Evidence map›Paper›PMID 22394497›Full record

ArticleNeuro-oncology2012

Expression of podoplanin in human astrocytic brain tumors is controlled by the PI3K-AKT-AP-1 signaling pathway and promoter methylation.

Heike Peterziel, Julia Müller, Andreas Danner, Sebastian Barbus, Hai-Kun Liu, Bernhard Radlwimmer, Torsten Pietsch, Peter Lichter, Günther Schütz, Jochen Hess and 1 more

Open access · bronzeAbstract read
In one paragraph

Article in Neuro-oncology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 43 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
43citing papers in PubMed, 1 pooled it
2.7field-weighted citation impact, top 9% 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

43 citing papers in PubMed, 1 synthesis or guideline pooled it, 68 citations in OpenAlex.

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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

11 authors at 1 institution in 1 country.

Heike PeterzielDivisions of Signal Transduction and Growth Control, DKFZ/ZMBH Alliance, Heidelberg, Germany. h.peterziel@dkfz.de
Julia Müller
Andreas Danner
Sebastian Barbus
Hai-Kun Liu
Bernhard Radlwimmer
Torsten Pietsch
Peter Lichter
Günther Schütz
Jochen Hess
Peter Angel
University of Bonn · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Recently, we found strong overexpression of the mucin-type glycoprotein podoplanin (PDPN) in human astrocytic brain tumors, specifically in primary glioblastoma multiforme (GB). In the current study, we show an inverse correlation between PDPN expression and PTEN levels in primary human GB and glioma cell lines, and we report elevated PDPN protein levels in the subventricular zone of brain tissue sections of PTEN-deficient mice. In human glioma cells lacking functional PTEN, reintroduction of wild-type PTEN, inhibition of the PTEN downstream target protein kinase B/AKT, or interference with transcription factor AP-1 function resulted in efficient downregulation of PDPN expression. In addition, we observed hypoxia-dependent PDPN transcriptional control and demonstrated that PDPN expression is subject to negative transcriptional regulation by promoter methylation in human GB and in glioma cell lines. Treatment of PTEN-negative glioma cells with demethylating agents induced expression of PDPN. Together, our findings show that increased PDPN expression in human GB is caused by loss of PTEN function and activation of the PI3K-AKT-AP-1 signaling pathway, accompanied by epigenetic regulation of PDPN promoter activity. Silencing of PDPN expression leads to reduced proliferation and migration of glioma cells, suggesting a functional role of PDPN in glioma progression and malignancy. Thus, specific targeting of PDPN expression and/or function could be a promising strategy for the treatment of patients with primary GB.

Indexed as

Gene Expression Regulation, NeoplasticAnimalsAstrocytomaBrain NeoplasmsDNA MethylationDown-RegulationGlioblastomaGliomaHumansMembrane GlycoproteinsMicePhosphatidylinositol 3-KinasesPodoplaninPromoter Regions, GeneticProto-Oncogene Proteins c-aktPTEN PhosphohydrolaseMembrane GlycoproteinsPDPN protein, humanPhosphatidylinositol 3-KinasesPodoplaninProto-Oncogene Proteins c-aktPTEN PhosphohydrolasePTEN protein, humanTranscription Factor AP-1

Identifiers

PMID22394497
PMCPMC3309862
OpenAlexW2169472843

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.