ATG4D and hepatocellular carcinoma: Xu et al. found that autophagy was suppressed by miR-101 in the HepG2 HCC cell line via targets, including ras-related protein rab-5A (RAB5A), stathmin 1 (STMN1) and autophagy related 4D, cysteine peptidase (ATG4D) (61).