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Erschienen in: Rheumatology International 8/2019

14.06.2019 | Observational Research

Characterization of cell-derived microparticles in synovial fluid and plasma of patients with rheumatoid arthritis

verfasst von: Benita Nancy Reni Michael, Vallayyachari Kommoju, Chengappa Kavadichanda Ganapathy, Vir Singh Negi

Erschienen in: Rheumatology International | Ausgabe 8/2019

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Abstract

Microparticles (MP) are proposed to play a role in the pathogenesis of rheumatoid arthritis (RA). This study aimed to profile cell lineage-specific MP in patients with RA, osteoarthritis (OA), and healthy controls (HC) in synovial fluid and circulation. Patients with RA (n = 40), OA (n = 30) and HC (n = 33) were included. Cell-free synovial fluid (SF) and platelet-poor plasma samples were stained with annexin V APC and antibodies against CD45, CD20, CD14, CD4, CD8, CD66b, and CD61 for multicolor flow cytometry. Mann–Whitney U test/unpaired T test was used to assess intergroup differences among RA and OA SF and clinical, serological phenotypes of RA based on normality distribution; Kruskal–Wallis test with Dunn’s multiple comparisons for comparing plasma MPs among RA, OA, and HC. Correlation between MP proportions and disease parameters was assessed by Spearman’s correlation. The proportion of annexin V+ MP in SF of patients with RA [5 (6.35)] [median (IQR)] was higher compared to OA [1.8 (1.35), p < 0.001] and plasma of patients with RA [3.45 (5.63)] compared to OA [1.85 (1.4)] and HC [0.9 (1.1), p < 0.001]. Leukocyte-derived [0.85 (1.17)], granulocyte-derived [0.4 (2.05)], monocyte-derived [0.4 (0.4)], and T cell-derived MP [CD4+ – 0.1 (0.1); CD8+ − 0.1(0.1)] were higher in RA SF (p < 0.001). Platelet-derived MP (PMP) were the major fraction [1.5 (4.23), p < 0.001] in RA plasma. Leukocyte-derived MP were higher in RA plasma [0.1 (0.2); p < 0.001) than OA and HC. Annexin V+ MP and PMP were higher in the SF of RA with extra-articular manifestations (n = 15), as compared to those without (n = 25) (p = 0.02; p < 0.01, respectively). High SF granulocyte-derived MP were observed in patients with established RA (n = 24), ACPA-positive RA (n = 32) compared to their negative counterparts (p = 0.03; p = 0.02, respectively). Our observations of higher proportions of cell-derived MP in the plasma and synovial fluid of DMARD-naïve RA patients, their clinical and serological phenotypes suggest their role in dynamic cross talk between the joint and systemic circulation, disease pathology, and progression.
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Metadaten
Titel
Characterization of cell-derived microparticles in synovial fluid and plasma of patients with rheumatoid arthritis
verfasst von
Benita Nancy Reni Michael
Vallayyachari Kommoju
Chengappa Kavadichanda Ganapathy
Vir Singh Negi
Publikationsdatum
14.06.2019
Verlag
Springer Berlin Heidelberg
Erschienen in
Rheumatology International / Ausgabe 8/2019
Print ISSN: 0172-8172
Elektronische ISSN: 1437-160X
DOI
https://doi.org/10.1007/s00296-019-04337-1

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