A: The cpm of intracellular 125I in Bac-NIS-infected hUCB-MSCs with different MOIs at 24 hpi. B: Inhibitory effects of NaClO4 on 125I uptake in Bac-NIS-infected hUCB-MSCs at MOI = 200. C: Dynamic 125I uptake curve of Bac-NIS-infected hUCB-MSCs at MOI = 200. Results are means ± SD (n = 3). Abbreviations: cpm, counts per minute; ***, P<0.001; NS, no statistically significant difference.