HDAC9 and embryonal rhabdomyosarcoma: Vorinostat has been applied to zebrafish models of embryonal rhabdomyosarcoma (ERMS) and the HDAC inhibitor is able to increase the acetylation of histones H3 and H4 in zebrafish ERMS tumors (50 μM Vorinostat/SAHA; Vleeshouwer-Neumann et al., 2015).