Type I interferon antagonism of the JMJD3-IRF4 pathway modulates macrophage activation and polarization

Cell Rep. 2022 Apr 19;39(3):110719. doi: 10.1016/j.celrep.2022.110719.

Abstract

Metabolic adaptations can directly influence the scope and scale of macrophage activation and polarization. Here we explore the impact of type I interferon (IFNβ) on macrophage metabolism and its broader impact on cytokine signaling pathways. We find that IFNβ simultaneously increased the expression of immune-responsive gene 1 and itaconate production while inhibiting isocitrate dehydrogenase activity and restricting α-ketoglutarate accumulation. IFNβ also increased the flux of glutamine-derived carbon into the tricarboxylic acid cycle to boost succinate levels. Combined, we identify that IFNβ controls the cellular α-ketoglutarate/succinate ratio. We show that by lowering the α-ketoglutarate/succinate ratio, IFNβ potently blocks the JMJD3-IRF4-dependent pathway in GM-CSF and IL-4 activated macrophages. The suppressive effects of IFNβ on JMJD3-IRF4-dependent responses, including M2 polarization and GM-CSF-induced inflammatory pain, were reversed by supplementation with α-ketoglutarate. These results reveal that IFNβ modulates macrophage activation and polarization through control of the cellular α-ketoglutarate/succinate ratio.

Keywords: CP: Immunology; CP: Metabolism; granulocyte macrophage colony-stimulating factor; interleukin-4; isocitrate dehydrogenase; macrophage polarization; metabolism; succinate; type I interferon; α-ketoglutarate.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Granulocyte-Macrophage Colony-Stimulating Factor / genetics
  • Interferon Type I*
  • Ketoglutaric Acids / metabolism
  • Ketoglutaric Acids / pharmacology
  • Macrophage Activation*
  • Succinic Acid

Substances

  • Interferon Type I
  • Ketoglutaric Acids
  • Granulocyte-Macrophage Colony-Stimulating Factor
  • Succinic Acid