Studies by Srivastava et al. shown that MS-275, a histone deacetylase (HDAC) inhibitors, could sensitize TRAIL-resistant breast cancer xenografts through the involvement of both cell-extrinsic and cell-intrinsic pathways of apoptosis[47] and resveratrol regulates the expression of FOXO's target genes such as Bim, TRAIL, DR4, DR5, cyclin D1 and p27/KIP1 [48,49]. Here, HDAC9 is linked to breast cancer.