Osteoblast AMP-activated protein kinase regulates glucose metabolism and bone mass in adult mice

Ippei Kanazawa, Ayumu Takeno, Ken ichiro Tanaka, Masakazu Notsu, Toshitsugu Sugimoto

研究成果: Contribution to journalArticle査読

2 被引用数 (Scopus)

抄録

Previous studies have shown that AMP-activated protein kinase (AMPK), a crucial regulator of energy homeostasis, plays important roles in osteoblast differentiation and mineralization. However, little is known about in vivo roles of osteoblastic AMPK in glucose metabolism and bone mass regulation in adult mice. Here, we used the inducible Cre system to control the onset of Ampk disruption after birth by removing doxycycline supplementation. We conditionally inactivated Ampk in osterix (Osx)-expressing cells in 3-week-old Ampk −/− mice. After 6 months of Ampk inactivation, the Ampk −/− mice displayed lower serum osteocalcin levels as well as glucose intolerance and insulin resistance, as indicated by glucose tolerance and insulin tolerance tests, respectively, when compared with wild-type mice. After 18 months of Ampk inactivation, micro computed tomography showed significant reductions in trabecular bone volume and cortical bone thickness in the femur of Ampk −/− mice when compared with wild-type mice. Moreover, bone stiffness was significantly lower in Ampk −/− mice than in wild-type mice. This is the first study to show that osteoblast AMPK plays an important roles in glucose metabolism and in maintaining trabecular bone volume, cortical thickness, and bone strength in adult mice.

本文言語英語
ページ(範囲)1955-1961
ページ数7
ジャーナルBiochemical and Biophysical Research Communications
503
3
DOI
出版ステータス出版済み - 9 10 2018
外部発表はい

All Science Journal Classification (ASJC) codes

  • 生物理学
  • 生化学
  • 分子生物学
  • 細胞生物学

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