Fig. 6

In vitro cytotoxicity and apoptosis. a FCM images of PC-3 cells treated with PBS, US, PTX, PTX + US, ICG-PTX NBs and ICG-PTX NBs + US. b Cell viability of PC-3 cells treated with PBS, PTX, or ICG-PTX NBs with or without US irradiation. c Apoptosis of PC-3 cells treated with PBS, PTX, or ICG-PTX NBs with or without US irradiation. EA: early apoptosis, LA: late apoptosis, TA: total apoptosis. Each bar represents the mean ± SD of three experiments. *P < 0.05, **P < 0.01