A Defective Pentose Phosphate Pathway Reduces Inflammatory Macrophage Responses during Hypercholesterolemia

Jeroen Baardman, Sanne G S Verberk, Koen H M Prange, Michel van Weeghel, Saskia van der Velden, Dylan G Ryan, Rob C I Wüst, Annette E Neele, Dave Speijer, Simone W Denis, Maarten E Witte, Riekelt H Houtkooper, Luke A O'neill, Elena V Knatko, Albena T Dinkova-Kostova, Esther Lutgens, Menno P J de Winther, Jan Van den Bossche (Lead / Corresponding author)

    Research output: Contribution to journalArticlepeer-review

    136 Citations (Scopus)
    278 Downloads (Pure)

    Abstract

    Metabolic reprogramming has emerged as a crucial regulator of immune cell activation, but how systemic metabolism influences immune cell metabolism and function remains to be investigated. To investigate the effect of dyslipidemia on immune cell metabolism, we performed in-depth transcriptional, metabolic, and functional characterization of macrophages isolated from hypercholesterolemic mice. Systemic metabolic changes in such mice alter cellular macrophage metabolism and attenuate inflammatory macrophage responses. In addition to diminished maximal mitochondrial respiration, hypercholesterolemia reduces the LPS-mediated induction of the pentose phosphate pathway (PPP) and the Nrf2-mediated oxidative stress response. Our observation that suppression of the PPP diminishes LPS-induced cytokine secretion supports the notion that this pathway contributes to inflammatory macrophage responses. Overall, this study reveals that systemic and cellular metabolism are strongly interconnected, together dictating macrophage phenotype and function.

    Original languageEnglish
    Pages (from-to)2044-2052.e5
    Number of pages15
    JournalCell Reports
    Volume25
    Issue number8
    DOIs
    Publication statusPublished - 20 Nov 2018

    Keywords

    • Nrf2
    • atherosclerosis
    • cardiovascular disease
    • foam cells
    • hypercholesterolemia
    • immunometabolism
    • inflammation
    • macrophages
    • meta-inflammation
    • metabolic disease
    • pentose phosphate pathway

    ASJC Scopus subject areas

    • General Biochemistry,Genetics and Molecular Biology

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