Figure 10.

Cytotoxicity of (a) trans-2 and (b) cis-2 nonirradiated and irradiated upon internalization by the 4T1 cells after 48 h of culture in DMEM–high glucose determined with the MTT test. The cells were irradiated directly after complex uptake for 5 and 200 s to convert the trans photoisomer into the cis one and vice versa, respectively. The numbers denote the irradiated/nonirradiated viability ratios at a respective uptake time. Statistically significant differences are indicated with asterisks above the bars (difference from the control) and above the brackets (difference between nonirradiated and irradiated photoisomers), *p < 0.05.