Gambogic acid induces apoptosis and inhibits colorectal tumor growth via mitochondrial pathways

Figure 4 Quantification of gambogic acid-induced apoptosis by flow cytometry. A: HT-29 cells were treated for 48 h and sorted by flow cytometry to detect early (FITC-stained, lower right quadrant) and late [FITC- and propidium iodide (PI)-stained, upper right quadrant] apoptotic cells; B: The experiment was repeated three times and the average percentage of apoptotic cells (mean ± SE) is shown. ^aP < 0.05 vs 0 μmol/L. GA: Gambogic acid.