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Alfaro, A.J. ; Dittner, C.* ; Becker, J.* ; Loft, A. ; Mhamane, A. ; Maida, A. ; Georgiadi, A. ; Tsokanos, F.-F. ; Klepac, K. ; Molocea, C.-E. ; El-Merahbi, R. ; Motzler, K. ; Geppert, J. ; Karikari, R.A. ; Szendrödi, J.* ; Feuchtinger, A. ; Hofmann, S.M. ; Karaca, S.* ; Urlaub, H.* ; Berriel Diaz, M. ; Melchior, F.* ; Herzig, S.

Fasting-sensitive SUMO-switch on Prox1 controls hepatic cholesterol metabolism.

EMBO Rep. 24:e55981 (2023)
Publ. Version/Full Text DOI PMC
Open Access Gold (Paid Option)
Creative Commons Lizenzvertrag
Accumulation of excess nutrients hampers proper liver function and is linked to nonalcoholic fatty liver disease (NAFLD) in obesity. However, the signals responsible for an impaired adaptation of hepatocytes to obesogenic dietary cues remain still largely unknown. Post-translational modification by the small ubiquitin-like modifier (SUMO) allows for a dynamic regulation of numerous processes including transcriptional reprogramming. We demonstrate that specific SUMOylation of transcription factor Prox1 represents a nutrient-sensitive determinant of hepatic fasting metabolism. Prox1 is highly SUMOylated on lysine 556 in the liver of ad libitum and refed mice, while this modification is abolished upon fasting. In the context of diet-induced obesity, Prox1 SUMOylation becomes less sensitive to fasting cues. The hepatocyte-selective knock-in of a SUMOylation-deficient Prox1 mutant into mice fed a high-fat/high-fructose diet leads to a reduction of systemic cholesterol levels, associated with the induction of liver bile acid detoxifying pathways during fasting. The generation of tools to maintain the nutrient-sensitive SUMO-switch on Prox1 may thus contribute to the development of "fasting-based" approaches for the preservation of metabolic health.
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Publication type Article: Journal article
Document type Scientific Article
Corresponding Author
Keywords Bile Acids ; Cholesterol ; Liver ; Prox1 ; Sumoylation; Homeobox Protein Prox1; Bile-acid; Nuclear Receptors; Mammalian-cells; Sumoylation; Liver; Transcription; Mechanisms; Expression; Corepressor
ISSN (print) / ISBN 1469-221X
e-ISSN 1469-3178
Journal EMBO Reports
Quellenangaben Volume: 24, Issue: 10, Pages: , Article Number: e55981 Supplement: ,
Publisher EMBO Press
Publishing Place 111 River St, Hoboken 07030-5774, Nj Usa
Non-patent literature Publications
Reviewing status Peer reviewed
Institute(s) Institute of Diabetes and Cancer (IDC)
Research Unit Analytical Pathology (AAP)
Institute of Diabetes and Regeneration Research (IDR)
Grants Open Access funding enabled and organized by Projekt DEAL
DKFZ-ZMBH Alliance
Edith-Haberland-Wagner Stiftung