HDAC9 and B-cell chronic lymphocytic leukemia: In contrast, autophagy in CLL cells is inhibited by the DNA damaging antitumor agent chlorambucil [12], the histone deacetylase (HDAC) inhibitors chidamide [9] and MGCD0103 [22], the small-molecule sirtuin inhibitor Tenovin-6 (Tnv-6) [13,21], the plant-derived sesquiterpene α-bisabolol (α-BSB) [23], and the microRNA (miRNA) miR-130a [24].