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Immunology

Indica Labs / Immunology

Association of COVID-19 inflammation with activation of the C5a–C5aR1 axis

Julien Carvelli, et al, Nature, 2020
Researchers aiming to block excessive lung inflammation in COVID-19 patients found upregulated immune checkpoint biomarkers in patients with a range of COVID-19 symptoms (from paucisymptomatic to acute respiratory distress syndrome). In addition, Carvelli et al found increased expression of C5a, an inflammatory mediator, in serum and the C5aR1 receptor on myeloid cells in COVID-19 patients, which are known to initiate inflammatory responses by recruiting neutrophils and monocytes to lungs. An in vitro neutrophil...