CD44 and neoplasm: Treatment of different tumor cells, DU145, LNCaP, and MCF-7 cells, with the demethylation agent 5-aza-CdR changed the histone code and methyl cytosine phosphate guanine (CpG)-binding domain protein (MBD) profile at the promoter regions of CD44, Cyclin D2, GLIPR1, and PTEN.