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Kilinc OC, Ugurlu S. Clinical features of dermatomyositis patients with anti-TIF1 antibodies: A case based comprehensive review. Autoimmun Rev 2023; 22:103464. [PMID: 37863375 DOI: 10.1016/j.autrev.2023.103464] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Accepted: 10/13/2023] [Indexed: 10/22/2023]
Abstract
BACKGROUND AND OBJECTIVES Dermatomyositis is chronic autoimmune disease primarily affecting skin and muscles. Antibodies are key players of pathogenesis and are in strong correlation with distinct clinical phenotypes. We present a case and a comprehensive review of the literature on dermatomyositis patients with Anti TIF1 antibodies. METHODS PubMed and Web of Science databases were reviewed. 166 articles were identified; 95 of them were evaluated; 79 of them included to the study. 45 of the included articles were case reports 9 were case series and 25 were research articles. In total 1065 patients were identified but number of patients with available information for different clinical features varied. RESULTS 69.6% of the patients with Anti TIF1-γ were female. Prevalence of malignancy was 42.6% among patients with Anti TIF1-γ. Muscle weakness (83%), Gottron sign (82.2%), heliotrope rash (73.7%), nailfold capillary changes (67.7%), dysphagia (38.4%), and joint involvement (31.1%) were the most common clinical features seen in patients with Anti TIF1-γ. Interstitial lung disease (ILD) was reported among 8.7% of patients with Anti TIF1-γ. Advanced age, male gender, dysphagia, and V-neck rash were significant risk factors for malignancy, whereas juvenile age, ILD, TIF1-β antibodies and joint involvement were associated with a decreased risk for malignancy. Advanced age, malignancy, dysphagia, and muscle involvement were associated with an increased risk for mortality. CONCLUSIONS Patients with advanced age, male gender, dysphagia, and V-neck rash require strict cancer screening. Patients with advanced age, malignancy, dysphagia, and muscle involvement have poor prognosis and should receive aggressive treatment.
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Affiliation(s)
- Ozgur C Kilinc
- Division of Rheumatology, Department of Internal Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Serdal Ugurlu
- Division of Rheumatology, Department of Internal Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey.
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2
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Esposito I, Kontra I, Giacomassi C, Manou-Stathopoulou S, Brown J, Stratton R, Verykokou G, Buccafusca R, Stevens M, Nissim A, Lewis MJ, Pfeffer PE. Identification of autoantigens and their potential post-translational modification in EGPA and severe eosinophilic asthma. Front Immunol 2023; 14:1164941. [PMID: 37334358 PMCID: PMC10272393 DOI: 10.3389/fimmu.2023.1164941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Accepted: 05/18/2023] [Indexed: 06/20/2023] Open
Abstract
Background The chronic airway inflammation in severe eosinophilic asthma (SEA) suggests potential autoimmune aetiology with unidentified autoantibodies analogous to myeloperoxidase (MPO) in ANCA-positive EGPA (eosinophilic granulomatosis with polyangiitis). Previous research has shown that oxidative post-translational modification (oxPTM) of proteins is an important mechanism by which autoantibody responses may escape immune tolerance. Autoantibodies to oxPTM autoantigens in SEA have not previously been studied. Methods Patients with EGPA and SEA were recruited as well as healthy control participants. Autoantigen agnostic approach: Participant serum was incubated with slides of unstimulated and PMA-stimulated neutrophils and eosinophils, and autoantibodies to granulocytes were identified by immunofluorescence with anti-human IgG FITC antibody. Target autoantigen approach: Candidate proteins were identified from previous literature and FANTOM5 gene set analysis for eosinophil expressed proteins. Serum IgG autoantibodies to these proteins, in native and oxPTM form, were detected by indirect ELISA. Results Immunofluorescence studies showed that serum from patients with known ANCA stained for IgG against neutrophils as expected. In addition, serum from 9 of 17 tested SEA patients stained for IgG to PMA-stimulated neutrophils undergoing NETosis. Immunofluorescent staining of eosinophil slides was evident with serum from all participants (healthy and with eosinophilic disease) with diffuse cytoplasmic staining except for one SEA individual in whom subtle nuclear staining was evident. FANTOM5 gene set analysis identified TREM1 (triggering receptor expressed on myeloid cells 1) and IL-1 receptor 2 (IL1R2) as eosinophil-specific targets to test for autoantibody responses in addition to MPO, eosinophil peroxidase (EPX), and Collagen-V identified from previous literature. Indirect ELISAs found high concentrations of serum autoantibodies to Collagen-V, MPO, and TREM1 in a higher proportion of SEA patients than healthy controls. High concentrations of serum autoantibodies to EPX were evident in serum from both healthy and SEA participants. The proportion of patients with positive autoantibody ELISAs was not increased when examining oxPTM compared to native proteins. Discussion Although none of the target proteins studied showed high sensitivity for SEA, the high proportion of patients positive for at least one serum autoantibody shows the potential of more research on autoantibody serology to improve diagnostic testing for severe asthma. Clinical trial registration ClinicalTrials.gov, identifier, NCT04671446.
