Figure 8: Caspase-3 activities in HL-60 cells after a 3-min exposure to ultrasound in the presence and absence of ATX-S10. ϒ, control; ■, 80 μM ATX-S10 alone; ○, ultrasound alone; ●, 80 μM ATX-S10 + ultrasound. Values represent the means ± S.D. of four independent experiments. The asterisk symbol indicates significant difference from untreated cells at P < 0.05.