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Screm G, Mondini L, Confalonieri P, Salton F, Trotta L, Barbieri M, Mari M, Reccardini N, Della Porta R, Kodric M, Bandini G, Hughes M, Bellan M, Lerda S, Confalonieri M, Ruaro B. Nailfold Capillaroscopy Analysis Can Add a New Perspective to Biomarker Research in Antineutrophil Cytoplasmic Antibody-Associated Vasculitis. Diagnostics (Basel) 2024; 14:254. [PMID: 38337770 PMCID: PMC10854947 DOI: 10.3390/diagnostics14030254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 01/12/2024] [Accepted: 01/23/2024] [Indexed: 02/12/2024] Open
Abstract
BACKGROUND Antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV) includes granulomatosis with polyangiitis (GPA), microscopic polyangiitis (MPA), and eosinophilic granulomatosis with polyangiitis (EGPA), all of which are characterised by inflammation of small-medium-sized vessels. Progressive understanding of these diseases has allowed researchers and clinicians to start discussing nailfold video capillaroscopy (NVC) as a future tool for many applications in daily practice. Today, NVC plays a well-established and validated role in differentiating primary from secondary Raynaud's phenomenon correlated with scleroderma. Nevertheless, there has not been sufficient attention paid to its real potential in the ANCA-associated vasculitis. In fact, the role of NVC in vasculitis has never been defined and studied in a multicentre and multinational study. In this review, we carried out a literature analysis to identify and synthesise the possible role of capillaroscopy for patients with ANCA-associated vasculitis. METHODS Critical research was performed in the electronic archive (PUBMED, UpToDate, Google Scholar, ResearchGate), supplemented with manual research. We searched in these databases for articles published until November 2023. The following search words were searched in the databases in all possible combinations: capillaroscopy, video capillaroscopy, nailfold-video capillaroscopy, ANCA-associated vasculitis, vasculitis, granulomatosis with polyangiitis, EGPA, and microscopic polyangiitis. RESULTS The search identified 102 unique search results. After the evaluation, eight articles were selected for further study. The literature reported that capillaroscopy investigations documented non-specific abnormalities in 70-80% of AAV patients. Several patients showed neoangiogenesis, capillary loss, microhaemorrhages, and bushy and enlarged capillaries as the most frequent findings. Furthermore, the difference between active phase and non-active phase in AAV patients was clearly discernible. The non-active phase showed similar rates of capillaroscopy alterations compared to the healthy subjects, but the active phase had higher rates in almost all common abnormalities instead. CONCLUSIONS Microvascular nailfold changes, observed in patients affected by vasculitis, may correlate with the outcome of these patients. However, these non-specific abnormalities may help in the diagnosis of vasculitis. As such, new analysis analyses are necessary to confirm our results.
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Affiliation(s)
- Gianluca Screm
- Pulmonology Unit, Department of Medical Surgical and Healt Sciencies, University of Trieste, Hospital of Cattinara, 34149 Trieste, Italy; (G.S.)
| | - Lucrezia Mondini
- Pulmonology Unit, Department of Medical Surgical and Healt Sciencies, University of Trieste, Hospital of Cattinara, 34149 Trieste, Italy; (G.S.)
| | - Paola Confalonieri
- Pulmonology Unit, Department of Medical Surgical and Healt Sciencies, University of Trieste, Hospital of Cattinara, 34149 Trieste, Italy; (G.S.)
| | - Francesco Salton
- Pulmonology Unit, Department of Medical Surgical and Healt Sciencies, University of Trieste, Hospital of Cattinara, 34149 Trieste, Italy; (G.S.)
| | - Liliana Trotta
- Pulmonology Unit, Department of Medical Surgical and Healt Sciencies, University of Trieste, Hospital of Cattinara, 34149 Trieste, Italy; (G.S.)
| | - Mariangela Barbieri
- Pulmonology Unit, Department of Medical Surgical and Healt Sciencies, University of Trieste, Hospital of Cattinara, 34149 Trieste, Italy; (G.S.)
| | - Marco Mari
- Pulmonology Unit, Department of Medical Surgical and Healt Sciencies, University of Trieste, Hospital of Cattinara, 34149 Trieste, Italy; (G.S.)
| | - Nicolò Reccardini
- Pulmonology Unit, Department of Medical Surgical and Healt Sciencies, University of Trieste, Hospital of Cattinara, 34149 Trieste, Italy; (G.S.)
| | - Rossana Della Porta
- Pulmonology Unit, Department of Medical Surgical and Healt Sciencies, University of Trieste, Hospital of Cattinara, 34149 Trieste, Italy; (G.S.)
| | - Metka Kodric
- Pulmonology Unit, Department of Medical Surgical and Healt Sciencies, University of Trieste, Hospital of Cattinara, 34149 Trieste, Italy; (G.S.)
| | - Giulia Bandini
- Department of Experimental and Clinical Medicine, Division of Internal Medicine, University of Florence, Azienda Ospedaliero–Universitaria Careggi (AOUC), 50134 Florence, Italy
| | - Michael Hughes
- Division of Musculoskeletal and Dermatological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Salford Royal NHS Foundation Trust, Manchester M6 8HD, UK
| | - Mattia Bellan
- Department of Translational Medicine, Università del Piemonte Orientale (UPO), 28100 Novara, Italy
- Center for Autoimmune and Allergic Disease (CAAD), Università del Piemonte Orientale (UPO), 28100 Novara, Italy
- Azienda Ospedaliero–Universitaria, Maggiore della Carità, 28100 Novara, Italy
| | - Selene Lerda
- Graduate School, University of Milan, 20149 Milan, Italy
| | - Marco Confalonieri
- Pulmonology Unit, Department of Medical Surgical and Healt Sciencies, University of Trieste, Hospital of Cattinara, 34149 Trieste, Italy; (G.S.)
| | - Barbara Ruaro
- Pulmonology Unit, Department of Medical Surgical and Healt Sciencies, University of Trieste, Hospital of Cattinara, 34149 Trieste, Italy; (G.S.)
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Nel H, Davis B, Adler B, Gabbay E. Case report of osteolytic lesions in a patient with multisystem granulomatous disease. BMJ Case Rep 2021; 14:14/6/e242685. [PMID: 34108156 DOI: 10.1136/bcr-2021-242685] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
We present a case of a 70-year-old Caucasian woman with multisystem granulomatous disease involving her lungs, bones and lymph nodes. The patient initially presented with cervical lymphadenopathy and subsequently developed progressive breathlessness. Imaging revealed extensive mediastinal, hilar and intra-abdominal lymphadenopathy as well as bilateral pulmonary parenchymal infiltrates. Lymph node and lung biopsy confirmed non-necrotising granulomatous inflammation while a BAL showed scanty growth of Cryptococcus neoformans and moderate growth of Staphylococcus aureus The patient received intravenous ceftriaxone and had a good response to treatment. She also completed 3 months of oral fluconazole. Although a diagnosis of sarcoidosis was considered most likely, the patient was not initially started on systemic corticosteroids due to concern around possible infection and initial response to antimicrobials. However, her exercise tolerance gradually deteriorated. A craniofacial CT revealed multiple lytic lesions involving the skull and visualised cervical spine. Biopsy of a clivus lesion revealed non-necrotising granulomatous inflammation while fungal cultures and histopathological stains were negative. The patient was diagnosed with widespread sarcoidosis and she was initiated on prednisolone and methotrexate which led to marked clinical and radiological improvement.
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Affiliation(s)
- Henco Nel
- Sir Charles Gairdner Hospital, Nedlands, Western Australia, Australia
| | - Brad Davis
- SKG Radiology, St John of God Subiaco, Perth, Western Australia, Australia
| | - Brendan Adler
- Envision Medical Imaging, Perth, Western Australia, Australia
| | - Eli Gabbay
- School of Medicine, University of Notre Dame, Fremantle, Western Australia, Australia
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Ramponi G, Folci M, De Santis M, Damoiseaux JGMC, Selmi C, Brunetta E. The biology, pathogenetic role, clinical implications, and open issues of serum anti-neutrophil cytoplasmic antibodies. Autoimmun Rev 2021; 20:102759. [PMID: 33476813 DOI: 10.1016/j.autrev.2021.102759] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Accepted: 12/05/2020] [Indexed: 12/11/2022]
Abstract
Anti-neutrophil cytoplasmic antibodies (ANCA) are a group of autoantibodies, predominantly IgG, involved in the pathogenesis of several autoimmune disorders, detected either through indirect immunofluorescence or enzyme-linked immunosorbent assay. By means of indirect immunofluorescence, the main patterns are C-ANCA (cytoplasmic) and P-ANCA (perinuclear), while proteinase 3 (PR3) and myeloperoxidase (MPO) represent the main autoantigens in granulomatosis with polyangiitis and microscopic polyangiitis, both belonging to the family of ANCA-associated vasculitis (AAV). While several experiments established the pathogenicity of MPO-ANCA, evidence remains elusive for PR3-ANCA and an additional target antigen, i.e. LAMP2, has been postulated with specific clinical relevance. The presence of a subset of AAV without ANCA may be explained by the presence of further target antigens or the presence of molecules in blood which make ANCA undetectable. A rise in ANCA titers is not necessarily predictive of a flare of disease in AAV if not accompanied by clinical manifestations. ANCA may develop through variable mechanisms, such as autoantigen complementarity, apoptosis impairment, neutrophil extracellular traps dysfunction and molecular mimicry. We will provide herein a comprehensive review of the available evidence on the biological mechanisms, pathogenetic role, and clinical implications of ANCA testing and disease management. Further, we will address the remaining open challenges in the field, including the role of ANCA in inflammatory bowel disease and in cocaine-induced vasculitis.
