PTEN and hepatocellular carcinoma: XIST was shown to exhibit tumor suppressive properties in hepatocellular carcinoma (HCC) by acting as a miRNA decoy for tumor suppressor genes, SMAD7 (SMAD family member 7) and PTEN, by sponging miR-92b and miR-181a, respectively, and suppressing cell proliferation, metastasis, and invasion [76,77].