QRT-PCR results showed that linc-ROR increased progressively from normal human hepatocyte cell line (HH) to low metastatic HCC cell lines (HepG2 and SMMC-7721), and finally to highly metastatic HCC cell lines (HCCLM3 and MHCC97-H) (Fig. 2A)16. The gene discussed is LINC-ROR; the disease is hepatocellular carcinoma.