Acute Deletion of the Glucocorticoid Receptor in Hepatocytes Disrupts Postprandial Lipid Metabolism in Male Mice

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  • Catarina Mendes Correia
  • Stine Marie Præstholm
  • Jesper Foged Havelund
  • Boel, Felix
  • Majken Storm Siersbæk
  • Morten Frendø Ebbesen
  • Gerhart-Hines, Zach
  • Joerg Heeren
  • Jonathan Brewer
  • Larsen, Steen
  • Blagoy Blagoev
  • Nils Joakim Færgeman
  • Lars Grøntved
Hepatic lipid metabolism is highly dynamic, and disruption of several circadian transcriptional regulators results in hepatic steatosis. This includes genetic disruption of the glucocorticoid receptor (GR) as the liver develops. To address the functional role of GR in the adult liver, we used an acute hepatocyte-specific GR knockout model to study temporal hepatic lipid metabolism governed by GR at several preprandial and postprandial circadian timepoints. Lipidomics analysis revealed significant temporal lipid metabolism, where GR disruption results in impaired regulation of specific triglycerides, nonesterified fatty acids, and sphingolipids. This correlates with increased number and size of lipid droplets and mildly reduced mitochondrial respiration, most noticeably in the postprandial phase. Proteomics and transcriptomics analyses suggest that dysregulated lipid metabolism originates from pronounced induced expression of enzymes involved in fatty acid synthesis, β-oxidation, and sphingolipid metabolism. Integration of GR cistromic data suggests that induced gene expression is a result of regulatory actions secondary to direct GR effects on gene transcription.
OriginalsprogEngelsk
Artikelnummer164
TidsskriftEndocrinology
Vol/bind164
Udgave nummer10
Sider (fra-til)1-17
ISSN0013-7227
DOI
StatusUdgivet - 2023

Bibliografisk note

© The Author(s) 2023. Published by Oxford University Press on behalf of the Endocrine Society. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

ID: 367906842