FDX1 and hepatocellular carcinoma: Recently, there has been a growing number of studies on the correlation between cuproptosis and tumors, including one on cuproptosis and hepatocellular carcinoma, it is indicated that the key protein FDX1 of copper death is down-regulated in hepatocellular carcinoma, suggesting that it may appear as a protective factor in cancer, and its high expression may be associated with longer survival time.