Cited by 48Spaceflight effects on biologyMuscle Physiology and DisordersSpace exploration and regulation

Inhibition of myostatin prevents microgravity-induced loss of skeletal muscle mass and strength

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Smith, Rosamund C., Cramer, Martin S., Mitchell, Pamela J., Lucchesi, Jonathan, Ortega, Alicia M., Livingston, Eric W., Ballard, Darryl, Zhang, Ling +8 more·2020·PLoS ONE

Abstract

The microgravity conditions of prolonged spaceflight are known to result in skeletal muscle atrophy that leads to diminished functional performance. To assess if inhibition of the growth factor myostatin has potential to reverse these effects, mice were treated with a myostatin antibody while housed on the International Space Station. Grip strength of ground control mice increased 3.1% compared to baseline values over the 6 weeks of the study, whereas grip strength measured for the first time in space showed flight animals to be -7.8% decreased in strength compared to baseline values. Control mice in space exhibited, compared to ground-based controls, a smaller increase in DEXA-measured muscle mass (+3.9% vs +5.6% respectively) although the difference was not significant. All individual flight limb muscles analyzed (except for the EDL) weighed significantly less than their ground counterparts at the study end (range -4.4% to -28.4%). Treatment with myostatin antibody YN41 was able to prevent many of these space-induced muscle changes. YN41 was able to block the reduction in muscle grip strength caused by spaceflight and was able to significantly increase the weight of all muscles of flight mice (apart from the EDL). Muscles of YN41-treated flight mice weighed as much as muscles from Ground IgG mice, with the exception of the soleus, demonstrating the ability to prevent spaceflight-induced atrophy. Muscle gene expression analysis demonstrated significant effects of microgravity and myostatin inhibition on many genes. Gamt and Actc1 gene expression was modulated by microgravity and YN41 in opposing directions. Myostatin inhibition did not overcome the significant reduction of microgravity on femoral BMD nor did it increase femoral or vertebral BMD in ground control mice. In summary, myostatin inhibition may be an effective countermeasure to detrimental consequences of skeletal muscle under microgravity conditions.

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Authors
Smith, R. C., Cramer, M. S., Mitchell, P. J., Lucchesi, J., Ortega, A. M., Livingston, E. W., Ballard, D., Zhang, L., Hanson, J., Barton, K., Berens, S., Credille, K. M., Bateman, T. A., Ferguson, V. L., Ma, Y. L., & Stodieck, L. S.
Affiliations
  • Eli Lilly (United States) (US)
  • University of Colorado Boulder (US)
  • University of North Carolina at Chapel Hill (US)
  • Techshot (United States) (US)
Corresponding author
Smith, Rosamund C.
Venue
PLoS ONE
Published
2020-04-21
Volume
15
Issue
4
Pages
e0230818
ISSN
1932-6203 (ISSN-L)
OpenAlex
W3017383204
Cited by
48
References
53
Citations by year
2026: 5 · 2025: 4 · 2024: 6 · 2023: 9 · 2022: 7 · 2021: 14 · 2020: 3
FWCI
4.96
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • CU Scholar (University of Colorado Boulder) (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Figshare (submittedVersion, cc-by)
Funders
  • Center for the Advancement of Science in Space (GA-2016-239, T/)#003, GA-2016-239, T/O#003, GA-2016-239,T/O#003)
  • National Aeronautics and Space Administration (NNJ10GA25A)
Topics
  • Health Sciences › Medicine › Physiology › Spaceflight effects on biology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Space exploration and regulation
Keywords
myostatin inhibition, microgravity, spaceflight, skeletal muscle atrophy, muscle mass, muscle strength, grip strength, muscle gene expression, GAMT, ACTC1, bone mineral density, countermeasures, International Space Station
MeSH terms
Actins, Animals, Extremities, Femur, Immunoglobulin G, Mice, Inbred BALB C, Muscular Atrophy, Space Flight, Weightlessness, Gene Expression, Muscle, Skeletal, Guanidinoacetate N-Methyltransferase, Mice, Muscle Strength, Myostatin

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