Restoration of sensitivity to ADM by sodium selenite. Viable cells were estimated by MTT assays after incubation with different doses of ADM in the presence or absence of sodium selenite (10⁻⁷ mol/L) for 3 days. Representative results were obtained from 3 different experiments that showed similar results. The mean ± SD for the IC₅₀ obtained from 3 different experiments is shown in Table 4. (A) ATL-2, (B) ATL-2/ADM cl-2, (C) Jurkat.