Circulating effector γδ T cell populations are associated with acute coronavirus disease 19 in unvaccinated individuals

Immunol Cell Biol. 2023 Apr;101(4):321-332. doi: 10.1111/imcb.12623. Epub 2023 Feb 19.

Abstract

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection causes severe coronavirus disease 2019 (COVID-19) in a small proportion of infected individuals. The immune system plays an important role in the defense against SARS-CoV-2, but our understanding of the cellular immune parameters that contribute to severe COVID-19 disease is incomplete. Here, we show that populations of effector γδ T cells are associated with COVID-19 in unvaccinated patients with acute disease. We found that circulating CD27neg CD45RA+ CX3CR1+ Vδ1effector cells expressing Granzymes (Gzms) were enriched in COVID-19 patients with acute disease. Moreover, higher frequencies of GzmB+ Vδ2+ T cells were observed in acute COVID-19 patients. SARS-CoV-2 infection did not alter the γδ T cell receptor repertoire of either Vδ1+ or Vδ2+ subsets. Our work demonstrates an association between effector populations of γδ T cells and acute COVID-19 in unvaccinated individuals.

Keywords: COVID-19; SARS-CoV-2; Vδ1 T cells; Vδ2 T cells; γδ T cells.

Publication types

  • Research Support, N.I.H., Intramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acute Disease
  • COVID-19*
  • Humans
  • Receptors, Antigen, T-Cell, gamma-delta
  • SARS-CoV-2
  • T-Lymphocyte Subsets*

Substances

  • Receptors, Antigen, T-Cell, gamma-delta