MIR34AHG and hepatocellular carcinoma: SMMC-7721 cell which had lower intrinsic Lnc34a level was transfected with Lnc34a overexpression lentiviral vector to upregulate its Lnc34a expression, while the HCC-LM3 cell with the high-intrinsic Lnc34a was transfected with shRNAlnc34a-1 or shRNAlnc34a-2 lentiviral vectors to down-regulate its Lnc34a level.