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Cardiolipin coordinates inflammatory metabolic reprogramming through regulation of Complex II disassembly and degradation

Authors :
Mack B. Reynolds
Hanna S. Hong
Britton C Michmerhuizen
Anna-Lisa E. Lawrence
Li Zhang
Jason S. Knight
Costas A. Lyssiotis
Basel H. Abuaita
Mary X. O’Riordan
Source :
Science Advances. 9
Publication Year :
2023
Publisher :
American Association for the Advancement of Science (AAAS), 2023.

Abstract

Macrophage metabolic plasticity enables repurposing of electron transport from energy generation to inflammation and host defense. Altered respiratory complex II function has been implicated in cancer, diabetes, and inflammation, but regulatory mechanisms are incompletely understood. Here, we show that macrophage inflammatory activation triggers Complex II disassembly and succinate dehydrogenase subunit B loss through sequestration and selective mitophagy. Mitochondrial fission supported lipopolysaccharide-stimulated succinate dehydrogenase subunit B degradation but not sequestration. We hypothesized that this Complex II regulatory mechanism might be coordinated by the mitochondrial phospholipid cardiolipin. Cardiolipin synthase knockdown prevented lipopolysaccharide-induced metabolic remodeling and Complex II disassembly, sequestration, and degradation. Cardiolipin-depleted macrophages were defective in lipopolysaccharide-induced pro-inflammatory cytokine production, a phenotype partially rescued by Complex II inhibition. Thus, cardiolipin acts as a critical organizer of inflammatory metabolic remodeling.

Subjects

Subjects :
Multidisciplinary

Details

ISSN :
23752548
Volume :
9
Database :
OpenAIRE
Journal :
Science Advances
Accession number :
edsair.doi...........bbb8c045a261a992fa2b9971b7df6369
Full Text :
https://doi.org/10.1126/sciadv.ade8701