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CD4+ T-Cell Depression is Linked to the Severity of COVID-19 and Predicts Mortality

Esma Eryılmaz-Eren1, Mustafa Yavuz Köker2, Aysegul Ulu-Kılıç3

  • 1Department of Infectious Diseases and Clinical Microbiology, Kayseri City Education and Research Hospital, Kayseri, Turkey.

Infectious Diseases & Clinical Microbiology
|April 18, 2024
PubMed

Insights

A low CD4+ T helper cell ratio is a key indicator of severe COVID-19 and predicts poor prognosis. This finding, along with C-reactive protein levels, can aid in clinical patient follow-up.

Area of Science:

  • Immunology
  • Infectious Diseases
  • Clinical Medicine

Background:

  • Most patients with coronavirus disease (COVID-19) exhibit lymphocyte subset abnormalities.
  • Understanding these changes is crucial for assessing disease severity and patient outcomes.

Purpose of the Study:

  • To investigate the distribution of lymphocyte subsets in COVID-19 patients across different severity levels.
  • To determine the relationship between CD4+ T helper cell counts and patient prognosis.

Main Methods:

  • Prospective study of 86 adult COVID-19 patients in a tertiary hospital.
  • Analysis of demographic, clinical data, and peripheral blood flow cytometry results.
  • Evaluation of lymphocyte subset characteristics and predictive values for prognosis.

Main Results:

  • Severe/critical COVID-19 patients showed lower lymphocyte counts and higher age compared to asymptomatic patients.
  • Decreased CD4+ T cell ratio and CD4+/CD8+ ratio were significant indicators of disease severity.
  • CD4+ T cell ratio on admission and day seven, along with C-reactive protein (CRP) levels, were prognostic factors for mortality.

Conclusions:

  • A reduced CD4+ T helper cell ratio is a strong predictor of poor prognosis in COVID-19 patients.
  • Combining CD4+ T cell ratio with CRP levels can enhance clinical monitoring and management of COVID-19.
Abstract

Keywords:
CD4+ T helperlymphocyte subsetsevere COVID-19

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