PDK2 and hepatocellular carcinoma: DUXAP8, MCM3AP-AS1 and CDKN2B-AS1 are over-expressed in HCC, could be ceRNAs through miR-422a/PDK2, miR-194-5p/FOXA1, and let-7c-5p/NAP1L1 to promote HCC, respectively [8–10].