摘要：SummaryTranscription factor nuclear factor erythroid 2 p45-related factor 2 (Nrf2) and its main negative regulator, Kelch-like ECH-associated protein 1 (Keap1), are at the interface between redox and intermediary metabolism, allowing adaptation and survival under conditions of oxidative, inflammatory, and metabolic stress. Nrf2 is the principal determinant of redox homeostasis, and contributes to mitochondrial function and integrity and cellular bioenergetics. Using proteomics and lipidomics, we show that genetic downregulation of Keap1 in mice, and the consequent Nrf2 activation to pharmacologically relevant levels, leads to upregulation of carboxylesterase 1 (Ces1) and acyl-CoA oxidase 2 (Acox2), decreases triglyceride levels, and alters the lipidome. This is accompanied by downregulation of hepatic ATP-citrate lyase (Acly) and decreased levels of acetyl-CoA, a trigger for autophagy. These findings suggest that downregulation of Keap1 confers features of a fasted metabolic state, which is an important consideration in the drug development of Keap1-targeting pharmacologic Nrf2 activators.Graphical AbstractDisplay OmittedHighlights•Keap1 downregulation in mice increases Ces1 and Acox2 and decreases triglyceride levels•Genetic interference with Keap1/Nrf2 alters the murine lipidome•Reduced expression of Keap1 lowers hepatic levels of acetyl-CoA•Deleting constitutively active Nrf2 decreases tubulin acetylation and autophagic fluxHuman Metabolism; Molecular Biology; Omics
