DAILY VARIABILITY IN SOLUBLE TOLL-LIKE RECEPTORS 2 IN THE SERUM OF WOMEN WITH RHEUMATOID ARTHRITIS: ITS ASSOCIATION WITH THE DISEASE
DOI:
https://doi.org/10.11603/mcch.2410-681X.2019.v.i4.10820Keywords:
rheumatoid arthritis, toll-like receptor 2, circadian rhythmsAbstract
Introduction. Rheumatoid arthritis (RA) is a disease that associated with disorders of the circadian rhythms of proinflammatory mediators. Activation of immunoinflammatory and angiogenic processes in the synovium occurs with the participation of toll-like receptors 2 (TLR2). The study of the circadian rhythms of TLR2 productioin, in particular their soluble form (sTLR2) contained in biological fluids, will allow to personalize the prognosis of the disease and control the effectiveness of treatment in patients with RA.
The aim of the study – to find out the daily variability of sTLR2 in the serum of women with RA and to evaluate its association with the course of the disease.
Researh Methods. 173 patients with RA (100 % female) aged (43.7±7.35) years and 34 female of the control groups aged (42.4±10.5) years were examined. The diagnosis of RA was established by ACR/EULAR criteria 2010. Serum sTLR2 level was determined at 0800; 1400; 2000 and 0200 by Cloud-Clone Corp. (TLR2, SEA663Hu). The study was conducted in compliance with bioethical standards. Statistical processing of the results was performed in the SPSS22 application package.
Results and Discussion. Circadian oscillations of serum sTLR2 level with acrophase at 800 and batiphase at 2000 were found in healthy women. Patients with RA have circadian features of sTLR2 production: there is an increase in serum sTLR2 during the day (2 times) compared to the control group; variability in blood levels of sTLR2 in patients with RA is less significant, than in the control group; it was established a direct relationship between serum sTLR2 level, radiographic stage, and disease activity rates (DAS28, CDAI, HAQ, RAID).
Conclusions. Circadian variability of sTLR2 level in serum of women with RA and practically healthy subjects was established. In patients with RA, there is an increase in sTLR2 levels (more pronounced in the morning), which is associated with an increase in the severity of the disease.
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