Fig. 1. HL-60 cell viability following treatment with QDs and/or curcumin in the presence or absence of UVA irradiation. Cells were incubated in a 96-well microplate for 24 h, treated with 3, 5, 10, or 20 μg/ml QDs or 0.5, 1, 1.5, or 2 μg/ml curcumin, respectively (A) and co-exposed to 3, 5, or 10 μg/ml QDs and 1 μg/ml curcumin (B). Untreated control, CON(−); negative control (treated with DMSO), CON(+). Cell viability was determined by the WST assay. Data are shown as percentages of the control, and error bars represent standard deviations (S.D.) of duplicate experiments. Results were evaluated statistically by oneway ANOVA and Student’s t-test. * p < 0.05, ** p < 0.01, *** p < 0.001.