European Mast Cell and
Basophil Research Network

A granulocytic signature identifies COVID-19 and its severity

Summary

Unsupervised mapping of leukocyte surface markers identified a granulocytic COVID-19 signature comprising eosinophil and basophil CRTH2 downregulation, increased counts of CD15+CD16+ neutrophils, and decreased granulocytic CD11b expression, while PDL1 checkpoint expression in basophils and eosinophils was associated with severity.

Citation

A granulocytic signature identifies COVID-19 and its severity. Vitte J, Diallo AB, Boumaza A, Lopez A, Michel M, Allardet-Servent J, Mezouar S, Sereme Y, Busnel JM, Miloud T, Malergue F, Morange PE, Halfon P, Olive D, Leone M, Mege JL. J Infect Dis. 2020 Sep 17:jiaa591. doi: 10.1093/infdis/jiaa591. Online ahead of print. PMID: 32941618

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Recording: 1st EMBRN webinar 2025

1st EMBRN webinar took place on October 8, 2025. This event highlights exciting new research on mast cells and skin immunity. Thomas Plum was our keynote speaker