Rat glioblastoma C6 growth inhibition mediated by human yCD::UPRT-MSC-exos/5-FC conjugates in vivo. Tumors were induced by 5 × 105 or 1 × 106 C6 cells inoculated intracerebrally. (a) Survival of rats bearing 5 × 105 intracerebral C6 glioblastoma cells treated with yCD::UPRT-DP-MSC-exos/5-FC conjugate, yCD::UPRT-UC-MSC-exos/5-FC conjugate, and yCD::UPRT-AT- MSC-exos/5-FC conjugate applied s.c., i.n., and i.p. (b) Survival of rats bearing 1 × 106 intracerebral C6 glioblastoma cells treated with yCD::UPRT-DP-MSC-exos/5-FC conjugate by i.n. application (every day) and yCD::UPRT-UC-MSC-exos/5-FC conjugate applied i.p. three times per week (c) Course of body weights of treated and untreated animals during the experiment. (d) MRI examinations of treated animals during the course of treatment and final histopathological examinations. 5-FC, 5-fluorocytosine; MRI—magnetic resonance imaging.