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Persistent immune abnormalities discriminate post-COVID syndrome from convalescence
Julia Sbierski-Kind1,2,3, Stephan Schlickeiser4,5, Svenja Feldmann6
1Department of Medicine IV, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany.
Infection
|February 7, 2024
Summary
Post-COVID syndrome (PCS) patients exhibit altered innate lymphoid cells (ILCs), with increased ILC precursors and decreased ILC2s. These immune changes may offer biomarkers for PCS and guide therapeutic strategies.
Area of Science:
- Immunology
- Infectious Diseases
- Cell Biology
Background:
- Innate lymphoid cells (ILCs) orchestrate tissue immunity, development, repair, and pathology.
- Post-COVID syndrome (PCS) involves persistent symptoms beyond 12 weeks after acute COVID-19.
- The role of ILCs in PCS development is currently unclear.
Purpose of the Study:
- To investigate the immunological parameters associated with post-COVID syndrome.
- To define the role of innate lymphoid cells (ILCs) in the development of PCS.
Main Methods:
- Multiparametric immune phenotyping was employed.
- Circulating immune cells were analyzed in PCS patients and control groups.
Main Results:
- PCS patients showed expanded circulating ILC precursors (ILCPs) and reduced group 2 innate lymphoid cells (ILC2s) compared to controls.
- Elevated chemokines and cytokines related to immune cell trafficking and endothelial inflammation were observed in PCS patients.
Conclusions:
- Immunological profiles associated with PCS have been defined.
- These findings may aid in identifying biomarkers and developing targeted therapeutic strategies for PCS.
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