RT Journal Article T1 Alterations in Circulating Monocytes Predict COVID-19 Severity and Include Chromatin Modifications Still Detectable Six Months after Recovery A1 Utrero Rico, Alberto A1 González Cuadrado, Cecilia A1 Chivite Lacaba, Marta A1 Cabrera Marante, Óscar A1 Laguna Goya, Rocío A1 Almendro Vázquez, Patricia A1 Díaz Pedroche, Carmen A1 Ruiz Ruigómez, María A1 Lalueza Blanco, Antonio A1 Folgueira López, María Dolores A1 Vázquez, Enrique A1 Quintas, Ana A1 Berges Buxeda, Marcos J. A1 Martín Rodriguez, Moisés A1 Dopazo, Ana A1 Serrano Hernández, Antonio A1 Aguado García, José María A1 Paz Artal, Estela Natividad AB An early analysis of circulating monocytes may be critical for predicting COVID-19 course and its sequelae. In 131 untreated, acute COVID-19 patients at emergency room arrival, monocytes showed decreased surface molecule expression, including low HLA-DR, in association with an inflammatory cytokine status and limited anti-SARS-CoV-2-specific T cell response. Most of these alterations had normalized in post-COVID-19 patients 6 months after discharge. Acute COVID-19 monocytes transcriptome showed upregulation of anti-inflammatory tissue repair genes such as BCL6, AREG and IL-10 and increased accessibility of chromatin. Some of these transcriptomic and epigenetic features still remained in post-COVID-19 monocytes. Importantly, a poorer expression of surface molecules and low IRF1 gene transcription in circulating monocytes at admission defined a COVID-19 patient group with impaired SARS-CoV-2-specific T cell response and increased risk of requiring intensive care or dying. An early analysis of monocytes may be useful for COVID-19 patient stratification and for designing innate immunity-focused therapies. PB MDPI SN 2227-9059 YR 2021 FD 2021-09-10 LK https://hdl.handle.net/20.500.14352/5048 UL https://hdl.handle.net/20.500.14352/5048 LA eng NO Utrero Rico, A., González Cuadrado, C., Chivite Lacaba, M. et al. «Alterations in Circulating Monocytes Predict COVID-19 Severity and Include Chromatin Modifications Still Detectable Six Months after Recovery». Biomedicines, vol. 9, n.o 9, septiembre de 2021, p. 1253. DOI.org (Crossref), https://doi.org/10.3390/biomedicines9091253. NO This study was supported by the Instituto de Salud Carlos III, Spanish Ministry of Science and Innovation (COVID-19 research call COV20/00181)—co-financed by the European Development Regional Fund “A way to achieve Europe” and by Consejería de Sanidad de la Comunidad de Madrid (CÍVICO study 2020/0082). R.L.G. and O.C.M. hold a research contract “Rio Hortega” (CM19/00120 and CM19/00092, respectively) from the Instituto de Salud Carlos III, Spanish Ministry of Science and Innovation. MCL holds a predoctoral fellowship (FPU19/06393) from the Spanish Ministry of Science and Innovation. NO Unión Europea NO Ministerio de Ciencia, Innovación y Universidades (España) NO Comunidad de Madrid NO Instituto de Salud Carlos III DS Docta Complutense RD 3 abr 2025