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No Effect of Anti-TNF-α Treatment on Serum IL-17 in Patients with Rheumatoid Arthritis

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Date 2018 Dec 28
PMID 30588171
Citations 3
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Abstract

Introduction: Interleukin 17 (IL-17) and CC-chemokine ligand 20 (CCL20) are increasingly implicated in the pathogenesis of rheumatoid arthritis (RA). A correlation has been reported to exist between serum levels of IL-17 and CCL20 and the disease activity. However, such an effect has not been universally demonstrated. The aim of the present study was to investigate if serum levels of IL-17 and/or CCL20 reflect the disease activity and response to anti-TNF- therapy in patients with RA.

Material And Methods: Twenty-two RA patients qualified to receive anti-TNF- treatment were prospectively assessed before and after 12 weeks of therapy. Serum concentrations of IL-17 and CCL20 were measured with high-sensitivity immunoassays. Disease activity was assessed by the 28-joint disease activity score (DAS28).

Results: Twelve weeks of therapy resulted in a satisfactory therapeutic response in the majority (91%) of patients (reflected both by clinical and standard biochemical criteria). However, serum concentrations of IL-17 and CCL20 did not change significantly over the course of therapy Moreover, they did not correlate with the disease activity, patient characteristics, and their response to therapy.

Conclusions: Serum levels of IL-17 and CCL20 do not reflect changes in the clinical and biochemical status that occur in patients undergoing anti-TNF- treatment for RA. The lack of such an association indicates that IL-17 signalling is not affected by anti-TNF- therapy and is thus not critically involved in the disease pathogenesis.

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