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Affiliation(s)
- Giacomo Ramponi
- Humanitas Clinical and Research Center - IRCCS, 20089, Rozzano, Milan, Italy
| | - Marco Folci
- Humanitas Clinical and Research Center - IRCCS, 20089, Rozzano, Milan, Italy
| | - Maria De Santis
- Humanitas Clinical and Research Center - IRCCS, 20089, Rozzano, Milan, Italy
| | - Jan G M C Damoiseaux
- Central Diagnostic Laboratory, Maastricht University Medical Center, Maastricht, Netherlands
| | - Carlo Selmi
- Humanitas Clinical and Research Center - IRCCS, 20089, Rozzano, Milan, Italy; Department of Biomedical Sciences, Humanitas University, Milan, Italy.
| | - Enrico Brunetta
- Humanitas Clinical and Research Center - IRCCS, 20089, Rozzano, Milan, Italy
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4
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Guchelaar NAD, Waling MM, Adhin AA, van Daele PLA, Schreurs MWJ, Rombach SM. The value of anti-neutrophil cytoplasmic antibodies (ANCA) testing for the diagnosis of ANCA-associated vasculitis, a systematic review and meta-analysis. Autoimmun Rev 2020; 20:102716. [PMID: 33197574 DOI: 10.1016/j.autrev.2020.102716] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Accepted: 06/19/2020] [Indexed: 12/24/2022]
Abstract
The testing of anti-neutrophil cytoplasmic antibodies (ANCA) takes an important place in the diagnostic workup to ANCA-associated vasculitis (AAV). Nowadays, it is recommended to screen for the presence of PR3 and MPO specific antibodies first using immunoassay, without the need for ANCA measurement by indirect immunofluorescence (IIF). A literature search was performed to assess the diagnostic test value of ANCA IIF and PR3- and MPO-antibody immunoassay to diagnose AAV. This meta-analysis shows that the c-ANCA testing by IIF has a pooled sensitivity of 75.2% and a pooled specificity of 98.4%. For PR3-antibody immunoassay, the pooled sensitivity depended on the immunoassay method used, and ranged from 79.8% to 86.6%, whereas the pooled specificity ranged from 96.8% to 98.3%. For both p-ANCA IIF and MPO-antibody immunoassay (all methods) sensitivity varied considerably showing pooled values of respectively 46.3% and 58.1%, whereas respective pooled specificity was 91.4% and 95.6%. These findings support the 2017 international consensus that primary anti-PR3 and anti-MPO screening by immunoassay, based on superior immunoassay sensitivity without the need for IIF ANCA testing, improves the diagnostic workup of AAV.
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Affiliation(s)
- Niels A D Guchelaar
- Department of Internal Medicine, Allergy and Clinical Immunology, Erasmus MC University Medical Center, Rotterdam, the Netherlands
| | - Manon M Waling
- Department of Internal Medicine, Allergy and Clinical Immunology, Erasmus MC University Medical Center, Rotterdam, the Netherlands
| | - Anviti A Adhin
- Department of Internal Medicine, Allergy and Clinical Immunology, Erasmus MC University Medical Center, Rotterdam, the Netherlands
| | - Paul L A van Daele
- Department of Internal Medicine, Allergy and Clinical Immunology, Erasmus MC University Medical Center, Rotterdam, the Netherlands
| | - Marco W J Schreurs
- Department of Immunology, Laboratory Medical Immunology, Erasmus MC University Medical Center, Rotterdam, the Netherlands
| | - Saskia M Rombach
- Department of Internal Medicine, Allergy and Clinical Immunology, Erasmus MC University Medical Center, Rotterdam, the Netherlands.
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Romero-Sánchez C, Benavides-Solarte M, Galindo-Ibáñez I, Ospina-Caicedo AI, Parra-Izquierdo V, Chila-Moreno L, Villa A, Casas-Gómez MC, Angarita I, Bautista-Molano W, Romero-Álvarez V, Bello-Gualtero JM. Frequency of Positive ANCA Test in a Population With Clinical Symptoms Suggestive of Autoimmune Disease and the Interference of ANA in its Interpretation. REUMATOLOGIA CLINICA 2020; 16:473-479. [PMID: 30704921 DOI: 10.1016/j.reuma.2018.09.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 08/30/2018] [Accepted: 09/20/2018] [Indexed: 01/04/2023]
Abstract
BACKGROUND Antibodies against neutrophil cytoplasm (ANCA) are associated with vasculitis. There are different methods to determine their presence. The interference of antinuclear antibodies (ANA) in the differentiation between P-ANCA and C-ANCA patterns has been described. OBJECTIVE To determine the frequency of ANCA in a population with manifestations of autoimmune disease, and evaluate the interference of ANA in its interpretation. MATERIALS AND METHODS Retrospective, descriptive nonexperimental cross-sectional study, including 3,330 data. The presumptive diagnosis was autoimmune disease and a test for ANCA was requested. The ANCA and ANA determinations were made by indirect immunofluorescence, L-ANCA® and CytoBead® ANCA. Anti-proteinase 3 and anti-myeloperoxidase were detected by ELISA and CytoBead® ANCA. RESULTS ANCAs were positive in 10.21% and 12.64% of those positive for ANCA were positive for ANA. The inter-rater agreement statistic (Kappa) for anti-PR3 between CytoBead ANCA and ELISA was 100% (K=1.00; P<.05) and the agreement between anti- myeloperoxidase by ELISA and CytoBead® ANCA was high (K=0.94; P<.05). 30% of those with ANCAs had a diagnosis of a type of vasculitis; 20% of them had an autoimmune disease. CONCLUSIONS The results suggest an overestimated request for ANCAs as a diagnostic aid in primary care which was not addressed. For an adequate evaluation of ANCAs, the indirect immunofluorescence technique should be implemented for the control and confirmation with the determination of specific antigens for anti- proteinase 3 and anti- myeloperoxidase in any of the confirmatory assays. The high concordance shown by ANCA CytoBeads makes us consider the use of this alternative for the determination of ANCAs and the confirmation. Given the interference of ANAs, the ANA test by IFI in the presence of positive P-ANCA results is recommended in order to minimize "false positives".
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Affiliation(s)
- Consuelo Romero-Sánchez
- Servicio de Reumatología e Inmunología, Hospital Militar Central, Facultad de Medicina, Grupo de Inmunología Clínica Aplicada, Universidad Militar Nueva Granada, Bogotá, Colombia; Facultad de Medicina, Programa de Reumatología, Universidad de la Sabana, Chía, Colombia; Instituto de Referencia Andino, Bogotá, Colombia; Instituto UIBO, Universidad El Bosque, Bogotá, Colombia.
| | - Mario Benavides-Solarte
- Servicio de Reumatología e Inmunología, Hospital Militar Central, Facultad de Medicina, Grupo de Inmunología Clínica Aplicada, Universidad Militar Nueva Granada, Bogotá, Colombia
| | - Isabel Galindo-Ibáñez
- Facultad de Ciencias Básicas, Universidad Colegio Mayor de Cundinamarca, Bogotá, Colombia
| | - Ana Isabel Ospina-Caicedo
- Servicio de Reumatología e Inmunología, Hospital Militar Central, Facultad de Medicina, Grupo de Inmunología Clínica Aplicada, Universidad Militar Nueva Granada, Bogotá, Colombia
| | | | - Lorena Chila-Moreno
- Facultad de Ciencias Básicas, Universidad Colegio Mayor de Cundinamarca, Bogotá, Colombia
| | - Amanda Villa
- Instituto de Referencia Andino, Bogotá, Colombia
| | | | - Ignacio Angarita
- Facultad de Medicina, Programa de Reumatología, Universidad de la Sabana, Chía, Colombia
| | - Wilson Bautista-Molano
- Servicio de Reumatología e Inmunología, Hospital Militar Central, Facultad de Medicina, Grupo de Inmunología Clínica Aplicada, Universidad Militar Nueva Granada, Bogotá, Colombia; Instituto UIBO, Universidad El Bosque, Bogotá, Colombia
| | - Verónica Romero-Álvarez
- Servicio de Reumatología e Inmunología, Hospital Militar Central, Facultad de Medicina, Grupo de Inmunología Clínica Aplicada, Universidad Militar Nueva Granada, Bogotá, Colombia
| | - Juan Manuel Bello-Gualtero
- Servicio de Reumatología e Inmunología, Hospital Militar Central, Facultad de Medicina, Grupo de Inmunología Clínica Aplicada, Universidad Militar Nueva Granada, Bogotá, Colombia
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6
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Tariq E, Nishanth K, Arshid A, Miqdad M, Cancarevic I. Aortic Involvement in Antineutrophil Cytoplasmic Antibodies Vasculitis, a Coincidence or a Real Association? Cureus 2020; 12:e9690. [PMID: 32923282 PMCID: PMC7486114 DOI: 10.7759/cureus.9690] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Antineutrophil cytoplasmic antibodies (ANCA)-associated vasculitis (AAV) is a type of small-vessel vasculitis. It is unusual for ANCA to involve aorta. However, multiple cases have been found where ANCA involved large vessels, particularly the aorta. Among vasculitides, aortic vasculitis is a part of Takayasu arteritis (TAK). In this review article, we tried to find the mechanism behind the aortic involvement in AAV. PubMed was used as a primary search engine, and all the available cases of aortic, as well as large-vessel involvement in ANCA-associated vasculitis, were thoroughly reviewed. Very limited data was available that could provide the mechanism behind this involvement. It is observed that ANCA-associated aortitis is more common in immunocompromised people; however, cases in previously healthy individuals have also been found. Pathogenesis of ANCA-related aortitis is different from Takayasu arteritis and is more close to ANCA-associated small vasculitis. ANCA-related aortitis involves the aorta through the same mechanism as it uses to involve small vessels. This rare manifestation of ANCA-associated vasculitis could be life-threatening but has a good prognosis if timely diagnosed and treated. ANCA-associated vasculitis must be considered as a differential diagnosis while treating a case of aortitis. We believe that there is a need to revise the classification of different types of vasculitides, and physicians should be aware of the possible overlap between different forms of vasculitides.
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Affiliation(s)
- Ezza Tariq
- Medicine, California Institute of Behavioral Neurosciences & Psychology, Fairfield, USA.,Medicine, Nishtar Medical College, Multan, PAK
| | - Katukuri Nishanth
- Internal Medicine, California Institute of Behavioral Neurosciences & Psychology, Fairfield, USA
| | - Assam Arshid
- Surgery, California Institute of Behavioral Neurosciences & Psychology, Fairfield, USA
| | - Mohammed Miqdad
- Internal Medicine, California Institute of Behavioral Neurosciences & Psychology, Fairfield, SAU
| | - Ivan Cancarevic
- Internal Medicine, California Institute of Behavioral Neurosciences & Psychology, Fairfield, USA
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Zhang Y, Hess H. Inhibitors in Commercially Available 2,2′-Azino-bis(3-ethylbenzothiazoline-6-sulfonate) Affect Enzymatic Assays. Anal Chem 2019; 92:1502-1510. [DOI: 10.1021/acs.analchem.9b04751] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yifei Zhang
- Department of Biomedical Engineering, Columbia University, 351L Engineering Terrace, 1210 Amsterdam Avenue, New York, New York 10027, United States
| | - Henry Hess
- Department of Biomedical Engineering, Columbia University, 351L Engineering Terrace, 1210 Amsterdam Avenue, New York, New York 10027, United States
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8
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Bornstein G, Ben-Zvi I, Furie N, Grossman C. Clinical significance of positive anti-neutrophil cytoplasmic antibodies without evidence of anti-neutrophil cytoplasmic antibodies-associated vasculitis. Int J Rheum Dis 2019; 22:940-945. [PMID: 30729688 DOI: 10.1111/1756-185x.13483] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Revised: 11/07/2018] [Accepted: 01/02/2019] [Indexed: 11/29/2022]
Abstract
AIM Anti-neutrophil cytoplasmic antibodies (ANCA) have a role in the diagnostic workup of ANCA-associated vasculitis. However, the clinical significance of positive ANCA in the absence of vasculitis is yet to be determined. Therefore, we sought to investigate the clinical spectrum and rate of patients with a positive ANCA without evidence of vasculitis. METHODS Retrospective analysis of patients positive for cytoplasmic ANCA (C-ANCA) and proteinase 3 (PR3) or P-ANCA and myeloperoxidase (MPO) between 2007 and 2016 in the Chaim Sheba Medical Center, Israel. The proportion of patients who had no evidence of vasculitis among all patients with a positive C-ANCA/PR3 or P-ANCA/MPO was calculated according to tertiles of enzyme-linked immunosorbent assay (ELISA) antibody levels. RESULTS Among 113 patients who tested positive for C-ANCA/PR3 or P-ANCA/MPO, 68 (60.1%) had no evidence of vasculitis. ELISA antibody titers were significantly higher among patients with vasculitis than those without (6.2 vs 3.2, for C-ANCA/PR3 and 5.4 vs 2.6 for P-ANCA/MPO, P < 0.05). The proportion of patients without vasculitis among all patients with a positive C-ANCA/PR3 and among all patients with a positive P-ANCA/MPO declined in parallel to the increases in ELISA antibody level tertiles (96%, 57% and 22% in the 1st, 2nd and highest tertiles, respectively, for patients with C-ANCA/PR3 patients and 100%, 66% and 20% in the 1st, 2nd and highest tertiles, respectively, for patients with P-ANCA/MPO). CONCLUSION A significant proportion of patients with a positive C-ANCA/PR3 or P-ANCA/MPO do not have evidence of vasculitis, particularly those with low-medium ELISA antibody titers. Using a higher threshold of ANCA titers may be required to improve specificity.
