SOD1 and hepatocellular carcinoma: It has been shown that in Huh7.5 hepatoma cells and non-tumor HepaRG liver cells, there are no statistically significant differences in the expression levels of SOD1, SOD3, CAT (Figure 2a), GPx4 (Figure 2b), Prdx2, Prdx4, and Prdx6 (Figure 2c).