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Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 J+Exp+Med 2020 ; 217 (12): ä Nephropedia Template TP
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Phenotypical and functional alteration of unconventional T cells in severe COVID-19 patients #MMPMID32886755
Jouan Y; Guillon A; Gonzalez L; Perez Y; Boisseau C; Ehrmann S; Ferreira M; Daix T; Jeannet R; Francois B; Dequin PF; Si-Tahar M; Baranek T; Paget C
J Exp Med 2020[Dec]; 217 (12): ä PMID32886755show ga
COVID-19 includes lung infection ranging from mild pneumonia to life-threatening acute respiratory distress syndrome (ARDS). Dysregulated host immune response in the lung is a key feature in ARDS pathophysiology. However, cellular actors involved in COVID-19-driven ARDS are poorly understood. Here, in blood and airways of severe COVID-19 patients, we serially analyzed unconventional T cells, a heterogeneous class of T lymphocytes (MAIT, gammadeltaT, and iNKT cells) with potent antimicrobial and regulatory functions. Circulating unconventional T cells of COVID-19 patients presented with a profound and persistent phenotypic alteration. In the airways, highly activated unconventional T cells were detected, suggesting a potential contribution in the regulation of local inflammation. Finally, expression of the CD69 activation marker on blood iNKT and MAIT cells of COVID-19 patients on admission was predictive of clinical course and disease severity. Thus, COVID-19 patients present with an altered unconventional T cell biology, and further investigations will be required to precisely assess their functions during SARS-CoV-2-driven ARDS.