Evidence map›Paper›PMID 18289383›Full record

ArticleArthritis research & therapy2008

Human articular chondrocytes produce IL-7 and respond to IL-7 with increased production of matrix metalloproteinase-13.

David Long, Simon Blake, Xiao-Yu Song, Michael Lark, Richard F Loeser

Open access · goldAbstract read
In one paragraph

Article in Arthritis research & therapy, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 54 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
54citing papers in PubMed, 1 pooled it
4.1field-weighted citation impact, top 7% 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

54 citing papers in PubMed, 1 synthesis or guideline pooled it, 94 citations in OpenAlex.

  1. Pooled it
  2. Trial
  3. Exercise-myokine relationships in osteoarthritis.Journal of translational medicine · 2026
    Review
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  8. Bone-muscle crosstalk under physiological and pathological conditions.Cellular and molecular life sciences : CMLS · 2024
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  9. Distinct patterns of cytokines, chemokines, and growth factors in synovial fluid after ACL injury in comparison to osteoarthritis.Journal of orthopaedic research : official publication of the Orthopaedic Research Society · 2024
    Article
  10. Article
  11. Article
  12. Review
  13. Article
  14. Exerkines and osteoarthritis.Frontiers in physiology · 2023
    Review
  15. Article
  16. Review
  17. Article
  18. Article
  19. Article
  20. Interleukin (IL)-7 Signaling in the Tumor Microenvironment.Advances in experimental medicine and biology · 2021
    Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

5 authors at 1 institution in 1 country.

David LongSection of Molecular Medicine, Department of Internal Medicine, Wake Forest University School of Medicine, Medical Center Blvd, Winston-Salem, North Carolina 27157, USA. dllong@wfubmc.edu
Simon Blake
Xiao-Yu Song
Michael Lark
Richard F Loeser
Wake Forest University · US

Funding

Integrin Function in CartilageR37AR049003 · NIAMS · WAKE FOREST UNIVERSITY HEALTH SCIENCES · PI LOESER, RICHARD F · 2012 to 2021
$4.1M
Integrin Function in CartilageR01AR049003 · NIAMS · WAKE FOREST UNIVERSITY HEALTH SCIENCES · PI LOESER, RICHARD F · 2002 to 2011
$2.8M
Aging and IGF-I in CartilageR01AG016697 · NIA · WAKE FOREST UNIVERSITY HEALTH SCIENCES · PI LOESER, RICHARD F · 2001 to 2009
$2.4M
NIAMS NIH HHS AR49003NIAMS NIH HHS R01 AR049003NIAMS NIH HHS R37 AR049003NIA NIH HHS AG16697NIA NIH HHS R01 AG016697
6 · The paper itself

Abstract

introductionFibronectin fragments have been found in the articular cartilage and synovial fluid of patients with osteoarthritis and rheumatoid arthritis. These matrix fragments can stimulate production of multiple mediators of matrix destruction, including various cytokines and metalloproteinases. The purpose of this study was to discover novel mediators of cartilage destruction using fibronectin fragments as a stimulus.

methodsHuman articular cartilage was obtained from tissue donors and from osteoarthritic cartilage removed at the time of knee replacement surgery. Enzymatically isolated chondrocytes in serum-free cultures were stimulated overnight with the 110 kDa alpha5beta1 integrin-binding fibronectin fragment or with IL-1, IL-6, or IL-7. Cytokines and matrix metalloproteinases released into the media were detected using antibody arrays and quantified by ELISA. IL-7 receptor expression was evaluated by flow cytometry, immunocytochemical staining, and PCR.

resultsIL-7 was found to be produced by chondrocytes treated with fibronectin fragments. Compared with cells isolated from normal young adult human articular cartilage, increased IL-7 production was noted in cells isolated from older adult tissue donors and from osteoarthritic cartilage. Chondrocyte IL-7 production was also stimulated by combined treatment with the catabolic cytokines IL-1 and IL-6. Chondrocytes were found to express IL-7 receptors and to respond to IL-7 stimulation with increased production of matrix metalloproteinase-13 and with proteoglycan release from cartilage explants.

conclusionThese novel findings indicate that IL-7 may contribute to cartilage destruction in joint diseases, including osteoarthritis.

Indexed as

Cartilage, ArticularCells, CulturedChondrocytesDrug SynergismFibronectinsHumansIntegrin alpha5beta1Interleukin-1Interleukin-6Interleukin-7InterleukinsIn Vitro TechniquesKnee JointMatrix Metalloproteinase 13Peptide FragmentsUp-RegulationFibronectinsIntegrin alpha5beta1Interleukin-1Interleukin-6Interleukin-7InterleukinsMatrix Metalloproteinase 13Peptide Fragments

Identifiers

PMID18289383
PMCPMC2374453
OpenAlexW1998389349

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.