CASP3 and hepatocellular carcinoma: Furthermore, Annexin V/PI staining (Figure 6H-I), the trypan blue exclusion cell viability test(Figure 6J), and caspase 3 activity assay (Figure 6K) showed that the decrease of apoptosis in HepG2 HCC cells under suspension conditions due to 14-3-3σ overexpression was reversed by the ERK1/2 inhibitor U0126.