Evidence map›Paper›PMID 17314394›Full record

ArticleMolecular biology of the cell2007

Epigenetic reprogramming of OCT4 and NANOG regulatory regions by embryonal carcinoma cell extract.

Christel T Freberg, John Arne Dahl, Sanna Timoskainen, Philippe Collas

Open access · greenAbstract read
In one paragraph

Article in Molecular biology of the cell, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 83 papers.

0numbers the graph read from it
0cells of the map it votes in
83citing papers in PubMed
9.9field-weighted citation impact, top 1% 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

83 citing papers in PubMed, 197 citations in OpenAlex.

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  17. Cellular Reprogramming Using Protein and Cell-Penetrating Peptides.International journal of molecular sciences · 2017
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23 more citing papers are in PubMed but not listed here.

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 1 institution in 1 country.

Christel T FrebergDepartment of Biochemistry, Faculty of Medicine, Institute of Basic Medical Sciences, University of Oslo, 0317 Oslo, Norway.
John Arne Dahl
Sanna Timoskainen
Philippe Collas
University of Oslo · NO

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Analyses of molecular events associated with reprogramming somatic nuclei to pluripotency are scarce. We previously reported the reprogramming of epithelial cells by extract of undifferentiated embryonal carcinoma (EC) cells. We now demonstrate reprogramming of DNA methylation and histone modifications on regulatory regions of the developmentally regulated OCT4 and NANOG genes by exposure of 293T cells to EC cell extract. OCT4 and NANOG are transcriptionally up-regulated and undergo mosaic cytosine-phosphate-guanosine demethylation. OCT4 demethylation occurs as early as week 1, is enhanced by week 2, and is most prominent in the proximal promoter and distal enhancer. Targeted OCT4 and NANOG demethylation does not occur in 293T extract-treated cells. Retinoic acid-mediated differentiation of reprogrammed cells elicits OCT4 promoter remethylation and transcriptional repression. Chromatin immunoprecipitation analyses of lysines K4, K9, and K27 of histone H3 on OCT4 and NANOG indicate that primary chromatin remodeling determinants are acetylation of H3K9 and demethylation of dimethylated H3K9. H3K4 remains di- and trimethylated. Demethylation of trimethylated H3K9 and H3K27 also occurs; however, trimethylation seems more stable than dimethylation. We conclude that a central epigenetic reprogramming event is relaxation of chromatin at loci associated with pluripotency to create a conformation compatible with transcriptional activation.

Indexed as

AcetylationCarcinoma, EmbryonalCell LineChromatin Assembly and DisassemblyDNA-Binding ProteinsDNA MethylationEpigenesis, GeneticHistonesHomeodomain ProteinsHumansIn Vitro TechniquesLysineMethylationNanog Homeobox ProteinOctamer Transcription Factor-3Promoter Regions, GeneticDNA-Binding ProteinsHistonesHomeodomain ProteinsLysineNanog Homeobox ProteinNANOG protein, humanOctamer Transcription Factor-3Tretinoin

Identifiers

PMID17314394
PMCPMC1855029
OpenAlexW2099689431

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.