Figure 2.

Effects of CpG ODN7909 (CpG) and irradiation (IR) on cell viability of Hep-2 cells quantified using cell counting kit-8 assays. (a) Cells were treated with CpG ODN7909 at concentrations of 0, 5, 10, 20, 40 and 60µg/ml and CCK-8 was added at 24 and 48 h following treatment; and (b) cell viability in different treatment groups (control, 10 µg/ml CpG ODN7909 only, 10 Gy irradiation at only, or 10 µg/ml CpG ODN7909 with 10 Gy irradiation). Data presented as mean ± SD; ★P <0.01, control group versus IR group; ♦P <0.01, IR group versus CpG + IR group (one-way analysis of variance using Tukey’s HSD multiple comparisons test); CpG ODN, unmethylated cytosine-phosphate-guanine motif oligodeoxyribonucleotides