IL17A and rheumatoid arthritis: The KEGG analysis showed that DEGs were associated with Th1, Th2, and Th17 cell differentiation, IL-17 signaling pathway, T cell receptor signaling pathway, leukocyte transendothelial migration, cell adhesion molecules, circadian entrainment, endocrine resistance, AGE-RAGE signaling pathway in diabetic complications, NF-κB signaling pathway, relaxin signaling pathway, MAPK signaling pathway, estrogen signaling pathway, and apoptosis, which might resemble the pathological process of rheumatoid arthritis (Figure 3C).