Figure 4: Immunofluorescence staining of DAPI (blue) and CD31/CK10 (green) in iPSC-MSCs after bFGF/KGF induction (×100). After bFGF/KGF induction, CD31/CK10 was significantly expressed in iPSC-MSCs. The yellow arrows indicated that cell morphology still exhibited a MSC-like long spindle type, and the red arrow showed that cell morphology gradually changed from long spindle shape to oblate or irregular shape.