Related Experiment Video
Updated: Oct 23, 2025
Dynamic Monitoring of Seroconversion using a Multianalyte Immunobead Assay for Covid-19
Published on: February 16, 2022
[Relevant immunologic markers in COVID-19]
Brahim Admou1,2
1Laboratoire d'Immunologie, Centre de Recherche Clinique, Centre Hospitalier Universitaire Mohamed-VI, Marrakech, Maroc.
Insights
Severe COVID-19 involves immune system abnormalities like high cytokine release and T cell lymphopenia. These markers indicate disease severity and guide intensive care unit admission and patient monitoring.
Area of Science:
- Immunology
- Virology
- Critical Care Medicine
Background:
- Severe COVID-19 presents with significant immunological dysregulation.
- Key features include excessive pro-inflammatory cytokine release and lymphopenia.
Purpose of the Study:
- To identify immunological markers associated with severe COVID-19.
- To establish criteria for disease severity and intensive care unit admission.
Main Methods:
- Analysis of immunological parameters in COVID-19 patients.
- Correlation of cytokine levels (e.g., IL-6) and T cell counts (CD4, CD8) with disease severity.
Main Results:
- Massive release of cytokines (IL-6, TNF-α, IL-1b, IFN-y, MCP-1) and T cell lymphopenia (CD3, CD4, CD8) characterize severe COVID-19.
- These immunological abnormalities correlate with acute severe respiratory syndrome.
- Markers like high IL-6 and T cell lymphopenia, alongside leukopenia, elevated CRP, ferritin, and D-dimers, indicate severity.
Conclusions:
- High IL-6 levels and CD4/CD8 T cell lymphopenia are critical indicators of COVID-19 severity.
- These markers aid in rapid intensive care unit admission decisions.
- These immunological parameters are valuable for ongoing patient monitoring.
Abstract:
In its severe form, corona virus disease-19 (COVID-19) is characterized by various immunological abnormalities, dominated by massive pro-inflammatory cytokine and chemokine release, such as IL-6, TNF-α, IL-1b, IFN-y and monocyte chemoattractant protein-1 (MCP-1), associated with T CD3, T CD4 and T CD8 lymphopenia. These two abnormalities are significantly associated with COVID-19 acute severe respiratory syndrome. Conversely, these markers decrease during the favorable course of the disease. Coupled with other biological parameters such as leukopenia, increased level of CRP (C Reactive Protein), ferritin and D-dimers, high levels of IL-6 with CD4 and CD8 T cell lymphopenia may be considered as criteria of disease severity, justifying a rapid admission to the intensive care unit, and are also useful for patient monitoring.