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Affiliation(s)
- Gil Bornstein
- Department of Internal Medicine B and the Rheumatology Unit, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - Ilan Ben-Zvi
- Department of Internal Medicine F and the Rheumatology Unit, The Chaim Sheba Medical Center, Ramat Gan, Israel.,Sackler Faculty of Medicine, Tel-Aviv University, Tel Aviv, Israel
| | - Nadav Furie
- Department of Internal Medicine F and the Rheumatology Unit, The Chaim Sheba Medical Center, Ramat Gan, Israel.,Sackler Faculty of Medicine, Tel-Aviv University, Tel Aviv, Israel
| | - Chagai Grossman
- Department of Internal Medicine F and the Rheumatology Unit, The Chaim Sheba Medical Center, Ramat Gan, Israel.,Sackler Faculty of Medicine, Tel-Aviv University, Tel Aviv, Israel
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9
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Holding S. Challenges and opportunities from the revised international consensus on ANCA testing. Ann Clin Biochem 2019; 56:4-6. [DOI: 10.1177/0004563218778303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Stephen Holding
- Immunology Department, Hull Royal Infirmary, Hull, UK
- Medicine Department, Hull York Medical School, Hull, UK
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10
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Berden AE, Wester Trejo MAC, Bajema IM. Investigations in systemic vasculitis - The role of renal pathology. Best Pract Res Clin Rheumatol 2018; 32:83-93. [PMID: 30526900 DOI: 10.1016/j.berh.2018.10.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Revised: 10/18/2018] [Accepted: 10/22/2018] [Indexed: 11/29/2022]
Abstract
ANCA-associated vasculitis (AAV) describes a group of small-vessel vasculitides with frequent renal involvement. The first description of these conditions can be traced back to the 19th-century paper on necrotizing vasculitis by Kussmaul and Maier. Since then, our understanding of the pathogenesis has improved and the histopathological lesions have been described in detail. Characteristic histologic lesions in ANCA-associated glomerulonephritis (AAGN) are fibrinoid necrosis and crescents, often accompanied by tubulointerstitial inflammation. The discovery of ANCAs has not rendered renal biopsies obsolete in the diagnostic process. Currently, renal biopsies remain the gold standard for the diagnosis of AAV in conjunction with ANCA serology. In addition to diagnosis, renal biopsies are useful for patient prognosis. The evaluation of renal histological samples from patients with new-onset AAV who participated in clinical trials led to the proposal of the histopathological classification for AAGN. The prognostic value of this classification continues to be validated and an update is expected soon.
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Affiliation(s)
- Annelies E Berden
- Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands
| | | | - Ingeborg M Bajema
- Department of Pathology, Leiden University Medical Center, Leiden, the Netherlands.
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11
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Abstract
The 2016 European Vasculitis Society (EUVAS) meeting, held in Leiden, the Netherlands, was centered around phenotypic subtyping in antineutrophil cytoplasmic antibody (ANCA)–associated vasculitis (AAV). There were parallel meetings of the EUVAS petals, which here report on disease assessment; database; and long-term follow-up, registries, genetics, histology, biomarker studies, and clinical trials. Studies currently conducted will improve our ability to discriminate between different forms of vasculitis. In a project that involves the 10-year follow-up of AAV patients, we are working on retrieving data on patient and renal survival, relapse rate, the cumulative incidence of malignancies, and comorbidities. Across Europe, several vasculitis registries were developed covering over 10,000 registered patients. In the near future, these registries will facilitate clinical research in AAV on a scale hitherto unknown. Current studies on the genetic background of AAV will explore the potential prognostic significance of genetic markers and further refine genetic associations with distinct disease subsets. The histopathological classification of ANCA-associated glomerulonephritis is currently evaluated in light of data coming out of a large international validation study. In our continuous search for biomarkers to predict clinical outcome, promising new markers are important subjects of current research. Over the last 2 decades, a host of clinical trials have provided evidence for refinement of therapeutic regimens. We give an overview of clinical trials currently under development, and consider refractory vasculitis in detail. The goal of EUVAS is to stimulate ongoing research in clinical, serological, and histological management and techniques for patients with systemic vasculitis, with an outlook on the applicability for clinical trials.
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12
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Bossuyt X, Cohen Tervaert JW, Arimura Y, Blockmans D, Flores-Suárez LF, Guillevin L, Hellmich B, Jayne D, Jennette JC, Kallenberg CGM, Moiseev S, Novikov P, Radice A, Savige JA, Sinico RA, Specks U, van Paassen P, Zhao MH, Rasmussen N, Damoiseaux J, Csernok E. Position paper: Revised 2017 international consensus on testing of ANCAs in granulomatosis with polyangiitis and microscopic polyangiitis. Nat Rev Rheumatol 2017; 13:683-692. [PMID: 28905856 DOI: 10.1038/nrrheum.2017.140] [Citation(s) in RCA: 230] [Impact Index Per Article: 32.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Anti-neutrophil cytoplasmic antibodies (ANCAs) are valuable laboratory markers used for the diagnosis of well-defined types of small-vessel vasculitis, including granulomatosis with polyangiitis (GPA) and microscopic polyangiitis (MPA). According to the 1999 international consensus on ANCA testing, indirect immunofluorescence (IIF) should be used to screen for ANCAs, and samples containing ANCAs should then be tested by immunoassays for proteinase 3 (PR3)-ANCAs and myeloperoxidase (MPO)-ANCAs. The distinction between PR3-ANCAs and MPO-ANCAs has important clinical and pathogenic implications. As dependable immunoassays for PR3-ANCAs and MPO-ANCAs have become broadly available, there is increasing international agreement that high-quality immunoassays are the preferred screening method for the diagnosis of ANCA-associated vasculitis. The present Consensus Statement proposes that high-quality immunoassays can be used as the primary screening method for patients suspected of having the ANCA-associated vaculitides GPA and MPA without the categorical need for IIF, and presents and discusses evidence to support this recommendation.
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Affiliation(s)
- Xavier Bossuyt
- Department of Microbiology and Immunology, University of Leuven and Department of Laboratory Medicine, University Hospitals Leuven, Leuven, Herestraat 49, 3000 Leuven, Belgium
| | | | - Yoshihiro Arimura
- Kichijoji Asahi Hospital, 11-30-12 Kichijoji Honcho, Musashino, Tokyo 181-8611, Japan
| | - Daniel Blockmans
- Clinical Department of General Internal Medicine, Research Department of Microbiology and Immunology and Laboratory of Clinical Infectious and Inflammatory Disorders, University Hospitals Leuven, Leuven, Herestraat 49, 3000 Leuven, Belgium
| | - Luis Felipe Flores-Suárez
- Primary Systemic Vasculitides Clinic, Instituto Nacional de Enfermedades Respiratorias, Calzada de Tlalpan 4502, Colonia Sección XVI, CP 14080, Mexico City, Mexico
| | - Loïc Guillevin
- National Referral Centre for Necrotizing Vasculitides and Systemic Sclerosis, Université Paris Descartes, Hôpital Cochin, L'Assistance Publique-Hôpitaux de Paris, 27 Rue du Faubourg Saint-Jacques, Paris 75014, France
| | - Bernhard Hellmich
- Department of Internal Medicine, Rheumatology and Immunology, Vasculitis-Centre Tübingen-Kirchheim, Medius Klinik Kirchheim, University of Tübingen, Eugenstrasse 3, 73230 Kirchheim unter Teck, Germany
| | - David Jayne
- Department of Medicine, University of Cambridge, Addenbrooke's Hospital, Hills Road, Cambridge, CB2 0SP, UK
| | - J Charles Jennette
- Department of Pathology and Laboratory Medicine, University of North Carolina, 160 Medical Drive, Chapel Hill, North Carolina 27599, USA
| | - Cees G M Kallenberg
- Department of Rheumatology and Clinical Immunology, AA21, University Medical Centre Groningen, University of Groningen, PO Box 30.001, 9700 RB Groningen, Netherlands
| | - Sergey Moiseev
- Clinic of Nephrology, Internal and Occupational Diseases, Sechenov First Moscow State Medical University, Rossolimo, 11/5, Moscow 119435, Russia
| | - Pavel Novikov
- Clinic of Nephrology, Internal and Occupational Diseases, Sechenov First Moscow State Medical University, Rossolimo, 11/5, Moscow 119435, Russia
| | - Antonella Radice
- Microbiology and Virology Institute, ASST Santi Paolo e Carlo, San Carlo Borromeo Hospital, Via Pio II 3, 20153 Milan, Italy
| | - Judith Anne Savige
- Department of Medicine, Melbourne Health, The University of Melbourne, Grattan Street, Parkville, Melbourne VIC 3050, Australia
| | - Renato Alberto Sinico
- Department of Medicine and Surgery, Università degli Studi di Milano-Bicocca, Via Cadore, 48, 20900 Monza MB, Italy
| | - Ulrich Specks
- Division of Pulmonary & Critical Medicine, Mayo Clinic, Rochester, 200 First Street, Rochester, Minnesota 55905, USA
| | - Pieter van Paassen
- Department of Internal Medicine, Section Nephrology and Immunology, Maastricht University Medical Centre, P. Debyelaan 25, 6229 HX Maastricht, Netherlands
| | - Ming-Hui Zhao
- Renal Division, Peking University First Hospital; Key Laboratory of Renal Disease, Ministry of Health of China; Key Laboratory of CKD Prevention and Treatment, Ministry of Education of China; Peking-Tsinghua Centre for Life Sciences; 8 Xishiku Street, Xichengqu, Beijing Shi, China
| | - Niels Rasmussen
- Department of Autoimmunology and Biomarkers, Statens Seruminstitut, Artillerivej 5, 2300 Copenhagen S, Denmark
| | - Jan Damoiseaux
- Central Diagnostic Laboratory, Maastricht University Medical Centre, P. Debyelaan 25, 6229 HX Maastricht, Netherlands
| | - Elena Csernok
- Department of Internal Medicine, Rheumatology and Immunology, Vasculitis-Centre Tübingen-Kirchheim, Medius Klinik Kirchheim, University of Tübingen, Eugenstrasse 3, 73230 Kirchheim unter Teck, Germany
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Bahmer T, Romagnoli M, Girelli F, Claussen M, Rabe KF. The use of auto-antibody testing in the evaluation of interstitial lung disease (ILD) – A practical approach for the pulmonologist. Respir Med 2016; 113:80-92. [DOI: 10.1016/j.rmed.2016.01.019] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Revised: 10/27/2015] [Accepted: 01/28/2016] [Indexed: 11/29/2022]
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Jayne D, Rasmussen N. Twenty-five years of European Union collaboration in ANCA-associated vasculitis research. Nephrol Dial Transplant 2015; 30 Suppl 1:i1-7. [PMID: 25805742 DOI: 10.1093/ndt/gfv060] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
This special edition reviews the progress in understanding of systemic vasculitis associated with autoantibodies to neutrophil cytoplasmic antigens (ANCA). European research groups have contributed to this research including the original observations of the association between ANCA and vasculitis. Areas of interest include classification and epidemiology, genetics and pathogenesis, disease assessment, histology and long-term outcomes. Clinical trials conducted by the European Vasculitis Study group have helped to define the current standard of care for the treatment of patients with vasculitis and provided a platform for the investigation of newer therapies. The prognosis of patients with ANCA-associated vasculitis has improved over this period as a result of facilitated diagnosis and development of consensus, evidence-based, treatment recommendations. The ANCA story represents an example of the power of a biomarker in influencing a disease area, inspiring research and providing physicians with better tools to treat patients with these disorders.
