基于TCGA数据库分析JMJD6在肝癌组织中的表达及临床意义

目的:分析JMJD6在肝癌中的表达及与预后的关系。方法:从TCGA数据库中下载肝癌患者的mRNA表达数据及患者临床信息。利用Wilcoxon检验比较肝癌组织和正常组织中JMJD6的表达差异,单因素Logistic回归分析JMJD6表达量与临床特征的关系。通过Kaplan-Meier法和Cox回归分析JMJD6表达量与患者生存率的关系。将肝癌组织分成JMJD6高表达组和低表达组并进行基因集富集分析(GSEA)。结果:与正常组织相比,JMJD6在肝癌组织中高表达(W=2 506,P<0.001),且表达量与临床分期和病理分级相关(均P<0.05)。JMJD6高表达导致患者生存率下降(χ²=5.541,P<0.05),并且是肝癌患者预后的独立危险因素(HR=1.109,95%CI:1.039～1.184,P<0.01)。此外,GSEA结果显示JMJD6高表达组在DNA复制、RNA剪接等通路富集,低表达组在脂肪酸和氨基酸代谢通路富集。结论:JMJD6高表达与肝癌的发生、发展及患者不良预后相关。

The expression and clinical significance of JMJD6 in hepatocellular carcinoma based on TCGA database

Objective:To analyze the expression of JMJD6 in hepatocellular carcinoma（HCC） and its relationship with prognosis. Methods:The mRNA expression data and clinical information of patients with HCC were downloaded from The Cancer Genome Atlas（TCGA） database. The expression of JMJD6 in HCC tissues and normal tissues was compared by Wilcoxon Test，and univariate Logistic regression analysis was used to analyze the relationship between JMJD6 expression and clinical features. The relationship between JMJD6 expression and patient survival was analyzed by Kaplan-Meier method and Cox regression analysis. Gene set enrichment analysis（GSEA） was performed in the high and low expression groups of JMJD6. Results: Compared with normal tissues，the expression of JMJD6 was up-regulated in HCC tissues（Wilcoxon test，W=2 506，P＜0.001） and the expression level was correlated with clinical stage and pathological grade （all P＜0.05）. The high expression of JMJD6 was related to adverse prognosis of HCC（χ2=5.541，P＜0.05），and the expression of JMJD6 could be an independent factor affecting the survival of patients （HR=1.109，95%CI:1.039-1.184，P＜0.01）. In addition，GSEA results showed that JMJD6 high expression group was enriched in DNA replication and RNA splicing pathways，while JMJD6 low expression group was enriched in fatty acid and amino acid metabolism pathways. Conclusion: The high expression of JMJD6 is associated with the occurrence and development of HCC and the adverse prognosis of patients.