Figure 6

Nuclei morphological changes during PTO and DDPT-induced apoptosis in PC3 and Bcap-37 cells detected by TUNEL assay. Tumor cells treated with PTO and DDPT (20 μ M) were assayed by TUNEL and observed under light microscopy. For PC3 cells group, A: negative control (without treatment); C: positive control, treated with HCPT (20 μ M) for 24 h; B and D: treated with PTO and DDPT (20 μ M) for 24 h; For Bcap-37 cells group, A': negative control (without treatment); C': positive control, treated with HCPT (20 μ M) for 24 h; B' and D': treated with PTO and DDPT (20 μ M) for 24 h.