UGP2 and hepatocellular carcinoma: In addition, GSEA also revealed that gene sets negatively correlated with the survival of HCC patients were enriched in the group with low UGP2 expression levels (P < 0.001; Figure 4(e)), while gene sets positively correlated with the survival of HCC patients were enriched in the group with high UGP2 expression levels (P < 0.001; Figure 4(f)).