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Affiliation(s)
- Ilaria Esposito
- William Harvey Research Institute, Queen Mary University of London, London, United Kingdom
| | - Ioanna Kontra
- William Harvey Research Institute, Queen Mary University of London, London, United Kingdom
| | - Chiara Giacomassi
- William Harvey Research Institute, Queen Mary University of London, London, United Kingdom
- Department of Rheumatology, Royal Free NHS Foundation Trust, London, United Kingdom
| | | | - James Brown
- Department of Respiratory Medicine, Royal Free NHS Foundation Trust, London, United Kingdom
| | - Richard Stratton
- Department of Rheumatology, Royal Free NHS Foundation Trust, London, United Kingdom
- Centre for Rheumatology, University College London, London, United Kingdom
| | - Galateia Verykokou
- Department of Respiratory Medicine, Barts Health NHS Trust, London, United Kingdom
| | - Roberto Buccafusca
- School of Physical and Chemical Sciences, Queen Mary University of London, London, United Kingdom
| | - Michael Stevens
- Department of Clinical Immunology, Barts Health NHS Trust, London, United Kingdom
- Department of Clinical Immunology, University Hospitals Sussex NHS Foundation Trust, Brighton, United Kingdom
| | - Ahuva Nissim
- William Harvey Research Institute, Queen Mary University of London, London, United Kingdom
| | - Myles J. Lewis
- William Harvey Research Institute, Queen Mary University of London, London, United Kingdom
| | - Paul E. Pfeffer
- William Harvey Research Institute, Queen Mary University of London, London, United Kingdom
- Department of Respiratory Medicine, Barts Health NHS Trust, London, United Kingdom
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3
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E B, F F, G P, Y R, C B. Myositis-specific autoantibodies in clinical practice: improving the performance of the immunodot. Semin Arthritis Rheum 2022; 55:151998. [DOI: 10.1016/j.semarthrit.2022.151998] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2022] [Revised: 02/14/2022] [Accepted: 03/20/2022] [Indexed: 01/08/2023]
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4
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Mahler M, Malyavantham K, Seaman A, Bentow C, Anunciacion-Llunell A, Sanz-Martínez MT, Viñas-Gimenez L, Selva-O’Callaghan A. Profiling of Myositis Specific Antibodies and Composite Scores as an Aid in the Differential Diagnosis of Autoimmune Myopathies. Diagnostics (Basel) 2021; 11:diagnostics11122246. [PMID: 34943483 PMCID: PMC8699835 DOI: 10.3390/diagnostics11122246] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 11/18/2021] [Accepted: 11/24/2021] [Indexed: 01/25/2023] Open
Abstract
(1) Background: Myositis specific antibodies (MSA) represent important diagnostic and stratification tools in idiopathic inflammatory myositis (IIM) patients. Here we aimed to evaluate the clinical performance of MSA profiled by a novel particle based multi-analyte technology (PMAT) in IIM and subsets thereof. (2) Methods: 264 IIM patients and 200 controls were tested for MSA using PMAT (Inova Diagnostics, research use only). Diagnostic performance was analyzed and composite scores were generated. (3) Results: The sensitivity/specificity of the individual MSA were: 19.7%/100% (Jo-1), 7.2%/100.0% (Mi-2), 3.0%/99.0% (NXP2), 3.8%/100.0% (SAE), 2.7%/100.0% (PL-7), 1.9%/99.5 (PL-12), 1.1%/100.0% (EJ), 15.5%/99.5% (TIF1γ), 8.3%/98.5% (MDA5), 6.1%/99.0% (HMGCR) and 1.9%/98.5% (SRP). Of all IIM patients, 180/264 tested positive for at least one of the MSAs. In the individual control group, 12/200 (6.0%) tested positive for at least one MSA, most of which had levels close to the cut-off (except one SRP and one PL-12). Only 6/264 (2.3%) IIM patients were positive for more than one antibody (MDA5/HMGCR, EJ/PL-7, 2 x MDA5/TIF1γ, EJ/SAE, SAE/TIF1γ). The overall sensitivity was 68.2% paired with a specificity of 94.0%, leading to an odds ratio of 33.8. The composite scores showed good discrimination between subgroups (e.g., anti-synthetase syndrome). (4) Conclusion: MSA, especially when combined in composite scores (here measured by PMAT), provide value in stratification of patients with IIM.
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Affiliation(s)
- Michael Mahler
- Research and Development, Inova Diagnostics, San Diego, CA 92131, USA; (K.M.); (A.S.); (C.B.)
- Correspondence: or
| | - Kishore Malyavantham
- Research and Development, Inova Diagnostics, San Diego, CA 92131, USA; (K.M.); (A.S.); (C.B.)
| | - Andrea Seaman
- Research and Development, Inova Diagnostics, San Diego, CA 92131, USA; (K.M.); (A.S.); (C.B.)
| | - Chelsea Bentow
- Research and Development, Inova Diagnostics, San Diego, CA 92131, USA; (K.M.); (A.S.); (C.B.)
| | - Ariadna Anunciacion-Llunell
- Autoimmune Systemic Diseases Unit, Department of Internal Medicine, Hospital Vall d’Hebron, Universitat Autònoma de Barcelona, 08035 Barcelona, Spain; (A.A.-L.); (A.S.-O.)
| | - María Teresa Sanz-Martínez
- Immunology Department, Hospital Vall d’Hebrón, Universitat Autònoma de Barcelona, 08035 Barcelona, Spain; (M.T.S.-M.); (L.V.-G.)
| | - Laura Viñas-Gimenez
- Immunology Department, Hospital Vall d’Hebrón, Universitat Autònoma de Barcelona, 08035 Barcelona, Spain; (M.T.S.-M.); (L.V.-G.)
| | - Albert Selva-O’Callaghan
- Autoimmune Systemic Diseases Unit, Department of Internal Medicine, Hospital Vall d’Hebron, Universitat Autònoma de Barcelona, 08035 Barcelona, Spain; (A.A.-L.); (A.S.-O.)
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5
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Aguilar-Vazquez A, Chavarria-Avila E, Pizano-Martinez O, Ramos-Hernandez A, Andrade-Ortega L, Rubio-Arellano ED, Vazquez-Del Mercado M. Geographical Latitude Remains as an Important Factor for the Prevalence of Some Myositis Autoantibodies: A Systematic Review. Front Immunol 2021; 12:672008. [PMID: 33968081 PMCID: PMC8100663 DOI: 10.3389/fimmu.2021.672008] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Accepted: 04/06/2021] [Indexed: 11/13/2022] Open
Abstract
The idiopathic inflammatory myopathies (IIM) are characterized by muscular weakness, cutaneous manifestations, muscle damage revealed by increase of muscular enzymes, muscle biopsy, electromyography and changes on magnetic resonance imaging. However, the hallmark of these IIM, is the development of myositis specific antibodies (MSA) or myositis associated antibodies (MAA). The theories about their presence in the serum of IIM is not known. Some studies have suggested that some of these MSA, such as anti-Mi-2 increases according to the intensity of UV radiation. There is scarce information about the environmental factors that might contribute in order to be considered as triggering factors as UV radiation might be. In this review, we analyzed the reported prevalence of MSAs and MAAs regarding to their geographical location and the possible relation with UV radiation. We collected the prevalence data of fifteen MSA and thirteen MAA from 22 countries around the world and we were able to observe a difference in prevalence between countries and continents. We found differences in anti-PL7, anti-Ro52, anti-La and anti-Ku prevalence according to UV radiation level. Otherwise, we observed that anti-Mi-2 prevalence increases near to the Equator meanwhile anti-MJ/NXP2 and anti-ARS prevalence had an opposite behavior increasing their prevalence in the geographical locations farther to the Equator. Our results highlighted the importance to include the UV radiation and other environmental factors in IIM studies, in order to clarify its association with MSA and MAA prevalence as well as its possible role in the immunopathogenesis of these diseases.
