CXCL8 and anti-neutrophil cytoplasmic antibody-associated vasculitis: Yokoseki also reported increased levels of IL-6, C-X-C motif ligand (CXCL)-8, and CXCL-10/IFN-γ inducible protein (IP)-10 in cerebrospinal fluid of HP with ANCA-associated vasculitis or IgG4-RD [10].