Figure 6From: Paclitaxel and etoposide co-loaded polymeric nanoparticles for the effective combination therapy against human osteosarcoma Flow cytometer analysis of cell apoptosis using annexinV-FITC and PI staining. The MG63 cells were exposed with free PTX, free ETP, free PTX/ETP, and PTX-ETP/PLGA NP at a concentration of 1000 ng/ml and incubated for 20 h. **p < 0.01 is the statistical difference between the combinational nanoparticles and individual free drugs.Back to article page