Prolonged T-cell activation and long COVID symptoms independently associate with severe COVID-19 at 3 months.

ABSTRACT: Coronavirus disease-19 (COVID-19) causes immune perturbations which may persist long term, and patients frequently report ongoing symptoms for months after recovery. We assessed immune activation at 3-12 months post hospital admission in 187 samples from 63 patients with mild, moderate, or severe disease and investigated whether it associates with long COVID. At 3 months, patients with severe disease displayed persistent activation of CD4⁺ and CD8⁺ T-cells, based on expression of HLA-DR, CD38, Ki67, and granzyme B, and elevated plasma levels of interleukin-4 (IL-4), IL-7, IL-17, and tumor necrosis factor-alpha (TNF-α) compared to mild and/or moderate patients. Plasma from severe patients at 3 months caused T-cells from healthy donors to upregulate IL-15Rα, suggesting

SUBMITTER: Santopaolo M 

PROVIDER: S-EPMC10319436 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature