Cited by 61Spaceflight effects on biologyMuscle Physiology and DisordersSpace Exploration and Technology

Skeletal muscle in MuRF1 null mice is not spared in low-gravity conditions, indicating atrophy proceeds by unique mechanisms in space

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Cadena, Samuel M., Zhang, Yunyu, Fang, Jian, Brachat, Sophie, Kuss, Pia, Giorgetti, Elisa, Stodieck, Louis S., Kneissel, Michaela +1 more·2019·Scientific Reports

Abstract

Microgravity exposure is associated with loss of muscle mass and strength. The E3 ubiquitin ligase MuRF1 plays an integral role in degrading the contractile apparatus of skeletal muscle; MuRF1 null (KO) mice have shown protection in ground-based models of muscle atrophy. In contrast, MuRF1 KO mice subjected to 21 days of microgravity on the International Space Station (ISS) were not protected from muscle atrophy. In a time course experiment microgravity-induced muscle loss on the ISS showed MuRF1 gene expression was not upregulated. A comparison of the soleus transcriptome profiles between spaceflight and a publicly available data set for hindlimb suspension, a claimed surrogate model of microgravity, showed only marginal commonalities between the models. These findings demonstrate spaceflight induced atrophy is unique, and that understanding of effects of space requires study situated beyond the Earth’s mesosphere.

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  • MuRF1 knockout mice are not protected from denervation-induced muscle loss at 7 days and only partially protected (around 30%) at 14 days; absence of MuRF1 does not protect from fasting or microgravity-induced atrophy, while muscle mass is spared following glucocorticoid treatment.

    “MuRF1 knockout mice are not protected from denervation-induced muscle loss at 7 days and only partially protected (around 30%) at 14 days39. Moreover, the absence of MuRF1 does not protect from fasting or microgravity induced atrophy, while muscle mass is spared following glucocorticoid treatment43,44.”

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  1. [22]Aihara M A new model of skeletal muscle atrophy induced by immobilization using a hook-and-loop fastener in mice J Phys Ther Sci 2017 29 1779 1783 10.1589/jpts.29.1779 29184288 PMC5684009 · DOI

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Authors
Cadena, S. M., Zhang, Y., Fang, J., Brachat, S., Kuss, P., Giorgetti, E., Stodieck, L. S., Kneissel, M., & Glass, D. J.
Affiliations
  • Novartis (Switzerland) (CH)
  • University of Colorado Boulder (US)
Corresponding author
Glass, David J.
Venue
Scientific Reports
Published
2019-06-28
Volume
9
Issue
1
Pages
9397-9397
ISSN
2045-2322 (ISSN-L)
OpenAlex
W2955034262
Cited by
61
References
26
Citations by year
2026: 5 · 2025: 5 · 2024: 5 · 2023: 12 · 2022: 9 · 2021: 13 · 2020: 8 · 2019: 4
FWCI
5.83
Type
journal article
Language
en
Open access
Locations
  • Scientific Reports (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • The Novartis Repository (Novartis) (submittedVersion, cc-by)
Funders
  • National Aeronautics and Space Administration
  • Kennedy Space Center
  • Novartis Institutes for BioMedical Research
Topics
  • Health Sciences › Medicine › Physiology › Spaceflight effects on biology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Physical Sciences › Engineering › Aerospace Engineering › Space Exploration and Technology
Keywords
MuRF1, skeletal muscle atrophy, microgravity, spaceflight, E3 ubiquitin ligase, soleus muscle, hindlimb unloading, transcriptome, muscle mass loss, International Space Station
MeSH terms
Tripartite Motif Proteins, Animals, Disease Susceptibility, Gene Expression Regulation, Muscle Proteins, Muscular Atrophy, Organ Size, Space Flight, Mice, Knockout, Hypogravity, Muscle, Skeletal, Hindlimb Suspension, Gene Expression Profiling, Ubiquitin-Protein Ligases, Mice

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