Abstract
NLRP3 gene (formerly known as CIAS1) encodes for cryopyrin (Nalp3) protein, which belongs to the Nod-like family of innate immune receptors. Cryopyrin recruits different adaptor and effectors proteins into a cytosolic macromolecular complex termed Nalp3-inflammasome, which senses both several pathogen-associated and damage-associated molecular patterns as well as inorganic particles (asbestos, silica), and triggers innate immune and inflammatory responses. Gain-of-function NLRP3 mutations are the common molecular basis of cryopyrin-associated periodic syndromes (CAPS), which encompasses three clinical entities along a spectrum of disease severity (familial cold autoinflammatory syndrome, Muckle-Wells syndrome and CINCA-NOMID syndrome). This hypermorphic cryopyrin provokes an increased, unregulated secretion of different inflammatory cytokines (IL-1β, IL-18, IL-33) in patients with CAPS, and in vivo administration of IL-1 blocking agents results in excellent therapeutic responses in these patients.
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