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Blood chemokine profile in untreated early rheumatoid arthritis: CXCL10 as a disease activity marker

Artikel i vetenskaplig tidskrift
Författare Jayesh M. Pandya
Anna-Carin Lundell
Kerstin Andersson
Inger Nordström
Elke Theander
Anna Rudin
Publicerad i Arthritis Research and Therapy
Volym 19
Nummer/häfte 1
Sidor 20
ISSN 1478-6354
Publiceringsår 2017
Publicerad vid Institutionen för medicin, avdelningen för reumatologi och inflammationsforskning
Sidor 20
Språk en
Länkar dx.doi.org/10.1186/s13075-017-1224-...
Ämnesord Chemokine, Chemokine receptor, CXCL10, Multivariate discriminant analysis, Rheumatoid arthritis, T cell
Ämneskategorier Immunologi inom det medicinska området, Reumatologi och inflammation, Immunbiologi

Sammanfattning

© 2017 The Author(s).Background: We have recently analyzed the profile of T-cell subtypes based on chemokine receptor expression in blood from untreated early rheumatoid arthritis (ueRA) patients compared to healthy controls (HC). Here, we compared the levels of the respective chemokines in blood plasma of ueRA patients with those of HC. We also studied the association of chemokine levels with the proportions of circulating T-cell subsets and the clinical disease activity. Methods: Peripheral blood was obtained from 43 patients with ueRA satisfying the ACR 2010 criteria and who had not received any disease-modifying anti-rheumatic drugs (DMARD) or prednisolone, and from 14 sex- and age-matched HC. Proportions of T helper cells in blood, including Th0, Th1, Th2, Th17, Th1Th17, TFh, and regulatory T cells, were defined by flow cytometry. Fifteen chemokines, including several CXCL and CCL chemokines related to the T-cell subtypes as well as to other major immune cells, were measured in blood plasma using flow cytometry bead-based immunoassay or ELISA. Clinical disease activity in patients was evaluated by assessing the following parameters: Disease Activity Score in 28 joints (DAS28), Clinical Disease Activity Index (CDAI), swollen joint counts (SJC), tender joint counts (TJC), C-reactive protein (CRP), and erythrocyte sedimentation rate (ESR). The data were analyzed using multivariate factor analyses followed by univariate analyses. Results: Multivariate discriminant analysis showed that patients with ueRA were separated from HC based on the blood plasma chemokine profile. The best discriminators were CXCL9, CXCL10, CXCL13, CCL4, and CCL22, which were significantly higher in ueRA compared to HC in univariate analyses. Among the chemokines analyzed, only CXCL10 correlated with multiple disease activity measures, including DAS28-CRP, DAS28-ESR, CDAI, SJC in 66 joints, CRP, and ESR. Conclusions: High circulating levels of CXCL10 in the plasma of ueRA patients and the association with the clinical disease activity suggests that CXCL10 may serve as a disease activity marker in early rheumatoid arthritis.

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