Original Article
 

Integrated Analysis of Circulating miR-22-3p, miR-126-3p, and miR-760 as Non-invasive Biomarkers for Rheumatoid Arthritis

Abstract

Rheumatoid arthritis (RA) is an autoimmune disease marked by chronic inflammation and progressive joint damage. Early diagnosis is crucial, but current methods lack sensitivity. Circulating microRNAs (miRs), stable in body fluids, have emerged as promising biomarkers. This study aims to evaluate the plasma expression levels of miR-22-3p, miR-126-3p, and miR-760 in patients with RA compared to healthy controls, and to assess their potential as diagnostic biomarkers.
Plasma samples from 50 RA patients and 50 healthy individuals were analyzed using quantitative real-time PCR (qRT-PCR). Correlation of miR expression with disease activity was evaluated, and their diagnostic value was assessed using receiver operating characteristic (ROC) curve analysis. Bioinformatics analysis was conducted to explore the various aspects and functions of the identified miRs. 
The plasma levels of miR-22-3p and miR-126-3p were significantly elevated in RA patients compared to healthy controls. Although miR-760 exhibited an upward trend, the increase did not reach statistical significance. miR-126-3p was positively associated with disease activity. ROC analysis showed area under the curve (AUC) of 0.69 for miR-22-3p, 0.72 for miR-126-3p, and 0.61 for miR-760, with the combined panel improving diagnostic accuracy to an AUC of 0.74. Furthermore, functional enrichment analysis suggested that these miRs are predominantly involved in key biological processes, including regulation of gene expression, cell migration, and epigenetic modifications.
A panel consisting of miR-22-3p, miR-126-3p, and miR-760 may serve as a potential diagnostic biomarker for RA. Further validation in larger and more diverse populations is warranted.

 

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Keywords
Biomarker MicroRNA miR-126-3p miR-22-3p miR-760 Rheumatoid arthritis

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1.
Raghibi A, Mohajeri Khorasani A, Damavandi E, Rostamian A, Abjoushak Mahmoudabad M, Choobineh H, Ghadami M, Kabuli M. Integrated Analysis of Circulating miR-22-3p, miR-126-3p, and miR-760 as Non-invasive Biomarkers for Rheumatoid Arthritis. Iran J Allergy Asthma Immunol. 2026;:1-20.