Fig. 7: No tumors were formed in nude mice transplanted with the HGF + VEGF/U-Ms.

a Tumor formation was observed 4 weeks after cell transplantation in BALB/c nude mice. MDA-MB-231 cells were used as a positive control. Tumors did not form in the U-M or HGF + VEGF/U-M groups. b The tumor volume was measured weekly. c Mice were sacrificed and dissected 4 weeks after transplantation, and tumor formation was analyzed. N = 4