Figure 5

Cells were incubated with (A) PBS, (B) pGO, (C) pGO-Pt, (D) pGO-DOX, (E) pGO-Pt/DOX, and (F) Pt/DOX mixture. Four hours later, cells were double-stained with Annexin V/PI and analyzed by FACS. (G) The quantitative analysis of cell apoptosis. Bars, mean ± SD (n = 6). *p < 0.05; NS p > 0.05 compared with other group.