PTEN and liver cancer: To identity whether CUDR, cyclinD1, PTEN depletion synergistically altered the telomere activity through H19, we first constructed the stable liver cancer stem cell lines, including pCMV6-A-GFP, pCMV6-A-GFP-CUDR, pCMV6-A- GFP-CUDR plus pcDNA3.1-CyclinD1, pCMV6-A-GFP-CUDR plus pGFP-V-RS-PTEN, pCMV6-A-GFP plus pGFP-V-RS-H19, pCMV6-A-CUDR plus pGFP-V-RS-H19, pCMV6-A-GFP-CUDR plus pcDNA3.1-CyclinD1 plus pGFP-V-RS-H19, pCMV6-A-GFP-CUDR plus pGFP-V-RS PTEN plus pGFP-V-RS-H19.