期刊
ENDOCRINE RESEARCH
卷 39, 期 4, 页码 144-151出版社
TAYLOR & FRANCIS INC
DOI: 10.3109/07435800.2013.879168
关键词
Energy metabolism; insulin receptor; insulin signaling pathway; osteoblasts; undercarboxylated osteocalcin
资金
- Thailand Research Fund BRG
- Chiang Mai University Excellent Center Award
- [RTA 5580006]
- [MRG5480270]
Insulin and its downstream signaling pathway are indispensable for postnatal bone growth and turnover by having influence on both osteoblast and osteoclast development. Insulin signaling regulates both bone formation by osteoblasts and bone resorption by osteoclasts; however, the regulation occurs mainly through the insulin signaling pathway within osteoblasts. An impairment of osteoblastic insulin signaling leads to an impaired bone quality by affecting osteoblast proliferation, differentiation and survival. The insulin signaling pathway and MAPK and PI3K/Akt pathways play pivotal roles in the differentiation, function and survival of bone cells. Current evidence suggests that osteoblastic insulin signaling not only modulates bone growth and turnover but is also required for energy metabolism. Several mice models with impaired insulin signaling exhibited both bone and metabolic phenotypes, including symptoms of low bone mass, obesity, glucose intolerance and insulin resistance. In this review, we discuss the key findings that suggest a pivotal role of osteoblastic insulin signaling in both bone and energy metabolism.
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