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JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
REVIEW
New pathophysiological insights and treatment of ANCA-associated vasculitis.
Kidney International 2011 March
ANCA-associated-vasculitis (AAV) comprises three different diseases entities: Churg-Strauss syndrome, microscopic polyangiitis, and Wegener's granulomatosis. AAV is an autoimmune disease with complex pathophysiology. Anti-neutrophil cytoplasmic antibodies (ANCAs) with specificity for proteinase-3 (PR3) or myeloperoxidase (MPO) are hallmarks of AAV and have a pivotal role in disease development. In addition to ANCA, the cellular immune system contributes to the pathogenesis of the disease. ANCA-mediated degranulation of neutrophils causes vasculitic damage; T cells drive granuloma formation, promote vasculitic damage by several different pathways, and enhance autoantibody production by B cells. Recently, complementary PR3 and lysosomal membrane protein-2 were suggested as novel autoantigens in AAV. New findings also indicate the importance of complement, danger-associated molecular patterns, and dendritic cells in AAV. This review highlights novel pathophysiological findings in AAV and puts them into context with the current understanding of disease mechanisms. Furthermore, implications for present and new therapeutic strategies are discussed.
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