Hochschulschrift
Inactivation of Lsd1 triggers senescence in trophoblast stem cells by induction of Sirt4
Abstract: Coordination of energy metabolism is essential for homeostasis of stem cells, whereas an imbalance in energy homeostasis causes disease and accelerated aging. Here we show that deletion or enzymatic inactivation of lysine-specific demethylase 1 (Lsd1) triggers senescence in trophoblast stem cells (TSCs). Genome-wide transcriptional profiling of TSCs following Lsd1 inhibition shows gene set enrichment of aging and metabolic pathways. Consistently, global metabolomic and phenotypic analyses disclose an unbalanced redox status, decreased glutamine anaplerosis and mitochondrial function. Loss of homeostasis is caused by increased expression of sirtuin 4 (Sirt4), a Lsd1-repressed direct target gene. Accordingly, Sirt4 overexpression in wild-type TSCs recapitulates the senescence phenotype initiated by Lsd1 deletion or inhibition. Inversely, absence of Lsd1 enzymatic activity concomitant with knockdown of Sirt4 reestablishes normal glutamine anaplerosis, redox balance and mitochondrial function. In conclusion, by repression of Sirt4, Lsd1 directs the epigenetic control of TSC immortality via maintenance of metabolic flexibility
- Location
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Deutsche Nationalbibliothek Frankfurt am Main
- Extent
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Online-Ressource
- Language
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Englisch
- Notes
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Cell death & disease. - 8, 2 (2017) , e2631, ISSN: 2041-4889
- Event
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Veröffentlichung
- (where)
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Freiburg
- (who)
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Universität
- (when)
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2019
- Creator
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Castex Armendariz, Maria Josefina
Willmann, Dominica
Kanouni, Toufike
Arrigoni, Laura
Li, Yan
Friedrich, Marcel
Schleicher, Michael
Wöhrle, Simon
Pearson, Mark
Kraut, Norbert
Méret, Michaël
Manke, Thomas
Metzger, Eric
Schüle, Roland
Günther, Thomas
- DOI
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10.1038/cddis.2017.48
- URN
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urn:nbn:de:bsz:25-freidok-1404188
- Rights
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Last update
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25.03.2025, 1:58 PM CET
Data provider
Deutsche Nationalbibliothek. If you have any questions about the object, please contact the data provider.
Object type
- Hochschulschrift
Associated
- Castex Armendariz, Maria Josefina
- Willmann, Dominica
- Kanouni, Toufike
- Arrigoni, Laura
- Li, Yan
- Friedrich, Marcel
- Schleicher, Michael
- Wöhrle, Simon
- Pearson, Mark
- Kraut, Norbert
- Méret, Michaël
- Manke, Thomas
- Metzger, Eric
- Schüle, Roland
- Günther, Thomas
- Universität
Time of origin
- 2019