C. apoptosis rate of cells in each group detected by flow cytometry.
	Blank	OGD	OGD+S	OGD+S+oe-NC	OGD+S+oe-G9a	F value	DF
Apoptotic cells (%)	4.29±0.31	24.91±1.25*	13.29±0.79**	14.82±0.92	23.59±0.47***	316.4	4

One-way ANOVA was used to compare the mean difference among the five groups. Tukey’s multiple comparisons test was used for post hoc test,

^*p<0.001 between blank group and OGD group,

^**p<0.001 between OGD group and OGD+S group,

^***p<0.001 between OGD+S group and OGD+S+oe-G9a group.