Immunoblot analysis was done as previously described (19 (link)) using antibodies directed against ATDC (Santa Cruz Biotechnology), PTEN and RELA (Cell Signaling Technology, Danvers, MA), DNMT3A and DNMT3B (Santa Cruz Biotechnology), at a 1:1000 dilution. β-actin antibody (Sigma, St Louis, MD) served as a loading control.