Frontiers in Bioscience-Landmark (FBL) is published by IMR Press from Volume 26 Issue 5 (2021). Previous articles were published by another publisher on a subscription basis, and they are hosted by IMR Press on imrpress.com as a courtesy and upon agreement with Frontiers in Bioscience.
Academic Editor: Oliver Soehnlein
The serine proteases cathepsin G, human leukocyte elastase and proteinase 3 are major contents of neutrophil granulocytes and are released at sites of inflammation. Although the traditional function of neutrophil-derived antimicrobial proteases is to ingest and kill bacteria, recent studies provided evidence that these proteases are able to activate specifically pro-inflammatory cytokines including interleukin-1 beta and TNF-alpha and lead to the activation of different receptors including epidermal growth factor receptor and proteinase-activated receptors. Neutrophil serine proteases might therefore be important regulators of the inflammatory innate immune response and are interesting targets for new therapeutic approaches against inflammatory disorders. This review summarizes the current knowledge on the molecular regulation of the innate immune response by neutrophil-derived serine proteases.