Western blot analyses were performed as previously described (22 (link)). Immunoblotting was carried out with antibodies against human BRCA-1 (catalog no. 9010), DNMT-1 (catalog no. 5119), cyclin D1 (catalog no. 92G2), phospho-p53-(Ser20) (catalog no. 9287), and GAPDH (catalog no. 2118) obtained from Cell Signaling Technology, and ERĪ± (catalog no. sc-542) obtained from Santa Cruz Biotechnology. Immunocomplexes were detected by using enhanced chemiluminescence (GE Healthcare Life Sciences). The GAPDH protein was used as an internal control for normalization of protein expression.