Figure 3. Effects of cis-UCA and UV irradiation on viability. The non-irradiated (C) and UV-irradiated (UV) HCE-2 cells (A) and HCECs (B) were exposed to different concentrations of cis-UCA for up to 72 h. For statistical analysis, cis-UCA samples and cis-UCA+UV samples were compared with C samples. An asterisk indicates p<0.05, and a double asterisk denotes p<0.001 (n=6 dishes).