Evidence map›Paper›PMID 32375861›Full record

ArticleArthritis research & therapy2020

Serum calprotectin: a promising biomarker in rheumatoid arthritis and axial spondyloarthritis.

Matthias Jarlborg, Delphine S Courvoisier, Céline Lamacchia, Laura Martinez Prat, Michael Mahler, Chelsea Bentow, Axel Finckh, Cem Gabay, Michael J Nissen, physicians of the Swiss Clinical Quality Management (SCQM) registry

Open access · goldAbstract read
In one paragraph

Article in Arthritis research & therapy, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 69 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
69citing papers in PubMed, 4 pooled it
6.4field-weighted citation impact, top 2% 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

69 citing papers in PubMed, 4 syntheses or guidelines pooled it, 113 citations in OpenAlex.

  1. Pooled it
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  12. Calprotectin and Sarcopenia in COPD: Biomarker, Bystander or Target?Journal of cachexia, sarcopenia and muscle · 2026
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9 more citing papers are in PubMed but not listed here.

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

10 authors at 2 institutions in 2 countries.

Matthias JarlborgGeneva University Hospital, 26 avenue de Beau-Séjour, 1206, Geneva, Switzerland. matthias.jarlborg@hcuge.ch.ORCID 0000-0002-0043-8761
Delphine S CourvoisierGeneva University Hospital, 26 avenue de Beau-Séjour, 1206, Geneva, Switzerland.
Céline LamacchiaGeneva University Hospital, 26 avenue de Beau-Séjour, 1206, Geneva, Switzerland.
Laura Martinez PratInova Diagnostics, Inc, San Diego, USA.
Michael MahlerInova Diagnostics, Inc, San Diego, USA.
Chelsea BentowInova Diagnostics, Inc, San Diego, USA.
Axel FinckhGeneva University Hospital, 26 avenue de Beau-Séjour, 1206, Geneva, Switzerland.
Cem GabayGeneva University Hospital, 26 avenue de Beau-Séjour, 1206, Geneva, Switzerland.
Michael J NissenGeneva University Hospital, 26 avenue de Beau-Séjour, 1206, Geneva, Switzerland.
physicians of the Swiss Clinical Quality Management (SCQM) registry
Hôpital Beau-Séjour · CHNova Medical (United States) · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundCalprotectin (S100A8/S100A9 protein) is known as a damage-associated molecular pattern (DAMP) protein and reflects mainly neutrophil activation. Serum calprotectin levels might be a good alternative to acute-phase protein as a biomarker in inflammatory rheumatic diseases. The aim of this study is to investigate the association of serum calprotectin with disease activity and severity in rheumatoid arthritis (RA), axial spondyloarthritis (axSpA), and psoriatic arthritis (PsA).

methodsSerum calprotectin was measured in patients with RA, axSpA, and PsA from the prospective Swiss Clinical Quality Management (SCQM) registry. Asymptomatic first-degree relatives of RA patients were used as healthy controls (HC). Outcomes included swollen joint count (SJC), Disease Activity Score (DAS), Health Assessment questionnaire (HAQ), joint radiographs, and ultrasound power Doppler (USPD) score for RA; Bath Ankylosing Spondylitis Disease Activity Index (BASDAI), Ankylosing Spondylitis Disease Activity Score (ASDAS) and coxitis for axSpA; and SJC and Disease Activity Index for PSoriatic Arthritis (DAPSA) for PsA. Comparison of outcomes by calprotectin quartile levels was performed using Kruskal-Wallis tests for continuous outcomes or trend tests for categorical outcomes.

resultsA total of 1729 subjects [RA = 969, axSpA = 451, PsA = 237, and HC = 72] were included. Median levels of serum calprotectin were higher in each disease group compared to HC (p < 0.01). In RA patients, all clinical outcomes were statistically different between quartiles of serum calprotectin, indicating an association between calprotectin levels and higher disease activity (SJC, DAS, and USPD scores) and severity (joint radiographs and HAQ). In axSpA, an association between calprotectin levels and ASDAS score (p < 0.01) and prevalence of coxitis (p = 0.02) was observed. For PsA patients, SJC and DAPSA did not differ across calprotectin quartiles.

conclusionsThis large study supports the association of serum calprotectin levels with disease activity in both RA and axSpA, but not in PsA.

Indexed as

Arthritis, PsoriaticArthritis, RheumatoidSpondylarthritisSpondylitis, AnkylosingAdultAgedBiomarkersFemaleHumansLeukocyte L1 Antigen ComplexMaleMiddle AgedProspective StudiesSeverity of Illness IndexBiomarkersLeukocyte L1 Antigen ComplexAxial spondyloarthritisBiomarkerPsoriatic arthritisRheumatoid arthritisS100A8/S100A9Serum calprotectin

Identifiers

PMID32375861
PMCPMC7201559
OpenAlexW3020864358

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.