A1. G9a level of cells in each group detected by western blot analysis.
	Blank	OGD	OGD+S	OGD+S+oe-NC	OGD+S+oe-G9a	F value	DF
Relative G9a protein level	0.16±0.04	0.83±0.05*	0.41±0.07**	0.46±0.02	0.79±0.07***	82.29	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.