RT Journal Article T1 Hemodialysis-Associated Immune Dysregulation in SARS-CoV-2-Infected End-Stage Renal Disease Patients A1 González Cuadrado, Cecilia A1 Caro Espada, Paula Jara A1 Chivite Lacaba, Marta A1 Utrero Rico, Alberto A1 Lozano Yuste, Claudia A1 Gutierrez Solis, Elena A1 Morales Ruiz, Enrique A1 Sandino Pérez, Justo A1 Gil Etayo, Francisco Javier A1 Allende Martínez, Luis Miguel A1 Laguna Goya, Rocío A1 Paz Artal, Estela Natividad AB Patients on hemodialysis show dysregulated immunity, basal hyperinflammation and a marked vulnerability to COVID-19. We evaluated the immune profile in COVID-19 hemodialysis patients and the changes associated with clinical deterioration after the hemodialysis session. Recruited patients included eight hemodialysis subjects with active, PCR-confirmed SARS-CoV-2 infection, five uninfected hemodialysis patients and five healthy controls. In SARS-CoV-2-infected hemodialysis patients TNF-α, IL-6 and IL-8 were particularly increased. Lymphopenia was mostly due to reduction in CD4+ T, B and central memory CD8+ T cells. There was a predominance of classical and intermediate monocytes with reduced HLA-DR expression and enhanced production of pro-inflammatory molecules. Immune parameters were analysed pre- and post-hemodialysis in three patients with COVID-19 symptoms worsening after the hemodialysis session. There was a higher than 2.5-fold increase in GM-CSF, IFN-γ, IL-1β, IL-2, IL-6, IL-17A and IL-21 in serum, and augmentation of monocytes-derived TNF-α, IL-1β and IL-8 and CXCL10 (p < 0.05). In conclusion, COVID-19 in hemodialysis patients associates with alteration of lymphocyte subsets, increasing of pro-inflammatory cytokines and monocyte activation. The observed worsening during the hemodialysis session in some patients was accompanied by augmentation of particular inflammatory cytokines, which might suggest biomarkers and therapeutic targets to prevent or mitigate the hemodialysis-related deterioration during SARS-CoV-2 infection. PB MDPI SN 1422-0067 YR 2023 FD 2023-01-15 LK https://hdl.handle.net/20.500.14352/105167 UL https://hdl.handle.net/20.500.14352/105167 LA eng NO González-Cuadrado, C.; Caro-Espada, P.J.; Chivite-Lacaba, M.; Utrero-Rico, A.; Lozano-Yuste, C.; Gutierrez-Solis, E.; Morales, E.; Sandino-Pérez, J.; Gil-Etayo, F.J.; Allende-Martínez, L.; et al. Hemodialysis-Associated Immune Dysregulation in SARS-CoV-2-Infected End-Stage Renal Disease Patients. Int. J. Mol. Sci. 2023, 24, 1712. https://doi.org/10.3390/ijms24021712 NO Fondos FEDER ; Ayuda Formación del Profesorado FPU19/06393 ; Contrato de Investigaciçon “Rio Hortega” (CM19/00120) NO European Commission NO Instituto de Salud Carlos III NO Ministerio de Ciencia e Innovación (España) NO Comunidad de Madrid DS Docta Complutense RD 25 may 2025