Cited by 14Muscle Physiology and DisordersAdipose Tissue and MetabolismMetabolism, Diabetes, and Cancer

Long-Term PGC1β Overexpression Leads to Apoptosis, Autophagy and Muscle Wasting

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Sopariwala, Danesh H., Yadav, Vikas, Badin, Pierre-Marie, Likhite, Neah, Sheth, Megha, Lorca, Sabina, Vila, Isabelle K., Kim, Eun Ran +4 more·2017·Scientific Reports

Abstract

Skeletal muscle wasting is prevalent in many chronic diseases, necessitating inquiries into molecular regulation of muscle mass. Nuclear receptor co-activator peroxisome proliferator-activated receptor co-activator 1 alpha (PGC1α) and its splice variant PGC1α4 increase skeletal muscle mass. However, the effect of the other PGC1 sub-type, PGC1β, on muscle size is unclear. In transgenic mice selectively over-expressing PGC1β in the skeletal muscle, we have found that PGC1β progressively decreases skeletal muscle mass predominantly associated with loss of type 2b fast-twitch myofibers. Paradoxically, PGC1β represses the ubiquitin-proteolysis degradation pathway genes resulting in ubiquitinated protein accumulation in muscle. However, PGC1β overexpression triggers up-regulation of apoptosis and autophagy genes, resulting in robust activation of these cell degenerative processes, and a concomitant increase in muscle protein oxidation. Concurrently, PGC1β up-regulates apoptosis and/or autophagy transcriptional factors such as E2f1, Atf3, Stat1, and Stat3, which may be facilitating myopathy. Therefore, PGC1β activation negatively affects muscle mass over time, particularly fast-twitch muscles, which should be taken into consideration along with its known aerobic effects in the skeletal muscle.

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Authors
Sopariwala, D. H., Yadav, V., Badin, P.-M., Likhite, N., Sheth, M., Lorca, S., Vila, I. K., Kim, E. R., Tong, Q., Song, M. S., Rodney, G. G., & Narkar, V. A.
Affiliations
  • Rice University (US)
  • The University of Texas MD Anderson Cancer Center (US)
  • Baylor College of Medicine (US)
  • The University of Texas Health Science Center at Houston (US)
Corresponding author
Narkar, Vihang A.
Venue
Scientific Reports
Published
2017-08-31
Volume
7
Issue
1
Pages
10237-10237
ISSN
2045-2322 (ISSN-L)
OpenAlex
W2745470229
Cited by
14
References
82
Citations by year
2026: 1 · 2024: 2 · 2023: 1 · 2022: 2 · 2021: 1 · 2020: 2 · 2019: 2 · 2018: 3
FWCI
0.78
Type
journal article
Language
en
Open access
Locations
  • Scientific Reports (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • HAL (submittedVersion)
Funders
  • Welch Foundation (L-AU0002)
  • University of Texas Health Science Center at Houston
  • National Heart, Lung, and Blood Institute (R01HL129191)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
Keywords
PGC-1β, skeletal muscle atrophy, muscle atrophy, apoptosis, autophagy, ubiquitin-proteasome degradation, protein oxidation, E2F1, ATF3, STAT1, STAT3, transgenic mice, muscle mass regulation, myopathy
MeSH terms
Animals, Autophagy, Mice, Transgenic, Muscular Atrophy, Nuclear Proteins, Organ Size, Transcription Factors, Apoptosis, Oxidative Stress, Muscle, Skeletal, Mice, Ubiquitination, Proteolysis

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