Mesenchymal stem cells could differentiate into adipocyte osteoblasts by induction in vitro. (A) Osteogenesis of bone marrow mesenchymal stem cells (BM-MSCs) and umbilical cord mesenchymal stem cells (UC-MSCs). After osteogenic induction, many calcium deposits appeared in osteocytes, which were stained red with Alizarin Red. (B) Adipogenesis of BM-MSCs and UC-MSCs. The lipid droplets generated in adipocytes were stained red with Oil Red O. Scale bars, 100 μm.