CREM在胃癌中高表达并与患者的不良预后相关

High expression of CREM is associated with poor prognosis in gastric cancer patients

目的分析CREM在胃癌中的表达及其与临床预后的相关性。方法利用TCGA和GEO数据库分析胃癌和癌旁组织CREM mRNA表达差异,免疫组化染色(IHC)分析43例胃癌和配对癌旁组织的CREM蛋白表达差异,分析CREM表达与胃癌患者临床病理特征之间的关系;采用Kaplan-Meier生存分析探讨CREM表达水平与胃癌患者生存期之间的关系;利用LinkedOmics数据库注释CREM相关基因的GO功能和KEGG通路的富集情况。结果数据库分析显示,CREM在胃癌组织中高表达(P<0.05),与胃癌患者的不良预后正相关(P=0.01)。IHC结果显示,与癌旁组织相比,胃癌组织中CREM高表达(P<0.0001),CREM表达水平与T分期和N分期有关(P<0.05),CREM高表达的胃癌患者总生存期更短(RR=4.02,P=0.0046)。基因富集分析显示,CREM可能通过细胞黏附分子介导的信号通路促进胃癌发生发展。结论CREM在胃癌中高表达提示不良预后,CREM可作为候选的胃癌预后指标。

Objective To analyze the expression of CREM in gastric cancer(GC)and its correlation with prognosis of the patients.Methods TCGA and GEO databases were used to analyze the expression levels of CREM mRNA in GC and adjacent tissues.Immunohistochemistry was used to examine the expression of CREM protein in 43 pairs of GC and adjacent tissues,and the correlation of CREM expression with clinicopathological features of the patients was analyzed.Kaplan-Meier survival analysis was used to explore the relationship between CREM expression and survival of GC patients.LinkedOmics database was used to annotate the GO function and KEGG pathway enrichment of CREM-related genes.Results Database analysis showed that CREM was highly expressed in GC tissues(P<0.05)and positively correlated with poor prognosis in GC patients(P=0.01).Immunohistochemistry results showed significantly higher CREM expression in GC tissues than in paired adjacent tissues(P<0.0001),and its expression level was correlated with T-stage and N-stage of the tumor(P<0.05).The overall survival of GC patients with high expression of CREM was shorter(RR=4.02,P=0.0046).Gene enrichment analysis showed that high CREM expression promotes occurrence and progression of GC very likely through the cell adhesion signaling pathway.Conclusion CREM is highly expressed in GC,and its high expression is associated with a poor prognosis of GC patients,suggesting the potential of CREM to serve as a prognostic indicator for GC.