Fig. 1

Total ROS expression stained with DCFH-DA under cyclic stretch in ARPE-19 cells. a-d The total ROS expression was significantly increased at 15 min by cyclic stretch (p < 0.01). The total ROS expression at 6 h was significantly increased compared to both the control(p < 0.01) and the 15 min group(p < 0.01). There was no significant difference between the 6 h, 12 h and 24 h group(p = 0.952, 0.835,0.800). Bar = 10 μm