Figure 6.

Effect of TMPyP4, TiO₂ NPs, and TMPyP4/TiO₂ complex on the metabolic activity/cell viability of cells. The graphs present the relative mitochondrial dehydrogenase activity of treated human Mel-Juso and CCD-1070Sk cells under dark (A–C) and light-irradiation conditions (D–F). Untreated cells (0 μg/mL) were used as control. Results (control vs. sample) were significant at p < 0.05 (*), p < 0.01 (**), and p < 0.001 (***). Error bars reflect the standard deviation. Reproduced from ref. [125].