Cited by 90Bone Metabolism and DiseasesRegulation of Appetite and ObesityAdipokines, Inflammation, and Metabolic Diseases

Regulation of Energy Metabolism by Bone-Derived Hormones

Open access
Mera, Paula, Ferron, Mathieu, Mosialou, Ioanna·2018·Cold Spring Harbor Perspectives in Medicine

Abstract

Like many other organs, bone can act as an endocrine organ through the secretion of bone-specific hormones or "osteokines." At least two osteokines are implicated in the control of glucose and energy metabolism: osteocalcin (OCN) and lipocalin-2 (LCN2). OCN stimulates the production and secretion of insulin by the pancreatic β-cells, but also favors adaptation to exercise by stimulating glucose and fatty acid (FA) utilization by the muscle. Both of these OCN functions are mediated by the G-protein-coupled receptor GPRC6A. In contrast, LCN2 influences energy metabolism by activating appetite-suppressing signaling in the brain. This action of LCN2 occurs through its binding to the melanocortin 4 receptor (MC4R) in the paraventricular nucleus of the hypothalamus (PVN) and ventromedial neurons of the hypothalamus.

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Crossref · 10.1101/cshperspect.a031666

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  • Osteocalcin is released by bone following bouts of exercise and cooperates with myokines to increase free fatty acid utilization in multiple tissues.

    “the osteokine osteocalcin (OCN) is released by bone following bouts of exercise and cooperates with myokines to increase FFA utilization in multiple tissues [28]”

    From The Role of Exercise in the Interplay between Myokines, Hepatokines, Osteokines, Adipokines, and Modulation of Inflammation for Energy Substrate Redistribution and Fat Mass Loss: A Review (2020) · cites this paper as [28]

    The exercise and skeletal-muscle sections report that bioactive osteocalcin rises after exercise and promotes fatty-acid utilization in muscle. The cross-talk section describes an interaction with the myokine IL-6, but says whether they act synergistically to increase fatty-acid utilization remains to be established. It does not report increased fatty-acid utilization in multiple tissues; it describes fatty-acid production in white adipose tissue instead. Page numbers are unavailable in our copy. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • OCN is known to increase with acute bouts of exercise, such as 4 × 4-min cycling at 95% maximum heart rate HIIT.

    “Importantly, OCN is known to increase with acute bouts of exercise, such as 4 × 4-min cycling at 95% maximum heart rate HIIT [28,214].”

    From The Role of Exercise in the Interplay between Myokines, Hepatokines, Osteokines, Adipokines, and Modulation of Inflammation for Energy Substrate Redistribution and Fat Mass Loss: A Review (2020) · cites this paper as [28]

    The section “A Role for Osteocalcin in Adaptation to Exercise” (page unavailable) says circulating bioactive OCN doubles after a single bout of endurance exercise in mice and humans. It does not describe the cited example of 4 × 4-minute cycling at 95% maximum heart rate, so the specific HIIT protocol is not supported by this source. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • IL-6 increases production of OCN by osteoblasts, which itself stimulates transient pancreatic secretion of the anorexic hormone insulin and triggers a positive feed-forward mechanism that results in increased OCN and thus more insulin.

    “Moreover, IL-6 increases production of OCN by osteoblasts [71] (2c), which itself stimulates transient pancreatic secretion of the anorexic hormone insulin and triggers a positive feed-forward mechanism that results in increased OCN and thus more insulin [28,209,210] (2d).”

    From The Role of Exercise in the Interplay between Myokines, Hepatokines, Osteokines, Adipokines, and Modulation of Inflammation for Energy Substrate Redistribution and Fat Mass Loss: A Review (2020) · cites this paper as [28]

    The cross-talk section (page unavailable) says IL-6 increases bioactive osteocalcin during exercise, while the glucose-metabolism section says osteocalcin stimulates pancreatic insulin secretion. The bone-resorption section describes a feed-forward loop in which insulin signaling increases the release of bioactive osteocalcin. It does not say that IL-6 directly increases osteocalcin production by osteoblasts, or characterize insulin here as an anorexic hormone. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • OCN and irisin may exert direct anti-oxidant and anti-inflammatory effects in the liver.

    “OCN [28,215] and irisin [61,65], on the other hand, may also exert direct anti-oxidant and anti-inflammatory effects in the liver.”

    From The Role of Exercise in the Interplay between Myokines, Hepatokines, Osteokines, Adipokines, and Modulation of Inflammation for Energy Substrate Redistribution and Fat Mass Loss: A Review (2020) · cites this paper as [28]

    The OCN section’s Figure 1 caption says osteocalcin may decrease inflammation in steatotic liver, supporting a possible anti-inflammatory effect. It does not describe an antioxidant effect or establish that the liver effect is direct. This paper is cited for OCN, not irisin; the indexed passages provide no page number. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • Osteocalcin (OCN) is a bone-derived hormone that is synthesized and secreted by osteoblasts and then activated by osteoclasts during the process of bone resorption.

    “Osteocalcin (OCN) is a bone-derived hormone that is synthesized and secreted by osteoblasts and then activated by osteoclasts during the process of bone resorption [28].”

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Research works printed but not linked: 1

  1. [82]82. Ã Whyte MP. 2017. Hypophosphatasia. Cold Spring Harb Per- spect Med doi: 10.1101/cshperspect.a031567. · DOI

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Authors
Mera, P., Ferron, M., & Mosialou, I.
Affiliations
  • Columbia University Irving Medical Center (US)
  • Montreal Clinical Research Institute (CA)
Venue
Cold Spring Harbor Perspectives in Medicine
Published
2017-08-04
Volume
8
Issue
6
Pages
a031666
ISSN
2157-1422 (ISSN-L)
OpenAlex
W2744690554
Cited by
90
References
91
Citations by year
2026: 7 · 2025: 14 · 2024: 8 · 2023: 9 · 2022: 7 · 2021: 12 · 2020: 22 · 2019: 5 · 2018: 6
Type
posted content
Language
en
Open access
Locations
  • Cold Spring Harbor Perspectives in Medicine (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Canadian Institutes of Health Research (MOP133652)
  • Natural Sciences and Engineering Research Council of Canada
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Bone Metabolism and Diseases
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
Keywords
osteokines, bone endocrine function, osteocalcin, neutrophil gelatinase-associated lipocalin, energy metabolism, glucose metabolism, insulin secretion, GPRC6A, exercise adaptation, fatty acid utilization, melanocortin-4 receptor, hypothalamic regulation of appetite, paraventricular nucleus
MeSH terms
Lipocalin-2, Animals, Bone and Bones, Energy Metabolism, Glucose, Humans, Insulin, Signal Transduction, Exercise, Osteocalcin, Receptors, G-Protein-Coupled, Receptor, Melanocortin, Type 4

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