Controlling hypoxia-inducible factor-2a is critical for maintaining bone homeostasis in mice
SY Lee, etc
Bone Research,
2019
Pathological bone loss is caused by an imbalance between bone formation and resorption. The bone microenvironments are hypoxic, and hypoxia-inducible factor (HIF) is known to play notable roles in bone remodeling. However, the relevant functions of HIF-2a are not well understood. Here, we have shown that HIF-2a deficiency in mice enhances bone mass through its effects on the differentiation of osteoblasts and osteoclasts. In vitro analyses revealed that HIF-2a inhibits osteoblast differentiation by targeting Twist2 and stimulates RANKL-induced osteoclastogenesis via regulation of Traf6. In addition, HIF-2a appears to contribute to the crosstalk between osteoblasts and osteoclasts by directly targeting RANKL in osteoprogenitor cells. Experiments performed with osteoblast- and osteoclast-specific conditional knockout mice supported a role of HIF-2a in this crosstalk. HIF-2a deficiency alleviated ovariectomy-induced bone loss in mice, and specific inhibition of HIF-2a with ZINC04179524 significantly blocked RANKL-mediated osteoclastogenesis. Collectively, our results suggest that HIF-2a functions as a catabolic regulator in bone remodeling, which is critical for the maintenance of bone homeostasis.
- Journal
- Bone Research
- Year
- 2019
- Page
- doi: 10.1038/s41413-019-0054-y
- Institute
- Chonnam National University
Referenced Products
Product | Cat No. |
---|---|
Ad-m-TWIST2-shRNA | shADV-275369 |
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