Cited by 2,045COVID-19 Clinical Research StudiesSARS-CoV-2 and COVID-19 ResearchAutoimmune and Inflammatory Disorders Research

Complex Immune Dysregulation in COVID-19 Patients with Severe Respiratory Failure

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Giamarellos-Bourboulis, Evangelos J., Netea, Mihai G., Rovina, Nikoletta, Akinosoglou, Karolina, Antoniadou, Anastasia, Antonakos, Nikolaos, Damoraki, Georgia, Gkavogianni, Theologia +20 more·2020·Cell Host & Microbe

Abstract

Proper management of COVID-19 mandates better understanding of disease pathogenesis. The sudden clinical deterioration 7-8 days after initial symptom onset suggests that severe respiratory failure (SRF) in COVID-19 is driven by a unique pattern of immune dysfunction. We studied immune responses of 54 COVID-19 patients, 28 of whom had SRF. All patients with SRF displayed either macrophage activation syndrome (MAS) or very low human leukocyte antigen D related (HLA-DR) expression accompanied by profound depletion of CD4 lymphocytes, CD19 lymphocytes, and natural killer (NK) cells. Tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6) production by circulating monocytes was sustained, a pattern distinct from bacterial sepsis or influenza. SARS-CoV-2 patient plasma inhibited HLA-DR expression, and this was partially restored by the IL-6 blocker Tocilizumab; off-label Tocilizumab treatment of patients was accompanied by increase in circulating lymphocytes. Thus, the unique pattern of immune dysregulation in severe COVID-19 is characterized by IL-6-mediated low HLA-DR expression and lymphopenia, associated with sustained cytokine production and hyper-inflammation.

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Crossref · 10.1016/j.chom.2020.04.009

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  • Tocilizumab increased the number of circulating lymphocytes in COVID-19 patients.

    “the IL-6 receptor antagonist, tocilizumab, increased the number of circulating lymphocytes in COVID-19 patients122.”

    From SARS-CoV-2, COVID-19 and the aging immune system (2021) · cites this paper as [122]

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Authors
Giamarellos-Bourboulis, E. J., Netea, M. G., Rovina, N., Akinosoglou, K., Antoniadou, A., Antonakos, N., Damoraki, G., Gkavogianni, T., Adami, M.-E., Katsaounou, P., Ntaganou, M., Kyriakopoulou, M., Dimopoulos, G., Koutsodimitropoulos, I., Velissaris, D., Koufargyris, P., Karageorgos, A., Katrini, K., Lekakis, V., Lupse, M., Kotsaki, A., Renieris, G., Theodoulou, D., Panou, V., Koukaki, E., Koulouris, N., Gogos, C., & Koutsoukou, A.
Affiliations
  • University of Bonn (DE)
  • National and Kapodistrian University of Athens (GR)
  • University of Patras (GR)
Venue
Cell Host & Microbe
Publisher
Elsevier BV
Published
2020-06
Volume
27
Issue
6
Pages
992-1000.e3
ISSN
1931-3128 (ISSN-L)
OpenAlex
W3016288338
Cited by
2,045
References
16
Citations by year
2026: 39 · 2025: 73 · 2024: 141 · 2023: 228 · 2022: 412 · 2021: 640 · 2020: 508 · 2013: 3
FWCI
58.98
Type
journal article
Language
en
Open access
Locations
  • Cell Host & Microbe (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Radboud Repository (Radboud University) (submittedVersion)
  • Radboud Repository (Radboud University) (submittedVersion, other-oa)
Funders
  • European Research Council (833247)
  • Nederlandse Organisatie voor Wetenschappelijk Onderzoek
  • Pfizer
  • National and Kapodistrian University of Athens
  • Astellas Pharma US
  • Horizon 2020 (847422)
  • Meso Scale Diagnostics
  • Gilead Sciences
Topics
  • Health Sciences › Medicine › Infectious Diseases › COVID-19 Clinical Research Studies
  • Health Sciences › Medicine › Infectious Diseases › SARS-CoV-2 and COVID-19 Research
  • Health Sciences › Medicine › Hematology › Autoimmune and Inflammatory Disorders Research
Keywords
COVID-19 pandemic, severe respiratory failure, immune dysregulation, macrophage activation syndrome, HLA-DR expression, lymphopenia, CD4 depletion, natural killer cells, monocyte cytokine production, interleukin-6, TNF-α, tocilizumab, hyperinflammation, cytokine storm
MeSH terms
COVID-19, Aged, Female, HLA-DR Antigens, Humans, Inflammation, Killer Cells, Natural, Lymphopenia, Macrophage Activation, Male, Monocytes, Pneumonia, Viral, Respiratory Insufficiency, Interleukin-6, Coronavirus Infections, Pandemics, Antibodies, Monoclonal, Humanized

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