Evidence map›Paper›PMID 22815636›Full record

ArticleMolecular vision2012

Quiescent keratocytes fail to repair MMC induced DNA damage leading to the long-term inhibition of myofibroblast differentiation and wound healing.

James V Jester, Chyong Jy Nien, Vasilis Vasiliou, Donald J Brown

Open access · greenAbstract read
In one paragraph

Article in Molecular vision, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed
2.2field-weighted citation impact, top 12% 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

22 citing papers in PubMed, 30 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

4 authors at 1 institution in 1 country.

James V JesterGavin Herbert Eye Institute, University of California-Irvine, CA, USA. jjester@uci.edu
Chyong Jy Nien
Vasilis Vasiliou
Donald J Brown
The California Eye Institute · US

Funding

ROLE OF TGFBETA IN CORNEAL STROMAL WOUND HEALINGR01EY007348 · NEI · UNIVERSITY OF TEXAS SW MED CTR/DALLAS · PI JESTER, JAMES V · 1987 to 2010
$4.5M
Novel Role of Corneal Crystallins as Modulators of Cell Growth and TransparencyR01EY017963 · NEI · YALE UNIVERSITY · PI VASILIOU, VASILIS · 2007 to 2019
$3.7M
Structure and Biomechanics of the Human Optic Nerve HeadR01EY019719 · NEI · UNIVERSITY OF CALIFORNIA-IRVINE · PI BROWN, DONALD J · 2010 to 2013
$1.5M
VISION RESEARCH INFRASTRUCTURE DEVELOPMENT GRANTR24EY016663 · NEI · UNIVERSITY OF CALIFORNIA-IRVINE · PI NESBURN, ANTHONY BART · 2005 to 2009
$1.1M
NEI NIH HHS EY016663NEI NIH HHS EY017963NEI NIH HHS EY07348NEI NIH HHS R01 EY007348NEI NIH HHS R01 EY017963NEI NIH HHS R01 EY019719NEI NIH HHS R24 EY016663
6 · The paper itself

Abstract

purposeThe purpose of this study was to determine the acute and long-term effects of mitomycin C (MMC) on quiescent rabbit corneal keratocytes regarding cell proliferation, myofibroblast differentiation and DNA repair.

methodsQuiescent keratocytes cultured in serum-free media were exposed to various concentrations of MMC and then treated with transforming growth factor-β (TGFβ). DNA damage was evaluated in both cultured keratocytes and live rabbit eyes following treatment with MMC. The long-term ability of quiescent keratocytes to repair MMC induced damage in vivo was evaluated in rabbits treated with MMC 2 months before 100 μm deep lamellar keratectomy (LK) injury.

resultsMMC significantly blocked TGFβ-induced cell proliferation and myofibroblast differentiation in cultured quiescent keratocytes and altered the transcriptional regulation of macrophage chemotactic protein-1 (MCP-1) and alpha smooth muscle actin (αSMA). MMC also induced phosphorylation of the nuclear histone marker of DNA damage, γH2AX (a member of the H2A histone family), without induction of cell cycle entry or immediate DNA repair measured by Comet assay. In live rabbits, 0.2 mg/ml MMC significantly induced γH2AX nuclear immunostaining (p<0.05) throughout the cornea and corneas receiving 0.2 mg/ml MMC treatment 2 months before LK injury showed complete absence of any corneal scarring.

conclusionsMMC induces DNA damage to quiescent corneal keratocytes, which remains unrepaired, resulting in abnormal cell replication and gene transcription that leads to long-term effects on corneal repair. Overall these findings suggest that there may be long-term and perhaps permanent consequences to the application of MMC as an anti-fibrotic therapy.

Indexed as

DNA DamageActinsAnimalsCell DifferentiationCell ProliferationCells, CulturedChemokine CCL2CicatrixComet AssayCorneaCorneal InjuriesCorneal KeratocytesCulture Media, Serum-FreeDNA RepairHistonesMitomycinActinsChemokine CCL2Culture Media, Serum-FreeHistonesMitomycinTransforming Growth Factor beta

Identifiers

PMID22815636
PMCPMC3398499
OpenAlexW2159081023

What OpenQuestion holds

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LicenceCC BY
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.