ABCB5 and vasculitis: In skin sections from human vasculitis patients and from a murine immune complex-mediated vasculitis model of unbalanced neutrophil activation mimicking human vasculitis with unrestrained NET formation and severe tissue damage [87], immunostaining for ABCB5 and superoxide dismutase 3 (SOD3) revealed a significantly higher frequency of double-positive MSCs as compared with healthy controls [88].