BACKGROUND MUC16,encoding cancer antigen 125,is a frequently mutated gene in gastric cancer.In addition,MUC16 mutations seem to result in a better prognosis in gastric cancer.However,the mechanisms that lead to a bett...BACKGROUND MUC16,encoding cancer antigen 125,is a frequently mutated gene in gastric cancer.In addition,MUC16 mutations seem to result in a better prognosis in gastric cancer.However,the mechanisms that lead to a better prognosis by MUC16 mutations have not yet been clarified.AIM To delve deeper into the underlying mechanisms that explain why MUC16 mutations signal a better prognosis in gastric cancer.METHODS We used multi-omics data,including mRNA,simple nucleotide variation,copy number variation and methylation data from The Cancer Genome Atlas,to explore the relationship between MUC16 mutations and prognosis.Cox regression and random survival forest algorithms were applied to search for hub genes.Gene set enrichment analysis was used to elucidate the molecular mechanisms.Single-sample gene set enrichment analysis and“EpiDISH”were used to assess immune cells infiltration,and“ESTIMATE”for analysis of the tumor microenvironment.RESULTS Our study found that compared to the wild-type group,the mutation group had a better prognosis.Additional analysis indicated that the MUC16 mutations appear to activate the DNA repair and p53 pathways to act as an anti-tumor agent.We also identified a key gene,NPY1R(neuropeptide Y receptor Y1),which was significantly more highly expressed in the MUC16 mutations group than in the MUC16 wild-type group.The high expression of NPY1R predicted a poorer prognosis,which was also confirmed in a separate Gene Expression Omnibus cohort.Further susceptibility analysis revealed that NPY1R might be a potential drug target for gastric cancer.Furthermore,in the analysis of the tumor microenvironment,we found that immune cells in the mutation group exhibited higher anti-tumor effects.In addition,the tumor mutation burden and cancer stem cells index were also higher in the mutation group than in the wild-type group.CONCLUSION We speculated that the MUC16 mutations might activate the p53 pathway and DNA repair pathway:alternatively,the tumor microenvironment may be involved.展开更多
目的基于癌症基因组图谱(the cancer genome atlas,TCGA)数据库构建肝细胞癌(hepatocellular carcinoma,HCC)双硫死亡相关基因(disulfidptosis-related genes,DRGs)预后风险模型及评价。方法通过生物信息学方法分析TCGA数据库中371例HC...目的基于癌症基因组图谱(the cancer genome atlas,TCGA)数据库构建肝细胞癌(hepatocellular carcinoma,HCC)双硫死亡相关基因(disulfidptosis-related genes,DRGs)预后风险模型及评价。方法通过生物信息学方法分析TCGA数据库中371例HCC样本及50例癌旁样本中15个DRGs的表达情况,并进行基因本体(gene ontology,GO)功能注释和京都基因和基因组百科全书(Kyoto encyclopedia of genes and genomes,KEGG)富集分析、Kaplan-Meier(KM)生存分析;通过单因素COX回归分析筛选出有统计学意义的DRGs,通过LASSO回归分析及多因素COX回归分析筛选出关键DRGs构建预后风险模型,并根据风险评分将HCC患者分为高风险组和低风险组,制作KM生存曲线和时间依赖的受试者工作特征(receiver operator characteristic,ROC)曲线进行验证评价。结果与癌旁样本相比,HCC样本15个DRGs中FLNA,MYH9,TLN1,ACTB,MYL6,CAPZB,DSTN,ACTN4,SLC7A11,INF2,CD2AP,PDLIM1和FLNB均表达上调,且差异具有统计学意义(t=1793~6310,均P<0.001);经GO功能注释和KEGG富集分析显示,DRGs主要与肌动蛋白细胞骨架和细胞黏附相关的生物过程或途径密切相关。经KM生存分析结果显示,SLC7A11,INF2,CD2AP,MYL6,ACTB高表达组生存率低于低表达组[HR=1.46(1.03~2.07)~1.93(1.36~2.75),均P<0.05]。通过单因素COX回归分析、LASSO分析及多因素COX回归分析构建预后风险模型riskscore=(0.247×SLC7A11)+(0.289×INF2)+(0.076×CD2AP)+(0.06×MYL6);计算样本的风险评分,风险评分越高,预后不良的HCC患者人数越多;KM生存分析显示高风险组的总生存率比低风险组低;1,3,5年的AUC值分别为0.709,0.661和0.648;通过多因素COX回归分析表明SLC7A11[HR=1.832(1.274~2.636),P=0.001]是独立的预后危险因素。结论四个DRGs构建的预后风险模型在预测HCC患者预后情况有一定的作用。展开更多
