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Viability (trypan blue) of DU145 cells treated with 111In-oxine or 67Ga-oxine at 72 h. A: Viability with increasing cell-bound activities (Bq) per cell. B: Controls for radionuclide oxine treatment: untreated cells, non-cell-bound radioactivity and decayed oxine complexes, standardized at 15 MBq/mL, inducing cellular uptake of 9.09 ± 1.33 Bq/cell for 111In-oxine and 1.12 ± 0.20 Bq/cell for 67Ga-oxine groups. Data are average ± SD (n = 3/group).