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Affiliation(s)
- Andrea Aguilar-Vazquez
- Centro Universitario de Ciencias de la Salud, Doctorado en Ciencias Biomédicas, Universidad de Guadalajara, Guadalajara, Mexico.,Centro Universitario de Ciencias de la Salud, Instituto de Investigación en Reumatología y del Sistema Músculo-Esquelético (IIRSME), Universidad de Guadalajara, Guadalajara, Mexico
| | - Efrain Chavarria-Avila
- Centro Universitario de Ciencias de la Salud, Instituto de Investigación en Reumatología y del Sistema Músculo-Esquelético (IIRSME), Universidad de Guadalajara, Guadalajara, Mexico.,Centro Universitario de Ciencias de la Salud, Departamento de Disciplinas Filosófico, Metodológicas e Instrumentales, Universidad de Guadalajara, Guadalajara, Mexico.,Hospital Civil Dr. Juan I. Menchaca, División de Medicina Interna, Servicio de Reumatología 004086, PNPC CONACyT, Guadalajara, Mexico
| | - Oscar Pizano-Martinez
- Centro Universitario de Ciencias de la Salud, Instituto de Investigación en Reumatología y del Sistema Músculo-Esquelético (IIRSME), Universidad de Guadalajara, Guadalajara, Mexico.,Hospital Civil Dr. Juan I. Menchaca, División de Medicina Interna, Servicio de Reumatología 004086, PNPC CONACyT, Guadalajara, Mexico.,Centro Universitario de Ciencias de la Salud, UDG-CA 703 Inmunología y Reumatología, Universidad de Guadalajara, Guadalajara, Mexico
| | - Alejandra Ramos-Hernandez
- Hospital Civil Dr. Juan I. Menchaca, División de Medicina Interna, Servicio de Reumatología 004086, PNPC CONACyT, Guadalajara, Mexico
| | - Lilia Andrade-Ortega
- Departamento de Reumatología Centro Médico Nacional 20 de Noviembre, Instituto de Seguridad y Servicios Sociales de los Trabajadores del Estado (ISSSTE), Ciudad de México, Mexico
| | - Edy-David Rubio-Arellano
- Centro Universitario de Ciencias de la Salud, Departamento de Fisiología, Universidad de Guadalajara, Guadalajara, Mexico
| | - Monica Vazquez-Del Mercado
- Centro Universitario de Ciencias de la Salud, Instituto de Investigación en Reumatología y del Sistema Músculo-Esquelético (IIRSME), Universidad de Guadalajara, Guadalajara, Mexico.,Hospital Civil Dr. Juan I. Menchaca, División de Medicina Interna, Servicio de Reumatología 004086, PNPC CONACyT, Guadalajara, Mexico.,Centro Universitario de Ciencias de la Salud, UDG-CA 703 Inmunología y Reumatología, Universidad de Guadalajara, Guadalajara, Mexico.,Centro Universitario de Ciencias de la Salud, Departamento de Biología Molecular y Genómica, Universidad de Guadalajara, Guadalajara, Mexico
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Van Horebeek N, Vulsteke JB, Bossuyt X, Claeys KG, Dillaerts D, Poesen K, Lenaerts J, Van Damme P, Blockmans D, De Haes P, De Langhe E. Detection of multiple myositis-specific autoantibodies in unique patients with idiopathic inflammatory myopathy: A single centre-experience and literature review: Systematic review. Semin Arthritis Rheum 2021; 51:486-494. [PMID: 33831755 DOI: 10.1016/j.semarthrit.2021.03.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 02/23/2021] [Accepted: 03/19/2021] [Indexed: 10/21/2022]
Abstract
INTRODUCTION Myositis-specific autoantibodies (MSAs) are thought to be mutually exclusive in patients with idiopathic inflammatory myopathies (IIM) based on studies with immunoprecipitation-based (IP) detection methods. Recently, detection of multiple MSAs in unique patients is increasingly reported, but the extent of this phenomenon remains unclear. METHODS At our centre, we reviewed results from two line immunoassays and one dot immunoassay in 145 IIM patients and 240 controls for the presence of multiple MSAs. Pubmed and Embase were systematically searched for articles mentioning detection of multiple MSAs in IIM patients, published until February 2019. We assessed the frequency, detection method, the precise combinations and clinical phenotypes of participants with multiple MSAs. RESULTS At our centre, detection of multiple MSAs occurred in 3.4-8.3% of patients with IIM, depending on the assay. However, no cases with full concordance across all three assays were identified. Forty-four articles reported detection of multiple MSAs, representing a total of 133 cases, including four patients with a connective tissue disease other than IIM and two healthy controls. In 101 cases all MSAs were detected using only one detection method: 40 cases with IP-based methods (most frequently used technique) and 61 cases with other assay types. In most cases the phenotype of patients with multiple MSAs matched the predicted presentation associated with one MSA and in few cases the phenotype matched with both MSAs. CONCLUSION Detection of multiple MSAs in unique IIM patients is less rare than commonly accepted. Specificity issues of the commercially available multiplex immunoassays may, at least partly, explain the higher frequency compared to IP-based methods. 'True multiple MSA-positive' patients may exist, though they are most likely rare.
