PROM1 and glioblastoma: Interestingly, when 1 × 104 MSCs labeled MION-Rh were implanted together with 1 × 104 CD133+ GBM cells labeled Qdot 750 nm (condition C), the tumor displayed significant progression on the contralateral side, in which also was evidenced migration of MSCs labeled MION-Rh (Fig. 4C4; representative image of the whole group).