Introduction:The difficulty in treating lung adenocarcinoma(LUAD)is caused by a shortage of knowledge about the biological mechanisms and a lack of treatment choices.Objectives:The aim of this study was to identify a ...Introduction:The difficulty in treating lung adenocarcinoma(LUAD)is caused by a shortage of knowledge about the biological mechanisms and a lack of treatment choices.Objectives:The aim of this study was to identify a valuable molecular target for the treatment of LUAD.Methods:Using multiple databases,we screened for hub genes in LUAD using Cytoscape and explored the expression and prognosis of DLG associated protein 5(DLGAP5)in LUAD.We investigated the genetic variation,functional enrichment,and epigenetic activity of DLGAP5.Furthermore,we evaluated the relationship between the tumor microenvironment(TME)and DLGAP5.Results:Our study identified 10 hub genes in LUAD:CDC45,KIAA0101,DLGAP5,CDT1,NCAPG,CCNB1,CDCA5,CDC20,KIF11,and AURKA.We discovered that DLGAP5 was overexpressed and associated with poor prognosis in LUAD.DLGAP5 exhibited an overall genetic variation frequency of 2%,and its DNA promoter was hypomethylated in LUAD(p<0.05).The expression of DLGAP5 in LUAD showed a positive correlation with the majority of N6-methyladenosine(m6A)-methylation genes.Additionally,DLGAP5 was primarily associated with the cell cycle in LUAD.Notably,there was a significant favorable association between DLGAP5 and CD274,CTLA4,HAVCR2,and LAG3 in LUAD.Conclusion:DLGAP5 may be a therapeutic target for LUAD,as it affects cancer cells proliferation and development through the regulation of cell-cycle checkpoints and modulation of immune cell infiltration and immune checkpoints in the TME.展开更多
Discs大同源相关蛋白5(Discs large homologous affinity protein 5,DLGAP5)是泛素-蛋白酶体途径调控的有丝分裂磷酸化蛋白,在细胞癌变过程中为细胞周期调节因子。DLGAP5的过表达不仅导致异常的细胞周期调控而且引起细胞有丝分裂过程的...Discs大同源相关蛋白5(Discs large homologous affinity protein 5,DLGAP5)是泛素-蛋白酶体途径调控的有丝分裂磷酸化蛋白,在细胞癌变过程中为细胞周期调节因子。DLGAP5的过表达不仅导致异常的细胞周期调控而且引起细胞有丝分裂过程的病理改变。本文综述DLGAP5的致病机制及其在NSCLC中的临床应用价值。展开更多
目的探讨DLGAP5(discs large homolog associated protein 5)基因在肾透明细胞癌(kidney renal clear cell carcinoma,KIRC)患者中的表达水平、与T细胞免疫的关系、相关临床预后意义、基因突变水平以及甲基化程度(表观遗传学方面),以提...目的探讨DLGAP5(discs large homolog associated protein 5)基因在肾透明细胞癌(kidney renal clear cell carcinoma,KIRC)患者中的表达水平、与T细胞免疫的关系、相关临床预后意义、基因突变水平以及甲基化程度(表观遗传学方面),以提供一种更新的肾透明细胞癌的早期诊断方法及相应治疗方案。方法通过在UCSC Xena数据库下载并分析KIRC相关基因表达样本数据共607例,其中,正常样本72例,肿瘤样本535例,且所有样本表达DLGAP5基因。明确DLGAP5基因在肾透明细胞癌组织与正常肾组织之间的表达差异,探究肾透明细胞癌患者DLGAP5基因表达与T淋巴细胞和T细胞表达基因之间的相关性,研讨DLGAP5基因突变水平以及甲基化水平,探讨DLGAP5基因对于肾透明细胞癌预后的预测能力。结果DLGAP5基因在肾透明细胞癌细胞中的表达水平明显高于其在正常肾脏组织中的表达水平;DLGAP5低表达组(n=266)总生存数明显优于DLGAP5基因高表达组(n=265)的患者(P=0.001),尤以明确KIRC诊断后的第1年变化程度最为明显,其中,DLGAP高表达组死亡51人,而DLGAP5低表达组仅死亡40人。