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Distinctive Dynamics and Functions of the CD4+CD25+FOXP3+ Regulatory T Cell Population in Patients with Severe and Mild COVID-19

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Title
Distinctive Dynamics and Functions of the CD4+CD25+FOXP3+ Regulatory T Cell Population in Patients with Severe and Mild COVID-19
Author(s)
Hee Jin Nam; Koh, J.-Y.; Jung, J.H.; Jeong, H.; Jeong, H.W.; Cheon, S.; Park, S.-H.; Kim, Y.-S.; Eui Cheol Shin
Publication Date
2023-06
Journal
Journal of Immunology, v.210, no.11, pp.1687 - 1699
Publisher
American Association of Immunologists
Abstract
Although CD4+CD25+FOXP3+ regulatory T (TREG) cells have been studied in patients with COVID-19, changes in the TREG cell population have not been longitudinally examined during the course of COVID-19. In this study, we longitudinally investigated the quantitative and qualitative changes in the TREG cell population in patients with COVID-19. We found that the frequencies of total TREG cells and CD45RA-FOXP3hi activated TREG cells were significantly increased 15-28 d postsymptom onset in severe patients, but not in mild patients. TREG cells from severe patients exhibited not only increased proliferation but also enhanced apoptosis, suggesting functional derangement of the TREG cell population during severe COVID-19. The suppressive functions of the TREG cell population did not differ between patients with severe versus mild COVID-19. The frequency of TREG cells inversely correlated with SARS-CoV-2-specific cytokine production by CD4+ T cells and their polyfunctionality in patients with mild disease, suggesting that TREG cells are major regulators of virus-specific CD4+ T cell responses during mild COVID-19. However, such correlations were not observed in patients with severe disease. Thus, in this study, we describe distinctive changes in the TREG cell population in patients with severe and mild COVID-19. Our study provides a deep understanding of host immune responses upon SARS-CoV-2 infection in regard to TREG cells. Copyright © 2023 by The American Association of Immunologists, Inc.
URI
https://pr.ibs.re.kr/handle/8788114/13834
DOI
10.4049/jimmunol.2200290
ISSN
0022-1767
Appears in Collections:
Korea Virus Research Institute(한국바이러스기초연구소) > Center for Viral Immunology(바이러스 면역 연구센터) > 1. Journal Papers (저널논문)
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