Evidence map›Paper›PMID 21059263›Full record

ArticleBMC cancer2010

Regulation of sonic hedgehog-GLI1 downstream target genes PTCH1, Cyclin D2, Plakoglobin, PAX6 and NKX2.2 and their epigenetic status in medulloblastoma and astrocytoma.

Mehdi H Shahi, Mohammad Afzal, Subrata Sinha, Charles G Eberhart, Juan A Rey, Xing Fan, Javier S Castresana

Open access · goldAbstract read
In one paragraph

Article in BMC cancer, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 51 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
51citing papers in PubMed, 1 pooled it
1.9field-weighted citation impact, top 14% 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

51 citing papers in PubMed, 1 synthesis or guideline pooled it, 88 citations in OpenAlex.

  1. Pooled it
  2. From developmental origins to relapse: molecular and therapeutic insights in medulloblastoma.Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery · 2026
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  18. The Role of Neurodevelopmental Pathways in Brain Tumors.Frontiers in cell and developmental biology · 2021
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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

7 authors at 4 institutions in 3 countries.

Mehdi H ShahiBrain Tumor Biology Unit-CIFA, University of Navarra School of Sciences, Pamplona, Spain.
Mohammad Afzal
Subrata Sinha
Charles G Eberhart
Juan A Rey
Xing Fan
Javier S Castresana
Universidad de Navarra · ESHospital Universitario La Paz · ESJohns Hopkins University · USUniversity of Michigan–Ann Arbor · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe Sonic hedgehog (Shh) signaling pathway is critical for cell growth and differentiation. Impairment of this pathway can result in both birth defects and cancer. Despite its importance in cancer development, the Shh pathway has not been thoroughly investigated in tumorigenesis of brain tumors. In this study, we sought to understand the regulatory roles of GLI1, the immediate downstream activator of the Shh signaling pathway on its downstream target genes PTCH1, Cyclin D2, Plakoglobin, NKX2.2 and PAX6 in medulloblastoma and astrocytic tumors.

methodsWe silenced GLI1 expression in medulloblastoma and astrocytic cell lines by transfection of siRNA against GLI1. Subsequently, we performed RT-PCR and quantitative real time RT-PCR (qRT-PCR) to assay the expression of downstream target genes PTCH1, Cyclin D2, Plakoglobin, NKX2.2 and PAX6. We also attempted to correlate the pattern of expression of GLI1 and its regulated genes in 14 cell lines and 41 primary medulloblastoma and astrocytoma tumor samples. We also assessed the methylation status of the Cyclin D2 and PTCH1 promoters in these 14 cell lines and 58 primary tumor samples.

resultsSilencing expression of GLI1 resulted up-regulation of all target genes in the medulloblastoma cell line, while only PTCH1 was up-regulated in astrocytoma. We also observed methylation of the cyclin D2 promoter in a significant number of astrocytoma cell lines (63%) and primary astrocytoma tumor samples (32%), but not at all in any medulloblastoma samples. PTCH1 promoter methylation was less frequently observed than Cyclin D2 promoter methylation in astrocytomas, and not at all in medulloblastomas.

conclusionsOur results demonstrate different regulatory mechanisms of Shh-GLI1 signaling. These differences vary according to the downstream target gene affected, the origin of the tissue, as well as epigenetic regulation of some of these genes.

Indexed as

Epigenesis, GeneticGene Expression Regulation, NeoplasticAstrocytesAstrocytomaBrain NeoplasmsCyclin D2Eye Proteinsgamma CateninHedgehog ProteinsHomeobox Protein Nkx-2.2Homeodomain ProteinsHumansMedulloblastomaNuclear ProteinsPaired Box Transcription FactorsPatched-1 ReceptorCyclin D2Eye Proteinsgamma CateninGLI1 protein, humanHedgehog ProteinsHomeobox Protein Nkx-2.2Homeodomain Proteinsnkx2.2b protein, zebrafishNKX2-2 protein, humanNuclear ProteinsPaired Box Transcription FactorsPatched-1 ReceptorPatched ReceptorsPAX6 protein, humanPAX6 Transcription FactorPTCH1 protein, humanReceptors, Cell SurfaceRepressor ProteinsRNA, Small InterferingSHH protein, humanTranscription FactorsZebrafish ProteinsZinc Finger Protein GLI1

Identifiers

PMID21059263
PMCPMC2989332
OpenAlexW2167264976

What OpenQuestion holds

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LicenceCC BY
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.