IFNG and cancer: As shown in Figures 3(a)–3(f), MSCs IFN-γ induced apoptosis in H460, H1299, A549, and MCF-7 cancer cells, but not in 3T3 and 293FT cells; apoptosis was evident by the detachment of GFP-positive target cells and the appearance of cellular debris and apoptotic bodies in GFP-positive cells.