Cell Reports (Aug 2024)

Type I interferon governs immunometabolic checkpoints that coordinate inflammation during Staphylococcal infection

  • Mack B. Reynolds,
  • Benjamin Klein,
  • Michael J. McFadden,
  • Norah K. Judge,
  • Hannah E. Navarrete,
  • Britton C Michmerhuizen,
  • Dominik Awad,
  • Tracey L. Schultz,
  • Paul W. Harms,
  • Li Zhang,
  • Teresa R. O’Meara,
  • Jonathan Z. Sexton,
  • Costas A. Lyssiotis,
  • J. Michelle Kahlenberg,
  • Mary X. O’Riordan

Journal volume & issue
Vol. 43, no. 8
p. 114607

Abstract

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Summary: Macrophage metabolic plasticity is central to inflammatory programming, yet mechanisms of coordinating metabolic and inflammatory programs during infection are poorly defined. Here, we show that type I interferon (IFN) temporally guides metabolic control of inflammation during methicillin-resistant Staphylococcus aureus (MRSA) infection. We find that staggered Toll-like receptor and type I IFN signaling in macrophages permit a transient energetic state of combined oxidative phosphorylation (OXPHOS) and aerobic glycolysis followed by inducible nitric oxide synthase (iNOS)-mediated OXPHOS disruption. This disruption promotes type I IFN, suppressing other pro-inflammatory cytokines, notably interleukin-1β. Upon infection, iNOS expression peaks at 24 h, followed by lactate-driven Nos2 repression via histone lactylation. Type I IFN pre-conditioning prolongs infection-induced iNOS expression, amplifying type I IFN. Cutaneous MRSA infection in mice constitutively expressing epidermal type I IFN results in elevated iNOS levels, impaired wound healing, vasculopathy, and lung infection. Thus, kinetically regulated type I IFN signaling coordinates immunometabolic checkpoints that control infection-induced inflammation.

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