Figure 3From: Gold (I) N-heterocyclic carbene complex inhibits mouse melanoma growth by p53 upregulationElucidation of the ROS mediated, mitochondrial death pathway upon caspase activation. A, Expression of various apoptotic proteins following treatment of cells with complex 3 for 24 h, with β-Actin as loading control. B, Densitometric analysis of proteins detected by Western blot. C, Determination of caspase 9 and 3 activities at 405 nm, following treatment of cells with complex 3 for 24 h. D, Determination of caspase 9 and 3 activities at 405 nm in cells, incubated 1 h with Z-LEHD-FMK and Z-DEVD-FMK prior to treatment with complex 3 for 24 h. E, Percentage of growth inhibition of cells following incubation with caspase inhibitors Z-LEHD-CHO and Z-DEVD-CHO (for caspase 9 and caspase 3 respectively), along with complex 3 for 24 h. F, Cytochrome c release into the cytosol after treatment of cells with complex 3 as determined at 450 nm assay. G, Loss of ∆ψm of complex 3 treated cells after 24 h. H, Flowcytometric analysis of loss of ∆ψm in presence of complex 3 after 24 h. I, ROS generation upon treatment of complex 3 for 6, 12 and 24 h at 529 nm. J, ROS generated in cells treated with complex 3 and with varying concentrations of NAC (0.2, 1, 5 and 10 μM) after 24 h at 529 nm. K, Percentage growth inhibition of cells in presence or absence of either complex 3 or NAC or in presence of both of them. L, Flowcytometric analysis ROS generation in cells following treatment with complex 3 along with NAC after 24 h. Values are mean ± S.D and represent one of the 3 representative experiments. *P < 0.05, **P < 0.01 and ***P < 0.001.Back to article page