian Institute of Science, Bangalore, 560012 India.
Kumaravel SomasundaramDepartment of Microbiology and Cell Biology, Indian Institute of Science, Bangalore, 560012 India.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundGlioma is the most common of all primary brain tumors with poor prognosis and high mortality. The 2016 World Health Organization classification of the tumors of central nervous system uses molecular parameters in addition to histology to redefine many tumor entities. The new classification scheme divides diffuse gliomas into low-grade glioma (LGG) and glioblastoma (GBM) as per histology. LGGs are further divided into isocitrate dehydrogenase (IDH) wild type or mutant, which is further classified into either oligodendroglioma that harbors 1p/19q codeletion or diffuse astrocytoma that has an intact 1p/19q loci but enriched for ATRX loss and TP53 mutation. GBMs are divided into IDH wild type that corresponds to primary or de novo GBMs and IDH mutant that corresponds to secondary or progressive GBMs. To make the 2016 WHO subtypes of diffuse gliomas more robust, we carried out Prediction Analysis of Microarrays (PAM) to develop DNA methylation signatures for these subtypes.

resultsIn this study, we applied PAM on a training set of diffuse gliomas derived from The Cancer Genome Atlas (TCGA) and identified DNA methylation signatures to classify LGG IDH wild type from LGG IDH mutant, LGG IDH mutant with 1p/19q codeletion from LGG IDH mutant with intact 1p/19q loci and GBM IDH wild type from GBM IDH mutant with an accuracy of 99-100%. The signatures were validated using the test set of diffuse glioma samples derived from TCGA with an accuracy of 96 to 99%. In addition, we also carried out additional validation of all three signatures using independent LGG and GBM cohorts. Further, the methylation signatures identified a fraction of samples as discordant, which were found to have molecular and clinical features typical of the subtype as identified by methylation signatures.

conclusionsThus, we identified methylation signatures that classified different subtypes of diffuse glioma accurately and propose that these signatures could complement 2016 WHO classification scheme of diffuse glioma.

Indexed as

DNA MethylationBrain NeoplasmsCpG IslandsDatabases, GeneticEpigenesis, GeneticGliomaHumansIsocitrate DehydrogenaseOligonucleotide Array Sequence AnalysisTumor Suppressor Protein p53World Health OrganizationX-linked Nuclear ProteinATRX protein, humanIsocitrate DehydrogenaseTP53 protein, humanTumor Suppressor Protein p53X-linked Nuclear Protein2016 WHODNA methylation classification signatureGliomaIDH1/IDH2 mutationPAMPCA

Identifiers

PMID28392842
PMCPMC5379538

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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.