Morphologic appearance of BMSCs in culture supplemented with various growth factors. (A): Representative phase-contrast images showing the change of BMSC morphology under different treatments at day 3. (B): GFP fluorescence images showing BMSC growth patterns under different treatments at day 3. Scale bars = 100 µm. Abbreviations: BMP12, bone morphogenetic protein; BMSC, bone marrow-derived mesenchymal stem cell; CTGF, connective tissue growth factor; Ctrl, control; TGFβ1, transforming growth factor β1.