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Affiliation(s)
- Nele Van Horebeek
- General Internal Medicine, University Hospitals Leuven, Leuven, Belgium
| | - Jean-Baptiste Vulsteke
- Rheumatology, University Hospitals Leuven, Leuven, Belgium; KU Leuven Department of Development and Regeneration, Skeletal Biology and Engineering Research Centre, Laboratory of Tissue Homeostasis and Disease
| | - Xavier Bossuyt
- Laboratory Medicine, University Hospitals Leuven, Leuven, Belgium; Clinical and Diagnostic Immunology, KU Leuven, Leuven, Belgium
| | - Kristl G Claeys
- Department of Neurology, University Hospitals Leuven, Leuven, Belgium; KU Leuven, Laboratory for Muscle Diseases and Neuropathies, Leuven, Belgium
| | | | - Koen Poesen
- Laboratory Medicine, University Hospitals Leuven, Leuven, Belgium; KU Leuven, Laboratory for Molecular Neurobiomarker Research, Leuven, Belgium
| | - Jan Lenaerts
- Rheumatology, University Hospitals Leuven, Leuven, Belgium
| | - Philip Van Damme
- Department of Neurology, University Hospitals Leuven, Leuven, Belgium; KU Leuven, Department of Neurosciences, Experimental Neurology, VIB Centre for Brain and Disease Research, Laboratory of Neurobiology, Leuven, Belgium
| | - Daniel Blockmans
- General Internal Medicine, University Hospitals Leuven, Leuven, Belgium
| | - Petra De Haes
- Dermatology, University Hospitals Leuven, Leuven, Belgium
| | - Ellen De Langhe
- Rheumatology, University Hospitals Leuven, Leuven, Belgium; KU Leuven Department of Development and Regeneration, Skeletal Biology and Engineering Research Centre, Laboratory of Tissue Homeostasis and Disease.
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Fer F, Allenbach Y, Benveniste O. [Myositis: From classification to diagnosis]. Rev Med Interne 2020; 42:392-400. [PMID: 33248855 DOI: 10.1016/j.revmed.2020.10.379] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 09/26/2020] [Accepted: 10/18/2020] [Indexed: 11/26/2022]
Abstract
Idiopathic inflammatory myopathies, or IIM, are a group of acquired diseases that affect the muscle to a certain extent, and may also affect other organs. They include dermatomyositis, which can affect the muscle eventualy, with a typical skin rash; inclusion body myositis, with a purely muscular expression resulting in a slow progressive deficit; and the former group of "polymyositis", a misnomer that actually includes other categories of IIM, such as immune-mediated necrotizing myopathies, with a severe muscle involvement often presents from the onset of the disease; antisynthetase syndrome, which combines muscle damage, joint involvement and a potentially life-threatening lung disease; and overlapping myositis, which combines muscle damage with other organs involvement connected to another autoimmune disease. The diagnosis of IIM is based on rigorous clinical examination and interrogation, electromyographic data and immunological testing for myositis specific antibodies. This antibody dosage must be extended or repeated if necessary to classify correctly the muscle disease under investigation, as the available tests may not perform well enough. Muscle biopsy, although very informative, is not anymore systematically recommended when the clinic and the antibodies are typical. However, some forms of IIM are sometimes difficult to classify; in these cases, muscle biopsy plays a crucial role in the precise etiological diagnosis.
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Affiliation(s)
- F Fer
- Département de Médecine interne et immunologie clinique, Centre national de référence des maladies neuromusculaires, hôpital Pitié-Salpêtrière, AP-HP, 47-83, boulevard de l'Hôpital, 75651 Paris cedex 13, France.
| | - Y Allenbach
- Département de Médecine interne et immunologie clinique, Centre national de référence des maladies neuromusculaires, hôpital Pitié-Salpêtrière, AP-HP, 47-83, boulevard de l'Hôpital, 75651 Paris cedex 13, France
| | - O Benveniste
- Département de Médecine interne et immunologie clinique, Centre national de référence des maladies neuromusculaires, hôpital Pitié-Salpêtrière, AP-HP, 47-83, boulevard de l'Hôpital, 75651 Paris cedex 13, France
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8
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Martínez-García EA, Lujano-Benítez AV, García-De La Torre I, Vázquez-Del Mercado M. Good response to mycophenolate mofetil on treatment of interstitial lung disease in polymyositis associated with antisynthetase syndrome positive for anti-EJ and anti-Ro52 antibodies. Clin Rheumatol 2020; 39:2837-2839. [DOI: 10.1007/s10067-020-05075-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 03/24/2020] [Accepted: 04/01/2020] [Indexed: 11/28/2022]
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Leurs A, Dubucquoi S, Machuron F, Balden M, Renaud F, Rogeau S, Lopez B, Lambert M, Morell-Dubois S, Maillard H, Béhal H, Hachulla E, Launay D, Sobanski V. Extended myositis-specific and -associated antibodies profile in systemic sclerosis: A cross-sectional study. Joint Bone Spine 2020; 88:105048. [PMID: 32653653 DOI: 10.1016/j.jbspin.2020.06.021] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 06/22/2020] [Indexed: 01/24/2023]
Abstract
OBJECTIVE In systemic sclerosis (SSc) and idiopathic inflammatory myopathies (IIM), auto-antibodies are used in daily practice as potent biomarkers of clinical phenotypes. This study aimed at estimating the prevalence of myositis-specific (MSA) and myositis-associated (MAA) auto-antibodies in a well-characterised SSc patients cohort using two different immunoblot assays, and studying their clinical associations. METHODS In this cross-sectional study, the sera of 300 consecutive patients were tested at the same time with myositis antibodies Euroimmun® and D-tek® immunoblot assays. RESULTS Prevalence of MSA/MAA, MSA and MAA were 17.0%, 8.0% and 9.7%, respectively. When combining results of both tests, anti-PM/Scl 100 were found in 5.0% (95% confidence interval 2.8; 8.1); anti-PM/Scl 75 and anti-TIF1γ in 3.7% (1.8; 6.5); anti-Ku 3.0% (1.4; 5.6); anti-MDA5 in 1.3% (0.4; 3.4); anti-Mi-2 β, anti-NXP2, anti-PL-7 and anti-SRP in 0.7% (0.08; 2.4); anti-EJ and anti-PL-12 in 0.3% (0.01; 1.8) of patients. No reactivity against SAE1, Jo-1 or OJ was observed. Anti-PM/Scl 75 antibodies were associated with interstitial lung disease (80% vs. 42%) and myositis (27% vs. 3%); anti-Ku antibodies were associated with myositis (33% vs. 3%). CONCLUSION In this cross-sectional study of 300 SSc patients, the prevalence of MSA/MAA, MSA and MAA using immunoblot assays were 17.0%, 8.0% and 9.7%, respectively. MAA positivity was associated with ILD and myositis, but this study did not highlight any clinical associations with MSA positivity.
