Table 1.

DNA methylation status of the ERα promoter

Cells	Percentage of methylated CpG island in the ER promoter (%)	P value compared with untreated MDA-MB-231 cells
MCF-7	0	-
Untreated MDA-MB-231	44.8 ± 3.75*	-
EGCG-treated MDA-MB-231	48.2 ± 4.45*	0.36

* Standard deviations