Bile Acids Control Inflammation and Metabolic Disorder through Inhibition of NLRP3 Inflammasome - PubMed

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• PMID: 27692610
• DOI: 10.1016/j.immuni.2016.09.008

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Bile Acids Control Inflammation and Metabolic Disorder through Inhibition of NLRP3 Inflammasome

Chuansheng Guo et al. Immunity. 2016.

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Erratum in

• Bile Acids Control Inflammation and Metabolic Disorder through Inhibition of NLRP3 Inflammasome.

  Guo C, Xie S, Chi Z, Zhang J, Liu Y, Zhang L, Zheng M, Zhang X, Xia D, Ke Y, Lu L, Wang D. Guo C, et al. Immunity. 2016 Oct 18;45(4):944. doi: 10.1016/j.immuni.2016.10.009. Immunity. 2016. PMID: 27760343 No abstract available.

Abstract

Reciprocal interactions between the metabolic system and immune cells play pivotal roles in diverse inflammatory diseases, but the underlying mechanisms remain elusive. The activation of bile acid-mediated signaling has been linked to improvement in metabolic syndromes and enhanced control of inflammation. Here, we demonstrated that bile acids inhibited NLRP3 inflammasome activation via the TGR5-cAMP-PKA axis. TGR5 bile acid receptor-induced PKA kinase activation led to the ubiquitination of NLRP3, which was associated with the PKA-induced phosphorylation of NLRP3 on a single residue, Ser 291. Furthermore, this PKA-induced phosphorylation of NLRP3 served as a critical brake on NLRP3 inflammasome activation. In addition, in vivo results indicated that bile acids and TGR5 activation blocked NLRP3 inflammasome-dependent inflammation, including lipopolysaccharide-induced systemic inflammation, alum-induced peritoneal inflammation, and type-2 diabetes-related inflammation. Altogether, our study unveils the PKA-induced phosphorylation and ubiquitination of NLRP3 and suggests TGR5 as a potential target for the treatment of NLRP3 inflammasome-related diseases.

Comment in

• PKA Has the Gall to Oppose NLRP3.

  Groß CJ, Groß O. Groß CJ, et al. Immunity. 2016 Oct 18;45(4):707-709. doi: 10.1016/j.immuni.2016.09.019. Immunity. 2016. PMID: 27760332 Review.

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