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NLRP3 activation and mitosis are mutually exclusive events coordinated by NEK7, a new inflammasome component #MMPMID26642356
Shi H; Wang Y; Li X; Zhan X; Tan M; Fina M; Su L; Pratt D; Bu CH; Hildebrand S; Lyon S; Scott L; Quan J; Sun Q; Russell J; Arnett S; Jurek P; Chen D; Kravchenko VV; Mathison JC; Moresco EMY; Monson NL; Ulevitch RJ; Beutler B
Nat Immunol 2016[Mar]; 17 (3): 250-8 PMID26642356show ga
The NLRP3 inflammasome responds to microbes and danger signals by processing and activating proinflammatory cytokines including IL-1? and IL-18. We show that NLRP3 inflammasome activation is restricted to interphase of the cell cycle by NEK7, a serine/threonine kinase previously implicated in mitosis. NLRP3 inflammasome activation requires NEK7, which binds to the NLRP3 leucine-rich repeat domain in a kinase-independent manner downstream from the induction of mitochondrial ROS. This interaction is necessary for NLRP3-ASC complex formation, ASC oligomerization, and caspase-1 activation. NEK7 promotes the NLRP3-dependent cellular inflammatory response to intraperitoneal monosodium urate challenge, and the development of experimental autoimmune encephalitis in mice. Our findings suggest NEK7 serves as a cellular switch that enforces mutual exclusivity between the inflammasome response and cell division.