Document Detail

Classification of antineutrophil cytoplasmic autoantibody vasculitides: the role of antineutrophil cytoplasmic autoantibody specificity for myeloperoxidase or proteinase 3 in disease recognition and prognosis.
MedLine Citation:
PMID:  23023777     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To compare the usefulness of 3 currently used classification systems in predicting the outcomes of treatment resistance, disease relapse, end-stage renal disease (ESRD), and death in patients with antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV).
METHODS: Three classification systems were applied to 502 patients with biopsy-proven AAV: 1) the Chapel Hill Consensus Conference (CHCC) definition with categories for granulomatosis with polyangiitis (GPA) (Wegener's), microscopic polyangiitis (MPA), and kidney-limited disease; 2) the European Medicines Agency (EMA) system with categories for GPA and MPA; and 3) classification based on ANCA with specificity for myeloperoxidase (MPO ANCA) versus ANCA with specificity for proteinase 3 (PR3 ANCA). Outcomes included treatment resistance, relapse, ESRD, and death. Proportional hazards models were compared between systems using an information-theoretic approach to rank models by predictive fit. Hazard ratios (HRs) with 95% confidence intervals (95% CIs) and P values are reported.
RESULTS: ANCA specificity was predictive of relapse, with PR3 ANCA-positive patients almost twice as likely to relapse as those with MPO ANCA (HR 1.89 [95% CI 1.33-2.69], P = 0.0004), and ANCA specificity had the best predictive model fit (model rank 1) compared to the CHCC and EMA systems. The CHCC and EMA systems did not predict relapse. By ANCA specificity, categories of GPA, MPA, and kidney-limited disease did not distinguish differences in probability of relapse-free survival. None of the systems predicted treatment resistance, ESRD, or death.
CONCLUSION: ANCA specificity independently predicts relapse among patients with AAV with renal disease. Classification and diagnostic systems that incorporate ANCA specificity, such as PR3 ANCA-positive MPA and MPO ANCA-positive MPA, provide a more useful tool than the clinical pathologic category alone for predicting relapse.
Sophia Lionaki; Elizabeth R Blyth; Susan L Hogan; Yichun Hu; Brent A Senior; Caroline E Jennette; Patrick H Nachman; J Charles Jennette; Ronald J Falk
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural    
Journal Detail:
Title:  Arthritis and rheumatism     Volume:  64     ISSN:  1529-0131     ISO Abbreviation:  Arthritis Rheum.     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-10-01     Completed Date:  2013-01-16     Revised Date:  2013-10-17    
Medline Journal Info:
Nlm Unique ID:  0370605     Medline TA:  Arthritis Rheum     Country:  United States    
Other Details:
Languages:  eng     Pagination:  3452-62     Citation Subset:  AIM; IM    
Copyright Information:
Copyright © 2012 by the American College of Rheumatology.
University of North Carolina, Chapel Hill, NC 27599, USA.
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MeSH Terms
Anti-Neutrophil Cytoplasmic Antibody-Associated Vasculitis / classification*,  diagnosis,  immunology
Antibodies, Antineutrophil Cytoplasmic / immunology*
Antibody Specificity*
Middle Aged
Myeloblastin / immunology*
Peroxidase / immunology*
Grant Support
Reg. No./Substance:
0/Antibodies, Antineutrophil Cytoplasmic; EC; EC
Comment In:
Arthritis Rheum. 2013 May;65(5):1405-6   [PMID:  23400524 ]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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