Torres-Duran, MariaLopez-Campos, Jose LuisRodriguez-Hermosa, Juan LuisEsquinas, CristinaMartinez-Gonzalez, CristinaHernandez-Perez, Jose MariaRodriguez, CarlotaBustamante, AnaCasas-Maldonado, FranciscoBarrecheguren, MiriamGonzalez, CruzMiravitlles, Marc2023-05-032023-05-032022-09-26Torres-Durán M, López-Campos JL, Rodríguez-Hermosa JL, Esquinas C, Martínez-González C, Hernández-Pérez JM, et al. Demographic and clinical characteristics of patients with α1-antitrypsin deficiency genotypes PI*ZZ and PI*SZ in the Spanish registry of EARCO. ERJ Open Res. 2022 Sep 26;8(3):00213-2022.2312-0541http://hdl.handle.net/10668/20257The Spanish registry of α1-antitrypsin deficiency (AATD) integrated in the European Alpha-1 Research Collaboration (EARCO) provides information about the characteristics of patients , in particular those with the PI*SZ genotype , which is frequent in Spain .Individuals with severe AATD defined as proteinase inhibitor (PI) genotypes PI*ZZ, PI*SZ and other rare deficient variants were included from February 1, 2020, to February 1, 2022. The analysis focused on a comparison of the characteristics of PI*ZZ and PI*SZ patients .409 patients were included (53.8% men ) with a mean±sd age of 53.5±15.9 years. Genotypes were PI*ZZ in 181 (44.7%), PI*SZ in 163 (40.2%), PI*SS in 29 (7.2%) and other in 32 (7.9%). 271 (67.4%) had lung disease : 175 chronic obstructive pulmonary disease (43.5%), 163 emphysema (40.5%) and 83 bronchiectasis (20.6%). Patients with the PI*SZ genotype were younger, more frequently non-index cases and had a lower frequency of respiratory diseases except asthma compared with PI*ZZ patients . Among patients with respiratory diseases , PI*SZ individuals were significantly older both at onset of symptoms and at diagnosis ; only asthma was more frequent in PI*SZ than in PI*ZZ individuals. Twelve PI*SZ patients (15.4%) received augmentation therapy compared with 94 PI*ZZ patients (66.2%; p<0.001).There is a high prevalence of PI*SZ in Spain . Patients with the PI*SZ genotype were older at symptom onset and diagnosis and had less severe lung disease compared with PI*ZZ patients . The prevalence of asthma was higher in PI*SZ, and up to 15% of PI*SZ patients received augmentation therapy .enAttribution-NonCommercial 4.0 Internationalhttp://creativecommons.org/licenses/by-nc/4.0/PrevalencePulmonary EmphysemaAsthmaRegistriesMaleSpainHumansPulmonary Disease, Chronic ObstructiveGenotypeRespiration DisordersEmphysemaBronchiectasisPeptide Hydrolasesresearch article36171983open accessGenotipoPrevalenciaEnfermedades pulmonaresTerapéuticaDiagnósticoEnfisemaEnfermedades respiratoriasInvestigaciónBronquiectasiaPéptido HidrolasasEnfermedad Pulmonar Obstructiva Crónica10.1183/23120541.00213-2022PMC9511153https://openres.ersjournals.com/content/erjor/8/3/00213-2022.full.pdfhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC9511153/pdf