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Affiliation(s)
- David Jayne
- Department of Medicine, University of Cambridge, Cambridge, UK
| | - Niels Rasmussen
- Department of Otolaryngology, Rigshospitalet, Copenhagen, Denmark
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Watts RA, Mahr A, Mohammad AJ, Gatenby P, Basu N, Flores-Suárez LF. Classification, epidemiology and clinical subgrouping of antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis. Nephrol Dial Transplant 2015; 30 Suppl 1:i14-22. [PMID: 25805746 DOI: 10.1093/ndt/gfv022] [Citation(s) in RCA: 153] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
It is now 25 years since the first European studies on vasculitis--the anti-neutrophil cytoplasmic antibody (ANCA) standardization project. Over that period of time, there have been major developments in the classification of the vasculitides, which has permitted the conduct of high-quality epidemiology studies. Studying the epidemiology of rare diseases such as the ANCA-associated vasculitides (AAV) poses considerable challenges to epidemiologists. The first is the need for a clear definition of a case with good differentiation from similar disorders. The second is case capture. The vasculitides are rare, and therefore, a large population is required to determine the incidence and prevalence, and this poses questions of feasibility. A large population increases the risk of incomplete case detection but permits a reasonable number of cases to be collected in a practicable time frame, whereas a smaller population requires a much longer time frame to collect the necessary cases, which may also not be feasible. Statistical methods of capture-recapture analysis enable estimates to be made of the number of missing cases. The third is case ascertainment. The AAV are virtually always managed in secondary care, and therefore, hospital-based case ascertainment may be appropriate. Fourthly, the rarity of the conditions makes prospective case-control studies investigating risk factors difficult to conduct because the population size required to achieve statistical confidence is in excess of that which is readily available. Thus, much of the data on risk factors are derived from retrospective studies with inherent potential bias.
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Affiliation(s)
- Richard A Watts
- Department of Rheumatology, Ipswich Hospital and Norwich Medical School, University of East Anglia, Norwich, UK
| | - Alfred Mahr
- Department of Internal Medicine, Hospital Saint-Louis, University Paris 7, Paris, France
| | - Aladdin J Mohammad
- Department of Clinical Sciences, Rheumatology, Lund University, Lund, Sweden Vasculitis and Lupus Clinic, Addenbrooke's Hospital, Cambridge, UK
| | - Paul Gatenby
- Department of Immunology, The Canberra Hospital and Medical School Australian National University, Canberra, Australia
| | - Neil Basu
- Musculoskeletal Collaboration (Epidemiology Group), University of Aberdeen, Aberdeen, UK
| | - Luis Felipe Flores-Suárez
- Primary Systemic Vasculitides Clinic, Instituto Nacional de Enfermedades Respiratorias, Mexico City, Mexico
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Taylor SRJ, Salama AD, Pusey CD, Lightman S. Ocular manifestations of Wegener’s granulomatosis. EXPERT REVIEW OF OPHTHALMOLOGY 2014. [DOI: 10.1586/17469899.2.1.91] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Wakefield D, Di Girolamo N, Thurau S, Wildner G, McCluskey P. Scleritis: Immunopathogenesis and molecular basis for therapy. Prog Retin Eye Res 2013; 35:44-62. [PMID: 23454614 DOI: 10.1016/j.preteyeres.2013.02.004] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2012] [Revised: 02/10/2013] [Accepted: 02/15/2013] [Indexed: 12/19/2022]
Abstract
Scleritis is a heterogeneous group of diseases characterized by inflammation of the sclera, which may be due to local or systemic infections or immune mediated diseases. Numerous studies over the last decade have lead to significant progress in understanding the pathogenesis and treatment of this severe and potentially blinding disease. Immunological investigations of non-infectious scleritis and associated diseases have indicated that scleritis is an autoimmune disease and studies on the nature of the local inflammatory response have revealed the prominent role of T and B cells and cytokines, such as TNF-alpha, which in turn has resulted in clinical trials showing the effectiveness of local steroid treatment, anti-TNF and anti-B cell therapy. The widespread use of imaging has led to the realization that posterior scleritis is more common than previously recognized and testing for ANCA antibodies has revealed the prominent role of immune mechanisms in a subset of patients with scleritis and associated systemic vasculitis.
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Affiliation(s)
- Denis Wakefield
- School of Medical Sciences, UNSW Medicine, University of New South Wales, Sydney, NSW 2052, Australia.
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Knütter I, Hiemann R, Brumma T, Büttner T, Großmann K, Cusini M, Pregnolato F, Borghi MO, Anderer U, Conrad K, Reinhold D, Roggenbuck D, Csernok E. Automated interpretation of ANCA patterns - a new approach in the serology of ANCA-associated vasculitis. Arthritis Res Ther 2012; 14:R271. [PMID: 23241527 PMCID: PMC3674631 DOI: 10.1186/ar4119] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2012] [Accepted: 12/11/2012] [Indexed: 12/19/2022] Open
Abstract
Introduction Indirect immunofluorescence (IIF) employing ethanol-fixed neutrophils (ethN) is still the method of choice for assessing antineutrophil cytoplasmic antibodies (ANCA) in ANCA-associated vasculitides (AAV). However, conventional fluorescence microscopy is subjective and prone to high variability. The objective of this study was to evaluate novel pattern recognition algorithms for the standardized automated interpretation of ANCA patterns. Methods Seventy ANCA-positive samples (20 antimyeloperoxidase ANCA, 50 antiproteinase3 ANCA) and 100 controls from healthy individuals analyzed on ethN and formalin-fixed neutrophils (formN) by IIF were used as a 'training set' for the development of pattern recognition algorithms. Sera from 342 patients ('test set') with AAV and other systemic rheumatic and infectious diseases were tested for ANCA patterns using the novel pattern recognition algorithms and conventional fluorescence microscopy. Results Interpretation software employing pattern recognition algorithms was developed enabling positive/negative discrimination and classification of cytoplasmic ANCA (C-ANCA) and perinuclear ANCA (P-ANCA). Comparison of visual reading of the 'test set' samples with automated interpretation revealed Cohen's kappa (κ) values of 0.955 on ethN and 0.929 on formN for positive/negative discrimination. Analysis of the 'test set' with regard to the discrimination between C-ANCA and P-ANCA patterns showed a high agreement for ethN (κ = 0.746) and formN (κ = 0.847). There was no significant difference between visual and automated interpretation regarding positive/negative discrimination on ethN and formN, as well as ANCA pattern recognition (P > 0.05, respectively). Conclusions Pattern recognition algorithms can assist in the automated interpretation of ANCA IIF. Automated reading of ethN and formN IIF patterns demonstrated high consistency with visual ANCA assessment.
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20
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Guillevin L, Terrier B. Classification des vascularites systémiques. Presse Med 2012; 41:986-95. [DOI: 10.1016/j.lpm.2012.06.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2012] [Revised: 06/16/2012] [Accepted: 06/22/2012] [Indexed: 10/28/2022] Open
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Radice A, Bianchi L, Sinico RA. Anti-neutrophil cytoplasmic autoantibodies: methodological aspects and clinical significance in systemic vasculitis. Autoimmun Rev 2012; 12:487-95. [PMID: 22921790 DOI: 10.1016/j.autrev.2012.08.008] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Antineutrophil cytoplasmic antibodies (ANCA) are the serological hallmark of some idiopathic systemic vasculitides, such as granulomatosis with polyangiitis (GPA), microscopic polyangiitis (MPA) and, to a lesser extent, Churg-Strauss syndrome (CCS), the so-called ANCA-associated vasculitides (AAV). ANCA were first detected by immunofluorescence (IIFT), subsequently the target antigens myeloperoxidase (MPO) and proteinase 3 (PR3) were identified, allowing the development of the quantitative, antigen-specific assays. According to the guidelines, combining IIFT and PR3-ANCA/MPO-ANCA assures the optimal diagnostic specificity. Antigen specificity does not effectively differentiate among the different AAV, however C-ANCA/PR3-ANCA are mainly found in GPA, while P-ANCA/MPO-ANCA are more prevalent in MPA and CSS. Despite their diagnostic value, the performance of the widespread immunometric assays for ANCA testing is disappointing, particularly for the low sensitivity. In recent years, more "sensitive" assays have been developed, using the microplate as well as fully the automated technologies, with promising preliminary results. ANCA, may be detected in a number of pathological conditions other than small vessel vasculitis. However, in most of these non-vasculitic patients ANCA do not recognize MPO or PR3 as target antigens, but other granulocyte components, often multiple or unknown specificities. A positive ANCA result by itself is not diagnostic for AAV, clinical evidence and possibly histological confirmation are always required. On the other hand, a negative test result cannot completely rule out a diagnosis of AAV, as AAV without detectable ANCA exist. The appropriate use of ANCA testing strongly improves the diagnostic accuracy and clinical usefulness of the results.
