%0 Unpublished work %T Mtfp1 ablation enhances mitochondrial respiration and protects against hepatic steatosis %+ Biologie mitochondriale – Mitochondrial biology %+ Biomics (plateforme technologique) %+ Hub Bioinformatique et Biostatistique - Bioinformatics and Biostatistics HUB %+ Plateforme de Protéomique / Proteomics platform %+ Plate-forme de bioimagerie ultrastructurale - Ultrastructural BioImaging Core Facility %+ Structure Fédérative de Recherche Necker (SFR Necker - UMS 3633 / US24) %+ University of Melbourne %A Patitucci, Cecilia %A Hernández-Camacho, Juan Diego %A Vimont, Elodie %A Cokelaer, Thomas %A Chaze, Thibault %A Giai Gianetto, Quentin %A Matondo, Mariette %A Gazi, Anastasia %A Nemazanyy, Ivan %A Stroud, David, A %A Hock, Daniella, H %A Donnarumma, Erminia %A Wai, Timothy %Z T.W. is supported by the European Research Council (ERC) Starting Grant No. 714472 (Acronym “Mitomorphosis”) and the Agence Nationale pour la Recherche (ANR-20-CE14-0039-02). D.A.S and D.H.H are supported by grants from the Australian National Health and Medical Research Council (GNT2009732) and Medical Research Future Fund (MRF2016030). %8 2023-04-28 %D 2023 %R 10.1101/2023.04.26.538374 %K mitochondria %K liver %K steatosis %K NAFLD %K oxidative phosphorylation %Z Life Sciences [q-bio]Preprints, Working Papers, ... %X Hepatic steatosis is the result of an imbalance between nutrient delivery and metabolism in the liver. It is the first hallmark of Non-alcoholic fatty liver disease (NAFLD) and is characterized by the accumulation of excess lipids in the liver that can drive liver failure, inflammation, and cancer. Mitochondria control the fate and function of cells and compelling evidence implicates these multifunctional organelles in the appearance and progression of liver dysfunction, although it remains to be elucidated which specific mitochondrial functions are actually causally linked to NAFLD. Here, we identified Mitochondrial Fission Process 1 protein (MTFP1) as a key regulator of mitochondrial and metabolic activity in the liver. Deletion of Mtfp1 in hepatocytes is physiologically benign in mice yet leads to the upregulation of oxidative phosphorylation (OXPHOS) activity and mitochondrial respiration, independently of mitochondrial biogenesis. Consequently, hepatocyte-specific knockout mice are protected against high fat diet-induced hepatic steatosis and metabolic dysregulation. Additionally, we find that deletion of Mtfp1 in liver mitochondria inhibits mitochondrial permeability transition pore opening in hepatocytes, conferring protection against apoptotic liver damage in vivo and ex vivo. Our work uncovers novel functions of MTFP1 in the liver, positioning this gene as an unexpected regulator of OXPHOS and a therapeutic candidate for NAFLD. %G English %2 https://pasteur.hal.science/pasteur-04093359/document %2 https://pasteur.hal.science/pasteur-04093359/file/2023.04.26.538374v1.full.pdf %L pasteur-04093359 %U https://pasteur.hal.science/pasteur-04093359 %~ INSERM %~ PASTEUR %~ CNRS %~ APHP %~ OPENAIRE %~ INC-CNRS %~ UNIV-PARIS %~ UNIVERSITE-PARIS %~ ANR %~ TEST2-HALCNRS %~ MITOCHONDRIAL-BIOLOGY %~ UMR3691 %~ FRANCE-GENOMIQUE %~ BIOMICS_IP %~ BIOINFO_BIOSTAT_HUB