Journal
BIOSCIENCE BIOTECHNOLOGY AND BIOCHEMISTRY
Volume 80, Issue 11, Pages 2176-2183Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/09168451.2016.1214530
Keywords
adipocyte; glucose metabolism; oral administration; osteocalcin; pork bone
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Funding
- Japan Society for the Promotion of Science [KAKENHI grant] [24229009, 26861553, 16K20421]
- Japan Science and Technology Agency [A-STEP AS262Z01787Q]
- Grants-in-Aid for Scientific Research [16K20421, 26861553] Funding Source: KAKEN
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Osteocalcin (OC) is a bone-derived hormone that regulates energy metabolism. OC exists in two forms, carboxylated (GlaOC) and uncaboxylated (GluOC), but only the latter appears to have an endocrine function. In this study, we prepared an extract containing both Gla- and GluOC from boiled pork bone using 0.2M carbonate buffer at pH 9.5, and tested whether the extract had beneficial effects on improving metabolic parameters in obese mice. The extract equivalent of 1.2g of GluOC/mouse was orally administrated to C57BL/6 female mice fed a high-fat, high-sucrose diet. Daily oral administration of the extract for four weeks decreased blood glucose levels and promoted glucose tolerance as well as insulin sensitivity. Our study shows for the first time that boiled pork bones are a source material for osteocalcin in the large-scale production of supplements designed to improve glucose metabolism.
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