Evidence map›Paper›PMID 21186298›Full record

ArticleCarcinogenesis2011

Aberrant DNA hypermethylation patterns lead to transcriptional silencing of tumor suppressor genes in UVB-exposed skin and UVB-induced skin tumors of mice.

Vijayalakshmi Nandakumar, Mudit Vaid, Trygve O Tollefsbol, Santosh K Katiyar

RetractedOpen access · bronzeAbstract readRetracted Publication
In one paragraph

Article in Carcinogenesis, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It has been retracted, and should not be counted. Cited by 36 papers.

0numbers the graph read from it
0cells of the map it votes in
36citing papers in PubMed
2.6field-weighted citation impact, top 10% 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

36 citing papers in PubMed, 82 citations in OpenAlex.

  1. Review
  2. Article
  3. Review
  4. Review
  5. Article
  6. Article
  7. Prognostic Relevance of SFRP1 Gene Promoter Methylation in Colorectal CarcinomaAsian Pacific journal of cancer prevention : APJCP · 2019
    Article
  8. Article
  9. Tea polyphenols for the prevention of UVB-induced skin cancer.Photodermatology, photoimmunology & photomedicine · 2018
    Review
  10. Article
  11. The Role of p16International journal of molecular sciences · 2017
    Review
  12. Review
  13. Article
  14. Article
  15. DNMT3a methylation in neuropathic pain.Journal of pain research · 2017
    Article
  16. Article
  17. Article
  18. Review
  19. Article
  20. Review
4 · The record

Corrections and comments

  • Retraction · 2018-04-20Duplication of/in Image · Falsification/Fabrication of Image · Investigation by Company/Institution · Manipulation of Images · Original Data and/or Images not Provided and/or not Available · · Santosh Katiyar has institutional finding of misconduct
  • Retracted
5 · Who and what money

Authors and funding

4 authors at 2 institutions in 1 country.

Vijayalakshmi NandakumarDepartment of Dermatology, University of Alabama at Birmingham, Birmingham Veterans Affairs Medical Center, Birmingham, AL 35294, USA.
Mudit Vaid
Trygve O Tollefsbol
Santosh K Katiyar
Birmingham VA Medical Center · USUniversity of Alabama at Birmingham · US

Funding

Epigenetic modulation by green tea in prevention of photocarcinogenesisR21CA140832 · NCI · UNIVERSITY OF ALABAMA AT BIRMINGHAM · PI KATIYAR, SANTOSH KUMAR · 2010 to 2011
$346k
NCI NIH HHS CA140832NCI NIH HHS R21 CA140832
6 · The paper itself

Abstract

Overexposure of the human skin to solar ultraviolet (UV) radiation is the major etiologic factor for development of skin cancers. Here, we report the results of epigenetic modifications in UV-exposed skin and skin tumors in a systematic manner. The skin and tumor samples were collected after chronic exposure of the skin of SKH-1 hairless mice to UVB radiation using a well-established photocarcinogenesis protocol. We found a distinct DNA hypermethylation pattern in the UVB-exposed epidermal skin and UVB-induced skin tumors that was associated with the elevated expression and activity of the DNA methyltransferases (Dnmt) 1, Dnmt3a and Dnmt3b. To explore the role of hypermethylation in skin photocarcinogenesis, we focused on the p16(INK4a) and RASSF1A tumor suppressor genes, which are transcriptionally silenced on methylation. We established that the silencing of these genes in UVB-exposed epidermis and UVB-induced skin tumors is associated with a network of epigenetic modifications, including hypoacetylation of histone H3 and H4 and increased histone deacetylation, as well as recruitment of methyl-binding proteins, including MeCP2 and MBD1, to the methylated CpGs. Higher levels of DNA methylation and DNMT activity in human squamous cell carcinoma specimens than in normal human skin suggest that the data are relevant clinically. Our data indicate for the first time that UVB-induced DNA hypermethylation, enhanced Dnmt activity and histone modifications occur in UVB-exposed skin and UVB-induced skin tumors and suggest that these events are involved in the silencing of tumor suppressor genes and in skin tumor development.

Indexed as

DNA MethylationGene SilencingGenes, SuppressorUltraviolet RaysAnimalsChromatin Assembly and DisassemblyDNA (Cytosine-5-)-Methyltransferase 1DNA (Cytosine-5-)-MethyltransferasesEpigenesis, GeneticFemaleGenes, p16MiceMice, HairlessNeoplasms, Radiation-InducedSkin NeoplasmsTumor Suppressor ProteinsDNA (Cytosine-5-)-Methyltransferase 1DNA (Cytosine-5-)-MethyltransferasesRASSF1 protein, mouseTumor Suppressor Proteins

Identifiers

PMID21186298
PMCPMC3066413
OpenAlexW2162287523

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.