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Affiliation(s)
- Antonella Radice
- Microbiology Institute, San Carlo Borromeo Hospital, Milan, Italy.
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22
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Chew HC, Chan YM, Issam AJ, Koh MS. A patient with hearing loss, mediastinal lymphadenopathy, and cavitatory pulmonary nodules. Chest 2011; 138:1500-4. [PMID: 21138887 DOI: 10.1378/chest.09-2599] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Affiliation(s)
- Huck Chin Chew
- Department of Respiratory and Critical Care Medicine, Singapore General Hospital, Outram Rd, Singapore.
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23
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Parker NP, Pearlman AN, Conley DB, Kern RC, Chandra RK. The dilemma of midline destructive lesions: a case series and diagnostic review. Am J Otolaryngol 2010; 31:104-9. [PMID: 20015726 DOI: 10.1016/j.amjoto.2008.11.010] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2008] [Revised: 11/19/2008] [Accepted: 11/30/2008] [Indexed: 10/21/2022]
Abstract
BACKGROUND Midline destructive lesions (MDLs) of the nose are a diagnostic dilemma due to an extensive differential diagnosis and vague presenting signs and symptoms. Etiologies may be neoplastic, autoimmune, traumatic, infectious, or unknown. STUDY DESIGN Case series and review of the literature were done. METHODS Medical records of 8 patients presenting with an MDL were reviewed. RESULTS Each patient received nasal endoscopy, computed tomography scan of the sinuses, laboratory workup, culture (aerobes, anaerobes, fungus, and acid-fast bacilli), and biopsy with flow cytometry. Laboratory tests included complete blood count, basic metabolic panel, erythrocyte sedimentation rate, angiotensin-converting enzyme, antineutrophil antibodies, rheumatoid factor, anti-Ro and anti-La antibodies, Epstein-Barr virus antibodies, coccidiomycosis serology, HIV antibodies, fluorescent treponemal antibody absorption, classic antineutrophil cytoplasmic antibodies, perinuclear antineutrophil cytoplasmic antibody, proteinase 3, and myeloperoxidase. Choice of diagnostic study was individualized for each patient. Two patients were diagnosed with natural killer/T-cell lymphoma, 2 were diagnosed with Wegener's granulomatosis, and 4 remained idiopathic, despite the extensive workup. A diagnostic algorithm to aid in the approach to MDLs is presented. CONCLUSIONS The diagnosis of MDLs remains difficult but is aided by a systematic approach and familiarity with multiple diagnostic techniques. It is imperative to take multiple tissue specimens from various sites, send them fresh, and communicate suspicion of lymphoma. Despite diagnostic advances and improved understanding of the diseases underlying MDLs, an etiology is often not identified.
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Mutsaers ER, Witteveen R, van den Bosch-Ruis W, Kuijpers TW, van Houten MA, van den Berg JM. A pseudoleukemic blood differentiation in a 13-year-old child: an extraordinary presentation of Churg-Strauss syndrome. Clin Rheumatol 2009; 32 Suppl 1:S7-9. [PMID: 19756836 PMCID: PMC3594815 DOI: 10.1007/s10067-009-1265-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2009] [Accepted: 08/14/2009] [Indexed: 11/25/2022]
Abstract
Churg-Strauss syndrome (CSS) is a rare systemic vasculitis of the small- and medium-size vessels. It is mostly seen in elderly patients presenting as de novo asthma, eosinophilia, and vasculitic organ involvement. In childhood, CSS is extremely rare. The course of pediatric CSS is usually severe and often lethal. We present a case of a 13-year-old girl with a short history of asthma, marked eosinophilia, and multiorgan involvement. The extremely high level of blood eosinophilic granulocytes (51.6 × 109/L) prompted a workup for eosinophilic leukemia before the diagnosis CSS could be made. Subsequently, the disease was successfully treated. This case report shows a classical case of childhood CSS, remarkable because of the presence of extreme hypereosinophilia. It underlines the importance of CSS as a life-threatening cause of hypereosinophilia in children.
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Affiliation(s)
- E R Mutsaers
- Department of Pediatrics, Spaarne Ziekenhuis, Hoofddorp, The Netherlands
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Drooger JC, Dees A, Swaak AJG. ANCA-Positive Patients: The Influence of PR3 and MPO Antibodies on Survival Rate and The Association with Clinical and Laboratory Characteristics. Open Rheumatol J 2009; 3:14-7. [PMID: 19461938 PMCID: PMC2684710 DOI: 10.2174/1874312900903010014] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2009] [Revised: 02/16/2009] [Accepted: 02/19/2009] [Indexed: 12/02/2022] Open
Abstract
Objectives: To compare the survival rate, and the clinical and laboratory characteristics in patients, characterized by the presence of certain anti-neutrophil cytoplasmic auto-antibodies (ANCAs). Methods: In a retrospective observational study, we analyzed the data of all patients with a positive ANCA test between 1995 and 2005 at our hospital. Based on serology patients were divided in three subgroups (ANCA-Proteinase 3 (PR3), ANCA-Myeloperoxidase (MPO) and atypical ANCA), irrespective of the diagnosis. Patient survival was compared by Kaplan Meier survival analysis. Differences in clinical and laboratory characteristics between the groups of specific ANCAs were determined. Results: Fifty-four ANCA-positive patients were analyzed. Eighteen of these patients were ANCA-PR3-positive, 17 were ANCA-MPO-positive and 19 had a atypical ANCA. A random control group was created of matched ANCA negative patients. Average follow-up time was 52 months. The calculated five year survival rate in respectively the ANCA-PR3- positive group, the ANCA-MPO-positive group, the atypical ANCA group and the ANCA-negative group was 45%, 81%, 90% and 100%. (P = 0.012, Wilcoxon test). A higher mean leukocyte count, a higher mean erythrocyte sedimentation rate and more fever was observed in the ANCA-PR3-positive group compared to the ANCA-MPO-positive group. Conclusions: A remarkable lower survival rate was observed in ANCA-PR3-positive patients compared to ANCA-MPO-positive patients. We also demonstrated that patients characterized by the presence of a defined ANCA differ in clinical and laboratory characteristics.
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Affiliation(s)
- J C Drooger
- Departments of Internal Medicine and Rheumatology, Ikazia Hospital, Postbus 5009, 3008 AA, Rotterdam, The Netherlands
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Beauvillain C, Delneste Y, Renier G, Jeannin P, Subra JF, Chevailler A. Antineutrophil cytoplasmic autoantibodies: how should the biologist manage them? Clin Rev Allergy Immunol 2008; 35:47-58. [PMID: 18176846 DOI: 10.1007/s12016-007-8071-9] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Antineutrophil cytoplasmic antibodies (ANCA) are directed against enzymes found in the granules of the polymorphonuclear (PMN) leukocytes. They are detected by indirect immunofluorescence microscopy assays on human ethanol fixed neutrophils. Three different fluorescence patterns can be distinguished: a cytoplasmic pattern (cANCA), a perinuclear pattern (pANCA), and an atypical pattern (aANCA). The use of other fixatives, e.g., formalin and methanol, allows differentiation between the pANCA and the antinuclear antibodies. ANCA specificity is determined by solid phase assays (ELISA, immunodot, and multiplex assay). ANCA with high titres and defined specificities (antiproteinase 3 [PR 3] or antimyeloperoxidase [MPO]) are proven to be good serological markers of active primary systemic vasculitis: c/PR 3-ANCA for Wegener's granulomatosis and p/MPO-ANCA for microscopic polyangiitis. The former have higher sensitivity and specificity for Wegener's granulomatosis than the latter for microscopic polyangiitis. ANCA with low titres and unknown specificity have been detected in a wide range of inflammatory and infectious diseases leading to a critical reappraisal of the diagnostic significance of ANCA testing. Physicians must keep in mind the possible occurrence of infectious diseases like subacute endocarditis that could be dramatically worsened by irrelevant immunosuppressive therapy. ANCA findings in certain manifestations, such as the pulmonary-renal syndrome in which massive pulmonary hemorrhage can quickly be life-threatening, warrant ANCA testing as an emergency test for patient care.
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Affiliation(s)
- C Beauvillain
- Université d'Angers, IFR132, Inserm U564, Angers, France
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27
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Kahan BD. Fokko Johannes van der Woude, 1953-2006. Transplant Proc 2007; 39:321-4. [PMID: 17415942 DOI: 10.1016/j.transproceed.2007.01.073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Lee AS, Finkielman JD, Peikert T, Hummel AM, Viss MA, Jacob GL, Homburger HA, Specks U. Agreement of anti-neutrophil cytoplasmic antibody measurements obtained from serum and plasma. Clin Exp Immunol 2006; 146:15-20. [PMID: 16968393 PMCID: PMC1809725 DOI: 10.1111/j.1365-2249.2006.03179.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Serum and plasma are used interchangeably to measure anti-neutrophil cytoplasmic antibodies (ANCA), even though the release of ANCA target antigens during the preparation of serum could affect ANCA assays and cause discrepancies between the results obtained from serum and plasma. To what extent ANCA test results obtained from serum agree and correlate with results from plasma remains unknown. Therefore, a comprehensive comparison was performed using serum and plasma samples which were collected in 175 patients with active Wegener's granulomatosis at enrollment of a recent randomized trial. These paired serum and plasma samples were subjected to parallel ANCA testing by standard indirect immunofluorescence on ethanol-fixed neutrophils, a direct enzyme-linked immunoassay (ELISA) for proteinase 3 (PR3)-ANCA and myeloperoxidase (MPO)-ANCA, and two different capture ELISAs for PR3-ANCA. The concordance of categorical serum and plasma ANCA results was assessed using kappa-coefficients. These were > 0.8 for all assays, indicating a very good concordance between positive and negative serum and plasma results. Spearman's correlation coefficients for serum and plasma PR3-ANCA values obtained by direct ELISA and both capture ELISAs were > or = 0.95 (P < 0.0001). Our study shows that serum and plasma samples can be used interchangeably for measuring ANCA.
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Affiliation(s)
- A S Lee
- Thoracic Disease Research Unit, Division of Pulmonary and Critical Care Medicine, Mayo Clinic and Foundation, Rochester, MN 55905, USA
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Little MA, Pusey CD. Glomerulonephritis due to antineutrophil cytoplasm antibody-associated vasculitis: an update on approaches to management. Nephrology (Carlton) 2005; 10:368-76. [PMID: 16109084 DOI: 10.1111/j.1440-1797.2005.00434.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
A patient with antineutrophil cytoplasm antibody-associated vasculitis frequently has multisystem disease and might present to a range of medical specialities. The manifestations that result in the greatest burden of morbidity and mortality are renal and pulmonary disease. In this review we will focus on rapidly progressive glomerulonephritis due to vasculitis, with specific reference to recent advances in our understanding of pathogenesis. The current standard of care for managing renal vasculitis, be it mild, moderate or severe, has largely been established in clinical trials of prednisolone, cyclophosphamide, methotrexate, azathioprine and plasma exchange. In addition to these, newer therapies such as mycophenolate mofetil and infliximab are being used more frequently. We will review the role of each of these approaches to management of small vessel vasculitis in 2005.
