FIGURE 2.
Signaling pathways in the regulation of MSC osteogenic differentiation. BMP signaling, Wnt signaling, and SHH signaling pathways are involved in the modulation of MSC osteogenesis, and the targets are the transcription factors Runx2 and Osx. MSC, mesenchymal stem cell; BMP, bone morphogenetic protein; Wnt, wingless-type MMTV integration site; SHH, sonic hedgehog; Runx2, runt-related transcription factor 2; Osx, osterix.