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Aim  The cytokines particularly tumor necrosis factor-alpha (TNF-α) have a substantial role in the pathophysiology of rheumatoid arthritis (RA). The goal of this study was to evaluate the role of serum TNF-α as a competent biomarker of disease activity in RA and to assess the correlation of serum TNF-α with DAS28-ESR (disease activity score-erythrocyte sedimentation rate in 28 joints) and other markers expressed in serum of RA patients.  Methodology  The study was conducted from May 2020 to October 2020 after approval from the Ethical Review Committee of Ziauddin University. This cross-sectional study included 90 diagnosed cases of RA from 30 to 65 years with the complaint of arthralgia. Patients from the rheumatology clinic were enrolled in the study by a non-probability consecutive sampling technique. Informed consent was taken from each patient and they were assessed through a set of questions based upon disability in the performance of daily activities due to RA. Evaluation of serum levels of anti-cyclic citrullinated peptide (ACCP), rheumatoid factor (RF), erythrocyte sedimentation rate, and TNF-α were done by enzyme-linked immunosorbent assay (ELISA). Patients were segregated into groups based upon DAS28-ESR with erythrocyte sedimentation rate as an inflammatory marker. The Kruskal Wallis test was applied for the comparison of different variables in these groups. Spearman correlation was applied for the association between different variables. Multiple variable analysis was performed to assess the predictability of disease activity by serum markers included in the study.  Results  The results of our study disclosed a significant difference in ACCP, TNF-α, tender joint count of 28 joints (TJ-28), swollen joint count of 28 joints (SJ-28), and health assessment questionnaire-disability index (HAQ-DI) in disease activity groups. A significant correlation of serum TNF-α with DAS28-ESR in RA patients was observed.  Conclusion  This study illustrated a significant correlation of serum TNF-α with DAS28-ESR in RA patients. We found that expression of serum TNF-α may intensify the inflammatory activity in early RA, therefore, RA patients must be screened for this cytokine to monitor that disease activity could be useful for patients undergoing anti-TNF therapy.

Serum Tumor Necrosis Factor-Alpha as a Competent Biomarker for Evaluation of Disease Activity in Early Rheumatoid Arthritis