In hepatocellular carcinoma, NR2F1-AS1 is upregulated in tumor tissues, patient serum, and cell lines, including SNU-398, BEL-7402, HepG2, Hep3B, Huh-7, MHCC97-H, and SK-Hep-1. The gene discussed is NR2F1; the disease is hepatocellular carcinoma.