12年后,DLGAP5高表达组患者全部死亡,而DLGAP5低表达组中仍有1人存活;DLGAP5基因在经过单因素独立预后分析(P<0.001)和多因素独立预后分析(P=0.001)后,可确定为肾透明细胞癌的高风险独立预后因子;DLGAP5基因表达量与CD8~+T细胞含量(Rho=0.298,P<0.001)、CD2免疫基因表达量(Rho=0.393,P<0.001)、CD3D免疫基因表达量(Rho=0.354,P<0.001)呈正相关关系以及CD3E免疫基因表达量(Rho=0.353,P<0.001)呈正相关;DLGAP5的基因突变水平无法作为患者预后的诊断指标;cg10130446甲基化位点的甲基化程度与患者预后呈负相关(P=0.006),DLGAP5的cg10130446甲基化位点可作为患者预后判断的生物学指标和新的治疗靶点。结论DLGAP5基因在肾透明细胞癌细胞中的表达水平明显高于其在正常肾脏组织中的表达水平;DLGAP5基因低表达组总生存期明显优于DLGAP5基因高表达组的患者;DLGAP5基因在经过单因素独立预后分析和多因素独立预后分析后,可确定为肾透明细胞癌的高风险独立预后因子;DLGAP5基因表达量与CD8^(+)T细胞含量,CD2免疫基因表达量,CD3D免疫基因表达量以及CD3E免疫基因表达量呈正相关;DLGAP5的基因突变水平无法作为患者预后诊断指标;DLGAP5基因与肾透明细胞癌患者的不良预后相关,cg10130446甲基化位点可以作为肾透明细胞癌的独立危险因素以及新的治疗靶点。展开更多
Objective:The main reasons for the poor prognoses of pancreatic adenocarcinoma(PA)patients are rapid early-stage progression,advanced stage metastasis,and chemotherapy resistance.Identification of novel diagnostic and...Objective:The main reasons for the poor prognoses of pancreatic adenocarcinoma(PA)patients are rapid early-stage progression,advanced stage metastasis,and chemotherapy resistance.Identification of novel diagnostic and prognostic biomarkers of PA is therefore urgently needed.Methods:Three mRNA microarray datasets were obtained from the Gene Expression Omnibus database to select differentially expressed genes(DEGs).Gene Ontology(GO)and Kyoto Encyclopedia of Genes and Genomes pathway enrichment analyses for hub genes were performed using DAVID.Correlations between expression levels of hub genes and cancer-infiltrating immune cells were investigated by TIMER.Cox proportional hazard regression analyses were also performed.Serum hub genes were screened using the HPA platform and verified for diagnostic value using ELISAs.Results:We identified 59 hub genes among 752 DEGs.GO analysis indicated that these 59 hub genes were mainly involved in the defense response to viruses and the type I interferon signaling pathway.We also discovered that RSAD2 and SMC4 were associated with immune cell infiltration in the PA microenvironment.Additionally,DLGAP5 mRNA might be used as an independent risk factor for the prognoses of PA patients.Furthermore,the protein encoded by ISG15,which exists in peripheral blood,was validated as a potential diagnostic biomarker that distinguished PA patients from healthy controls(area under the curve:0.902,95%confidence interval:0.819–0.961).Conclusions:Our study suggested that RSAD2 and SMC4 were associated with immune cell infiltration in the PA microenvironment,while DLGAP5 mRNA expression might be an independent risk factor for the survival prognoses of PA patients.Moreover,ELISAs indicated that serum ISG15 could be a potential novel diagnostic biomarker for PA.展开更多
基金funded by the supporting funds for scientific research of the Sixth Affiliated Hospital,Sun Yat-sen University(P20200217202404781).
