Cited by 54Muscle Physiology and DisordersMitochondrial Function and PathologySepsis Diagnosis and Treatment

Parkin Overexpression Attenuates Sepsis-Induced Muscle Wasting

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Leduc-Gaudet, Jean-Philippe, Mayaki, Dominique, Reynaud, Olivier, Broering, Felipe E., Chaffer, Tomer J., Hussain, Sabah N. A., Gouspillou, Gilles·2020·Cells

Abstract

Sepsis elicits skeletal muscle weakness and fiber atrophy. The accumulation of injured mitochondria and depressed mitochondrial functions are considered as important triggers of sepsis-induced muscle atrophy. It is unclear whether mitochondrial dysfunctions in septic muscles are due to the inadequate activation of quality control processes. We hypothesized that overexpressing Parkin, a protein responsible for the recycling of dysfunctional mitochondria by the autophagy pathway (mitophagy), would confer protection against sepsis-induced muscle atrophy by improving mitochondrial quality and content. Parkin was overexpressed for four weeks in the limb muscles of four-week old mice using intramuscular injections of adeno-associated viruses (AAVs). The cecal ligation and perforation (CLP) procedure was used to induce sepsis. Sham operated animals were used as controls. All animals were studied for 48 h post CLP. Sepsis resulted in major body weight loss and myofiber atrophy. Parkin overexpression prevented myofiber atrophy in CLP mice. Quantitative two-dimensional transmission electron microscopy revealed that sepsis is associated with the accumulation of enlarged and complex mitochondria, an effect which was attenuated by Parkin overexpression. Parkin overexpression also prevented a sepsis-induced decrease in the content of mitochondrial subunits of NADH dehydrogenase and cytochrome C oxidase. We conclude that Parkin overexpression prevents sepsis-induced skeletal muscle atrophy, likely by improving mitochondrial quality and contents.

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Authors
Leduc-Gaudet, J.-P., Mayaki, D., Reynaud, O., Broering, F. E., Chaffer, T. J., Hussain, S. N. A., & Gouspillou, G.
Affiliations
  • Meakins-Christie Laboratories and Translational Research in Respiratory Diseases Program, Research Institute of the McGill University Health Centre; Department of Critical Care, McGill University Health Centre, Montréal, QC H4A 3J1, Canada
  • McGill University Health Centre (CA)
  • Université du Québec à Montréal (CA)
Corresponding author
  • Hussain, Sabah N. A.
  • Gouspillou, Gilles
Venue
Cells
Publisher
MDPI AG
Published
2020-06-11
Volume
9
Issue
6
Pages
1454
ISSN
2073-4409 (ISSN-L)
OpenAlex
W3034767506
Cited by
54
References
55
Citations by year
2026: 6 · 2025: 10 · 2024: 12 · 2023: 10 · 2022: 6 · 2021: 8 · 2020: 2
FWCI
2.11
Type
journal article
Language
en
Open access
Locations
  • Cells (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Le dépôt institutionnel (Université du Québec à Trois-Rivières) (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • Natural Sciences and Engineering Research Council of Canada (RGPIN-2014-04668)
  • Canadian Institutes of Health Research (MOP-93760, MOV-409262)
  • Fonds de Recherche du Québec - Santé (FRQS-35184)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Health Sciences › Medicine › Epidemiology › Sepsis Diagnosis and Treatment
Keywords
Parkin, sepsis, muscle atrophy, mitophagy, mitochondrial quality control, skeletal muscle weakness, cecal ligation and puncture, mitochondrial dysfunction, NADH dehydrogenase, cytochrome c oxidase, AAV gene delivery
MeSH terms
Animals, Cecum, Gene Expression Regulation, Ligation, Male, Mice, Inbred C57BL, Mitochondria, Muscular Atrophy, Signal Transduction, Muscle Fibers, Skeletal, Sepsis, Ubiquitin-Protein Ligases, Mitochondrial Dynamics

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