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. 2017 Jun 5;9(6):63. doi: 10.3390/cancers9060063

Figure 3.

Figure 3

Light-dose response curves (A–D) for cell viability of A549 cells treated with the combination of ICG-PDT and VP-16. Cells were treated with ICG and VP-16 for 4 h after overnight incubation and then irradiated with an 800 nm laser at a light dose of 100 J/cm2. Cell viability was measured by the standard MTT assay. The solid lines are best fits to the experimental data using a logistic function in Origin software. The dashed lines and filled stars represent the calculated additive effect.