Fig. 3.
PTH induces hMSC differentiation into osteoprogenitor cells. Immunohistochemistry was performed on tissue samples harvested 8 weeks after surgery. The sections were stained with antibodies against the well-established osteogenic markers osteocalcin (Oc) and bone sialoprotein (BSP), in addition to DAPI staining. Yellow arrows indicate bone defect margins; orange arrows indicate co-staining of DiI and bone markers. MSCs mesenchymal stem cells, PTH parathyroid hormone