Objective To preliminarily investigate the prevalence and role of anti-lysosome-associated membrane protein-2 antibody( LAMP-2A) in myeloperoxidase-antineutrophil cytoplasmic antibody associated vasculitis( MPOAAV). Methods The peripheral blood from all patients was taken to detect LAMP-2A,myeloperoxidase-antineutrophil cytoplasmic antibody( MPO-ANCA),lysosome-associated membrane protein-2( LAMP-2),myeloperoxidase( MPO) and activated complement C5 a by ELISA. These test results and some of other clinical in...