Evidence map›Paper›PMID 19840931›Full record

ArticleThe Journal of biological chemistry2009

Mitochondrial DNA damage initiates a cell cycle arrest by a Chk2-associated mechanism in mammalian cells.

Christopher A Koczor, Inna N Shokolenko, Amy K Boyd, Shawn P Balk, Glenn L Wilson, Susan P LeDoux

Open access · hybridAbstract read
In one paragraph

Article in The Journal of biological chemistry, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed
1.5field-weighted citation impact, top 19% 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

24 citing papers in PubMed, 57 citations in OpenAlex.

  1. Trial
  2. Article
  3. Exploring the oncogenic impact of heteroplasmicMitochondrial communications · 2025
    Article
  4. Article
  5. Mitochondrial PARP1 regulates NADExperimental & molecular medicine · 2022
    Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Review
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. CHK2 kinase in the DNA damage response and beyond.Journal of molecular cell biology · 2014
    Review
  19. Mitochondria in lung biology and pathology: more than just a powerhouse.American journal of physiology. Lung cellular and molecular physiology · 2014
    Review
  20. Mitochondria as a target of environmental toxicants.Toxicological sciences : an official journal of the Society of Toxicology · 2013
    Review
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

6 authors at 1 institution in 1 country.

Christopher A KoczorDepartment of Cell Biology and Neuroscience, University of South Alabama, Mobile, Alabama 36688.
Inna N ShokolenkoDepartment of Cell Biology and Neuroscience, University of South Alabama, Mobile, Alabama 36688.
Amy K BoydDepartment of Cell Biology and Neuroscience, University of South Alabama, Mobile, Alabama 36688.
Shawn P BalkDepartment of Cell Biology and Neuroscience, University of South Alabama, Mobile, Alabama 36688.
Glenn L WilsonDepartment of Cell Biology and Neuroscience, University of South Alabama, Mobile, Alabama 36688.
Susan P LeDouxDepartment of Cell Biology and Neuroscience, University of South Alabama, Mobile, Alabama 36688. Electronic address: sledoux@usouthal.edu.
University of South Alabama · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Previous work from our laboratory has focused on mitochondrial DNA (mtDNA) repair and cellular viability. However, other events occur prior to the initiation of apoptosis in cells. Because of the importance of mtDNA in ATP production and of ATP in fuel cell cycle progression, we asked whether mtDNA damage was an upstream signal leading to cell cycle arrest. Using quantitative alkaline Southern blot technology, we found that exposure to menadione produced detectable mtDNA damage in HeLa cells that correlated with an S phase cell cycle arrest. To determine whether mtDNA damage was causatively linked to the observed cell cycle arrest, experiments were performed utilizing a MTS-hOGG1-Tat fusion protein to target the hOGG1 repair enzyme to mitochondria and enhance mtDNA repair. The results revealed that the transduction of MTS-hOGG1-Tat into HeLa cells alleviated the cell cycle block following an oxidative insult. Furthermore, mechanistic studies showed that Chk2 phosphorylation was enhanced following menadione exposure. Treatment of the HeLa cells with the hOGG1 fusion protein prior to menadione exposure resulted in an increase in the rate of Chk2 dephosphorylation. These results strongly support a direct link between mtDNA damage and cell cycle arrest.

Indexed as

Adenosine TriphosphateAnimalsCheckpoint Kinase 2DNA DamageDNA GlycosylasesDNA, MitochondrialDNA RepairHeLa CellsHumansMitochondriaOxidative StressPhosphorylationProtein Serine-Threonine KinasesRatsRecombinant Fusion ProteinsSignal TransductionAdenosine TriphosphateCheckpoint Kinase 2CHEK2 protein, humanChek2 protein, ratDNA GlycosylasesDNA, Mitochondrialoxoguanine glycosylase 1, humanProtein Serine-Threonine KinasesRecombinant Fusion ProteinsVitamin K 3Vitamins

Identifiers

PMID19840931
PMCPMC2794735
OpenAlexW1979018407

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.