Figure 2.

Near-infrared radiation induces caspase-3 activation.(A) KP4 cells cultured in 96-well plates were irradiated with a 915 nm laser at different powers and for various durations. Then, 2 h later, caspase-3 activation was evaluated in the cells. Representative pictures are presented. (B) The graph indicates the percentage of cells with active caspase-3. A total of 5 independent fields were selected for evaluation, and 3 independent experiments were performed. 4W7m, cells treated with a 4-Watt laser for 7 min; 5W7m, cells treated with a 5-Watt laser for 7 min.