RT Journal Article T1 A Short Corticosteroid Course Reduces Symptoms and Immunological Alterations Underlying Long-COVID A1 Utrero Rico, Alberto A1 Ruiz Ruigómez, María A1 Laguna Goya, Rocío A1 Arrieta Ortubay, Estíbaliz A1 Chivite Lacaba, Marta A1 González Cuadrado, Cecilia A1 Lalueza Blanco, Antonio A1 Almendro Vázquez, Patricia A1 Serrano, Antonio A1 Aguado García, José María A1 Lumbreras Bermejo, Carlos Juan A1 Paz Artal, Estela Natividad AB Despite the growing number of patients with persistent symptoms after acute SARS-CoV-2 infection, the pathophysiology underlying long-COVID is not yet well characterized, and there is no established therapy. We performed a deep immune profiling in nine patients with persistent symptoms (PSP), before and after a 4-day prednisone course, and five post-COVID-19 patients without persistent symptoms (NSP). PSP showed a perturbed distribution of circulating mononuclear cell populations. Symptoms in PSP were accompanied by a pro-inflammatory phenotype characterized by increased conventional dendritic cells and augmented expression of antigen presentation, co-stimulation, migration, and activation markers in monocytes. The adaptive immunity compartment in PSP showed a Th1-predominance, decreased naïve and regulatory T cells, and augmentation of the PD-1 exhaustion marker. These immune alterations reverted after the corticosteroid treatment and were maintained during the 4-month follow-up, and their normalization correlated with clinical amelioration. The current work highlights an immunopathogenic basis together with a possible role for steroids in the treatment for long-COVID. PB MPDI SN 2227-9059 YR 2021 FD 2021-10-26 LK https://hdl.handle.net/20.500.14352/4651 UL https://hdl.handle.net/20.500.14352/4651 LA eng NO Utrero Rico, A., Ruiz Ruigómez, M., Laguna Goya, R. et al. «A Short Corticosteroid Course Reduces Symptoms and Immunological Alterations Underlying Long-COVID». Biomedicines, vol. 9, n.o 11, octubre de 2021, p. 1540. DOI.org (Crossref), https://doi.org/10.3390/biomedicines9111540. NO Instituto de Salud Carlos III/Ministerio de Economía, Comercio y Empresa (España)/Fondo Europeo de Desarrollo Regional NO Comunidad de Madrid DS Docta Complutense RD 10 may 2025