Evidence map›Paper›PMID 20008439›Full record

ArticleCarcinogenesis2010

Mechanisms of epigenetic silencing of the Rassf1a gene during estrogen-induced breast carcinogenesis in ACI rats.

Athena Starlard-Davenport, Volodymyr P Tryndyak, Smitha R James, Adam R Karpf, John R Latendresse, Frederick A Beland, Igor P Pogribny

Open access · bronzeAbstract read
In one paragraph

Article in Carcinogenesis, 2010. 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
0.8field-weighted citation impact, top 28% 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, 27 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

7 authors at 3 institutions in 1 country.

Athena Starlard-DavenportDivision of Biochemical Toxicology, National Center for Toxicological Research, Jefferson, AR 72079, USA.
Volodymyr P Tryndyak
Smitha R James
Adam R Karpf
John R Latendresse
Frederick A Beland
Igor P Pogribny
United States Food and Drug Administration · USNational Center for Toxicological Research · USRoswell Park Comprehensive Cancer Center · US

Funding

Epigenetic regulation of cancer/germ-line antigen gene expressionR01CA116674 · NCI · UNIVERSITY OF NEBRASKA MEDICAL CENTER · PI KARPF, ADAM R. · 2006 to 2010
$1.4M
NCI NIH HHS R01 CA116674
6 · The paper itself

Abstract

Breast cancer, the most common malignancy in women, emerges through a multistep process, encompassing the progressive sequential evolution of morphologically distinct stages from a normal cell to hyperplasia (with and without atypia), carcinoma in situ, invasive carcinoma and metastasis. The success of treatment of breast cancer could be greatly improved by the detection at early stages of cancer. In the present study, we investigated the underlying molecular mechanisms involved in breast carcinogenesis in Augustus and Copenhagen-Irish female rats, a cross between the ACI strains, induced by continuous exposure to 17beta-estradiol. The results of our study demonstrate that early stages of estrogen-induced breast carcinogenesis are characterized by altered global DNA methylation, aberrant expression of proteins responsible for the proper maintenance of DNA methylation pattern and epigenetic silencing of the critical Rassf1a (Ras-association domain family 1, isoform A) tumor suppressor gene. Interestingly, transcriptional repression of the Rassf1a gene in mammary glands during early stages of breast carcinogenesis was associated with an increase in trimethylation of histones H3 lysine 9 and H3 lysine 27 and de novo CpG island methylation and at the Rassf1a promoter and first exon. In conclusion, we demonstrate that epigenetic alterations precede formation of preneoplastic lesions indicating the significance of epigenetic events in induction of oncogenic pathways in early stages of carcinogenesis.

Indexed as

Gene Expression Regulation, NeoplasticGene SilencingGenes, Tumor SuppressorAnimalsCell Transformation, NeoplasticCpG IslandsDNA MethylationEstradiolExonsFemaleHistone-Lysine N-MethyltransferaseHistone MethyltransferasesHistonesHyperplasiaMammary Glands, AnimalMammary Neoplasms, ExperimentalEstradiolHistone-Lysine N-MethyltransferaseHistone MethyltransferasesHistonesNeoplasm ProteinsTumor Suppressor Proteins

Identifiers

PMID20008439
PMCPMC2899845
OpenAlexW2131136248

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.