文摘Introduction:The difficulty in treating lung adenocarcinoma(LUAD)is caused by a shortage of knowledge about the biological mechanisms and a lack of treatment choices.Objectives:The aim of this study was to identify a valuable molecular target for the treatment of LUAD.Methods:Using multiple databases,we screened for hub genes in LUAD using Cytoscape and explored the expression and prognosis of DLG associated protein 5(DLGAP5)in LUAD.We investigated the genetic variation,functional enrichment,and epigenetic activity of DLGAP5.Furthermore,we evaluated the relationship between the tumor microenvironment(TME)and DLGAP5.Results:Our study identified 10 hub genes in LUAD:CDC45,KIAA0101,DLGAP5,CDT1,NCAPG,CCNB1,CDCA5,CDC20,KIF11,and AURKA.We discovered that DLGAP5 was overexpressed and associated with poor prognosis in LUAD.DLGAP5 exhibited an overall genetic variation frequency of 2%,and its DNA promoter was hypomethylated in LUAD(p<0.05).The expression of DLGAP5 in LUAD showed a positive correlation with the majority of N6-methyladenosine(m6A)-methylation genes.Additionally,DLGAP5 was primarily associated with the cell cycle in LUAD.Notably,there was a significant favorable association between DLGAP5 and CD274,CTLA4,HAVCR2,and LAG3 in LUAD.Conclusion:DLGAP5 may be a therapeutic target for LUAD,as it affects cancer cells proliferation and development through the regulation of cell-cycle checkpoints and modulation of immune cell infiltration and immune checkpoints in the TME.
文摘Discs大同源相关蛋白5(Discs large homologous affinity protein 5,DLGAP5)是泛素-蛋白酶体途径调控的有丝分裂磷酸化蛋白,在细胞癌变过程中为细胞周期调节因子。DLGAP5的过表达不仅导致异常的细胞周期调控而且引起细胞有丝分裂过程的病理改变。本文综述DLGAP5的致病机制及其在NSCLC中的临床应用价值。
基金supported by grants from the Natural Science Foundation of Tianjin City in China(Grant Nos.18JCYBJC25400 and 18JCZDJC32600)and the National Natural Science Foundation of China(Grant No.81802432).
文摘Objective:The main reasons for the poor prognoses of pancreatic adenocarcinoma(PA)patients are rapid early-stage progression,advanced stage metastasis,and chemotherapy resistance.Identification of novel diagnostic and prognostic biomarkers of PA is therefore urgently needed.Methods:Three mRNA microarray datasets were obtained from the Gene Expression Omnibus database to select differentially expressed genes(DEGs).Gene Ontology(GO)and Kyoto Encyclopedia of Genes and Genomes pathway enrichment analyses for hub genes were performed using DAVID.Correlations between expression levels of hub genes and cancer-infiltrating immune cells were investigated by TIMER.Cox proportional hazard regression analyses were also performed.Serum hub genes were screened using the HPA platform and verified for diagnostic value using ELISAs.Results:We identified 59 hub genes among 752 DEGs.GO analysis indicated that these 59 hub genes were mainly involved in the defense response to viruses and the type I interferon signaling pathway.We also discovered that RSAD2 and SMC4 were associated with immune cell infiltration in the PA microenvironment.Additionally,DLGAP5 mRNA might be used as an independent risk factor for the prognoses of PA patients.Furthermore,the protein encoded by ISG15,which exists in peripheral blood,was validated as a potential diagnostic biomarker that distinguished PA patients from healthy controls(area under the curve:0.902,95%confidence interval:0.819–0.961).Conclusions:Our study suggested that RSAD2 and SMC4 were associated with immune cell infiltration in the PA microenvironment,while DLGAP5 mRNA expression might be an independent risk factor for the survival prognoses of PA patients.Moreover,ELISAs indicated that serum ISG15 could be a potential novel diagnostic biomarker for PA.