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Affiliation(s)
- Amélie Leurs
- Univ. Lille, U1286 - Infinite - Institute for Translational Research in Inflammation, 59000 Lille, France; Inserm, U1286, 59000 Lille, France; CHU Lille, Département de Médecine Interne et Immunologie Clinique, Centre de Référence des Maladies Auto-immunes Systémiques Rares du Nord et Nord-Ouest de France (CeRAINO), 59000 Lille, France
| | - Sylvain Dubucquoi
- Univ. Lille, U1286 - Infinite - Institute for Translational Research in Inflammation, 59000 Lille, France; Inserm, U1286, 59000 Lille, France; CHU Lille, Institut d'Immunologie, Lille, France
| | - François Machuron
- Univ. Lille, CHU Lille, ULR 2694 - METRICS : Évaluation des technologies de santé et des pratiques médicales, 59000 Lille, France
| | - Maïté Balden
- Univ. Lille, U1286 - Infinite - Institute for Translational Research in Inflammation, 59000 Lille, France; Inserm, U1286, 59000 Lille, France; CHU Lille, Institut d'Immunologie, Lille, France
| | - Florence Renaud
- Univ. Lille, CHU Lille, Institute of Pathology, Centre de Biologie Pathologie Lille ; Centre de Recherche Jean-Pierre AUBERT Neurosciences et Cancer France ; SIRIC OncoLille, 59000 Lille, France
| | | | | | - Marc Lambert
- CHU Lille, Département de Médecine Interne et Immunologie Clinique, Centre de Référence des Maladies Auto-immunes Systémiques Rares du Nord et Nord-Ouest de France (CeRAINO), 59000 Lille, France
| | - Sandrine Morell-Dubois
- CHU Lille, Département de Médecine Interne et Immunologie Clinique, Centre de Référence des Maladies Auto-immunes Systémiques Rares du Nord et Nord-Ouest de France (CeRAINO), 59000 Lille, France
| | - Hélène Maillard
- CHU Lille, Département de Médecine Interne et Immunologie Clinique, Centre de Référence des Maladies Auto-immunes Systémiques Rares du Nord et Nord-Ouest de France (CeRAINO), 59000 Lille, France
| | - Hélène Béhal
- Univ. Lille, CHU Lille, ULR 2694 - METRICS : Évaluation des technologies de santé et des pratiques médicales, 59000 Lille, France
| | - Eric Hachulla
- Univ. Lille, U1286 - Infinite - Institute for Translational Research in Inflammation, 59000 Lille, France; Inserm, U1286, 59000 Lille, France; CHU Lille, Département de Médecine Interne et Immunologie Clinique, Centre de Référence des Maladies Auto-immunes Systémiques Rares du Nord et Nord-Ouest de France (CeRAINO), 59000 Lille, France
| | - David Launay
- Univ. Lille, U1286 - Infinite - Institute for Translational Research in Inflammation, 59000 Lille, France; Inserm, U1286, 59000 Lille, France; CHU Lille, Département de Médecine Interne et Immunologie Clinique, Centre de Référence des Maladies Auto-immunes Systémiques Rares du Nord et Nord-Ouest de France (CeRAINO), 59000 Lille, France
| | - Vincent Sobanski
- Univ. Lille, U1286 - Infinite - Institute for Translational Research in Inflammation, 59000 Lille, France; Inserm, U1286, 59000 Lille, France; CHU Lille, Département de Médecine Interne et Immunologie Clinique, Centre de Référence des Maladies Auto-immunes Systémiques Rares du Nord et Nord-Ouest de France (CeRAINO), 59000 Lille, France.
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10
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Platteel ACM, Wevers BA, Lim J, Bakker JA, Bontkes HJ, Curvers J, Damoiseaux J, Heron M, de Kort G, Limper M, van Lochem EG, Mulder AHL, Saris CGJ, van der Valk H, van der Kooi AJ, van Leeuwen EMM, Veltkamp M, Schreurs MWJ, Meek B, Hamann D. Frequencies and clinical associations of myositis-related antibodies in The Netherlands: A one-year survey of all Dutch patients. J Transl Autoimmun 2019; 2:100013. [PMID: 32743501 PMCID: PMC7388388 DOI: 10.1016/j.jtauto.2019.100013] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 07/25/2019] [Accepted: 07/29/2019] [Indexed: 12/27/2022] Open
Abstract
Idiopathic inflammatory myopathies (IIM) are a heterogeneous group of connective tissue diseases, collectively known as myositis. Diagnosis of IIM is challenging while timely recognition of an IIM is of utter importance considering treatment options and otherwise irreversible (severe) long-term clinical complications. With the EULAR/ACR classification criteria (2017) considerable advancement has been made in the diagnostic workup of IIM. While these criteria take into account clinical parameters as well as presence of one autoantibody, anti-Jo-1, several autoantibodies are associated with IIM and are currently evaluated to be incorporated into classification criteria. As individual antibodies occur at low frequency, the development of line blots allowing multiplex antibody analysis has improved laboratory diagnostics for IIM. The Euroline myositis line-blot assay (Euroimmun) allows screening and semi-quantitative measurement for 15 autoantibodies, i.e. myositis specific antibodies (MSA) to SRP, EJ, OJ, Mi-2α, Mi-2β, TIF1-γ, MDA5, NXP2, SAE1, PL-12, PL-7, Jo-1 and myositis associated antibodies (MAA) to Ku, PM/Scl-75 and PM/Scl-100. To evaluate the clinical significance of detection and levels of these autoantibodies in the Netherlands, a retrospective analysis of all Dutch requests for extended myositis screening within a 1 year period was performed. A total of 187 IIM patients and 632 non-IIM patients were included. We conclude that frequencies of MSA and MAA observed in IIM patients in a routine diagnostic setting are comparable to cohort-based studies. Weak positive antibody levels show less diagnostic accuracy compared to positive antibody levels, except for anti-NXP2. Known associations between antibodies and skin involvement (anti-MDA5, anti-TIF1-γ), lung involvement (anti-Jo-1), and malignancy (anti-TIF1-γ) were confirmed in our IIM study population. The availability of multiplex antibody analyses will facilitate inclusion of additional autoantibodies in clinical myositis guidelines and help to accelerate diagnosing IMM with rare but specific antibodies.
