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Immune phenotypes that are associated with subsequent COVID-19 severity inferred from post-recovery samples. | LitMetric

AI Article Synopsis

  • Severe COVID-19 is linked to significant changes in the immune system, particularly affecting T cells and specific immune cell types.
  • Genome-wide association studies (GWAS) reveal that certain chemokine receptors and type I interferon pathways are associated with severe illness.
  • Research shows that individuals recovering from severe COVID-19 have lower counts of critical immune cells and altered chemokine receptor levels, suggesting key immune mechanisms that could influence disease severity.

Article Abstract

Severe COVID-19 causes profound immune perturbations, but pre-infection immune signatures contributing to severe COVID-19 remain unknown. Genome-wide association studies (GWAS) identified strong associations between severe disease and several chemokine receptors and molecules from the type I interferon pathway. Here, we define immune signatures associated with severe COVID-19 using high-dimensional flow cytometry. We measure the cells of the peripheral immune system from individuals who recovered from mild, moderate, severe or critical COVID-19 and focused only on those immune signatures returning to steady-state. Individuals that suffered from severe COVID-19 show reduced frequencies of T cell, mucosal-associated invariant T cell (MAIT) and dendritic cell (DC) subsets and altered chemokine receptor expression on several subsets, such as reduced levels of CCR1 and CCR2 on monocyte subsets. Furthermore, we find reduced frequencies of type I interferon-producing plasmacytoid DCs and altered IFNAR2 expression on several myeloid cells in individuals recovered from severe COVID-19. Thus, these data identify potential immune mechanisms contributing to severe COVID-19.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9700777PMC
http://dx.doi.org/10.1038/s41467-022-34638-2DOI Listing

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