MPO and anti-neutrophil cytoplasmic antibody-associated vasculitis: The link between NET formation and ANCA-associated vasculitis has also been examined by analyzing how immune complexes with IgG can induce NETosis by activating neutrophils through the crosslinking of the Fcγ receptor IIIb 131 in patients with MPO-ANCA-associated microscopic polyangiitis 27,28.