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Affiliation(s)
- Mark A Little
- Division of Medicine, Imperial College London, Hammersmith Hospital, London, UK
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Sinico RA, Di Toma L, Maggiore U, Bottero P, Radice A, Tosoni C, Grasselli C, Pavone L, Gregorini G, Monti S, Frassi M, Vecchio F, Corace C, Venegoni E, Buzio C. Prevalence and clinical significance of antineutrophil cytoplasmic antibodies in Churg-Strauss syndrome. ACTA ACUST UNITED AC 2005; 52:2926-35. [PMID: 16142760 DOI: 10.1002/art.21250] [Citation(s) in RCA: 395] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
OBJECTIVE Churg-Strauss syndrome (CSS) is classified among the so-called antineutrophil cytoplasmic antibody-associated systemic vasculitides (AASVs) because of its clinicopathologic features that overlap with the other AASVs. However, while antineutrophil cytoplasmic antibodies (ANCAs) are consistently found in 75-95% of patients with Wegener's granulomatosis or microscopic polyangiitis, their prevalence in CSS varies widely and their clinical significance remains uncertain. We undertook this study to examine the prevalence and antigen specificity of ANCAs in a large cohort of patients with CSS. Moreover, we evaluated the relationship between ANCA positivity and clinicopathologic features. METHODS Immunofluorescence and enzyme-linked immunosorbent assay were used to determine the presence or absence of ANCAs in 93 consecutive patients at the time of diagnosis. The main clinical and pathologic data, obtained by retrospective analysis, were correlated with ANCA status. RESULTS ANCAs were present by immunofluorescence in 35 of 93 patients (37.6%). A perinuclear ANCA (pANCA) pattern was found in 26 of 35 patients (74.3%), with specificity for myeloperoxidase (MPO) in 24 patients, while a cytoplasmic ANCA pattern, with specificity for proteinase 3, was found in 3 of 35 patients (8.6%). Atypical patterns were found in 6 of 30 patients with anti-MPO antibodies (20.0%). ANCA positivity was associated with higher prevalences of renal disease (51.4% versus 12.1%; P < 0.001) and pulmonary hemorrhage (20.0% versus 0.0%; P = 0.001) and, to a lesser extent, with other organ system manifestations (purpura and mononeuritis multiplex), but with lower frequencies of lung disease (34.3% versus 60.3%; P = 0.019) and heart disease (5.7% versus 22.4%; P = 0.042). CONCLUSION ANCAs are present in approximately 40% of patients with CSS. A pANCA pattern with specificity for MPO is found in most ANCA-positive patients. ANCA positivity is mainly associated with glomerular and alveolar capillaritis.
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Affiliation(s)
- Renato A Sinico
- Dipartimento di Nefrologia e Immunologia, Azienda Ospedaliera Ospedale San Carlo Borromeo, Milan, Italy.
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Badakere SS, Pradhan VD, Almeida AF, Pawar AR. Use of immunofluorescence and confocal laser scanning microscopy in identifying rare cases of anti-neutrophil cytoplasmic antibodies (ANCA) showing dual specificities to myeloperoxidase and proteinase3. J Fluoresc 2005; 14:459-63. [PMID: 15617388 DOI: 10.1023/b:jofl.0000031827.75873.a4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Anti-neutrophil cytoplasmic antibodies (ANCA) are the immunodiagnostic markers for idiopathic necrotizing crescentic glomerulonephritis affecting mainly medium to small sized blood vessels. The diagnosis of ANCA associated vasculitis (AAV) is mainly based on clinical and histopathological characteristics along with the serological evidence. Immunofluorescence microscopy (IIF) is considered as the "gold standard" for ANCA detection, and ANCA showing two major patterns ie, cytoplasmic (c-ANCA) and perinuclear (p-ANCA) react with different antigenic targets of neutrophils like Proteinase3 (PR3) and Myeloperoxidase (MPO). A third unusual and rare immunofluorescence pattern called as "X- ANCA" or atypical ANCA is also sometimes seen. The difficulty in identification of ANCA immunofluorescence patterns is mainly seen due to the rare dual patterns seen in the same sera and also the additional nuclear immunofluorescence seen due to presence of anti-nuclear antibodies. ANCA testing by immunofluorescence and Confocal Laser scanning microscopy, as well as by specific ELISAs for detection of anti-PR3 and anti-MPO antibodies have helped in improving the diagnosis. Patients having dual specificities to MPO and PR3 in a patient is a rare finding. Among 425 clinically and histopathologically proven cases of AAV, eight patients (1.9%) had dual specificities, of which five patients showed mixed immunofluorescence pattern and 3 patients showed X-ANCA pattern which was confirmed by both immunofluorescence and Confocal Laser scanning microscopy and the dual specificities to MPO and PR3 were detected by individual ELISAs.
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Affiliation(s)
- S S Badakere
- Department of Autoimmune disorders, Institute of Immunohaematology, Indian Council of Medical Research, King Edward Memorial Hospital, 13th floor, Parel, Mumbai 400 012, India.
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Abstract
BACKGROUND Wegener's granulomatosis (WG), Churg Strauss syndrome (CSS) and microscopic polyangiitis (MPA) are primary systemic vasculitides (PSV), the clinical features of which have been described from tertiary centres. AIM To provide the first clinical description of MPA from a general hospital and compare clinical features with WG and CSS. DESIGN Retrospective analysis of patient records. METHODS Records of 99 PSV patients attending a single hospital, from 1988 to 2000, were reviewed for: clinical features, date/age at diagnosis, sex, duration of illness, anti-neutrophil cytoplasmic antibodies (ANCA), treatment, comorbidity and deaths. Cases were classified using ACR, CHCC and Lanham criteria/definitions. Birmingham vasculitis activity scores (BVAS) and damage index (VDI) were calculated. Survival was assessed using Cox proportional hazards model and standardized mortality ratios (SMRs). RESULTS Compared to previous reports there was more ENT (29%) and respiratory (29%) but less renal (92%) involvement in MPA, and less ENT involvement in WG (81%). CSS showed high neurological (72%), cardiovascular (28%) and gastrointestinal (17%) involvement and the highest median (range) VDI (p = 0.01 vs. WG; p = 0.001 vs. MPA). BVAS1 was significantly lower in MPA than in WG [median (range) 15 (4-29) vs. 21 (6-39), (p = 0.001)] but not in CSS [20 (7-28), p = 0.08]. SMR (95%CI) for PSV was 4.8 (3.0-6.6); 5-year survival was 45.1% for MPA, 75.9% for WG and 68.1% for CSS. Age was a significant risk, but only to the same extent as in the reference population. When age was adjusted for, no other significant factor was found. DISCUSSION The clinical characteristics seen here are similar to those in previous series. There are difficulties in using the MPA CHCC definitions in classification. There is a high proportion of neurological involvement in CSS, causing permanent damage. MPA may have a poorer prognosis than WG or CSS.
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Affiliation(s)
- S E Lane
- Department of Rheumatology, Ipswich Hospital, Heath Rd, Ipswich IP4 5PD, UK.
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Danieli MG, Cappelli M, Malcangi G, Logullo F, Salvi A, Danieli G. Long term effectiveness of intravenous immunoglobulin in Churg-Strauss syndrome. Ann Rheum Dis 2004; 63:1649-54. [PMID: 15547090 PMCID: PMC1754837 DOI: 10.1136/ard.2003.015453] [Citation(s) in RCA: 78] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
OBJECTIVE To study the long term effectiveness of intravenous immunoglobulin and plasmapheresis associated with prednisone and cyclophosphamide in Churg-Strauss syndrome. SUBJECTS and methods: We studied 18 subjects with new onset Churg-Strauss syndrome. All received the "standard" treatment based on prednisone (1 mg/kg/day for 1 month and then slowly tapered) and cyclophosphamide (2 mg/kg/day for 6 months in severe cases). In nine patients, synchronised cycles with plasmapheresis and intravenous immunoglobulin (2 g/kg) were repeated monthly for 6 months and every other month for a further three cycles. Clinical (disease activity monitored by Birmingham vasculitis activity score (BVAS) and damage index (modified Rankin score)) and functional (C reactive protein, blood eosinophil count, and electromyogram-electoneurogram) parameters were collected during treatment and the 3 year follow up period. RESULTS After 12 months, all patients in the treatment group and four (44%) in the control group were in remission. At the end of the 3 year follow up period, we documented significant differences in BVAS (p<0.01), global damage (p<0.02), modified Rankin score (p<0.04), and the daily maintenance prednisone dose (p<0.002) between the two groups. We found a tendency towards lower frequency of relapse and incidence of osteoporosis in the treatment group. CONCLUSION Complete clinical and functional recovery with a long term stable remission and a low incidence of side effects can be achieved by intravenous immunoglobulin associated with plasmapheresis in patients with Churg-Strauss syndrome.
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Affiliation(s)
- M G Danieli
- Istituto Clinica Medica Generale, Ematologia ed Immunologia Clinica, Polo Didattico Scientifico, Via Tronto 20, 60020, Torrette di Ancona, Italy.
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Teixeira L, Mahr A, Jaureguy F, Noël LH, Nunes H, Lefort A, Barry S, Deny P, Guillevin L. Low seroprevalence and poor specificity of antineutrophil cytoplasmic antibodies in tuberculosis. Rheumatology (Oxford) 2004; 44:247-50. [PMID: 15546964 DOI: 10.1093/rheumatology/keh467] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVES Recently published findings suggested that antineutrophil cytoplasmic antibodies (ANCA), particularly those with a cytoplasmic (C-ANCA) labelling pattern and targeting proteinase 3 (anti-PR3), might be markers of tuberculosis (TB). This is a critical issue, because C-ANCA/anti-PR3 were considered to be a highly specific hallmark of Wegener's granulomatosis or microscopic polyangiitis and because TB may clinically mimic Wegener's granulomatosis. We therefore undertook a study with the aim of investigating further the prevalence and specificity of ANCA in TB. METHODS We evaluated serum samples from 67 patients diagnosed with culture-proven TB and 10 previously untested control samples from patients known to be ANCA positive (four Wegener's granulomatosis and two microscopic polyangiitides) or negative. All 77 sera were screened for ANCA using commercially available indirect immunofluorescence (IIF) and enzyme-linked immunosorbent assay (ELISA) for anti-PR3 and antimyeloperoxidase (MPO). IIF-positive and anti-PR3- and anti-MPO-negative sera were also tested for bactericidal/permeability-increasing protein, lactoferrin, elastase and cathepsin G specificities with commercially available ELISA. RESULTS IIF detected ANCA in seven (10%) of the TB sera, including three C-ANCA and four atypical perinuclear-labelling ANCA. Only one IIF-negative specimen was anti-PR3 positive in ELISA. ANCA testing of the control sera yielded IIF and ELISA results concordant with previous findings, except for one borderline ELISA. CONCLUSION Our results indicate that TB is associated with low ANCA seroprevalence and poor specificity, with no test serum showing combined C-ANCA/anti-PR3 activity. In a clinical setting of Wegener's granulomatosis/TB mimicry, such combined reactivity would seem to be more suggestive of Wegener's granulomatosis.