Introduction:DNA polymerases are crucial for maintaining genome stability and influencing tumorigenesis.However,the clinical implications of DNA polymerases in tumorigenesis and their potential as anti-cancer therapy ...Introduction:DNA polymerases are crucial for maintaining genome stability and influencing tumorigenesis.However,the clinical implications of DNA polymerases in tumorigenesis and their potential as anti-cancer therapy targets are not well understood.Methods:We conducted a systematic analysis using TCGA Pan-Cancer Atlas data and Gene Set Cancer Analysis results to examine the expression profiles of 15 DNA polymerases(POLYs)and their clinical correlations.We also evaluated the prognostic value of POLYs by analyzing their expression levels in relation to overall survival time(OS)using Kaplan-Meier survival curves.Additionally,we investigated the correlations between POLY expression and immune cells,DNA damage repair(DDR)pathways,and ubiquitination.Drug sensitivity analysis was performed to assess the relationship between POLY expression and drug response.Results:Our analysis revealed that 14 out of 15 POLYs exhibited significantly distinct expression patterns between tumor and normal samples across most cancer types,except for DNA nucleotidylexotransferase(DNTT).Specifically,POLD1 and POLE showed elevated expression in almost all cancers,while POLQ exhibited high expression levels in all cancer types.Some POLYs showed heightened expression in specific cancer subtypes,while others exhibited low expression.Kaplan-Meier survival curves demonstrated significant prognostic value of POLYs in multiple cancers,including PAAD,KIRC,and ACC.Cox analysis further validated these findings.Alteration patterns of POLYs varied significantly among different cancer types and were associated with poorer survival outcomes.Significant correlations were observed between the expression of POLY members and immune cells,DDR pathways,and ubiquitination.Drug sensitivity analysis indicated an inverse relationship between POLY expression and drug response.Conclusion:Our comprehensive study highlights the significant role of POLYs in cancer development and identifies them as promising prognostic and immunological biomarkers for various cancer types.Additionally,targeting POLYs therapeutically holds promise for tumor immunotherapy.展开更多
