As biomarkers for IgA vasculitis, the severity of IgA vasculitis is associated with neutrophil/lymphocyte rate [129], serum neopterin and ischemia-modified albumin levels [130], skin miRNA-223-3p expression [131], and serum and urine levels of NGAL, KIM-1, and L-FABP [132]. The gene discussed is HAVCR1; the disease is Henoch-Schoenlein purpura.