Finally, we revealed the relationship between the expression of IFI44 and the abundance of immune cells in RA by Pearson’s correlation coefficient analysis (Figure 13D), which showed that only activated DCs were closely and positively correlated with IFI44 (R = 0.68, P = 3.7e-39), and activated DCs were highly enriched in RA. This evidence concerns the gene IFI44 and rheumatoid arthritis.