Cited by 223Muscle Physiology and DisordersMuscle metabolism and nutritionNutrition and Health in Aging

Osteocalcin is necessary and sufficient to maintain muscle mass in older mice

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Mera, Paula, Laue, Kathrin, Wei, Jianwen, Berger, Julian Meyer, Karsenty, Gerard·2016·Molecular Metabolism

Abstract

OBJECTIVE: A decrease in muscle protein turnover and therefore in muscle mass is a hallmark of aging. Because the circulating levels of the bone-derived hormone osteocalcin decline steeply during aging in mice, monkeys and humans we asked here whether this hormone might regulate muscle mass as mice age. METHODS: We examined muscle mass and strength in mice lacking osteocalcin (Ocn-/-) or its receptor in all cells (Gprc6a-/-) or specifically in myofibers (Gprc6a Mck -/-) as well as in 9 month-old WT mice receiving exogenous osteocalcin for 28 days. We also examined protein synthesis in WT and Gprc6a-/- mouse myotubes treated with osteocalcin. RESULTS: We show that osteocalcin signaling in myofibers is necessary to maintain muscle mass in older mice in part because it promotes protein synthesis in myotubes without affecting protein breakdown. We further show that treatment with exogenous osteocalcin for 28 days is sufficient to increase muscle mass of 9-month-old WT mice. CONCLUSION: This study uncovers that osteocalcin is necessary and sufficient to prevent age-related muscle loss in mice.

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Crossref · 10.1016/j.molmet.2016.07.002

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  • Osteokines are novel exercise-inducible soluble factors secreted by osteocytes, osteoblasts, and osteoclasts that play an important role in the body's response to exercise, mainly including RANKL, sclerostin, osteocalcin, FGF23, Wnt3a, TGF-β, IGF-1, and PGE2.

    “Osteokines, novel exercise-inducible soluble factors secreted by osteocytes, osteo blasts, and osteoclasts, play an important role in the body’s response to exercise, mainly including RANKL [127], sclerostin [128], osteocalcin [129], fibroblast growth factor 23 (FGF23) [95], Wnt3a [130], TGF-β [131], IGF-1 [132], and prostaglandin E2 (PGE2) [133] (Figure 3).”
  • In older mice, osteocalcin signaling in myotubes promotes protein synthesis without affecting protein breakdown via activation of the mTOR pathway, and osteocalcin is necessary and sufficient to attenuate age-related muscle loss.

    “In older mice, osteocalcin signaling in the myotubes promotes protein synthesis without affecting protein breakdown via activation of the mTOR pathway, uncovering that osteocalcin is both necessary and sufficient to attenuate age-related muscle loss [129].”

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Authors
Mera, P., Laue, K., Wei, J., Berger, J. M., & Karsenty, G.
Affiliations
Columbia University Irving Medical Center (US)
Venue
Molecular Metabolism
Publisher
Elsevier BV
Published
2016-10
Volume
5
Issue
10
Pages
1042-1047
ISSN
2212-8778 (ISSN-L)
OpenAlex
W2479847107
Cited by
223
References
30
Citations by year
2026: 10 · 2025: 22 · 2024: 22 · 2023: 30 · 2022: 14 · 2021: 32 · 2020: 33 · 2019: 26 · 2018: 15 · 2017: 17 · 2016: 1 · 2014: 1
FWCI
10.22
Type
journal article
Language
en
Update notices
erratum (2017-08-01)
Open access
Locations
  • Molecular Metabolism (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
NIH (5RO1AR045548, PO1AG032959)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Muscle metabolism and nutrition
  • Health Sciences › Medicine › Physiology › Nutrition and Health in Aging
Keywords
osteocalcin, muscle mass, muscle atrophy, aging, GPRC6A, muscle fibers, muscle protein synthesis, muscle protein turnover, muscle strength, muscle-bone crosstalk

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