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Martínez-Martínez L, Lacruz AC, Querol L, Cortés-Vicente E, Pascual E, Rojas-García R, Reyes-Leiva D, Álvaro Y, Moltó E, Ortiz E, Gallardo E, Juárez C, Mariscal A. Inter-laboratory comparison of routine autoantibody detection methods for autoimmune neuropathies and myasthenia gravis. J Neurol 2024:10.1007/s00415-024-12317-0. [PMID: 38578496 DOI: 10.1007/s00415-024-12317-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 03/04/2024] [Accepted: 03/08/2024] [Indexed: 04/06/2024]
Abstract
Serological tests are important to detect autoantibodies (autoAbs) in patients with autoimmune neuropathies (AN) and myasthenia gravis (MG) as they are biomarkers for diagnosis, stratification, treatment selection, and monitoring. However, tests to detect autoAbs frequently lack proper standardization and results differ across diagnostic laboratories. We compared results for tests routinely performed in Spanish diagnostic laboratories to detect AN and MG autoAbs. In the Spanish Society of Immunology Autoimmunity Group national workshop, serum samples from 13 patients with AN or MG were tested for anti-ganglioside, anti-myelin-associated glycoprotein (MAG), anti-nicotinic acetylcholine receptor (AChR), and anti-muscle-specific kinase (MuSK) autoAbs using reference methods and were distributed for analysis to 27 participating laboratories using their routine methods. Overserved were inter-laboratory variability and worryingly low sensitivity, especially for anti-ganglioside immunoglobulin G and anti-MAG autoAb detection. This pilot study reflects autoAbs detection state of the art in AN and MG testing in leading diagnostic laboratories in Spain, highlighting the need for standardization prior to clinical use.
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Affiliation(s)
- Laura Martínez-Martínez
- Immunology Department, Hospital de La Santa Creu I Sant Pau, Universitat Autònoma de Barcelona, Sant Pau Biomedical Research Institute (IIB Sant Pau), Barcelona, Spain
| | - Anna Calvet Lacruz
- Immunology Department, Hospital de La Santa Creu I Sant Pau, Universitat Autònoma de Barcelona, Sant Pau Biomedical Research Institute (IIB Sant Pau), Barcelona, Spain
| | - Luis Querol
- Neurology Department, Neuromuscular Diseases Unit, Hospital de La Santa Creu I Sant Pau, Biomedical Research Institute Sant Pau (IIB Sant Pau), Barcelona, Spain
- Neuromuscular Diseases Unit, Centre for Networked Biomedical Research in Rare Diseases (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
| | - Elena Cortés-Vicente
- Neurology Department, Neuromuscular Diseases Unit, Hospital de La Santa Creu I Sant Pau, Biomedical Research Institute Sant Pau (IIB Sant Pau), Barcelona, Spain
- Neuromuscular Diseases Unit, Centre for Networked Biomedical Research in Rare Diseases (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
| | - Elba Pascual
- Neurology Department, Neuromuscular Diseases Unit, Hospital de La Santa Creu I Sant Pau, Biomedical Research Institute Sant Pau (IIB Sant Pau), Barcelona, Spain
- Neuromuscular Diseases Unit, Centre for Networked Biomedical Research in Rare Diseases (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
| | - Ricard Rojas-García
- Neurology Department, Neuromuscular Diseases Unit, Hospital de La Santa Creu I Sant Pau, Biomedical Research Institute Sant Pau (IIB Sant Pau), Barcelona, Spain
- Neuromuscular Diseases Unit, Centre for Networked Biomedical Research in Rare Diseases (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
| | - David Reyes-Leiva
- Neurology Department, Neuromuscular Diseases Unit, Hospital de La Santa Creu I Sant Pau, Biomedical Research Institute Sant Pau (IIB Sant Pau), Barcelona, Spain
| | - Yolanda Álvaro
- Immunology Department, Hospital de La Santa Creu I Sant Pau, Universitat Autònoma de Barcelona, Sant Pau Biomedical Research Institute (IIB Sant Pau), Barcelona, Spain
| | - Elisabeth Moltó
- Immunology Department, Hospital de La Santa Creu I Sant Pau, Universitat Autònoma de Barcelona, Sant Pau Biomedical Research Institute (IIB Sant Pau), Barcelona, Spain
| | - Esther Ortiz
- Immunology Department, Hospital de La Santa Creu I Sant Pau, Universitat Autònoma de Barcelona, Sant Pau Biomedical Research Institute (IIB Sant Pau), Barcelona, Spain
| | - Eduard Gallardo
- Neurology Department, Neuromuscular Diseases Unit, Hospital de La Santa Creu I Sant Pau, Biomedical Research Institute Sant Pau (IIB Sant Pau), Barcelona, Spain
- Neuromuscular Diseases Unit, Centre for Networked Biomedical Research in Rare Diseases (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
| | - Cándido Juárez
- Immunology Department, Hospital de La Santa Creu I Sant Pau, Universitat Autònoma de Barcelona, Sant Pau Biomedical Research Institute (IIB Sant Pau), Barcelona, Spain
| | - Anaís Mariscal
- Immunology Department, Hospital de La Santa Creu I Sant Pau, Universitat Autònoma de Barcelona, Sant Pau Biomedical Research Institute (IIB Sant Pau), Barcelona, Spain.
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