Those with vasculitis (n=4) had significantly reduced IL-21 levels and FC of miR-124 (253 ± 147.4 and 0.04 ± 0.05 vs 586.3 ± 410.5 and 0.54 ± 0.8; p=0.008 and p=0.001, respectively). This evidence concerns the gene IL21 and vasculitis.