RT journal article T1 Serum microRNAs targeting ACE2 and RAB14 genes distinguish asymptomatic from critical COVID-19 patients A1 Calderón Domínguez, María A1 Trejo Gutiérrez, Eva Lucía A1 González Rovira, Almudena A1 Beltrán Camacho, Lucía A1 Rojas Torres, Marta A1 Eslava Alcón, Sara A1 Sánchez Morillo, Daniel A1 Calderón-Domínguez, Juan A1 Martinez‑Nicolás, Mª Pilar A1 Gonzalez-Beitia, Estibaliz A1 Nieto-Martín, Mª Dolores A1 Trujillo-Soto, Teresa A1 Rodríguez Iglesias, Manuel Antonio A1 Moreno, Juan A. A1 Moreno Luna, Rafael A1 Durán Ruiz, María del Carmen A2 BiomedicinaBiotecnología y Salud Pública A2 Ingeniería en AutomáticaElectrónica, Arquitectura y Redes de Computadores AB Despite the extraordinary advances achieved to beat COVID-19 disease, many questions remain unsolved, including the mechanisms of action of SARS-CoV-2 and which factors determine why individuals respond so differently to the viral infection. Herein, we performed an in silico analysis to identify host microRNA targeting ACE2, TMPRSS2, and/or RAB14, all genes known to participate in viral entry and replication. Next, the levels of six microRNA candidates previously linked to viral and respiratory-related pathologies were measured in the serum of COVID-19-negative controls (n = 16), IgG-positive COVID-19 asymptomatic individuals (n = 16), and critical COVID-19 patients (n = 17). Four of the peripheral micro-RNAs analyzed (hsa-miR-32-5p, hsa-miR-98-3p, hsa-miR-423-3p, and hsa-miR-1246) were upregulated in COVID-19 critical patients compared with COVID-19-negative controls. Moreover, hsa-miR-32-5p and hsa-miR-1246 levels were also altered in critical versus asymptomatic individuals. Furthermore, these microRNA target genes were related to viral infection, inflammatory response, and coagulation-related processes. In conclusion, SARS-CoV-2 promotes the alteration of microRNAs targeting the expression of key proteins for viral entry and replication, and these changes are associated with disease severity. The microRNAs identified could be taken as potential biomarkers of COVID-19 progression as well as candidates for future therapeutic approaches against this disease. PB ELSEVIER SN 2162-2531 YR 2022 FD 2022-09 LK http://hdl.handle.net/10498/27709 UL http://hdl.handle.net/10498/27709 LA eng DS Repositorio Institucional de la Universidad de Cádiz RD 07-nov-2026