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Elżbieta Jakubowska-Pietkiewicz 1 Article
Calcium & bone metabolism
Osteocalcin: Beyond Bones
Jakub Krzysztof Nowicki, Elżbieta Jakubowska-Pietkiewicz
Endocrinol Metab. 2024;39(3):399-406.   Published online May 28, 2024
DOI: https://doi.org/10.3803/EnM.2023.1895
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  • 4 Web of Science
  • 4 Crossref
AbstractAbstract PDFPubReader   ePub   
Apart from basic roles such as supporting the body, protecting internal organs, and storing calcium, the skeletal system also performs hormonal functions. In recent years, several reports have been published on proteins secreted by bones and their impact on the homeostasis of the entire body. These proteins include fibroblast growth factor 23, sclerostin, lipocalin 2, and osteocalcin. Osteocalcin, the most abundant non-collagenous protein in bone tissue, is routinely measured as a clinical marker for diagnosing bone metabolism disorders. Its molecule undergoes numerous transformations, with decarboxylation being the critical process. Decarboxylation occurs in the acidic environment typical of bone resorption, facilitating the release of the molecule into the bloodstream and enabling its hormonal action. Decarboxylated osteocalcin promotes insulin secretion and stimulates the proliferation of pancreatic islet β-cells. It also plays a role in reducing the accumulation of visceral fat and decreasing fat storage in the liver. Furthermore, decarboxylated osteocalcin levels are inversely correlated with fasting serum glucose levels, total body fat, visceral fat area, and body mass index. Apart from its role in energy metabolism, osteocalcin affects testosterone production and the synthesis of glucagon-like peptide-1. It is also actively involved in muscle-bone crosstalk and influences cognitive function.

Citations

Citations to this article as recorded by  
  • Osteocalcin: A bone protein with multiple endocrine functions
    William Determe, Sabina Chaudhary Hauge, Justine Demeuse, Philippe Massonnet, Elodie Grifnée, Loreen Huyghebaert, Thomas Dubrowski, Matthieu Schoumacher, Stéphanie Peeters, Caroline Le Goff, Pieter Evenepoel, Ditte Hansen, Etienne Cavalier
    Clinica Chimica Acta.2025; 567: 120067.     CrossRef
  • Glucagon-like peptide-1 receptor agonists: Exploring the mechanisms from glycemic control to treatment of multisystemic diseases
    Mo-Wei Kong, Yang Yu, Ying Wan, Yu Gao, Chun-Xiang Zhang
    World Journal of Gastroenterology.2024; 30(36): 4036.     CrossRef
  • GPR37 and its neuroprotective mechanisms: bridging osteocalcin signaling and brain function
    Xuepeng Bian, Yangping Wang, Weijie Zhang, Changlin Ye, Jingjing Li
    Frontiers in Cell and Developmental Biology.2024;[Epub]     CrossRef
  • The Role of Bone-Derived Osteocalcin in Testicular Steroidogenesis: Contributing Factor to Male Fertility
    Izatus Shima Taib, Putri Ayu Jayusman
    Diseases.2024; 12(12): 335.     CrossRef
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