Electrophilic properties of itaconate and derivatives regulate the IκBζ-ATF3 inflammatory axis

Monika Bambouskova, Laurent Gorvel, Vicky Lampropoulou, Alexey Sergushichev, Ekaterina Loginicheva, Kendall Johnson, Daniel Korenfeld, Mary Elizabeth Mathyer, Hyeryun Kim, Li Hao Huang, Dustin Duncan, Howard Bregman, Abdurrahman Keskin, Andrea Santeford, Rajendra S. Apte, Raghav Sehgal, Britney Johnson, Gaya K. Amarasinghe, Miguel P. Soares, Takashi SatohShizuo Akira, Tsonwin Hai, Cristina De Guzman Strong, Karine Auclair, Thomas P. Roddy, Scott A. Biller, Marko Jovanovic, Eynav Klechevsky, Kelly M. Stewart, Gwendalyn J. Randolph, Maxim N. Artyomov

Research output: Contribution to journalArticlepeer-review

227 Scopus citations

Abstract

Metabolic regulation has been recognized as a powerful principle guiding immune responses. Inflammatory macrophages undergo extensive metabolic rewiring 1 marked by the production of substantial amounts of itaconate, which has recently been described as an immunoregulatory metabolite 2. Itaconate and its membrane-permeable derivative dimethyl itaconate (DI) selectively inhibit a subset of cytokines 2, including IL-6 and IL-12 but not TNF. The major effects of itaconate on cellular metabolism during macrophage activation have been attributed to the inhibition of succinate dehydrogenase 2,3, yet this inhibition alone is not sufficient to account for the pronounced immunoregulatory effects observed in the case of DI. Furthermore, the regulatory pathway responsible for such selective effects of itaconate and DI on the inflammatory program has not been defined. Here we show that itaconate and DI induce electrophilic stress, react with glutathione and subsequently induce both Nrf2 (also known as NFE2L2)-dependent and-independent responses. We find that electrophilic stress can selectively regulate secondary, but not primary, transcriptional responses to toll-like receptor stimulation via inhibition of IκBζ protein induction. The regulation of IκBζ is independent of Nrf2, and we identify ATF3 as its key mediator. The inhibitory effect is conserved across species and cell types, and the in vivo administration of DI can ameliorate IL-17-IκBζ-driven skin pathology in a mouse model of psoriasis, highlighting the therapeutic potential of this regulatory pathway. Our results demonstrate that targeting the DI-IκBζ regulatory axis could be an important new strategy for the treatment of IL-17-IκBζ-mediated autoimmune diseases.

Original languageEnglish
Pages (from-to)501-504
Number of pages4
JournalNature
Volume556
Issue number7702
DOIs
StatePublished - Apr 26 2018

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