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. 2015 Jun 19;10(3):1836–1840. doi: 10.3892/ol.2015.3399

Figure 1.

Figure 1.

Near-infrared irradiation promotes apoptosis of KP4 cells. (A) KP4 cells cultured in 96-well plates were irradiated with a 915 nm laser at different powers and for various durations; 24 h later, the cells were subjected to the TUNEL assay to detect apoptotic cells. Representative pictures of the TUNEL assay are presented. (B) TUNEL positive cells were counted, and the graph indicates the percentage of TUNEL positive cells. A total of 5 independent fields were selected for evaluation, and 3 independent experiments were performed. 3W3m, cells treated with a 3-Watt laser for 3 min; 3W5m, cells treated with a 3-Watt laser for 5 min; 3W7m, cells treated with a 3-Watt laser for 7 min; 4W3m, cells treated with a 4-Watt laser for 3 min; 4W5m, cells treated with a 4-Watt laser for 5 min; 4W7m, cells treated with a 4-Watt laser for 7 min; 5W3m, cells treated with a 5-Watt laser for 3 min; 5W5m, cells treated with a 5-Watt laser for 5 min; 5W7m, cells treated with a 5-Watt laser for 7 min. P<0.05 between control and 4W7m or 5W7m.