The RT‐PCR results demonstrated that mRNA expression levels of SLC7A11, SLC1A5, and GCLM were notably up‐regulated and SAT1 was down‐regulated in HCC patients' tumor tissues compared with their ANLTs (Figure 7A), which were consistent with the results from TCGA database analysis (Figure 7B). The gene discussed is SLC1A5; the disease is hepatocellular carcinoma.