Fig. 4

Effect of NK cells on HIG2-silenced HepG2 and SMMC-7721 cells. a Purity of NK cells higher than 90% as determined by flow cytometry. b Apoptosis of HepG2 and SMMC-7721 cells in the siR-HIG2 group in comparison to the siR-NC group. c Fold change of LDH in supernatant of HepG2 and SMMC-7721 cells in the siR-HIG2 group before and after co-culture in comparison to the siR-NC group. *P < 0.05 compared with the siR-NC group of the same cell type