MKI67 and neoplasm: A representative staining of hMSC-treated and control tumors with Ki67 mAb is shown in the inset panel of Figure 6 Panel C. Double staining of paraffin-embedded sections from control tumor and hMSC-treated tumors by TUNEL and DAPI demonstrated that hMSC-treated tumors contained significantly a higher percentage of apoptotic cells than control tumors (P<0.0001 Student's t test with Welch's correction) (Fig. 6 Panel D).