LAUSR

Background Rheumatoid arthritis (RA) is an autoimmune rheumatic disease. Activated B- and T-lymphocytes, mast cells, macrophages, tissue fibroblasts play a leading role in its pathogenesis. The development of autoimmune inflammation is impossible without the influence of a large number of pro-inflammatory cytokines such as IL 1α and β, TNF α, IL 6, IL 17, IL 22. Currently, other classes of biologically active molecules, such as adiponectin, visfatin, nesfatin, fetuin A, are being actively studied in RA [1,2,3,4]. Pre-B-cell colony enhancing factor 1 (PBEF1) stimulates synthesis of matrix metalloproteinases and chemokines, supporting synovial inflammation caused by leukocyte infiltration. A positive correlation between visfatin and C-reactive protein confirms its role as a mediator of inflammation. It is believed that increased concentrations of PBEF1 can stimulate systemic inflammation. Objectives The study the relationship between serum PBEF1 level and disease activity in RA patients. Methods We observed 140 patients with a reliable diagnosis of RA, of whom 96 were women and 44 were men. The control group consisted of 20 women and 10 men aged from 22 to 55 years without complaints of pain in the joints during life. PBEF1 concentration in blood serum were determined by indirect enzyme-linked immunosorbent assay using commercial test systems (RaiBiotech, cat№ EIA-VIS-1) according to the manufacturer’s instructions. Results The level of normal values of PBEF1 in healthy individuals with a BMI of 18.5 to 24.9 kg/m2 was 0.14–3.9 ng/ml, with a BMI of 25 to 29.9 kg/m2–0 - 5.9 ng/ml. Elevated serum PBEF1 level was detected in 84.29% of RA patients. The ones with elevated PBEF1 levels of significantly more likely to have a higher degree of activity index DAS28 (χ2=48,293; p<0,001,), high level of anti-cyclic citrullinated peptide (anti-CCP) (χ2=5,386; p=0,0203), higher levels of C-reactive protein (χ2=8,159; p=0,0043), erythrocyte sedimentation rate (p<0,001), extra-articular manifestations of the disease (χ2=7,354; p=0,0067). Conclusion PBEF1 can be regarded as an important link in the pathogenesis of rheumatoid arthritis and for the potential molecule for biological therapeutic agents. References [1] Adiponectin determination in Rheumatoid Arthritis patients complicated by osteoporosis. L.Seewordova, J.Polyakova, B.Zavodovsky [et al]. Annals of the Rheumatic Diseases; 2016;Vol. 75, Suppl 2, p.970. DOI: 10.1136/annrheumdis-2016-eular.1076 [2] Laboratory markers of inflammation and serum Nicotinamide phosphoribosyltransferase level in Rheumatoid Arthritis patients. Y.Akhverdyan, B.Zavodovsky, J.Polyakova [et al]. Annals of the Rheumatic Diseases, 2017; Vol. 76, Suppl 2, P.1149. DOI: 10.1136/annrheumdis-2017-eular.1958. [3] Elevated Nesfatin-1 levels in patients with Rheumatoid arthritis/T.Kvlividze, B.Zavodovsky, Y.Akhverdyan [et al]//Annals of the Rheumatic Diseases 2018, Vol.77, P.A1762. DOI: 10.1136/annrheumdis-2018-eular.4459. [4] Fetuin-a: clinical and laboratory associations in women with Rheumatoid Arthritis. Papichev E., Sivordova L., Polyakova J [et al.]Annals of the Rheumatic Diseases2018; Vol.77; P.1228. DOI: 10.1136/annrheumdis-2018-eular.2111. Disclosure of Interests None declared