Romeo et al. obtained similar results, where the HDAC inhibitor VPA, and trichostatin A (TSA), disrupted the interplay between mutp53 and HSP70, resulting in the downregulation of CHK1 and RAD51, sensitizing pancreatic cancer cells to the AZD2461 PARP inhibitor [20]. This evidence concerns the gene HDAC9 and familial pancreatic carcinoma.