KEGG pathway analysis highlighted the six ranked pathways that were enriched among the DE IRGs: “cytokine–cytokine receptor interaction”, “neuroactive ligand–receptor interaction”, “viral protein interaction with cytokine and cytokine receptor”, “chemokine signaling pathway”, “rheumatoid arthritis”, and “JAK-STAT signaling pathway” (Figure 1D). Here, SOAT1 is linked to rheumatoid arthritis.