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Affiliation(s)
- L Teixeira
- Department of Internal Medicine, Unité de Recherche Clinique et Thérapeutique, Hôpital Cochin, 27, rue du Faubourg Saint-Jacques, 75679 Paris Cedex 14, France
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Schinke S, Fellermann K, Herlyn K, Reichel PH, Fundke R, Stange EF, Gross WL, Schultz H. Autoantibodies against the bactericidal/permeability-increasing protein from inflammatory bowel disease patients can impair the antibiotic activity of bactericidal/permeability-increasing protein. Inflamm Bowel Dis 2004; 10:763-70. [PMID: 15626895 DOI: 10.1097/00054725-200411000-00011] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Bactericidal/permeability-increasing protein (BPI) is an antineutrophil cytoplasmic autoantibody (ANCA) target antigen in inflammatory bowel disease (IBD). The aim of this study was to characterize binding regions of BPI-autoantibodies and to analyze their ability to block the antibiotic effect of BPI. Sera of 24 ulcerative colitis and Crohn's disease patients were examined in indirect immuno-fluorescence, ANCA enzyme-linked immunosorbent assay (ELISA), and by epitope mapping with 13mer peptides and Western blot for presence of BPI-autoantibodies. IgG preparations were used to determine inhibition of BPI's antimicrobial function by BPI-autoantibodies in a bacterial growth inhibition assay. BPI-autoantibodies were detected by ELISA in 18/24 patients. Epitope mapping and western blotting revealed an additional 3 patients with BPI-autoantibodies. IgG preparations of all patients with Crohn's disease and 9 of 12 ulcerative colitis patients could inhibit the antibiotic function of BPI in vitro as compared with healthy control subjects. Inhibiting BPI-autoantibodies correlated with extraintestinal manifestations, peripheral blood leukocyte counts, and anemia. BPI-autoantibodies recognizing the N-terminal portion were associated with greater mucosal damage and intestinal extent of disease. BPI is a frequent target antigen of autoantibodies in ulcerative colitis and Crohn's disease. Inhibition of the antibiotic function mediated by the N-terminal region of BPI by these autoantibodies may contribute to a proinflammatory environment in IBD patients.
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Affiliation(s)
- Susanne Schinke
- Department of Rheumatology, University of Luebeck, Bad Bramstedt, Germany
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Beimler JHM, Andrassy K. Cyclophosphamide treatment in systemic necrotizing vasculitis and lupus nephritis. How long? How much? Pediatr Nephrol 2004; 19:949-55. [PMID: 15257454 DOI: 10.1007/s00467-004-1553-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2004] [Revised: 05/12/2004] [Accepted: 05/12/2004] [Indexed: 10/26/2022]
Abstract
The gold standard for inducing remission in systemic necrotizing vasculitis (SNV) and severe lupus nephritis is (and remains) the combination of cyclophosphamide and glucocorticoids. Long-term treatment with cyclophosphamide is limited because of toxicity. Recent prospective studies in antineutrophil cytoplasmic antibody (ANCA)-associated SNV revealed that after achievement of clinical remission (usually within 3-4 months after starting cyclophosphamide) cyclophosphamide can be replaced by azathioprine with no increase in relapse rates if treatment is continued for at least 1 year. Methotrexate is inferior to cyclophosphamide because of increased relapse rates-particularly in those with renal involvement-during follow-up. An ongoing study comparing mycophenolate mofetil (MMF) with azathioprine will clarify whether MMF is as successful as azathioprine or even better. The concomitant use of tumor necrosis factor (TNF)-alpha blockers increases the efficacy of immunosuppression. TNF-alpha blockers may be added if SNV is refractory to standard immunosuppressive therapy. However, with this addition to therapy, systemic infections are more frequent. In patients with severe lupus nephritis (WHO IV) the efficacy of combined i.v. therapy with cyclophosphamide and glucocorticoids was shown by NIH trials. This NIH regimen competes with the EURO-Lupus nephritis schedule with a lower dose of i.v. cyclophosphamide followed by maintenance therapy with azathioprine. Long-term follow-up is, however, still lacking in the EURO-Lupus trial. Ongoing prospective studies will reveal whether cyclophosphamide may be substituted by MMF from the very beginning or whether MMF is superior to azathioprine during maintenance therapy of lupus nephritis.
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Affiliation(s)
- J H M Beimler
- Division of Nephrology, Department of Medicine, University Hospital Heidelberg, Bergheimerstrasse 56a, 69115 Heidelberg, Germany,
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Joossens S, Daperno M, Shums Z, Van Steen K, Goeken JA, Trapani C, Norman GL, Godefridis G, Claessens G, Pera A, Pierik M, Vermeire S, Rutgeerts P, Bossuyt X. Interassay and interobserver variability in the detection of anti-neutrophil cytoplasmic antibodies in patients with ulcerative colitis. Clin Chem 2004; 50:1422-5. [PMID: 15277351 DOI: 10.1373/clinchem.2004.032318] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Sofie Joossens
- Department of Gastroenterology, University Hospital Gasthuisberg, KULeuven, Leuven, Belgium
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Abstract
PURPOSE OF REVIEW Antineutrophil cytoplasmic antibodies are closely associated with Wegener granulomatosis, microscopic polyangiitis, and Churg-Strauss syndrome and have contributed to new pathogenetic concepts and improved nomenclature of systemic vasculitides (antineutrophil cytoplasmic antibody-associated vasculitides). However, the application of antineutrophil cytoplasmic antibody testing as a clinical diagnostic tool is still regarded as controversial. This review summarizes the most recent developments in the field, identifies areas of uncertainty, and gives practical guidelines. RECENT FINDINGS The problems of antineutrophil cytoplasmic antibody testing include the diversity of antineutrophil cytoplasmic antibody target antigens, assay standardization and performance, the application of antineutrophil cytoplasmic antibody testing in a clinical setting with a low pretest probability, and, finally, the widespread assumption that antineutrophil cytoplasmic antibody titers alone may closely reflect disease activity and therefore may be used to guide therapy. SUMMARY Recent findings demonstrate that the combined use of indirect immunofluorescence tests and solid phase assays to detect antineutrophil cytoplasmic antibody directed against myeloperoxidase and proteinase 3 can minimize the occurrence of false-positive antineutrophil cytoplasmic antibody results. Furthermore, the yield of antineutrophil cytoplasmic antibody testing can be improved by the use of a well-standardized test, adherence to published guidelines, and restricting the use of the tests to clinical situations with a rather high pretest probability for antineutrophil cytoplasmic antibody-associated vasculitides. However, treatment decisions should be based on the clinical presentation of the patient and histologic findings and not on the results of antineutrophil cytoplasmic antibody testing alone.
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Affiliation(s)
- Wilhelm H Schmitt
- Vth Medical Clinic (Nephrology, Endocrinolgy, Rheumatolgy), University-Clinic Mannheim, Faculty of Clinical Medicine of the University of Heidelberg, Mannheim, Germany.
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Trevisin M, Neeson P, Savige J. The binding of proteinase 3 antineutrophil cytoplasmic antibodies (PR3-ANCA) varies in different ELISAs. J Clin Pathol 2004; 57:303-8. [PMID: 14990605 PMCID: PMC1770226 DOI: 10.1136/jcp.2003.009332] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND The demonstration of proteinase 3 specific antineutrophil cytoplasmic antibodies (PR3-ANCA), and the estimation of antibody values are useful in the diagnosis and management of patients with Wegener's granulomatosis (WG). However, external quality assessment programmes suggest that PR3-ANCA binding varies in different assays. AIM To demonstrate variations in PR3-ANCA binding in different commercial and in house enzyme linked immunosorbent assays (ELISAs). METHOD Binding of a PR3-ANCA standard and 19 sera from patients with WG was compared in eight commercial and in house assays. Binding was expressed in different units depending on the kit. RESULTS One commercial assay performed unsatisfactorily. Three commercial kits produced PR3-ANCA binding (70, 102, and 84 U/ml) close to the expected value for the standard (100 U/ml). Serial dilutions of this standard were linear in only one commercial assay and the in house assay. Sera from patients with WG with borderline binding in the in house assay bound in the eight commercial kits at 0-148 kit units; low binding sera ranged from 0 to 273 units; moderately strong sera bound at 7-260 units; and strongly binding sera bound at 13-336 units. In four assays, at least one strongly positive serum bound at levels greater than the provided range. CONCLUSIONS Levels of antibody binding and units of binding have not been standardised in commercially available PR3-ANCA ELISAs. This may affect the diagnosis and management of patients with WG, in addition to the implementation of international guidelines for treatment.
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Affiliation(s)
- M Trevisin
- Immunology Unit, Division of Laboratory Medicine, Austin Hospital, Heidelberg, Victoria 3084, Australia
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Stone JH, Talor M, Stebbing J, Uhlfelder ML, Rose NR, Carson KA, Hellmann DB, Burek CL. Test characteristics of immunofluorescence and ELISA tests in 856 consecutive patients with possible ANCA-associated conditions. ACTA ACUST UNITED AC 2003; 13:424-34. [PMID: 14635320 DOI: 10.1002/1529-0131(200012)13:6<424::aid-art14>3.0.co;2-q] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE To examine the test characteristics of immunofluorescence (IF) and enzyme-linked immunosorbent assays (ELISA) in a consecutive series of patients under evaluation for anti-neutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV). METHODS Using stored sera, we performed a cross-sectional study on 856 consecutive patients tested prospectively for ANCA by IF, Based on guidelines from the 1994 Chapel Hill Consensus Conference (CHCC), we determined each patient's underlying diagnosis by a medical records review without regard to their ANCA status (the CHCC guidelines do not require ANCA as a prerequisite for diagnosis). We grouped patients with forms of vasculitis commonly associated with ANCA into one of 4 types of AAV: Wegener's granulomatosis (n = 45), microscopic polyangiitis (n = 12), Churg-Strauss syndrome (n = 4), and pauci-immune glomerulonephritis (n = 8). We also classified patients without clinical evidence of AAV (92% of all patients tested) into 5 predefined categories of disease (including "other") and an additional category for no identifiable disease. In a blinded fashion, we then performed ELISAs on the stored serum for antibodies to proteinase-3 (PR3) and myeloperoxidase (MPO) and calculated the test characteristics for both ANCA assay techniques. RESULTS Sixty-nine of the 856 patients (8.1%) had clinical diagnoses of AAV based on CHCC guidelines. The positive predictive value (PPV) of ELISA for AAV was superior to that of IF, 83% versus 45%. For patients with both positive IF tests and positive ELISA tests, the PPV increased to 88%. Both IF and ELISA had high negative predictive values (97% and 96%, respectively). Positive ELISA tests were associated with higher likelihood ratios (LR) than IF (54.2 [95% CI = 26.3, 111.5] versus 9.4 [95% CI = 6.9, 12.7]). The LR of both a positive IF and a positive ELISA was 82.1 (95% CI = 33.3, 202.5). CONCLUSIONS Compared with IF, an ELISA test fo ANCA was associated with a substantially higher PPV and LR for AAV. This fact, combined with the greater sensitivity of IF, suggests that an effective testing strategy is to perform ELISA tests only on samples that are positive for ANCA by IF.
