Cited by 16Genetics, Aging, and Longevity in Model OrganismsMitochondrial Function and PathologyAutophagy in Disease and Therapy

Disentangling the effect of dietary restriction on mitochondrial function using recombinant inbred mice

Mulvey, Lorna, Sands, William A., Salin, Karine, Carr, Amanda E., Selman, Colin·2017·Molecular and Cellular Endocrinology

Abstract

Dietary restriction (DR) extends lifespan and healthspan in many species, but precisely how it elicits its beneficial effects is unclear. We investigated the impact of DR on mitochondrial function within liver and skeletal muscle of female ILSXISS mice that exhibit strain-specific variation in lifespan under 40% DR. Strains TejJ89 (lifespan increased under DR), TejJ48 (lifespan unaffected by DR) and TejJ114 (lifespan decreased under DR) were studied following 10 months of 40% DR (13 months of age). Oxygen consumption rates (OCR) within isolated liver mitochondria were unaffected by DR in TejJ89 and TejJ48, but decreased by DR in TejJ114. DR had no effect on hepatic protein levels of PGC-1a, TFAM, and OXPHOS complexes IV. Mitonuclear protein imbalance (nDNA:mtDNA ratio) was unaffected by DR, but HSP90 protein levels were reduced in TejJ114 under DR. Surprisingly hepatic mitochondrial hydrogen peroxide (H 2 O 2) production was elevated by DR in TejJ89, with total superoxide dismutase activity and protein carbonyls increased by DR in both TejJ89 and TejJ114. In skeletal muscle, DR had no effect on mitochondrial OCR, OXPHOS complexes or mitonuclear protein imbalance, but H 2 O 2 production was decreased in TejJ114 and nuclear PGC-1a increased in TejJ89 under DR. Our findings indicate that hepatic mitochondrial dysfunction associated with reduced lifespan of TejJ114 mice under 40% DR, but similar dysfunction was not apparent in skeletal muscle mitochondria. We highlight tissue-specific differences in the mitochondrial response in ILSXISS mice to DR, and underline the importance and challenges of exploiting genetic heterogeneity to help understand mechanisms of ageing.

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Authors
Mulvey, L., Sands, W. A., Salin, K., Carr, A. E., & Selman, C.
Affiliations
University of Glasgow (GB)
Corresponding author
Selman, Colin
Venue
Molecular and Cellular Endocrinology
Publisher
Elsevier BV
Published
2017-11
Volume
455
Pages
41-53
ISSN
0303-7207 (ISSN-L)
OpenAlex
W2511506932
Cited by
16
References
81
Citations by year
2024: 1 · 2023: 2 · 2022: 1 · 2021: 2 · 2020: 4 · 2019: 3 · 2018: 1 · 2017: 2
FWCI
1.08
Type
journal article
Language
en
Open access
closed
Locations
  • Molecular and Cellular Endocrinology (publishedVersion)
  • PubMed (publishedVersion)
  • ENLIGHTEN (Jurnal Bimbingan dan Konseling Islam) (acceptedVersion)
Funders
University of Glasgow
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Aging › Genetics, Aging, and Longevity in Model Organisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
Keywords
dietary restriction, mitochondrial function, lifespan extension, recombinant inbred mouse strains, liver mitochondria, skeletal muscle mitochondria, oxygen consumption rate, PGC-1α, OXPHOS complexes, HSP90, hydrogen peroxide production, superoxide dismutase, protein carbonylation, aging, genetic heterogeneity
MeSH terms
Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha, Animals, DNA-Binding Proteins, DNA, Mitochondrial, Female, Gene Expression Regulation, High Mobility Group Proteins, Hydrogen Peroxide, Liver, Longevity, Mice, Transgenic, Mitochondria, Liver, Mitochondria, Muscle, Organ Specificity, Oxidation-Reduction, Oxygen Consumption, Species Specificity, Superoxide Dismutase, Muscle, Skeletal, Genetic Heterogeneity, HSP90 Heat-Shock Proteins, Caloric Restriction, Electron Transport Chain Complex Proteins, Mice

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