Abstract
Osteoclast and osteoblast are essential for proper bone development and remodeling as well as recovery of bone fracture. In this study, we seek chemical compounds that enhance turnover of bone metabolism for promoting bone healing. First, we screen a chemical library which includes 378 compounds by using murine pre-osteoclastic RAW264.7 cells to identify compounds that promote osteoclastic differentiation. We find that two ROCK (Rho-associated coiled-coil kinase) inhibitors, HA-1077 (Fasudil) and Y-27632, enhance osteoclastogenesis. Subsequently, we identify that these two compounds also increase osteoblastic differentiation of MC3T3-E1 cells. Finally, our in vivo experiment shows that the local administration of ROCK inhibitors accelerate the bone healing of the rat calvarial defect.
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