Evidence map›Paper›PMID 21385358›Full record

ArticleArthritis research & therapy2011

The tumour-associated glycoprotein podoplanin is expressed in fibroblast-like synoviocytes of the hyperplastic synovial lining layer in rheumatoid arthritis.

Anna-Karin H Ekwall, Thomas Eisler, Christian Anderberg, Chunsheng Jin, Niclas Karlsson, Mikael Brisslert, Maria I Bokarewa

Open access · goldAbstract read
In one paragraph

Article in Arthritis research & therapy, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 59 papers.

0numbers the graph read from it
0cells of the map it votes in
59citing papers in PubMed
2.8field-weighted citation impact, top 8% 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

59 citing papers in PubMed, 111 citations in OpenAlex.

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  6. Resolution of inflammation during rheumatoid arthritis.Frontiers in cell and developmental biology · 2025
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  11. High-ResolutionAnalytical chemistry · 2023
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  16. Neoplastic synovial lining cells that coexpress podoplanin and CD90 overproduce CSF-1, driving tenosynovial giant cell tumor.Journal of orthopaedic research : official publication of the Orthopaedic Research Society · 2022
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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

7 authors at 2 institutions in 1 country.

Anna-Karin H EkwallDepartment of Rheumatology and Inflammation Research, Institute of Medicine, Sahlgrenska Academy, Göteborg University, Box 480, 405 30 Göteborg, Sweden. anna-karin.hultgard.ekwall@rheuma.gu.se
Thomas Eisler
Christian Anderberg
Chunsheng Jin
Niclas Karlsson
Mikael Brisslert
Maria I Bokarewa
University of Gothenburg · SESpenshult Hospital · SE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

introductionActivated fibroblast-like synoviocytes (FLSs) in rheumatoid arthritis (RA) share many characteristics with tumour cells and are key mediators of synovial tissue transformation and joint destruction. The glycoprotein podoplanin is upregulated in the invasive front of several human cancers and has been associated with epithelial-mesenchymal transition, increased cell migration and tissue invasion. The aim of this study was to investigate whether podoplanin is expressed in areas of synovial transformation in RA and especially in promigratory RA-FLS.

methodsPodoplanin expression in human synovial tissue from 18 RA patients and nine osteoarthritis (OA) patients was assessed by immunohistochemistry and confirmed by Western blot analysis. The expression was related to markers of synoviocytes and myofibroblasts detected by using confocal immunofluoresence microscopy. Expression of podoplanin, with or without the addition of proinflammatory cytokines and growth factors, in primary human FLS was evaluated by using flow cytometry.

resultsPodoplanin was highly expressed in cadherin-11-positive cells throughout the synovial lining layer in RA. The expression was most pronounced in areas with lining layer hyperplasia and high matrix metalloproteinase 9 expression, where it coincided with upregulation of α-smooth muscle actin (α-sma). The synovium in OA was predominantly podoplanin-negative. Podoplanin was expressed in 50% of cultured primary FLSs, and the expression was increased by interleukin 1β, tumour necrosis factor α and transforming growth factor β receptor 1.

conclusionsHere we show that podoplanin is highly expressed in FLSs of the invading synovial tissue in RA. The concomitant upregulation of α-sma and podoplanin in a subpopulation of FLSs indicates a myofibroblast phenotype. Proinflammatory mediators increased the podoplanin expression in cultured RA-FLS. We conclude that podoplanin might be involved in the synovial tissue transformation and increased migratory potential of activated FLSs in RA.

Indexed as

AgedArthritis, RheumatoidBlotting, WesternCell SeparationFemaleFibroblastsFlow CytometryFluorescent Antibody TechniqueHumansHyperplasiaImmunohistochemistryMaleMembrane GlycoproteinsMicroscopy, ConfocalMiddle AgedPodoplaninMembrane GlycoproteinsPDPN protein, humanPodoplanin

Identifiers

PMID21385358
PMCPMC3132020
OpenAlexW2124749608

What OpenQuestion holds

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LicenceCC BY
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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.