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The role of the NLRP3 inflammasome in gout

Authors Sarah R Kingsbury, Philip G Conaghan, Michael F McDermott

Published 13 March 2011 Volume 2011:4 Pages 39—49


Review by Single-blind

Peer reviewer comments 5

Sarah R Kingsbury1,2, Philip G Conaghan1,2, Michael F McDermott1,2
1Section of Musculoskeletal Disease, Leeds Institute of Molecular Medicine 2NIHR Leeds Musculoskeletal Biomedical Research Unit, Leeds Institute of Molecular Medicine, University of Leeds, Leeds, UK

Abstract: Gout is an inflammatory arthritis characterized by abrupt self-limiting attacks of inflammation caused by precipitation of monosodium urate crystals (MSU) in the joint. Recent studies suggest that orchestration of the MSU-induced inflammatory response is dependent on the proinflammatory cytokine IL-1ß, underlined by promising results in early IL-1 inhibitor trials in gout patients. This IL-1-dependent innate inflammatory phenotype, which is observed in a number of diseases in addition to gout, is now understood to rely on the formation of the macromolecular NLRP3 inflammasome complex in response to the MSU 'danger signal'. This review focuses on our current understanding of the NLRP3 inflammasome and its critical role in MSU-crystal induced inflammatory gout attacks. It also discusses the management of treatment-resistant acute and chronic tophaceous gout with IL-1 inhibitors; early clinical studies of rilonacept (IL-1 Trap), canakinumab (monoclonal anti-IL-1ß antibody), and anakinra have all demonstrated treatment efficacy in such patients.

Keywords: gout, inflammasome, NLRP3, IL-1

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