Figure 2.

Effects of Ce6-PDT on the ROS level in human colon cancer SW480 cells. A. SW480 cells were treated with Ce6 at 0, 0.125, 0.25, 0.5, and 2.0 μg/ml, respectively, followed by photodynamic irradiation at 650 nm (6 J/cm²). SW480 cells free from intervention were used as the blank control, cells treated with 0.5 μg/ml Ce6 without photodynamic irradiation were used as the negative control, and cells treated with ROS inducer were used as the positive control. The ROS level was measured with fluorescence probe. B. Statistical analysis of the fluorescence intensities indicating ROS level in SW 480 cells. Compared with the blank control group, *P < 0.05; compared with the previous group, #P < 0.05.