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Decreased T cell populations contribute to the increased severity of COVID-19

Rui Liu1, Ying Wang2, Jie Li3

  • 1Department of Clinical Laboratory, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, PR China.

Clinica Chimica Acta; International Journal of Clinical Chemistry
|May 15, 2020
PubMed

Insights

COVID-19 infection significantly reduces T lymphocyte subsets (CD3+, CD4+, and CD8+). These reductions correlate with disease severity, indicating T cell monitoring is crucial for critical COVID-19 patients.

Area of Science:

  • Immunology
  • Virology
  • Clinical Medicine

Background:

  • COVID-19 infection impacts various lymphocyte subsets.
  • Investigating the relationship between lymphocyte subset changes and disease severity is essential.

Purpose of the Study:

  • To analyze alterations in main lymphocyte subsets in COVID-19 patients.
  • To determine if these changes correlate with disease severity.

Main Methods:

  • 154 COVID-19 patients were categorized into moderate, severe, and critical groups.
  • Flow cytometry was employed to quantify lymphocyte subsets.

Main Results:

  • A decrease in CD3+, CD4+, and CD8+ T lymphocyte subsets was observed in COVID-19 patients.
  • The critical group exhibited significantly greater reductions in CD3+, CD4+, and CD8+ T cells compared to moderate and severe groups (P < 0.001, P = 0.005, P = 0.001).

Conclusions:

  • Reduced CD3+, CD4+, and CD8+ T lymphocyte counts may indicate COVID-19 severity.
  • Monitoring T cell dynamics is vital for diagnosing and managing severe and critical COVID-19 cases.
Abstract

Keywords:
CD3(+) T cellsCD4(+) T cellsCD8(+) T cellsCOVID-19Lymphocyte subsets

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