Perturbation of azurophilic granule integrity drives NLRP3-independent IL-1β processing and release in neutrophils

Interleukin 1-beta (IL-1β) is an inflammatory cytokine produced by myeloid cells in response to infection or sterile tissue damage. Secretion of bioactive IL-1β from macrophages (Mφ) or dendritic cells (DC) downstream of activated NLRP3/caspase-1 inflammasomes is the best characterized model; this is mediated by caspase-1 cleavage of proIL-1β and Gasdermin D. Gasdermin D pores that form in the plasma membrane mediate IL-1β release and pyroptotic cell death. NLRP3 inflammasome assembly is trigger