PROM1 and neoplasm: Corroborating the results of in vitro migration assays, MSCs labeling MION-Rh were able to cross the blood-brain barrier (Figs. 4D1 and 5c, o), co-locating CD133+ cells (Figs. 4D3, 5a) and promoting their proliferation (Figure 4D2 and Fig. 5b), when we follow the development of the tumor for 20 days.