Figure 6. P123-PEG2000-DSPE (Dox) induced cell apoptosis in MCF-7R cells. Cell apoptosis rate of MCF-7R cells treated with PBS (control), Dox, PEG2000-DSPE (Dox) or P123-PEG2000-DSPE (Dox) by flow cytometry analysis. **P < 0.01 and ***P < 0.001 vs. control group; ###P < 0.001 vs. Dox group; &&P < 0.01 vs. PEG2000-DSPE (Dox) group.