Comprehensive analysis of the prognosis and tumor immune microenvironment of ubiquitin-conjugating enzyme transport-related gene UBE2C in hepatocellular carcinoma.

Ubiquitin-conjugating enzyme E2 C (UBE2C) is involved in tumor progression and cellular processes in many cancers and is implicated in cell cycle regulation. However, its prognostic significance in Hepatocellular carcinoma (HCC) and the mechanism of tumor immune response are unknown. The expression of UBE2C genes in HCC and normal tissue samples was investigated based on The Cancer Genome Atlas (TCGA) LIHC dataset and validated by Gene Expression Omnibus and Human Protein Atlas. Subsequently, the relationship between UBE2C gene expression, clinicopathologic parameters, and each survival period was investigated by regression analysis and Kaplan-Meier survival curves. The set of genes co-expressed with UBE2C was constructed and subjected to genomic enrichment analysis, GO and KEGG pathway enrichment analysis. Finally, the relationship between UBE2C gene expression and immune cell infiltration, immunosuppressive molecules in tumor samples from the TCGA-LIHC dataset was investigated. UBE2C gene expression levels were significantly higher in HCC samples compared to normal samples (p < 0.05). Higher UBE2C gene expression was closely associated with higher tumor grade and later tumor stage. The results of Kaplan-Meier survival curves showed that the survival of HCC patients with high UBE2C expression was shorter than that of patients with low UBE2C expression (p < 0.05, HR(CI) = 1.870[1.276, 2.741]). The results of PPI showed a high correlation between cell cycle-related proteins and UBE2C gene expression. Additionally, the highly expressed UBE2C gene was associated with an increased number of immunosuppressive molecules. UBE2C is an independent predictive marker for HCC patients, and the prognostic value of survival is improved when combined with clinical stage information. This study reveals its potential as a prognostic biomarker and as a new target for HCC intervention.