Evidence map›Paper›PMID 12234381›Full record

ArticleMolecular cancer2002

Reactivation of a silenced H19 gene in human rhabdomyosarcoma by demethylation of DNA but not by histone hyperacetylation.

Catherine A Lynch, Benjamin Tycko, Timothy H Bestor, Colum P Walsh

Abstract read
In one paragraph

Article in Molecular cancer, 2002. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed
6.5field-weighted citation impact, top 3% 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

18 citing papers in PubMed, 254 citations in OpenAlex.

  1. Article
  2. Review
  3. Article
  4. Review
  5. Review
  6. Long noncoding RNA H19 - a new player in the pathogenesis of liver diseases.Translational research : the journal of laboratory and clinical medicine · 2021
    Review
  7. Article
  8. Genomic Imprinting and the Regulation of Postnatal Neurogenesis.Brain plasticity (Amsterdam, Netherlands) · 2017
    Review
  9. Article
  10. Review
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. Article
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 at 2 institutions in 2 countries.

Catherine A LynchCancer and Ageing Research Group, School of Biomedical Sciences, University of Ulster, Coleraine BT52 1SA, United Kingdom. c.lynch@ulster.ac.uk
Benjamin Tycko
Timothy H Bestor
Colum P Walsh
Columbia University · USUniversity of Ulster · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe active copy of the imprinted gene H19 is turned off by inappropriate methylation in several pediatric tumors including Wilms' Tumour and embryonal rhabdomyosarcoma. H19 controls in cis the linked Insulin-like Growth Factor 2 (IGF2) gene, encoding an important growth factor. Recent work has suggested that methylation of a gene may lead to deacetylation of its associated histones and that silenced genes can be reactivated by increasing histone acetylation levels.

resultsTreatment of a rhabdomyosarcoma cell line which has a silent, methylated H19 gene with histone deacetylase (HDAC) inhibitors under conditions which gave maximal hyperacetylation of histone 4, both globally and at the H19 gene itself could not reactivate H19 or affect the active Insulin-like Growth Factor 2 (IGF2) gene, but caused clear up-regulation of the Tissue-type Plasminogen Activator (TPA) gene, a non-imprinted gene known to respond to changes in histone acetylation. In contrast, mild treatment of the cells with the methylation inhibitor 5-AzaC-2'-deoxycytidine (AzaC) on its own was able to reactivate H19. Combining AzaC treatment with HDAC inhibitors gave a reduced rather than enhanced reactivation. These findings were confirmed in mouse primary liver and kidney explants which maintain normal imprinting, where we also found that the silent Igf2 gene could not be reactivated by HDAC inhibitors.

conclusionThese results suggest that DNA methylation rather than histone acetylation is the primary determinant of silencing of H19 in rhabdomyosarcoma.

Indexed as

DNA MethylationAcetylationAnimalsAzacitidineBlotting, NorthernBlotting, WesternCell Line, TumorCells, CulturedFemaleGene ExpressionGene Expression Regulation, NeoplasticHistone Deacetylase InhibitorsHistone DeacetylasesHistonesHumansHydroxamic AcidsAzacitidineH19 long non-coding RNAHistone Deacetylase InhibitorsHistone DeacetylasesHistonesHydroxamic AcidsInsulin-Like Growth Factor IIRNARNA, Long NoncodingRNA, UntranslatedTissue Plasminogen Activatortrichostatin A

Identifiers

PMID12234381
PMCPMC119368
OpenAlexW2122455451

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.