Home > Publications Database > Severe COVID-19 Is Marked by a Dysregulated Myeloid Cell Compartment. |
Journal Article | DZNE-2021-00219 |
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2020
Elsevier
New York, NY
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Please use a persistent id in citations: doi:10.1016/j.cell.2020.08.001
Abstract: Coronavirus disease 2019 (COVID-19) is a mild to moderate respiratory tract infection, however, a subset of patients progress to severe disease and respiratory failure. The mechanism of protective immunity in mild forms and the pathogenesis of severe COVID-19 associated with increased neutrophil counts and dysregulated immune responses remain unclear. In a dual-center, two-cohort study, we combined single-cell RNA-sequencing and single-cell proteomics of whole-blood and peripheral-blood mononuclear cells to determine changes in immune cell composition and activation in mild versus severe COVID-19 (242 samples from 109 individuals) over time. HLA-DRhiCD11chi inflammatory monocytes with an interferon-stimulated gene signature were elevated in mild COVID-19. Severe COVID-19 was marked by occurrence of neutrophil precursors, as evidence of emergency myelopoiesis, dysfunctional mature neutrophils, and HLA-DRlo monocytes. Our study provides detailed insights into the systemic immune response to SARS-CoV-2 infection and reveals profound alterations in the myeloid cell compartment associated with severe COVID-19.
Keyword(s): Adult (MeSH) ; Aged (MeSH) ; CD11 Antigens: genetics (MeSH) ; CD11 Antigens: metabolism (MeSH) ; COVID-19 (MeSH) ; Cells, Cultured (MeSH) ; Coronavirus Infections: blood (MeSH) ; Coronavirus Infections: immunology (MeSH) ; Coronavirus Infections: pathology (MeSH) ; Female (MeSH) ; HLA-DR Antigens: genetics (MeSH) ; HLA-DR Antigens: metabolism (MeSH) ; Humans (MeSH) ; Male (MeSH) ; Middle Aged (MeSH) ; Myeloid Cells: cytology (MeSH) ; Myeloid Cells: immunology (MeSH) ; Myelopoiesis (MeSH) ; Pandemics (MeSH) ; Pneumonia, Viral: blood (MeSH) ; Pneumonia, Viral: immunology (MeSH) ; Pneumonia, Viral: pathology (MeSH) ; Proteome: genetics (MeSH) ; Proteome: metabolism (MeSH) ; Proteomics (MeSH) ; Single-Cell Analysis (MeSH) ; COVID-19 ; SARS-CoV-2 ; dysfunctional neutrophils ; emergency myelopoiesis ; immune profiling ; mass cytometry ; monocytes ; neutrophils ; scRNA-seq ; CD11 Antigens ; HLA-DR Antigens ; Proteome
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