Evidence map›Paper›PMID 23889295›Full record

ArticleScandinavian journal of medicine & science in sports2013

Increased mast cell numbers in a calcaneal tendon overuse model.

J Pingel, J Wienecke, M Kongsgaard, H Behzad, T Abraham, H Langberg, A Scott

Open access · hybridAbstract read
In one paragraph

Article in Scandinavian journal of medicine & science in sports, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 32 papers.

0numbers the graph read from it
0cells of the map it votes in
32citing papers in PubMed
2.0field-weighted citation impact, top 16% 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

32 citing papers in PubMed, 54 citations in OpenAlex.

  1. Tendinopathy: The Interplay between Mechanical Stress, Inflammation, and Vascularity.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2025
    Review
  2. Article
  3. Article
  4. Review
  5. LeveragingFrontiers in bioengineering and biotechnology · 2024
    Review
  6. Review
  7. Article
  8. Article
  9. Article
  10. Review
  11. Review
  12. Tendon healing is adversely affected by low-grade inflammation.Journal of orthopaedic surgery and research · 2021
    Review
  13. Review
  14. Local shifts in inflammatory and resolving lipid mediators in response to tendon overuse.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2021
    Article
  15. Bringing tendon biology to heel: Leveraging mechanisms of tendon development, healing, and regeneration to advance therapeutic strategies.Developmental dynamics : an official publication of the American Association of Anatomists · 2021
    Review
  16. Review
  17. Using tools in mechanobiology to repair tendons.Current tissue microenvironment reports · 2020
    Article
  18. Review
  19. Review
  20. Recent advances in tendinopathy.Faculty reviews · 2020
    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

7 authors at 6 institutions in 2 countries.

J PingelInstitute of Sports Medicine, Department of Orthopaedic Surgery M. Bispebjerg Hospital and Center for Healthy Aging, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark.
J Wienecke
M Kongsgaard
H Behzad
T Abraham
H Langberg
A Scott
University of Copenhagen · DKDanish National Institute of Public Health · DKSt. Paul's Hospital · CAUniversity College Copenhagen · DKUniversity of British Columbia · CAVancouver Coastal Health Research Institute · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Tendinopathy is often discovered late because the initial development of tendon pathology is asymptomatic. The aim of this study was to examine the potential role of mast cell involvement in early tendinopathy using a high-intensity uphill running (HIUR) exercise model. Twenty-four male Wistar rats were divided in two groups: running group (n = 12); sedentary control group (n = 12). The running-group was exposed to the HIUR exercise protocol for 7 weeks. The calcaneal tendons of both hind limbs were dissected. The right tendon was used for histologic analysis using Bonar score, immunohistochemistry, and second harmonic generation microscopy (SHGM). The left tendon was used for quantitative polymerase chain reaction (qPCR) analysis. An increased tendon cell density in the runners were observed compared to the controls (P = 0.05). Further, the intensity of immunostaining of protein kinase B, P = 0.03; 2.75 ± 0.54 vs 1.17 ± 0.53, was increased in the runners. The Bonar score (P = 0.05), and the number of mast cells (P = 0.02) were significantly higher in the runners compared to the controls. Furthermore, SHGM showed focal collagen disorganization in the runners, and reduced collagen density (P = 0.03). IL-3 mRNA levels were correlated with mast cell number in sedentary animals. The qPCR analysis showed no significant differences between the groups in the other analyzed targets. The current study demonstrates that 7-week HIUR causes structural changes in the calcaneal tendon, and further that these changes are associated with an increased mast cell density.

Indexed as

Physical Conditioning, AnimalAchilles TendonAnimalsCell CountCell ProliferationCollagenCumulative Trauma DisordersDisease Models, AnimalImmunohistochemistryInterleukin-3MaleMast CellsMicroscopy, Fluorescence, MultiphotonProto-Oncogene Proteins c-aktRatsRats, WistarCollagenInterleukin-3Proto-Oncogene Proteins c-aktRNA, Messengercollagenexerciserattendinosis

Identifiers

PMID23889295
PMCPMC4282450
OpenAlexW1541030348

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.