Abstract
Antinuclear antibodies (ANA) are the most widely used immunological test for the diagnosis of autoimmune diseases. Despite the recommendations of experts, there is some variability in performing and interpreting this test in routine practice. In this context, the Spanish Group on Autoimmune Diseases (GEAI) of the Spanish Society of Immunology (SEI) conducted a national survey of 50 autoimmunity laboratories. Here we report the survey results on ANA testing, detection of related antigens, and our recommendations. The survey showed that most of the participating laboratories use a similar approach for most key practices: 84% perform ANA by indirect immunofluorescence (IIF) on HEp-2 cells as the screening methodology while the other laboratories use IIF to confirm positive screens; 90% report ANA test results as either negative or positive with titer and pattern; 86% indicated that the ANA pattern conditioned follow-up testing for specific antigen-related antibodies; and 70% confirm positive anti-dsDNA. However, testing practices were highly heterogeneous for certain items, such as sera dilutions and the minimum time period for repeating ANA and related antigen determinations. Overall, this survey shows that most autoimmune laboratories in Spain use a similar approach but that further standardization of testing and reporting protocols is needed.
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The data presented in this study are available on request from the corresponding author.
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Acknowledgements
We would like to thank the survey participants: Cristina Abad Molina (H. Clínico Univ. de Valladolid, Valladolid); Aránzazu Alfranca (H. de La Princesa, Madrid); Delia Almeida (H. Univ. Nuestra Señora de Candelaria, Santa Cruz de Tenerife); Mª José Amengual (Corporació Sanitàra Parc Taulí, Sabadell); Belén Aparicio (Comp. Asist. Univ. de Salamanca, Salamanca); Rosario Caro Narros (Comp. Asist. de Segovia, Segovia); Clara Esteve Cols (CLILAB Diagnòstics, Vilafranca del Penedés); Mireia Fonolleda Ramboux (CATLAB, Viladecavalls); Concepción González (H. Univ. Virgen Macarena, Sevilla); Nicolás Adolfo Guerrero Navarrete (Comp. Asist. de Zamora, Zamora); Carlos Hierro Delgado (Comp. Asist. de Ávila, Ávila); María Imaz (H. Univ. de Basurto, Bilbao); Laura Jaimez (H. Univ. Virgen de las Nieves, Granada); Montaña Jiménez (H. Virgen del Puerto de Plasencia, Plasencia); Rosa Julià (H. Univ. Son Espases, Palma de Mallorca); Nallibe Lanio (H. Juaneda Miramar de Palma, Palma de Mallorca); Marcos López Hoyos (H. Univ. Marqués de Valdecilla, Santander); Isabel Lorenzo Romo (H. Univ. Rio Hortega, Valladolid); Mª José Martínez Becerra (Fundación Jiménez Díaz, Madrid); Alba Martínez Chamorro (H. Univ. de Jaén, Jaén); Anaís Mariscal (H. Santa Creu i Sant Pau, Barcelona); Pedro Martínez (H. Univ. Virgen de la Arrixaca, Murcia); Juana María Merino Roncal (Clínica Univ. de Navarra, Navarra); Francisco Morandeira Rego (H. Univ. de Bellvitge, Hospitalet de Llobregat); Lourdes Mozo (H. Univ. Central de Asturias, Oviedo); M. José Muñoz- Delgado Mérida (Comp. Asist. de Soria, Soria); Pilar Nozal (H. Univ. la Paz, Madrid); Juliana Lucía Ochoa Grullón (H. Clínico San Carlos, Madrid); Jesún Ontañón (Complejo H. Univ. de Albacete, Albacete); Mª Aránzazu Pacho de Lucas (H. Univ. Cruces, Baracaldo); Jaume Pérez (H. Clínico de Valencia, Valencia); Aresio Plaza (H. Puerta de Hierro, Madrid); Enriqueta Preciado San Miguel (H. Univ. Araba, Vitoria); Bibiana Quirant (H. Germans Trial y Pujol, Badalona); Carmen Rodríguez (H. Univ. Puerta del Mar, Cádiz); Beatriz Sacristán (H. de Mérida, Mérida); Mª Teresa Sanz (H. Univ. Vall d' Hebron, Barcelona); Antonio Serrano (H. Univ. 12 Octubre, Madrid); Pilar Timoneda (Consorci H. General Univ. de València, València); Vicente Villamandos Nica (H.l Univ. de Burgos, Burgos); and Mª José Zaro (H. Don Benito- Villanueva, Don Benito).
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All authors were involved in revising intellectual content, and all authors approved the final version to be published. Study conceptualization, L.M.-M., A.J., G.R., M.A.M., E.V., A.P., R.R. and M.L.V.; Data curation, L.M.-M., J.I.-V., A.J., G.R., M.A.M., Y.B., B.R.B. and M.L.V.; Formal analysis, M.L.V.; Writing of original draft, L.M.-M., J.I.-V. and M.L.V.; writing review and editing, L.M.-M., J.I.-V., A.J., G.R., M.A.M., Y.B., B.R.B and M.L.V.
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Martinez-Martinez, L., Irure-Ventura, J., Jurado, A. et al. Laboratory and clinical practices in antinuclear antibody detection and related antigens: recommendations from a Spanish multicentre survey. Immunol Res 71, 749–759 (2023). https://doi.org/10.1007/s12026-023-09389-x
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DOI: https://doi.org/10.1007/s12026-023-09389-x