Figure 4. The cell proliferation and death were measured by CCK-8 (A) and Trypan Blue exclusion assays (B). (A) The cell viability were measured using CCK-8 assay. (B) The death cell population was analyzed using Trypan Blue dye exclusion assay. Data are presented as the mean ± SD. **p < 0.01, *p < 0.05 vs. Vector group.