1. Blocking fatty acid-fueled mROS production within macrophages alleviates acute gouty inflammation
- Author
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Hall, Christopher J., Sanderson, Leslie E., Lawrence, Lisa M., Pool, Bregina, van der Kroef, Maarten, Ashimbayeva, Elina, Britto, Denver, Harper, Jacquie L., Lieschke, Graham J., Astin, Jonathan W., Crosier, Kathryn E., Dalbeth, Nicola, and Crosier, Philip S.
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Genetic aspects ,Research ,Risk factors ,Gout -- Risk factors -- Genetic aspects -- Research ,Reactive oxygen species -- Research - Abstract
Introduction Gout, the most common inflammatory arthritis in men (1), is a prototypic acute sterile inflammatory disease. Hyperuricemia leading to monosodium urate (MSU) crystal deposition triggers recurrent attacks of acute [...], Gout is the most common inflammatory arthritis affecting men. Acute gouty inflammation is triggered by monosodium urate (MSU) crystal deposition in and around joints that activates macrophages into a proinflammatory state, resulting in neutrophil recruitment. A complete understanding of how MSU crystals activate macrophages in vivo has been difficult because of limitations of live imaging this process in traditional animal models. By live imaging the macrophage and neutrophil response to MSU crystals within an intact host (larval zebrafish), we reveal that macrophage activation requires mitochondrial ROS (mROS) generated through fatty acid oxidation. This mitochondrial source of ROS contributes to NF-[kappa]B-driven production of IL-1[beta] and TNF-[alpha], which promote neutrophil recruitment. We demonstrate the therapeutic utility of this discovery by showing that this mechanism is conserved in human macrophages and, via pharmacologic blockade, that it contributes to neutrophil recruitment in a mouse model of acute gouty inflammation. To our knowledge, this study is the first to uncover an immunometabolic mechanism of macrophage activation that operates during acute gouty inflammation. Targeting this pathway holds promise in the management of gout and, potentially, other macrophage-driven diseases.
- Published
- 2018
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