Cited by 96Mitochondrial Function and PathologyAdipose Tissue and MetabolismMetabolism, Diabetes, and Cancer

Regulation of Skeletal Muscle Oxidative Capacity and Insulin Signaling by the Mitochondrial Rhomboid Protease PARL

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Civitarese, Anthony E., MacLean, Paul S., Carling, Stacy, Kerr-Bayles, Lyndal, McMillan, Ryan P., Pierce, Anson, Becker, Thomas C., Moro, Cedric +10 more·2010·Cell Metabolism

Abstract

Type 2 diabetes mellitus (T2DM) and aging are characterized by insulin resistance and impaired mitochondrial energetics. In lower organisms, remodeling by the protease pcp1 (PARL ortholog) maintains the function and lifecycle of mitochondria. We examined whether variation in PARL protein content is associated with mitochondrial abnormalities and insulin resistance. PARL mRNA and mitochondrial mass were both reduced in elderly subjects and in subjects with T2DM. Muscle knockdown of PARL in mice resulted in malformed mitochondrial cristae, lower mitochondrial content, decreased PGC1alpha protein levels, and impaired insulin signaling. Suppression of PARL protein in healthy myotubes lowered mitochondrial mass and insulin-stimulated glycogen synthesis and increased reactive oxygen species production. We propose that lower PARL expression may contribute to the mitochondrial abnormalities seen in aging and T2DM.

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Crossref · 10.1016/j.cmet.2010.04.004

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  • PARL levels are reduced in skeletal muscle during aging and type 2 diabetes mellitus.

    “PARL levels are reduced in skeletal muscle during aging and type 2 diabetes mellitus [168].”
  • In mice, muscle knockdown of PARL results in alteration in mitochondrial cristae morphology, mitochondrial dysfunction, oxidative stress, and altered insulin signaling, probably explained by reduction in PARL-mediated OPA1 processing.

    “In mice, muscle knockdown of PARL results in an alteration in mitochondrial cristae morphology, mitochondrial dysfunction, oxidative stress, and altered insulin signaling, which probably can be explained by the reduction in PARL-mediated OPA1 processing [168].”
  • Suppression of PARL protein in cultured healthy human myotubes lowers mitochondrial mass and insulin-stimulated glycogen synthesis and increases reactive oxygen species production.

    “Suppression of PARL protein in cultured healthy human myotubes lowered mitochondrial mass and insulin-stimulated glycogen synthesis and increased reactive oxygen species production (60).”

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Authors
Civitarese, A. E., MacLean, P. S., Carling, S., Kerr-Bayles, L., McMillan, R. P., Pierce, A., Becker, T. C., Moro, C., Finlayson, J., Lefort, N., Newgard, C. B., Mandarino, L., Cefalu, W., Walder, K., Collier, G. R., Hulver, M. W., Smith, S. R., & Ravussin, E.
Affiliations
  • Pennington Biomedical Research Center (US)
  • University of Colorado Denver (US)
  • Deakin University (AU)
  • Virginia Tech (US)
  • Duke University (US)
  • Arizona State University (US)
  • Mayo Clinic in Arizona (US)
Corresponding author
Civitarese, Anthony E.
Venue
Cell Metabolism
Publisher
Elsevier BV
Published
2010-05
Volume
11
Issue
5
Pages
412-426
ISSN
1550-4131 (ISSN-L)
OpenAlex
W1970594198
Cited by
95
References
95
Citations by year
2026: 3 · 2025: 5 · 2024: 4 · 2023: 7 · 2022: 5 · 2021: 6 · 2020: 6 · 2019: 7 · 2018: 9 · 2017: 10 · 2016: 4 · 2015: 5 · 2014: 3 · 2013: 3 · 2012: 10
FWCI
2.74
Type
journal article
Language
en
Open access
Locations
  • Cell Metabolism (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • Figshare (submittedVersion, cc-by)
Funders
  • National Institute on Aging (U01AG020478, R01 AG20478)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK-67403, R01DK047936, K01DK067403, R01DK078765, R01DK066483, P30DK048520, P30DK072476)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
Keywords
PARL, rhomboid protease, mitochondrial proteolysis, skeletal muscle, insulin resistance, type 2 diabetes, aging, mitochondrial mass, mitochondrial cristae, PGC-1α, insulin signaling, reactive oxygen species, glycogen synthesis, mitochondrial dysfunction
MeSH terms
Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha, Adolescent, Adult, Aged, Aged, 80 and over, Aging, Animals, Cells, Cultured, Diabetes Mellitus, Type 2, Glycogen, Humans, Insulin, Middle Aged, Mitochondria, Transcription Factors, Signal Transduction, Trans-Activators, Reactive Oxygen Species, Mice, Knockout, Muscle, Skeletal, Mitochondrial Proteins, Metalloproteases, Mice

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