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Updated: Mar 15, 2026

Monitoring eIF4F Assembly by Measuring eIF4E-eIF4G Interaction in Live Cells
Published on: May 1, 2020
E4F1 controls a transcriptional program essential for pyruvate dehydrogenase activity
Matthieu Lacroix1, Geneviève Rodier2, Olivier Kirsh3
1Institut de Recherche en Cancérologie de Montpellier, Montpellier F-34298, France; INSERM, U1194, Montpellier F-34298, France; Université Montpellier, Montpellier F-34090, France; Institut du Cancer Montpellier, Montpellier F-34298, France; Equipe labellisée Ligue Contre le Cancer, 75013 Paris, France;
The transcription factor E4F1 is a master regulator of the pyruvate dehydrogenase complex (PDC), controlling key genes for pyruvate oxidation. E4F1 dysfunction causes severe metabolic defects, mimicking symptoms in patients with PDC deficiencies.
Area of Science:
- Biochemistry
- Metabolic Regulation
- Molecular Biology
Background:
- The mitochondrial pyruvate dehydrogenase complex (PDC) is crucial for energy metabolism by oxidizing pyruvate.
- Dysregulation of PDC is linked to various human metabolic syndromes.
Purpose of the Study:
- To investigate the role of E4F1 transcription factor in regulating pyruvate oxidation.
- To understand the impact of E4F1 dysfunction on PDC activity and metabolic pathways.
Main Methods:
- Genetic inactivation of murine E4f1 in striated muscles.
- Assessing PDH activity, pyruvate metabolism, and physiological phenotypes.
- Evaluating therapeutic interventions like PDH stimulation and ketogenic diet.
Main Results:
- E4F1 controls four genes essential for pyruvate oxidation (Dlat, Dld, Mpc1, Slc25a19).
- E4F1 deficiency led to an 80% decrease in PDH activity and altered pyruvate metabolism.
- Mice lacking E4f1 exhibited low muscle PDH activity, endurance defects, and lactic acidemia.
Conclusions:
- E4F1 acts as a master regulator of the PDC.
- E4F1 dysfunction recapitulates clinical symptoms of PDC deficiencies.
- Pharmacological and dietary interventions can ameliorate E4F1 deficiency phenotypes.
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