“…Anticancer activity of ICG via the photodynamic effect has been studied in a number of cell lines, including HeCaT keratinocytes, HT-29 human colon cancer, SCL1 and SCL2 squamous cell carcinoma, N1 fibroblasts, human SKMEL 188 melanoma, mouse S91 melanoma, human skin Sk-Mel-28 melanoma, and MDA-MB231 breast cancer cells [13,14,15,18,20,21,36]. For example, with 24 h drug-incubation and a light dose of 24 J/cm 2 , the IC 50 values of ICG were reported to be 20.1, 43.9, 61.8, and 62.3 μM in HaCaT, SCL1, SCL2, and N1 cells, respectively [36].…”