Figure 4. A and B: Apoptotic and necrotic cell death after 24 h of 50 μM cisplatin, etoposide and cycloartobiloxanthone treatments were examined by Hoechst 33342/propidium iodide (PI) co-staining. C: Percentage of apoptotic and necrotic nuclei in each treatment group. Data are presented as the mean±SD (n=3). *Significantly different at p<0.05 compared to the untreated control group.