For apoptosis-necrosis detection Melanoma 7 cells (n.s., sh-caut1 and 2) were treated with cisplatin for 48 h. Then cells were detached, centrifuged and washed with ice cold PBS. Thereafter cells were stained with APC-Annexin V (BD-Pharmingten) in 1x binding buffer (BD-Pharmingten) for 30 min at 4°C. Then Propidium Iodide Solution (Sigma-Aldrich) was added and Flow cytometry analysis was performed using Accuri Flow Cytometer and CFlow plus software (BD Biosciences).
Cytochrome c release assay was performed with the InnoCyte Flow Cytometric cytochrome c release Kit from Millipore (Billerica, MA, USA). Melanoma 7 cells (sh-catu2 and n.s.) were treated with different concentrations of cisplatin for 6 hours. Permeabilization, fixation and staining of the cells were performed according to the manufacturer’s instructions. Cells were analyzed using Accuri Flow Cytometer and CFlow plus software (BD Biosciences).