Evidence map›Paper›PMID 22009531›Full record

ArticleCancer research2011

Manganese superoxide dismutase is a p53-regulated gene that switches cancers between early and advanced stages.

Sanjit K Dhar, Jitbanjong Tangpong, Luksana Chaiswing, Terry D Oberley, Daret K St Clair

Open access · bronzeAbstract read
In one paragraph

Article in Cancer research, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 70 papers.

0numbers the graph read from it
0cells of the map it votes in
70citing papers in PubMed
4.5field-weighted citation impact, top 4% 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

70 citing papers in PubMed, 108 citations in OpenAlex.

  1. Review
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  3. Review
  4. Article
  5. eLife · 2024
    Article
  6. Antioxidant Enzymes and Their Potential Use in Breast Cancer Treatment.International journal of molecular sciences · 2024
    Review
  7. Review
  8. bioRxiv : the preprint server for biology · 2024
    Article
  9. Article
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  11. Review
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  13. Article
  14. Article
  15. Article
  16. Article
  17. Molecules (Basel, Switzerland) · 2022
    Review
  18. Article
  19. Review
  20. Article

10 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

5 authors at 1 institution in 1 country.

Sanjit K DharGraduate Center for Toxicology, University of Kentucky, Lexington, Kentucky, USA.
Jitbanjong Tangpong
Luksana Chaiswing
Terry D Oberley
Daret K St Clair
University of Kentucky · US

Funding

REDOX REGULATION OF TUMOR SUPPRESSION BY MNSODR01CA073599 · NCI · UNIVERSITY OF KENTUCKY · PI ST CLAIR, DARET K · 1998 to 2012
$4.0M
Mechansins of MnSOD expression in normal and tumor cellsR01CA049797 · NCI · UNIVERSITY OF KENTUCKY · PI ST CLAIR, DARET K · 1996 to 2014
$3.3M
MECHANISM OF MNSOD EXPRESSION IN NORMAL &TUMOR CELLSR29CA049797 · NCI · WAKE FOREST UNIVERSITY · PI ST CLAIR, DARET K · 1990 to 1994
–
NCI NIH HHS CA 49797NCI NIH HHS CA 73599NCI NIH HHS R01 CA049797NCI NIH HHS R01 CA073599
6 · The paper itself

Abstract

Manganese superoxide dismutase (MnSOD) plays a critical role in the survival of aerobic life, and its aberrant expression has been implicated in carcinogenesis and tumor resistance to therapy. However, despite extensive studies in MnSOD regulation and its role in cancer, when and how the alteration of MnSOD expression occurs during the process of tumor development in vivo are unknown. Here, we generated transgenic mice expressing a luciferase reporter gene under the control of human MnSOD promoter-enhancer elements and investigated the changes of MnSOD transcription using the 7,12-dimethylbenz(α)anthracene (DMBA)/12-O-tetradecanoylphorbol-l3-acetate (TPA) multistage skin carcinogenesis model. The results show that MnSOD expression was suppressed at a very early stage but increased at late stages of skin carcinogenesis. The suppression and subsequent restoration of MnSOD expression were mediated by two transcription-factors, Sp1 and p53. Exposure to DMBA and TPA activated p53 and decreased MnSOD expression via p53-mediated suppression of Sp1 binding to the MnSOD promoter in normal-appearing skin and benign papillomas. In squamous cell carcinomas, Sp1 binding increased because of the loss of functional p53. We used chromatin immunoprecipitation, electrophoretic mobility shift assay, and both knockdown and overexpression of Sp1 and p53 to verify their roles in the expression of MnSOD at each stage of cancer development. The results identify MnSOD as a p53-regulated gene that switches between early and advanced stages of cancer. These findings also provide strong support for the development of means to reactivate p53 for the prevention of tumor progression.

Indexed as

9,10-Dimethyl-1,2-benzanthraceneAnimalsCarcinogensCarcinoma, Squamous CellCocarcinogenesisDisease ProgressionEnhancer Elements, GeneticFemaleGene Expression Regulation, NeoplasticGene Knockdown TechniquesGenes, ReporterGenes, SyntheticHumansMiceMice, TransgenicNeoplasm Proteins9,10-Dimethyl-1,2-benzanthraceneCarcinogensNeoplasm ProteinsRecombinant Fusion ProteinsSp1 Transcription FactorSuperoxide DismutaseTetradecanoylphorbol AcetateTumor Suppressor Protein p53

Identifiers

PMID22009531
PMCPMC3206134
OpenAlexW2161465168

What OpenQuestion holds

Textmetadata
LicenceTDM
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.