PMID- 19823088 OWN - NLM STAT- MEDLINE DCOM- 20100216 LR - 20091125 IS - 1531-6963 (Electronic) IS - 1040-8711 (Linking) VI - 22 IP - 1 DP - 2010 Jan TI - Pathogenesis of small vessel vasculitis associated with autoantibodies to neutrophil cytoplasmic antigens: new insights from animal models. PG - 15-20 LID - 10.1097/BOR.0b013e328332c9e4 [doi] AB - PURPOSE OF REVIEW: Morbidity and mortality associated with current treatment strategies in ANCA associated small vessel vasculitis (AASV) are unacceptably high and more specific therapies will require more detailed knowledge of the pathogenesis of the disease. In-vitro experiments have provided invaluable insight into the molecular mechanisms of antibody action and their subcellular effects; however, they may not reflect the in-vivo situation that can only be assessed in animal models. RECENT FINDINGS: Rodent models provide convincing evidence that myeloperoxidase (MPO) and antibodies to it can cause small vessel vasculitis but the development of rodent models of anti-proteinase 3 (PR3) antibody mediated injury is proving much more problematic. Insight into the molecular differences of the human and mouse antigens and antibodies to them as well as analysis of the molecular interaction with their binding partner(s) have highlighted potential resolutions to this discrepancy. The recent characterization of autoimmunity to lysosomal membrane glycoprotein-2 (LAMP-2) in AASV and the possible inductions of autoantibodies to it by molecular mimicry open an entirely new area for study. SUMMARY: Recent advances in the development of animal models that more faithfully model the disease and the discovery of novel ANCA antigens such as LAMP-2 provide new opportunities to dissect the mechanisms involved in the pathogenesis of AASV. FAU - Kain, Renate AU - Kain R AD - Institute of Clinical Pathology, Medical University of Vienna, Wahringer Gurtel, Vienna, Austria. renate.kain@meduniwien.ac.at FAU - Firmin, Dawn A AU - Firmin DA FAU - Rees, Andrew J AU - Rees AJ LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Review PL - United States TA - Curr Opin Rheumatol JT - Current opinion in rheumatology JID - 9000851 RN - 0 (Antibodies, Antineutrophil Cytoplasmic) RN - 0 (Autoantibodies) RN - 0 (Lysosomal-Associated Membrane Protein 2) SB - IM MH - Animals MH - Anti-Neutrophil Cytoplasmic Antibody-Associated Vasculitis/*immunology/physiopathology MH - Antibodies, Antineutrophil Cytoplasmic/*metabolism MH - Antibody Specificity/immunology MH - Autoantibodies/*metabolism MH - Autoimmunity/*immunology MH - Disease Models, Animal MH - Humans MH - Lysosomal-Associated Membrane Protein 2/metabolism MH - Mice MH - Molecular Mimicry/immunology MH - Neutrophils/immunology/metabolism MH - Species Specificity RF - 46 EDAT- 2009/10/14 06:00 MHDA- 2010/02/17 06:00 CRDT- 2009/10/14 06:00 PHST- 2009/10/14 06:00 [entrez] PHST- 2009/10/14 06:00 [pubmed] PHST- 2010/02/17 06:00 [medline] AID - 10.1097/BOR.0b013e328332c9e4 [doi] PST - ppublish SO - Curr Opin Rheumatol. 2010 Jan;22(1):15-20. doi: 10.1097/BOR.0b013e328332c9e4.