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The effect of hispidulin on TMZ-induced apoptosis in U87MG cells evaluated by the flow cytometer. (a) Flow cytometric analysis of annexin-V and propidium iodide (PI) double staining in U87MG cells. (b) Quantification results of apoptosis in U87MG cells. The data are expressed as the mean ± SD (n = 3). ∗P < 0.05 and ∗∗P < 0.01 vs. control.
