1. Critically Ill Coronavirus Disease 2019 Patients Exhibit Hyperactive Cytokine Responses Associated With Effector Exhausted Senescent T Cells in Acute Infection.
- Author
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Arcanjo, Angélica, Pinto, Kamila Guimarães, Logullo, Jorgete, Leite, Paulo Emílio Corrêa, Menezes, Camilla Cristie Barreto, Freire-de-Lima, Leonardo, Diniz-Lima, Israel, Decoté-Ricardo, Debora, Rodrigues-da-Silva, Rodrigo Nunes, Freire-de-Lima, Celio Geraldo, Filardy, Alessandra Almeida, Lima-Junior, Josué da Costa, Bertho, Alvaro Luiz, Luca, Paula Mello De, Granjeiro, José Mauro, Barroso, Shana Priscila Coutinho, Conceição-Silva, Fátima, Savino, Wilson, Morrot, Alexandre, and De Luca, Paula Mello
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COVID-19 , *T cells , *CYTOKINES , *CRITICALLY ill , *CYTOKINE release syndrome - Abstract
Background: Coronavirus disease 2019 (COVID-19) can progress to severe pneumonia with respiratory failure and is aggravated by the deregulation of the immune system causing an excessive inflammation including the cytokine storm.Methods: In this study, we report that severe acutely infected patients have high levels of both type-1 and type-2 cytokines.Results: Our results show abnormal cytokine levels upon T-cell stimulation, in a nonpolarized profile. Furthermore, our findings indicate that this hyperactive cytokine response is associated with a significantly increased frequency of late-differentiated T cells with particular phenotype of effector exhausted/senescent CD28-CD57+ cells. Of note, we demonstrated for the first time an increased frequency of CD3+CD4+CD28-CD57+ T cells with expression of programmed death 1, one of the hallmarks of T-cell exhaustion.Conclusions: These findings reveal that COVID-19 is associated with acute immunodeficiency, especially within the CD4+ T-cell compartment, and points to possible mechanisms of loss of clonal repertoire and susceptibility to viral relapse and reinfection events. [ABSTRACT FROM AUTHOR]- Published
- 2021
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