BACKGROUND Breast cancer(BC),a leading malignant disease,affects women all over the world.Cancer associated fibroblasts(CAFs)stimulate epithelial-mesenchymal transition,and induce chemoresistance and immunosuppression...BACKGROUND Breast cancer(BC),a leading malignant disease,affects women all over the world.Cancer associated fibroblasts(CAFs)stimulate epithelial-mesenchymal transition,and induce chemoresistance and immunosuppression.AIM To establish a CAFs-associated prognostic signature to improve BC patient out-come estimation.METHODS We retrieved the transcript profile and clinical data of 1072 BC samples from The Cancer Genome Atlas(TCGA)databases,and 3661 BC samples from the The Gene Expression Omnibus.CAFs and immune cell infiltrations were quantified using CIBERSORT algorithm.CAF-associated gene identification was done by weighted gene co-expression network analysis.A CAF risk signature was established via univariate,least absolute shrinkage and selection operator regression,and mul-tivariate Cox regression analyses.The receiver operating characteristic(ROC)and Kaplan-Meier curves were employed to evaluate the predictability of the model.Subsequently,a nomogram was developed with the risk score and patient clinical signature.Using Spearman's correlations analysis,the relationship between CAF risk score and gene set enrichment scores were examined.Patient samples were collected to validate gene expression by quantitative real-time polymerase chain reaction(qRT-PCR).RESULTS Employing an 8-gene(IL18,MYD88,GLIPR1,TNN,BHLHE41,DNAJB5,FKBP14,and XG)signature,we attemp-ted to estimate BC patient prognosis.Based on our analysis,high-risk patients exhibited worse outcomes than low-risk patients.Multivariate analysis revealed the risk score as an independent indicator of BC patient prognosis.ROC analysis exhibited satisfactory nomogram predictability.The area under the curve showed 0.805 at 3 years,and 0.801 at 5 years in the TCGA cohort.We also demonstrated that a reduced CAF risk score was strongly associated with enhanced chemotherapeutic outcomes.CAF risk score was significantly correlated with most hallmark gene sets.Finally,the prognostic signature were further validated by qRT-PCR.CONCLUSION We introduced a newly-discovered CAFs-associated gene signature,which can be employed to estimate BC patient outcomes conveniently and accurately.展开更多
目的通过生物信息学的方法探讨视黄醇结合蛋白7(retinol binding protein 7,RBP7)在乳腺癌中的作用。方法使用R语言基于癌症基因组图谱(the cancer genome atlas,TCGA)数据库和人类蛋白质图谱(the human protein atlas,HPA)数据库探索基...目的通过生物信息学的方法探讨视黄醇结合蛋白7(retinol binding protein 7,RBP7)在乳腺癌中的作用。方法使用R语言基于癌症基因组图谱(the cancer genome atlas,TCGA)数据库和人类蛋白质图谱(the human protein atlas,HPA)数据库探索基因RBP7在乳腺癌组织中的差异表达。通过Kaplan-Meier生存分析和受试者工作特征(receiver operating characteristic,ROC)曲线,评估RBP7与乳腺癌临床数据的关系。基于TCGA数据库分析RBP7高低表达分组与不同肿瘤浸润免疫细胞(tumor-infiltrating immune cells,TIICs)的相关性。基因组富集分析(gene set enrichment analysis,GSEA)评估RBP7在与表型相关度排序的基因表中的分布趋势。结果与癌旁组织相比,乳腺癌中RBP7 mRNA表达水平下调,该分子表达在细胞核中。ROC曲线分析显示RBP7诊断乳腺癌的曲线下面积(area under curve,AUC)是0.943(95%CI:0.926~0.960),RBP7的最佳截断值是6.29,敏感度和特异度分别为82.32%,93.69%。Kaplan-Meier生存分析显示RBP7低表达与乳腺癌患者的总生存率相关(HR=0.68,95%CI:0.49~0.93,P=0.017),RBP7是乳腺癌发生的独立危险因素。Spearman相关性揭示RBP7与乳腺癌中pDC细胞和NK细胞呈正相关(r=0.290,0.253,均P<0.05),与Th2细胞呈负相关(r=-0.217,P<0.05)。GSEA表明RBP7富集在脂肪生成、核糖体、肽配体结合受体、钙信号途径等通路中(均P<0.001)。结论RBP7影响乳腺癌的发生发展,可能成为乳腺癌潜在生物标志物和治疗靶点。展开更多
