Inhibition of HDAC activity, regulation of histone methylation, and reduction in H1 histone phosphorylation [146]Inhibition of the activity of DNMTs, mainly DNMT1, -3a, and -3b, in cervical, prostate, and breast tumor cell lines [149,150]Regulation of the expression of several miRNAs in different human tumors [137,147]. Here, HDAC9 is linked to breast neoplasm.