Cited by 269Mitochondrial Function and PathologyAutophagy in Disease and TherapyAdipose Tissue and Metabolism

Loss of mitochondrial protease OMA1 alters processing of the GTPase OPA1 and causes obesity and defective thermogenesis in mice

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Quirós, Pedro M, Ramsay, Andrew J, Sala, David, Fernández‐Vizarra, Erika, Rodríguez, Francisco, Peinado, Juan R, Fernández‐García, Maria Soledad, Vega, José A +3 more·2012·The EMBO Journal

Abstract

Mitochondria are dynamic subcellular organelles that convert nutrient intermediates into readily available energy equivalents. Optimal mitochondrial function is ensured by a highly evolved quality control system, coordinated by protein machinery that regulates a process of continual fusion and fission. In this work, we provide in vivo evidence that the ATP-independent metalloprotease OMA1 plays an essential role in the proteolytic inactivation of the dynamin-related GTPase OPA1 (optic atrophy 1). We also show that OMA1 deficiency causes a profound perturbation of the mitochondrial fusion-fission equilibrium that has important implications for metabolic homeostasis. Thus, ablation of OMA1 in mice results in marked transcriptional changes in genes of lipid and glucose metabolic pathways and substantial alterations in circulating blood parameters. Additionally, Oma1-mutant mice exhibit an increase in body weight due to increased adipose mass, hepatic steatosis, decreased energy expenditure and impaired thermogenenesis. These alterations are especially significant under metabolic stress conditions, indicating that an intact OMA1-OPA1 system is essential for developing the appropriate adaptive response to different metabolic stressors such as a high-fat diet or cold-shock. This study provides the first description of an unexpected role in energy metabolism for the metalloprotease OMA1 and reinforces the importance of mitochondrial quality control for normal metabolic function.

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Crossref · 10.1038/emboj.2012.70

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Authors
Quirós, P. M., Ramsay, A. J., Sala, D., Fernández‐Vizarra, E., Rodríguez, F., Peinado, J. R., Fernández‐García, M. S., Vega, J. A., Enríquez, J. A., Zorzano, A., & López‐Otín, C.
Affiliations
  • Universidad de Oviedo (ES)
  • Instituto de Salud Carlos III (ES)
  • Universidad de Zaragoza (ES)
Venue
The EMBO Journal
Published
2012-03-20
Volume
31
Issue
9
Pages
2117-2133
ISSN
  • 0261-4189 (ISSN-L)
  • 1460-2075
OpenAlex
W2119434925
Cited by
269
References
56
Citations by year
2026: 14 · 2025: 11 · 2024: 16 · 2023: 18 · 2022: 20 · 2021: 17 · 2020: 26 · 2019: 25 · 2018: 28 · 2017: 15 · 2016: 18 · 2015: 16 · 2014: 20 · 2013: 17 · 2012: 8
FWCI
7.85
Type
journal article
Language
en
Open access
Locations
  • The EMBO Journal (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Zaguan (University of Zaragoza Repository) (publishedVersion)
  • Consultation of the Doctoral Thesis Database (TESEO) (Ministerio de Educación, Cultura y Deporte) (submittedVersion, cc-by-nc-nd)
  • LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) (submittedVersion, cc-by-nc-nd)
  • Padua Research Archive (University of Padova) (submittedVersion)
Funders
European Commission
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
Keywords
OMA1, OPA1, mitochondrial fission, mitochondrial fusion, mitochondrial quality control, metalloproteinases, thermogenesis, obesity, energy expenditure, hepatic steatosis, lipid metabolism, glucose metabolism, metabolic stress, cold exposure, high-fat diet, mitochondrial dynamics
MeSH terms
Animals, Blood Glucose, Embryo, Mammalian, Fibroblasts, Metalloendopeptidases, Mice, Inbred C57BL, Mitochondria, Obesity, Mice, Knockout, GTP Phosphohydrolases, Thermogenesis, Mitochondrial Proteins, Metalloproteases, Lipid Metabolism, Mice, Adipocytes, Brown, Diet, High-Fat

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