目的基于GDC TCGA Breast Cancer(BRCA)的数据,评估TRIM45(Tripartite Motif Family 45)在乳腺癌中的表达、预后价值及其与临床病理的相关性,揭示TRIM45在乳腺癌中的生物学功能及可能的作用机制。方法采用R软件对GDC TCGA Breast Cancer...目的基于GDC TCGA Breast Cancer(BRCA)的数据,评估TRIM45(Tripartite Motif Family 45)在乳腺癌中的表达、预后价值及其与临床病理的相关性,揭示TRIM45在乳腺癌中的生物学功能及可能的作用机制。方法采用R软件对GDC TCGA Breast Cancer(BRCA)数据进行生信分析,研究TRIM45在乳腺癌中的表达及其与临床病理的关系。采用Kaplan-Meier法评估TRIM45对乳腺癌预后的影响。应用KEGG基因集进行GSEA(Gene Set Enrichment Analysis)基因富集分析,采用Spearman相关性分析筛选TRIM45相关作用基因。结果TRIM45在乳腺癌临床样本中的表达高于癌旁组织(P<0.001);Kaplan-Meier生存分析显示TRIM45高表达患者的总生存期高于TRIM45低表达者(P<0.05);TRIM45在乳腺癌中的表达与T分期、TNM分期、分子分型及病理类型相关联(P<0.05);GSEA富集分析结果显示TRIM45在KEGG_PATHWAYS_IN_CANCER信号通路中发挥重要的生物学作用,Spearman相关性分析筛选出TRIM45与STK36、IKBKB、GLI3具有正相关关系(P<0.001),与HIF1A具有负相关关系(P<0.001)。结论TRIM45在乳腺癌中的表达与T分期、TNM分期、分子分型及病理类型相关联;TRIM45可能通过调控STK36、IKBKB、GLI3和HIF1A在乳腺癌发生发展中发挥重要作用。展开更多
目的基于癌症基因组图谱(TCGA)数据库,观察钠激活钾通道蛋白基因KCNT(potassium sodium-activated channel subfamily T member 2,KCNT2)在肺腺癌癌组织中的表达及临床意义。方法从TCGA数据库中下载肺腺癌组织的RNASeq数据以及临床数据...目的基于癌症基因组图谱(TCGA)数据库,观察钠激活钾通道蛋白基因KCNT(potassium sodium-activated channel subfamily T member 2,KCNT2)在肺腺癌癌组织中的表达及临床意义。方法从TCGA数据库中下载肺腺癌组织的RNASeq数据以及临床数据,分析KCNT2 mRNA在肺腺癌组织和正常组织中的表达差异;以KCNT2表达水平的中位值(0.143)为界限将肺腺癌患者分为KCNT2高表达组和KCNT2低表达组,应用单因素及多因素COX回归分析癌组织中KCNT2表达与患者临床病理特征的关系及预后的相关性。应用基因集富集分析(GSEA)软件分析预测KCNT2在肺腺癌中可能的调控信号通路。结果肺腺癌组KCNT2表达水平低于正常对照组(P<0.05);肺腺癌组织中KCNT2的表达水平与患者Stage分期相关(P<0.05);Stage分期(HR=1.947,95%CI:1.236~3.066,P=0.004)可以作为肺腺癌的独立预后因素;KCNT2低表达组生存率低于KCNT2高表达组(P=0.035);KCNT2主要参与氧化磷酸化信号通路、核糖体、嘧啶代谢、精氨酸和脯氨酸代谢、谷胱甘肽代谢、RNA聚合酶等信号通路。结论KCNT2在肺腺癌组织中呈低表达,与肺腺癌患者的预后相关,并通过参与多种信号通路促进肺腺癌的发生发展,可能是肺腺癌诊断和治疗的潜在生物标志物。展开更多
目的通过分析癌症基因组图谱(the cancer genome atlas,TCGA)数据库构建三阴性乳腺癌(triple negative breast cancer,TNBC)预后相关的竞争性内源性核糖核酸(competitive endogenous RNA,ceRNA)调控网络。方法从TCGA数据库中下载TNBC ln...目的通过分析癌症基因组图谱(the cancer genome atlas,TCGA)数据库构建三阴性乳腺癌(triple negative breast cancer,TNBC)预后相关的竞争性内源性核糖核酸(competitive endogenous RNA,ceRNA)调控网络。方法从TCGA数据库中下载TNBC lncRNA表达RNAseq数据,对TNBC患者的mRNA,miRNA和lncRNA进行差异表达分析,并进一步行生存分析,得到与乳腺癌有明显差异表达同时也对生存有相关性的mRNA,miRNA和lncRNA。同时构建lncRNA-miRNA-mRNA相关ceRNA调控网,再对生存相关lncRNA所相关的mRNA进一步功能富集和注释,并构建蛋白质互作网络最终用关键基因通过人类蛋白质图谱(the human protein atlas,HPA)数据库进行验证。结果在TCGA中共找到TNBC差异表达mRNA 2331个、差异miRNA 100个和差异lncRNA 1269个。ceRNA调控网中的mRNA在细胞黏附、唾液分泌和血小板活化、用于IgA产生的肠道免疫网络、补体和凝血级联反应等信号通路中明显富集。生存分析中,1个差异mRNA(NMUR1),1个差异表达miRNA(hsa-miR-6832-3p),2个差异表达的lncRNA(AC104809,LINC01297)的表达量均与TNBC患者的预后相关,差异具有统计学意义(P<0.05)。最后利用HPA数据库对NMUR1蛋白水平和生存分析验证,NMUR1的高表达患者的总生存期显著高于NMUR1低表达组,差异有统计学意义(P<0.05)。结论成功构建了促进TNBC发生发展的lncRNA-miRNA-mRNA调控网络,筛选得到生存相关的差异mRNA,miRNA和lncRNA为TNBC发病机制的研究和诊疗生物标志物的探索提供参考依据。展开更多
目的:探究生物钟相关基因在原发性肝细胞癌(简称肝癌)中的表达及意义。方法:从美国癌症和肿瘤基因图谱数据库(The Cancer Genome Atlas,TCGA)中下载肝癌数据424例,包括374例肝癌患者样本及50例正常对照样本。运用DECenter软件对51个生...目的:探究生物钟相关基因在原发性肝细胞癌(简称肝癌)中的表达及意义。方法:从美国癌症和肿瘤基因图谱数据库(The Cancer Genome Atlas,TCGA)中下载肝癌数据424例,包括374例肝癌患者样本及50例正常对照样本。运用DECenter软件对51个生物钟相关基因进行差异表达分析,比较生物钟基因在肝癌患者及正常样本之间的表达情况。运用DAVID在线工具分析差异基因的GO及KEGG功能富集通路,并通过STRING数据库构建差异基因之间蛋白质相互作用网络。了解生物钟基因肝癌发生发展过程中的主要作用。结果:在374例肝癌患者样本的51个生物钟相关基因中,有21个基因在肝癌样本中表达上调(P<0.05),3个基因表达下调(P<0.05)。生物钟基因高表达样本主要富集于Wnt信号通路、Hedgehog信号通路及Hippo信号通路(P<0.001)。参与调节昼夜节律和细胞代谢的10个生物钟基因在蛋白质相互作用网络中相关性最为紧密(P<0.001)。GO分析差异基因集中作用于调节昼夜节律、细胞代谢过程、基因表达等通路(P<0.001)。结论:生物钟相关基因通过调节人体昼夜节律和细胞代谢参与原发性肝细胞癌的发生发展。展开更多
