Initially, our studies showed that among the expression of T cell miRNAs affected by TNF-α in Jurkat cells, the expression levels of miR-139-3p, miR-204, miR-760, miR-383, miR-524-5p, miR-136, miR-548d-3p, and miR-214 were significantly decreased in RA T cells. The gene discussed is TNF; the disease is rheumatoid arthritis.