Evidence map›Paper›PMID 20809936›Full record

ArticleFibrogenesis & tissue repair2010

Mast cells and hypoxia drive tissue metaplasia and heterotopic ossification in idiopathic arthrofibrosis after total knee arthroplasty.

Theresa A Freeman, Javad Parvizi, Craig J Dela Valle, Marla J Steinbeck

Open access · hybridAbstract read
In one paragraph

Article in Fibrogenesis & tissue repair, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 41 papers.

0numbers the graph read from it
0cells of the map it votes in
41citing papers in PubMed
3.1field-weighted citation impact, top 9% 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

41 citing papers in PubMed, 97 citations in OpenAlex.

  1. Review
  2. Article
  3. Fibroblasts in heterotopic ossification: mechanisms and therapeutic targets.International journal of biological sciences · 2025
    Review
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  13. Increased elastic modulus of the synovial membrane in a rat ACLT model of osteoarthritis revealed by atomic force microscopy.Brazilian journal of medical and biological research = Revista brasileira de pesquisas medicas e biologica · 2020
    Article
  14. Chronic, Active Inflammation in Patients With Failed Total Knee Replacements Undergoing Revision Surgery.Journal of orthopaedic research : official publication of the Orthopaedic Research Society · 2019
    Article
  15. Review
  16. Article
  17. Carcinogenesis: the cancer cell-mast cell connection.Inflammation research : official journal of the European Histamine Research Society ... [et al.] · 2019
    Review
  18. Article
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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 3 institutions in 1 country.

Theresa A FreemanSchool of Biomedical Engineering and College of Drexel Medicine, Drexel University, 3120 Market Street, 323 Bossone, Philadelphia, PA 19104, USA. mjs348@drexel.edu.
Javad Parvizi
Craig J Dela Valle
Marla J Steinbeck
Thomas Jefferson University · USDrexel University · USRush University Medical Center · US

Funding

ROS activation of Apoptosis Signal-regulated Kinase1 (Ask1) in chondrocytesR03DE020840 · NIDCR · THOMAS JEFFERSON UNIVERSITY · PI FREEMAN, THERESA A · 2010 to 2011
$232k
NIDCR NIH HHS R03 DE020840
6 · The paper itself

Abstract

backgroundIdiopathic arthrofibrosis occurs in 3-4% of patients who undergo total knee arthroplasty (TKA). However, little is known about the cellular or molecular changes involved in the onset or progression of this condition. To classify the histomorphologic changes and evaluate potential contributing factors, periarticular tissues from the knees of patients with arthrofibrosis were analyzed for fibroblast and mast cell proliferation, heterotopic ossification, cellular apoptosis, hypoxia and oxidative stress.

resultsThe arthrofibrotic tissue was composed of dense fibroblastic regions, with limited vascularity along the outer edges. Within the fibrotic regions, elevated numbers of chymase/fibroblast growth factor (FGF)-expressing mast cells were observed. In addition, this region contained fibrocartilage and associated heterotopic ossification, which quantitatively correlated with decreased range of motion (stiffness). Fibrotic, fibrocartilage and ossified regions contained few terminal dUTP nick end labeling (TUNEL)-positive or apoptotic cells, despite positive immunostaining for lactate dehydrogenase (LDH)5, a marker of hypoxia, and nitrotyrosine, a marker for protein nitrosylation. LDH5 and nitrotyrosine were found in the same tissue areas, indicating that hypoxic areas within the tissue were associated with increased production of reactive oxygen and nitrogen species.

conclusionsTaken together, we suggest that hypoxia-associated oxidative stress initiates mast cell proliferation and FGF secretion, spurring fibroblast proliferation and tissue fibrosis. Fibroblasts within this hypoxic environment undergo metaplastic transformation to fibrocartilage, followed by heterotopic ossification, resulting in increased joint stiffness. Thus, hypoxia and associated oxidative stress are potential therapeutic targets for fibrosis and metaplastic progression of idiopathic arthrofibrosis after TKA.

Identifiers

PMID20809936
PMCPMC2940819
OpenAlexW2131811909

What OpenQuestion holds

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Registered trials

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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.