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Affiliation(s)
- Anouk C M Platteel
- St. Antonius Hospital, Department of Medical Microbiology and Immunology, Nieuwegein, the Netherlands
| | - Brigitte A Wevers
- Sanquin Diagnostic Services, Amsterdam, the Netherlands.,Atalmedial, Medical Diagnostic Center, Amsterdam, the Netherlands.,Amsterdam UMC, University of Amsterdam, Department of Experimental Immunology, Amsterdam Infection & Immunity Institute, Amsterdam, the Netherlands
| | - Johan Lim
- Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, Department of Neurology, Amsterdam, the Netherlands
| | - Jaap A Bakker
- Leiden University Medical Center, Department of Clinical Chemistry and Laboratory Medicine, Leiden, the Netherlands
| | - Hetty J Bontkes
- Amsterdam UMC, Vrije Universiteit Amsterdam, Department of Clinical Chemistry, Amsterdam, the Netherlands
| | - Joyce Curvers
- Catharina Hospital Eindhoven, Clinical Laboratory, Eindhoven, the Netherlands
| | - Jan Damoiseaux
- Maastricht University Medical Center, Central Diagnostic Laboratory, Maastricht, the Netherlands
| | - Michiel Heron
- Elisabeth-TweeSteden Hospital, Department of Medical Microbiology and Immunology, Tilburg, the Netherlands
| | | | - Maarten Limper
- University Medical Center Utrecht, Department of Rheumatology and Clinical Immunology, Utrecht, the Netherlands
| | - Ellen G van Lochem
- Rijnstate Hospital, Department of Microbiology and Immunology, Arnhem, the Netherlands
| | | | - Christiaan G J Saris
- Radboud University Medical Center, Donders Institute for Brain Cognition and Behaviour, Department of Neurology, Nijmegen, the Netherlands
| | - Hester van der Valk
- University Medical Center Groningen, Department of Rheumatology and Clinical Immunology, Groningen, the Netherlands
| | - Anneke J van der Kooi
- Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, Department of Neurology, Amsterdam, the Netherlands
| | - Ester M M van Leeuwen
- Amsterdam UMC, University of Amsterdam, Department of Experimental Immunology, Amsterdam Infection & Immunity Institute, Amsterdam, the Netherlands
| | - Marcel Veltkamp
- St Antonius Hospital, Interstitial Lung Diseases Center of Excellence, Department of Pulmonology, Nieuwegein, the Netherlands.,Division of Heart&Lungs, University Medical Center, Utrecht, the Netherlands
| | - Marco W J Schreurs
- Erasmus MC University Medical Centre Rotterdam, Department of Immunology, Rotterdam, the Netherlands
| | - Bob Meek
- St. Antonius Hospital, Department of Medical Microbiology and Immunology, Nieuwegein, the Netherlands
| | - Dörte Hamann
- Sanquin Diagnostic Services, Amsterdam, the Netherlands
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11
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Mahler M, Betteridge Z, Bentow C, Richards M, Seaman A, Chinoy H, McHugh N. Comparison of Three Immunoassays for the Detection of Myositis Specific Antibodies. Front Immunol 2019; 10:848. [PMID: 31114570 PMCID: PMC6503053 DOI: 10.3389/fimmu.2019.00848] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Accepted: 04/01/2019] [Indexed: 11/30/2022] Open
Abstract
Objectives: Standardization of myositis specific antibody (MSA) detection is of high importance because these antibodies are relevant for diagnosis and stratification of patients with idiopathic inflammatory myositis (IIM) and have the potential to be used in classification criteria. Many laboratories rely on immunoprecipitation (IP) for the detection of MSA but this approach is compromised by logistic, standardization, and regulatory challenges. Therefore, reliable alternatives to IP are mandatory. Here we aimed to compare three methods for the detection of MSA. Methods: Our study initiated from a cohort of 1,619 IIM patients (BIRD/University of Bath serology service and UKMyoNet cohorts) and resulted in 157 unique serum samples enriched for higher prevalence of MSA characterized by the laboratory's routine methods, IP and line immunoassay (LIA: Euroimmun). All samples were tested using a novel fully automated particle-based multi-analyte technology (PMAT, Inova Diagnostics, research use only). Analyses included antibodies to PL-7, PL-12, SRP, NXP2, Mi-2, SAE, EJ, MDA5, TIF1γ, SRP, NXP2. Results: Overall high agreements were observed between novel methods (LIA and PMAT) and IP (Cohen's kappa 0.46–0.96) for the detection of MSA. Lowest level of agreement was found for EJ and highest for SAE. Conclusion: The data hold promise for advancements in standardization of MSA assays as well as for the potential inclusion of MSA in future classification criteria.
