Document Detail

Is presence of ANCA in crescentic IgA nephropathy a coincidence or novel clinical entity? A case series.
MedLine Citation:
PMID:  20042261     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: There are few anecdotal reports of circulating antineutrophil cytoplasmic autoantibodies (ANCAs) in patients with immunoglobulin A (IgA) nephropathy. STUDY DESIGN: Retrospective case series. SETTING & PARTICIPANTS: We studied 8 patients with crescentic IgA nephropathy associated with ANCAs against myeloperoxidase (n = 5) and proteinase 3 (n = 3) followed up for 2.4 +/- 1.7 years. They were compared with 26 patients with IgA nephropathy with > 10% crescentic glomeruli, but negative for ANCAs. OUTCOMES: We analyzed clinical and histologic features of patients and their response to treatment. MEASUREMENTS: Screening for ANCAs was performed using indirect immunofluorescence, and positive results were verified using enzyme-linked immunosorbent assay. RESULTS: All patients with crescentic IgA nephropathy and positive for ANCAs, compared with only one-third of ANCA-negative patients, presented with the clinical syndrome of rapid progressive glomerulonephritis. ANCA-positive patients reached a higher peak serum creatinine level within the first 3 months (4.2 +/- 2.2 vs 2.5 +/- 1.9 mg/dL; estimated glomerular filtration rate, 19.3 +/- 10.2 vs 45.9 +/- 30.1 mL/min/1.73 m(2)). ANCA-positive patients with IgA nephropathy had a higher percentage of crescentic glomeruli (54.3% +/- 18%) compared with ANCA-negative patients with crescentic IgA nephropathy (34.5% +/- 26%). ANCA-positive patients were treated using cyclophosphamide and corticosteroids. Kidney function improved in all these patients: serum creatinine level decreased from the peak of 4.2 +/- 2.2 to 1.7 +/- 0.7 mg/dL at the end of follow up (estimated glomerular filtration rate, 19.3 +/- 10.2 to 44.6 +/- 11.1 mL/min/1.73 m(2)). In contrast, no significant improvement was achieved in ANCA-negative patients. CONCLUSION: Patients with IgA nephropathy, crescents, and positive for ANCAs represent a clinical entity with a diverse more exaggerated clinical and histologic picture. However, disease in these patients responded well to aggressive immunosuppressive therapy.
Christos Bantis; Maria Stangou; Christoph Schlaugat; Efstathios Alexopoulos; Aphroditi Pantzaki; Dimitrios Memmos; Katrin Ivens; Peter J Heering
Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-12-30
Journal Detail:
Title:  American journal of kidney diseases : the official journal of the National Kidney Foundation     Volume:  55     ISSN:  1523-6838     ISO Abbreviation:  Am. J. Kidney Dis.     Publication Date:  2010 Feb 
Date Detail:
Created Date:  2010-02-01     Completed Date:  2010-02-22     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8110075     Medline TA:  Am J Kidney Dis     Country:  United States    
Other Details:
Languages:  eng     Pagination:  259-68     Citation Subset:  IM    
Copyright Information:
Copyright 2010 National Kidney Foundation, Inc. Published by Elsevier Inc. All rights reserved.
Department of Nephrology, Heinrich-Heine University of D?sseldorf, Germany.
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MeSH Terms
Antibodies, Antineutrophil Cytoplasmic / blood*
Glomerulonephritis, IGA / blood*,  classification
Middle Aged
Retrospective Studies
Reg. No./Substance:
0/Antibodies, Antineutrophil Cytoplasmic

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