title: Histones trigger sterile inflammation by activating the NLRP3 inflammasome.
abstract: Sterile cell death mediated inflammation is linked to several pathological disorders and involves danger recognition of intracellular molecules released by necrotic cells that activate different groups of innate pattern recognition receptors. Toll-like receptors directly interact with their extrinsic or intrinsic agonists and induce multiple proinflammatory mediators. In contrast, the NLRP3 inflammasome is rather thought to represent a downstream element integrating various indirect stimuli into proteolytic cleavage of interleukin (IL)-1β and IL-18. Here, we report that histones released from necrotic cells induce IL-1β secretion in an NLRP3-ASC-caspase-1-dependent manner. Genetic deletion of NLRP3 in mice significantly attenuated histone-induced IL-1β production and neutrophil recruitment. Furthermore, necrotic cells induced neutrophil recruitment, which was significantly reduced by histone-neutralizing antibodies or depleting extracellular histones via enzymatic degradation. These results identify cytosolic uptake of necrotic cell-derived histones as a triggering mechanism of sterile inflammation, which involves NLRP3 inflammasome activation and IL-1β secretion via oxidative stress.
authors: Department of Biochemistry, University of Lausanne, Epalinges, Switzerland.
authors: Ramanjaneyulu
authors: R
authors: Allam
authors: Murthy Narayana
authors: MN
authors: Darisipudi
authors: Jurg
authors: J
authors: Tschopp
authors: Hans-Joachim
authors: HJ
authors: Anders
mesh_terms: D000818:Animals; D057134:Antibodies, Neutralizing / Q000276:immunology / Q000494:pharmacology; D051017:Apoptosis Regulatory Proteins; D053468:CARD Signaling Adaptor Proteins; D002352:Carrier Proteins / Q000235:genetics / Q000276:immunology*; D020170:Caspase 1 / Q000235:genetics / Q000276:immunology; D003598:Cytoskeletal Proteins / Q000235:genetics / Q000276:immunology; D017353:Gene Deletion; D006657:Histones / Q000037:antagonists & inhibitors / Q000276:immunology*; D058847:Inflammasomes / Q000235:genetics / Q000276:immunology*; D007249:Inflammation / Q000235:genetics / Q000276:immunology / Q000473:pathology; D020382:Interleukin-18 / Q000235:genetics / Q000276:immunology; D053583:Interleukin-1beta / Q000235:genetics / Q000276:immunology; D051379:Mice; D018345:Mice, Knockout; D000071199:NLR Family, Pyrin Domain-Containing 3 Protein; D009336:Necrosis / Q000235:genetics / Q000276:immunology / Q000473:pathology; D009504:Neutrophils / Q000276:immunology* / Q000473:pathology; D018384:Oxidative Stress / Q000187:drug effects / Q000235:genetics / Q000276:immunology*; D059748:Proteolysis / Q000187:drug effects
chemical_list: D057134:Antibodies, Neutralizing; D051017:Apoptosis Regulatory Proteins; D053468:CARD Signaling Adaptor Proteins; D002352:Carrier Proteins; D003598:Cytoskeletal Proteins; D006657:Histones; D058847:Inflammasomes; D020382:Interleukin-18; D053583:Interleukin-1beta; D000071199:NLR Family, Pyrin Domain-Containing 3 Protein; C492716:Nlrp3 protein, mouse; C498534:Pycard protein, mouse; D020170:Caspase 1
keywords: Histones; Inflammasome; Interleukin‐1; NLRP3; Sterile inflammation