Evidence map›Paper›PMID 26123554›Full record

ArticleArthritis research & therapy2015

Cartilage in facet joints of patients with ankylosing spondylitis (AS) shows signs of cartilage degeneration rather than chondrocyte hypertrophy: implications for joint remodeling in AS.

Janine Bleil, Joachim Sieper, Rene Maier, Uwe Schlichting, Axel Hempfing, Uta Syrbe, Heiner Appel

Open access · goldAbstract read
In one paragraph

Article in Arthritis research & therapy, 2015. 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
1.6field-weighted citation impact, top 18% 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, 39 citations in OpenAlex.

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  20. Bone Wasn't Built in a Day: Destruction and Formation of Bone in the Rheumatic Diseases.Transactions of the American Clinical and Climatological Association · 2017
    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 4 institutions in 2 countries.

Janine BleilCharité Universitätsmedizin Berlin, Campus Benjamin Franklin, Medizinische Klinik für Gastroenterologie, Infektiologie und Rheumatologie, Hindenburgdamm 30, 12203, Berlin, Germany. janine.bleil@charite.de.
Joachim SieperCharité Universitätsmedizin Berlin, Campus Benjamin Franklin, Medizinische Klinik für Gastroenterologie, Infektiologie und Rheumatologie, Hindenburgdamm 30, 12203, Berlin, Germany. joachim.sieper@charite.de.
Rene MaierDeutsches Rheuma-Forschungszentrum, Charitéplatz 1, 10117, Berlin, Germany. rene-philipp.maier@charite.de.
Uwe SchlichtingCharité Universitätsmedizin Berlin, Institut für Pathologie, Charitéplatz 1, 10117, Berlin, Germany. uwe.schlichting@charite.de.
Axel HempfingWerner-Wicker-Klinik, Im Kreuzfeld 4, 34537, Bad Wildungen, Germany. hempfing@werner-wicker-klinik.de.
Uta SyrbeCharité Universitätsmedizin Berlin, Campus Benjamin Franklin, Medizinische Klinik für Gastroenterologie, Infektiologie und Rheumatologie, Hindenburgdamm 30, 12203, Berlin, Germany. uta.syrbe@charite.de.
Heiner AppelCharité Universitätsmedizin Berlin, Campus Benjamin Franklin, Medizinische Klinik für Gastroenterologie, Infektiologie und Rheumatologie, Hindenburgdamm 30, 12203, Berlin, Germany. heiner.appel@charite.de.
Franklin University · USCharité - Universitätsmedizin Berlin · DEGerman Rheumatism Research Centre · DEWerner-Wicker-Klinik · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

introductionIn ankylosing spondylitis (AS), joint remodeling leading to joint ankylosis involves cartilage fusion. Here, we analyzed whether chondrocyte hypertrophy is involved in cartilage fusion and subsequent joint remodeling in AS.

methodsWe assessed the expression of chondrocyte hypertrophy markers runt-related transcription factor 2 (Runx2), type X collagen (COL10), matrix metalloproteinase 13 (MMP13), osteocalcin and beta-catenin and the expression of positive bone morphogenic proteins (BMPs) and negative regulators (dickkopf-1 (DKK-1)), sclerostin, (wingless inhibitory factor 1 (wif-1)) of chondrocyte hypertrophy in the cartilage of facet joints from patients with AS or osteoarthritis (OA) and from autopsy controls (CO) by immunohistochemistry. Sex determining region Y (SRY)-box 9 (Sox9) and type II collagen (COL2) expression was assessed as indicators of chondrocyte integrity and function.

resultsThe percentage of hypertrophic chondrocytes expressing Runx2, COL10, MMP13, osteocalcin or beta-catenin was significantly increased in OA but not in AS joints compared to CO joints. Frequencies of sclerostin-positive and DKK-1-positive chondrocytes were similar in AS and CO. In contrast, wif-1- but also BMP-2- and BMP-7-expressing and Sox9-expressing chondrocytes were drastically reduced in AS joints compared to CO as well as OA joints whereas the percentage of COL2-expressing chondrocytes was significantly higher in AS joints compared to CO joints.

conclusionsWe found no evidence for chondrocyte hypertrophy within hyaline cartilage of AS joints even in the presence of reduced expression of the wnt inhibitor wif-1 suggesting that chondrocyte hypertrophy is not a predominant pathway involved in joint fusion and remodeling in AS. In contrast, the reduced expression of Sox9, BMP-2 and BMP-7 concomitantly with induced COL2 expression rather point to disturbed cartilage homeostasis promoting cartilage degeneration in AS.

Indexed as

AdultAgedCartilage, ArticularCartilage DiseasesChondrocytesFemaleHumansMaleMiddle AgedSpondylitis, AnkylosingZygapophyseal Joint

Identifiers

PMID26123554
PMCPMC4506408
OpenAlexW1794411622

What OpenQuestion holds

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LicenceCC BY
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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.