Figure 4.

Viability Assay of EPG85-257 (a) and EPG85-257RDB (b) cell lines under the treatment with doxorubicin. The cells were incubated with different concentrations of doxorubicin (0–500 nM) for 4, 24, 48 and 72 h. Cell viability was measured by the MTT assay. Each experiment was repeated independently three times in triplicate tests and data are shown as mean ± SD. ***P ≤ 0.001