Selected article for: "acute respiratory distress syndrome and local inflammation"
Author: Jouan, Youenn; Guillon, Antoine; Gonzalez, Loïc; Perez, Yonatan; Boisseau, Chloé; Ehrmann, Stephan; Ferreira, Marion; Daix, Thomas; Jeannet, Robin; François, Bruno; Dequin, Pierre-François; Si-Tahar, Mustapha; Baranek, Thomas; Paget, Christophe
Title: Phenotypical and functional alteration of unconventional T cells in severe COVID-19 patients
  • Cord-id: omypem3c
  • Document date: 2020_9_4
    • ID: omypem3c
    Snippet: 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, γδT, and iNKT cells) with potent antimicrobial and regu
    Document: 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, γδT, 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.

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