Fig. 2

TMPyP4 induced cell apoptosis in human cervical cancer cells. Human cervical cancer cells were treated with 1, 5, 10 or 20 μM TMPyP4 for 24 h, the apoptotic rates (a), and caspase-3 activity (b) in cells was determined. The apoptotic rates of human normal cervical cells treated with 1, 5, 10 or 20 μM TMPyP4 for 24 h were tested by FCM (c). Data are expressed as mean ± SD of three independent experiments in six replicates. *P < 0.05 or **P < 0.01 indicates significance, P > 0.05 means no difference