PTEN and hepatocellular carcinoma: MiR-32 activated sphosphoinositide 3-kinase (PI3K) signaling in bone marrow-derived mesenchymal stem cells [28], colorectal cancer cells [29], and hepatocellular cancer cells [31] by suppressing PTEN levels via targeting the 3′ untranslated region (UTR)of PTEN mRNA.