Cisplatin sensitivity of TFAP2α silenced T24 and SW780. A and B: Transfection of 10-50 nM TFAP2α siRNA or control siRNA in T24 and SW780 cells, respectively. Real-time RT-PCR was used to determine the relative TFAP2α mRNA levels 48 h post transfektion. C and D: Transfection of 25 nM TFAP2α siRNA in T24 and SW780 cells, respectively. After 24 h incubation cisplatin or media was added to the cells. The viability of the cells was determined 96 h after transfection (48 h after the drug was added) by MTT-assay and expressed as the viability compared with the culture media control for both the TFAP2α siRNA or control siRNA transfected cells. E and F: As C and D using gemcitabine instead of cisplatin. (n = 6).