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Affiliation(s)
| | - Zoe Betteridge
- Department of Pharmacy and Pharmacology, University of Bath, Bath, United Kingdom
| | | | | | - Andrea Seaman
- Inova Diagnostics, Inc., San Diego, CA, United States
| | - Hector Chinoy
- Rheumatology Department, Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre, Salford, United Kingdom.,NIHR Manchester Biomedical Research Centre, Manchester University NHS Foundation Trust, The University of Manchester, Manchester, United Kingdom
| | - Neil McHugh
- Department of Pharmacy and Pharmacology, University of Bath, Bath, United Kingdom
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12
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Betteridge Z, Tansley S, Shaddick G, Chinoy H, Cooper RG, New RP, Lilleker JB, Vencovsky J, Chazarain L, Danko K, Nagy-Vincze M, Bodoki L, Dastmalchi M, Ekholm L, Lundberg IE, McHugh N. Frequency, mutual exclusivity and clinical associations of myositis autoantibodies in a combined European cohort of idiopathic inflammatory myopathy patients. J Autoimmun 2019; 101:48-55. [PMID: 30992170 PMCID: PMC6580360 DOI: 10.1016/j.jaut.2019.04.001] [Citation(s) in RCA: 173] [Impact Index Per Article: 34.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 04/02/2019] [Accepted: 04/02/2019] [Indexed: 01/30/2023]
Abstract
Objectives To determine prevalence and co-existence of myositis specific autoantibodies (MSAs) and myositis associated autoantibodies (MAAs) and associated clinical characteristics in a large cohort of idiopathic inflammatory myopathy (IIM) patients. Methods Adult patients with confirmed IIM recruited to the EuroMyositis registry (n = 1637) from four centres were investigated for the presence of MSAs/MAAs by radiolabelled-immunoprecipitation, with confirmation of anti-MDA5 and anti-NXP2 by ELISA. Clinical associations for each autoantibody were calculated for 1483 patients with a single or no known autoantibody by global linear regression modelling. Results MSAs/MAAs were found in 61.5% of patients, with 84.7% of autoantibody positive patients having a sole specificity, and only three cases (0.2%) having more than one MSA. The most frequently detected autoantibody was anti-Jo-1 (18.7%), with a further 21 specificities each found in 0.2–7.9% of patients. Autoantibodies to Mi-2, SAE, TIF1, NXP2, MDA5, PMScl and the non-Jo-1 tRNA-synthetases were strongly associated (p < 0.001) with cutaneous involvement. Anti-TIF1 and anti-Mi-2 positive patients had an increased risk of malignancy (OR 4.67 and 2.50 respectively), and anti-SRP patients had a greater likelihood of cardiac involvement (OR 4.15). Interstitial lung disease was strongly associated with the anti-tRNA synthetases, anti-MDA5, and anti-U1RNP/Sm. Overlap disease was strongly associated with anti-PMScl, anti-Ku, anti-U1RNP/Sm and anti-Ro60. Absence of MSA/MAA was negatively associated with extra-muscular manifestations. Conclusions Myositis autoantibodies are present in the majority of patients with IIM and identify distinct clinical subsets. Furthermore, MSAs are nearly always mutually exclusive endorsing their credentials as valuable disease biomarkers. Myositis specific autoantibodies very rarely coexist in the one individual allowing endotypes to be more precisely defined. The association of anti-TIF1 and cancer-associated myositis is confirmed with a cut-off age of over 58 years. In a large combined European myositis cohort associations of anti-SRP with carditis and anti-Mi-2 with cancer have emerged. Myositis associated autoantibodies are strongly associated with having myositis in association with another connective tissue disease.
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Affiliation(s)
- Z Betteridge
- Department of Pharmacy and Pharmacology, University of Bath, Bath, UK
| | - S Tansley
- Department of Pharmacy and Pharmacology, University of Bath, Bath, UK
| | - G Shaddick
- Department of Mathematics, University of Exeter, Exeter, UK
| | - H Chinoy
- Centre for Musculoskeletal Research, The University of Manchester, Manchester Academic Health Science Centre, Manchester, UK; National Institute of Health Research Manchester Biomedical Research Centre, Manchester University Foundation Trust.UK; Salford Royal NHS Foundation Trust, Manchester, UK
| | - R G Cooper
- Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool, UK
| | - R P New
- Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool, UK
| | - J B Lilleker
- Centre for Musculoskeletal Research, The University of Manchester, Manchester Academic Health Science Centre, Manchester, UK; Salford Royal NHS Foundation Trust, Manchester, UK
| | - J Vencovsky
- Institute of Rheumatology and Department of Rheumatology, 1stMedical Faculty, Charles University, Prague, Czech Republic
| | - L Chazarain
- Institute of Rheumatology and Department of Rheumatology, 1stMedical Faculty, Charles University, Prague, Czech Republic
| | - K Danko
- Department of Internal Medicine, University of Debrecen, Debrecen, Hungary
| | - M Nagy-Vincze
- Department of Internal Medicine, University of Debrecen, Debrecen, Hungary
| | - L Bodoki
- Department of Internal Medicine, University of Debrecen, Debrecen, Hungary
| | - M Dastmalchi
- Division of Rheumatology, Department of Medicine, Solna Karolinska Institutet, And Karolinska University Hospital, Stockholm, Sweden
| | - L Ekholm
- Division of Rheumatology, Department of Medicine, Solna Karolinska Institutet, And Karolinska University Hospital, Stockholm, Sweden
| | - I E Lundberg
- Division of Rheumatology, Department of Medicine, Solna Karolinska Institutet, And Karolinska University Hospital, Stockholm, Sweden
| | - N McHugh
- Department of Pharmacy and Pharmacology, University of Bath, Bath, UK.
