It is interesting to note the significant positive correlations between the serum DcR3 levels and Birmingham Vasculitis Activity Score (BVAS), myeloperoxidase (MPO), anti-neutrophil cytoplasmic antibody (ANCA) titer, white blood cell counts, serum creatinine levels, and serum C-reactive protein (CRP) levels in ANCA-associated vasculitis (AAV) [51]. This evidence concerns the gene MPO and anti-neutrophil cytoplasmic antibody-associated vasculitis.