Itaconate confers tolerance to late NLRP3 inflammasome activation

Monika Bambouskova, Lucie Potuckova, Tomas Paulenda, Martina Kerndl, Denis A. Mogilenko, Kate Lizotte, Amanda Swain, Sebastian Hayes, Ryan D. Sheldon, Hyeryun Kim, Unnati Kapadnis, Abigail E. Ellis, Christine Isaguirre, Samantha Burdess, Anwesha Laha, Gaya K. Amarasinghe, Victor Chubukov, Thomas P. Roddy, Michael S. Diamond, Russell G. JonesDonald M. Simons, Maxim N. Artyomov

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

Itaconate is a unique regulatory metabolite that is induced upon Toll-like receptor (TLR) stimulation in myeloid cells. Here, we demonstrate major inflammatory tolerance and cell death phenotypes associated with itaconate production in activated macrophages. We show that endogenous itaconate is a key regulator of the signal 2 of NLR family pyrin domain containing 3 (NLRP3) inflammasome activation after long lipopolysaccharide (LPS) priming, which establishes tolerance to late NLRP3 inflammasome activation. We show that itaconate acts synergistically with inducible nitric oxide synthase (iNOS) and that the ability of various TLR ligands to establish NLRP3 inflammasome tolerance depends on the pattern of co-expression of IRG1 and iNOS. Mechanistically, itaconate accumulation upon prolonged inflammatory stimulation prevents full caspase-1 activation and processing of gasdermin D, which we demonstrate to be post-translationally modified by endogenous itaconate. Altogether, our data demonstrate that metabolic rewiring in inflammatory macrophages establishes tolerance to NLRP3 inflammasome activation that, if uncontrolled, can result in pyroptotic cell death and tissue damage.

Original languageEnglish
Article number108756
JournalCell Reports
Volume34
Issue number10
DOIs
StatePublished - Mar 9 2021

Keywords

  • immunometabolism
  • inflammasome
  • innate immunity
  • itaconate
  • macrophages

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