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13
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Damoiseaux J, Vulsteke JB, Tseng CW, Platteel AC, Piette Y, Shovman O, Bonroy C, Hamann D, De Langhe E, Musset L, Chen YH, Shoenfeld Y, Allenbach Y, Bossuyt X. Autoantibodies in idiopathic inflammatory myopathies: Clinical associations and laboratory evaluation by mono- and multispecific immunoassays. Autoimmun Rev 2019; 18:293-305. [DOI: 10.1016/j.autrev.2018.10.004] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2018] [Accepted: 10/23/2018] [Indexed: 12/13/2022]
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14
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Infantino M, Tampoia M, Fabris M, Alessio MG, Previtali G, Pesce G, Deleonardi G, Porcelli B, Musso M, Grossi V, Benucci M, Manfredi M, Bizzaro N. Combining immunofluorescence with immunoblot assay improves the specificity of autoantibody testing for myositis. Rheumatology (Oxford) 2019; 58:1239-1244. [DOI: 10.1093/rheumatology/key451] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2018] [Revised: 12/19/2018] [Indexed: 01/25/2023] Open
Affiliation(s)
- M Infantino
- Laboratorio Immunologia e Allergologia, Ospedale S. Giovanni di Dio, Firenze, Azienda USL Toscana Centro, Italy
| | - M Tampoia
- Laboratorio di Patologia Clinica, Azienda Ospedaliera Universitaria, Policlinico di Bari, Bari, Italy
| | - M Fabris
- SOC Istituto di Patologia Clinica, Azienda Sanitaria Universitaria Integrata di Udine, Udine, Italy
| | - M G Alessio
- Laboratorio Analisi Chimico Cliniche ASST Papa Giovanni XXIII, Bergamo, Italy
| | - G Previtali
- Laboratorio Analisi Chimico Cliniche ASST Papa Giovanni XXIII, Bergamo, Italy
| | - G Pesce
- Lab. Autoimmunologia e Coordinamento con la clinica, Di.M.I. Università degli Studi di Genova, Genova, Italy
| | - G Deleonardi
- Laboratorio Unico Metropolitano, AUSL Bologna, Bologna, Italy
| | - B Porcelli
- Dipartimento Biotecnologie Mediche, Università degli Studi di Siena, Siena, Italy
| | - M Musso
- Laboratorio Analisi ASO S.Croce e Carle, Cuneo, Italy
| | - V Grossi
- Laboratorio Immunologia e Allergologia, Ospedale S. Giovanni di Dio, Firenze, Azienda USL Toscana Centro, Italy
| | - M Benucci
- Reumatologia, Ospedale S. Giovanni di Dio, Firenze, Azienda USL Toscana Centro, Italy
| | - M Manfredi
- Laboratorio Immunologia e Allergologia, Ospedale S. Giovanni di Dio, Firenze, Azienda USL Toscana Centro, Italy
| | - N Bizzaro
- Laboratorio di Patologia Clinica, Ospedale San Antonio, Tolmezzo, Italy, Italy
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15
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Victor J, Zanardo L, Héron-Mermin D, Poursac N, Solé G, Bordes C, Duffau P. [Retrospective analysis of anti-TIF1gamma, anti-NXP2 and anti-SAE1/2 antibodies carriers at Bordeaux university hospital from November 2014 to February 2017]. Rev Med Interne 2018; 40:70-81. [PMID: 30527961 DOI: 10.1016/j.revmed.2018.11.003] [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: 03/01/2018] [Revised: 10/04/2018] [Accepted: 11/11/2018] [Indexed: 11/16/2022]
Abstract
INTRODUCTION Dermatomyositis are rare autoimmune diseases. The discovery of specific antibodies such as the anti-TIF1γ, anti-SAE1/2 and anti-NXP2 antibodies has been associated with specific clinical phenotypes. The recent development of standardized kits based on immunodot method is a progress in dermatomyositis diagnosis. Here, we report the clinical characteristics of patients carrying these antibodies with or without clinical setting of dermatomyositis. METHODS This single-center french retrospective study was conducted from November 2014 to February 2017 at Bordeaux university hospital. Patients carrying anti-TIF1γ, anti-SAE1/2 and anti-NXP2 antibodies, detected by immunodot, were included. RESULTS Among the 58 patients included, only 10 were finally diagnosed with dermatomyositis. Some form of cancer was found in all anti-TIF1γ antibodies positive patients associated with dermatomyositis. Among the 48 anti-TIF1γ, anti-SAE1/2 and anti-NXP2 antibodies positive patients without clinical phenotype of dermatomyositis, 30 had autoimmune or inflammatory condition and 39 patients presented a significant biological autoimmunity. None of them developed dermatomyositis during the follow-up. CONCLUSION The immunodot kit allowed the diagnosis of 10 dermatomyositis. A high number of autoantibody positive patients without dermatomyositis raises the issue of the immunodot's performances in the context of biological autoimmunity.
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Affiliation(s)
- J Victor
- Service de médecine interne, hôpital de Bordeaux, hôpital Saint-André, 1, rue Jean-Burguet, 33000 Bordeaux, France
| | - L Zanardo
- Laboratoire d'immunologie et immunogénétique, hôpital de Bordeaux, 33000 Bordeaux, France
| | - D Héron-Mermin
- Service de dermatologie, hôpital de Bordeaux, 33000 Bordeaux, France
| | - N Poursac
- Service de rhumatologie, hôpital de Bordeaux, 33000 Bordeaux, France
| | - G Solé
- Service de neurologie, hôpital de Bordeaux, 33000 Bordeaux, France
| | - C Bordes
- Laboratoire d'immunologie et immunogénétique, hôpital de Bordeaux, 33000 Bordeaux, France; CNRS-UMR5164 immuno ConcEpT, université de Bordeaux, 33000 Bordeaux, France
| | - P Duffau
- Service de médecine interne, hôpital de Bordeaux, hôpital Saint-André, 1, rue Jean-Burguet, 33000 Bordeaux, France; CNRS-UMR5164 immuno ConcEpT, université de Bordeaux, 33000 Bordeaux, France.
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An effective algorithm for the serological diagnosis of idiopathic inflammatory myopathies: The key role of anti-Ro52 antibodies. Clin Chim Acta 2017; 475:15-19. [DOI: 10.1016/j.cca.2017.10.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Revised: 09/06/2017] [Accepted: 10/02/2017] [Indexed: 11/23/2022]
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17
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