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Affiliation(s)
- J H Stone
- Department of Medicine, Johns Hopkins University Vasculitis Center, 1830 E. Monument Street, Suite 7500, Baltimore, MD 21205, USA
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Jayne D. Current Attitudes to the Therapy of Vasculitis. Kidney Blood Press Res 2003; 26:231-9. [PMID: 14504423 DOI: 10.1159/000072990] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/24/2003] [Indexed: 11/19/2022] Open
Affiliation(s)
- David Jayne
- Vasculitis and Lupus Clinic, Addenbrooke's Hospital, Cambridge, UK.
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Hauer HA, Hagen EC, de Heer E, Bruijn JA, Bajema IM. Glomerulonephritis in the vasculitides: advances in immunopathology. Curr Opin Rheumatol 2003; 15:17-21. [PMID: 12496505 DOI: 10.1097/00002281-200301000-00004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Systemic vasculitis refers to a condition of blood vessel inflammation, of which the causes are various. In a substantial number of cases, autoantibodies against neutrophil cytoplasm constituents (ANCAs) are present. The authors then refer to the systemic vasculitis as ANCA-associated systemic vasculitis. Renal disease is an unfavorable component, leading to dialysis dependency in a considerable number of patients. This review aims to summarize in brief what was reported about ANCA-associated vasculitis in the recent past. What the exact pathogenic role of ANCAs in the development of systemic vasculitis is remains uncertain, and it is still not clear how their presence leads to the histopathologic lesions called vasculitis.
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Affiliation(s)
- Herbert A Hauer
- Department of Pathology, Leiden University Medical Center, Leiden, The Netherlands
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Van der Geld YM, Smook MLF, Huitema MG, Harmsen MC, Limburg PC, Kallenberg CGM. Expression of recombinant proteinase 3, the autoantigen in Wegener's granulomatosis, in insect cells. J Immunol Methods 2002; 264:195-205. [PMID: 12191522 DOI: 10.1016/s0022-1759(02)00101-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Proteinase 3 (PR3) is the major autoantigen for anti-neutrophil cytoplasmic antibodies (ANCA) in patients with Wegener's granulomatosis. Little is known about the major antigenic sites on PR3. To facilitate epitope mapping, PR3 was cloned in insect cells using a baculovirus expression system. Four different sequences of the PR3 cDNA were amplified by PCR: two clones containing the pro-peptide of PR3 with or without a His-tag (rproPR3-his and rproPR3, respectively) and two clones without the pro-peptide and with or without a His-tag (rPR3-his and rPR3, respectively). The PR3 sequences were cloned behind the polyhedrin promoter and the honeybee melittin signal peptide enabling secretion of rPR3. Plasmids were transposed into the genome of baculovirus, and wild types as well as PR3-containing virus genomes were transfected into Sf21 insect cells. All four rPR3 variants were secreted into the medium and were recognized by anti-neutrophil PR3 rabbit serum and by at least two anti-PR3 monoclonal antibodies. Mature forms of PR3 were recognized by almost all patient sera, whereas the pro-forms of PR3 were recognized by 14 of 18 PR3-ANCA sera tested. On SDS-PAGE, the four rPR3 forms migrated at approximately 32 kDa. RPR3-his and rproPR3-his could be purified by means of this His-tag. In conclusion, especially the mature rPR3s are well recognized by PR3-ANCA sera. The presence of a C-terminal His-tag facilitated purification of His-tagged rPR3. Thus, rPR3 expressed in insect cells can be used as a tool for diagnostic tests as well as for epitope mapping studies.
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Affiliation(s)
- Y M Van der Geld
- Department of Internal Medicine, University Hospital Groningen, Groningen, The Netherlands
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Wiik AS. Clinical use of serological tests for antineutrophil cytoplasmic antibodies. What do the studies say? Rheum Dis Clin North Am 2001; 27:799-813, vi-vii. [PMID: 11723765 DOI: 10.1016/s0889-857x(05)70236-2] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Trustworthy and clinically useful laboratory test results depend on high quality laboratory knowledge and performance and on close collaboration with experienced clinicians. Just like a diagnosis can only be made by contrasting it to a number of differential diagnoses, a prototype autoantibody profile can only be recognized if autoantibodies that partially mimic the former are just as well-known. In antineutrophil cytoplasmic antibody (ANCA)-associated small vessel vasculitides the characteristic autoantibody profile can only be demonstrated by use of at least two different methodologies and an assay-specific cut-off selection that clearly distinguishes between strongly positive and disease control low positive to negative values. Local serum banks containing samples from patients with well-characterized chronic immunoinflammatory diseases and ANCA-associated vasculitides are needed for such important studies whether in-house or commercial assays are used.
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Affiliation(s)
- A S Wiik
- Department of Autoimmunology, Statens Serum Institut, Copenhagen, Denmark.
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Sandborn WJ, Loftus EV, Colombel JF, Fleming KA, Seibold F, Homburger HA, Sendid B, Chapman RW, Tremaine WJ, Kaul DK, Wallace J, Harmsen WS, Zinsmeister AR, Targan SR. Evaluation of serologic disease markers in a population-based cohort of patients with ulcerative colitis and Crohn's disease. Inflamm Bowel Dis 2001; 7:192-201. [PMID: 11515844 DOI: 10.1097/00054725-200108000-00003] [Citation(s) in RCA: 118] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
BACKGROUND The sensitivity of assays for antineutrophil cytoplasmic antibody (ANCA), anti-Saccharomyces cerevisiae antibody (ASCA), and antipancreatic antibody (PAB) in different laboratories is unknown. Likewise, the sensitivity and diagnostic usefulness of these assays in patients with inflammatory bowel disease (IBD) in the community is unknown. METHODS An incidence cohort of 290 patients with IBD were offered participation in the study. Blood was obtained from 162 patients (56%) (83 with ulcerative colitis, 79 with Crohn's disease) who agreed to participate. ANCA was determined in five laboratories. ASCA in two laboratories, and PAB in one laboratory. RESULTS In ulcerative colitis, the sensitivity of ANCA determined in five laboratories varied widely, ranging from 0-63%. In Crohn's disease, the sensitivity of ASCA determined in two laboratories did not vary significantly, ranging from 39-44%; and the sensitivity of PAB determined in one laboratory was 15%. The optimal diagnostic usefulness was obtained from one laboratory where the positive predictive values of a positive ANCA assay combined with a negative ASCA assay for ulcerative colitis, and a negative ANCA combined with a positive ASCA for Crohn's disease, were 75% and 86%, respectively. CONCLUSIONS In patients with IBD, the sensitivity of ANCA varied widely in different laboratories, whereas the prevalence of ASCA was similar. The positive predictive values of the ANCA assay combined with the ASCA assay for ulcerative colitis and Crohn's disease are high enough to be clinically useful.
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Abstract
Vasculitis is a process that results from the inflammation of blood vessels and can occur de novo or secondary to a variety of diseases or drugs. Clinical presentation depends on the size and distribution of vessels involved. Anti-neutrophil cytoplasmic antibodies (ANCA) have been shown to have variable sensitivity in making the diagnosis of specific vasculitic syndromes, therefore histological confirmation may be necessary. Angiography is a useful tool in evaluating disease of large and medium-sized vessels that are inaccessible or potentially dangerous to biopsy. New imaging modalities are becoming more useful in diagnosing vessel wall changes, particularly in large-vessel vasculitides. In clinical practice it is not always possible to classify or apply a specific label to a patient with vasculitis, but for appropriate patient management it is important to define the extent and severity of disease and to exclude underlying secondary causes.
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Affiliation(s)
- N Mohan
- Division of Rheumatology, Allergy and Immunology, Georgetown University Medical Center, 3800 Reservoir Road NW, Washington, DC 20007, USA
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D'Amico G, Napodano P, Ferrario F, Rastaldi MP, Arrigo G. Idiopathic IgA nephropathy with segmental necrotizing lesions of the capillary wall. Kidney Int 2001; 59:682-92. [PMID: 11168950 DOI: 10.1046/j.1523-1755.2001.059002682.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND Segmental glomerular necrosis has been described in the biopsy material in a minority of patients with idiopathic IgA nephropathy in the oldest studies on this disease, but this marker of active capillaritis has received little attention in the subsequent literature, and its significance and relevance for the clinical outcome is still unknown. METHODS Thirty-five out of 340 patients (10.3%) biopsied in our division at the San Carlo Hospital since 1974 showed active segmental necrotizing lesions. The morphological features and the natural history of this group of patients were compared with those of a control group of 229 patients who had comparable serum creatinine and extent of glomerular sclerosis, but who lacked active segmental necrosis. RESULTS Patients with the necrotic variant showed a significantly more marked extracapillary proliferation and interstitial accumulation of monocytes and T lymphocytes and, in the segmental areas of necrotizing and extracapillary lesions, infiltration of monocytes, deposition of fibrinogen, and expression of the adhesion molecule vascular cell adhesion molecule-1. No difference was found in the presenting clinical syndrome. The clinical course was frequently characterized by acute flare ups, and the progression to end-stage renal failure was more frequent, although actuarial renal survival was not significantly worse (P = 0.07). The aggressive treatment with steroids and cyclophosphamide, carried out in 20 of the 35 patients, has probably been beneficial, justifying the multicenter controlled trial that recently has been initiated. CONCLUSIONS Vasculitic lesions of the glomerular capillaries, with histologic and immunohistological features similar to those of Henoch-Schönlein purpura and antineutrophil cytoplasmic antibody-positive renal vasculitis, were found in 10% of patients with idiopathic IgAN. Clinical features at presentation did not differ from those of the other patients with IgAN, and despite of the more frequent occurrences of recurrent acute flare ups, rapid progression to end-stage renal failure was a rare phenomenon, even in untreated patients.
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Affiliation(s)
- G D'Amico
- Division of Nephrology, San Carlo Borromeo Hospital, Milan, Italy.
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Jayne D. Clinical management and treatment of vasculitis. SPRINGER SEMINARS IN IMMUNOPATHOLOGY 2001; 23:267-86. [PMID: 11591102 DOI: 10.1007/s002810100080] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- D Jayne
- Box 157, Department of Medicine, Addenbrooke's Hospital, Cambridge CB1 2SP, UK
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