A transient increase of HIF-1α during the G1 phase (G1-HIF) ensures cell survival under nutritional stress.
Journal
Cell death & disease
ISSN: 2041-4889
Titre abrégé: Cell Death Dis
Pays: England
ID NLM: 101524092
Informations de publication
Date de publication:
27 07 2023
27 07 2023
Historique:
received:
25
01
2023
accepted:
17
07
2023
revised:
11
07
2023
medline:
31
7
2023
pubmed:
28
7
2023
entrez:
27
7
2023
Statut:
epublish
Résumé
The family of hypoxia-inducible transcription factors (HIF) is activated to adapt cells to low oxygen conditions, but is also known to regulate some biological processes under normoxic conditions. Here we show that HIF-1α protein levels transiently increase during the G1 phase of the cell cycle (designated as G1-HIF) in an AMP-activated protein kinase (AMPK)-dependent manner. The transient elimination of G1-HIF by a degron system revealed its contribution to cell survival under unfavorable metabolic conditions. Indeed, G1-HIF plays a key role in the cell cycle-dependent expression of genes encoding metabolic regulators and the maintenance of mTOR activity under conditions of nutrient deprivation. Accordingly, transient elimination of G1-HIF led to a significant reduction in the concentration of key proteinogenic amino acids and carbohydrates. These data indicate that G1-HIF acts as a cell cycle-dependent surveillance factor that prevents the onset of starvation-induced apoptosis.
Identifiants
pubmed: 37500648
doi: 10.1038/s41419-023-06012-7
pii: 10.1038/s41419-023-06012-7
pmc: PMC10374543
doi:
Substances chimiques
Hypoxia-Inducible Factor 1, alpha Subunit
0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
477Informations de copyright
© 2023. The Author(s).
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