KPNA2 and hepatocellular carcinoma: KPNA2 is predicted as a direct target of miR-139 by bioinformatic tools and several high-throughput studies also indicated that miR-139 could target KPNA2 [24–26]; therefore we investigated whether miR-139 could target KPNA2 and whether KPNA2 contributed to the cellular functions of miR-139 in HCC.