BACKGROUND Breast cancer is regarded as a highly malignant neoplasm in the female population,posing a significant risk to women’s overall well-being.The prevalence of breast cancer has been observed to rise in China,...BACKGROUND Breast cancer is regarded as a highly malignant neoplasm in the female population,posing a significant risk to women’s overall well-being.The prevalence of breast cancer has been observed to rise in China,accompanied by an earlier age of onset when compared to Western countries.Breast cancer continues to be a prominent contributor to cancer-related mortality and morbidity among women,primarily due to its limited responsiveness to conventional treatment modalities.The diagnostic process is challenging due to the presence of non-specific clinical manifestations and the suboptimal precision of conventional diagnostic tests.There is a prevailing uncertainty regarding the most effective screening method and target populations,as well as the specificities and execution of screening programs.AIM To identify diagnostic and prognostic biomarkers for breast cancer.METHODS Overlapping differentially expressed genes were screened based on Gene Expression Omnibus(GSE36765,GSE10810,and GSE20086)and The Cancer Genome Atlas datasets.A protein-protein interaction network was applied to excavate the hub genes among these differentially expressed genes.Gene Ontology and Kyoto Encyclopedia of Genes and Genomes pathway analyses,as well as gene set enrichment analyses,were conducted to examine the functions of these genes and their potential mechanisms in the development of breast cancer.For clarification of the diagnostic and prognostic roles of these genes,Kaplan–Mei-er and Cox proportional hazards analyses were conducted.RESULTS This study demonstrated that calreticulin,heat shock protein family B member 1,insulin-like growth Factor 1,interleukin-1 receptor 1,Krüppel-like factor 4,suppressor of cytokine signaling 3,and triosephosphate isomerase 1 are potential diagnostic biomarkers of breast cancer as well as potential treatment targets with clinical implications.CONCLUSION The screening of biomarkers is of guiding significance for the diagnosis and prognosis of the diseases.展开更多
基金National Natural Science Foundation of China,No.81902385The Project of Suzhou People's Livelihood Science and Technology,No.SYS2018037 and No.SYS201739+3 种基金The Six Talent Peaks Project in Jiangsu Province,No.WSW-059Postgraduate Research&Practice Innovation Program of Jiangsu Province,No.SJCX20_1073Medical Research Programs of Health Commission Foundation of Jiangsu Province,No.H2019071The Project of Medical Research of Jiangsu Province,No.Y2018094 and No.H2018056.
文摘BACKGROUND MUC16,encoding cancer antigen 125,is a frequently mutated gene in gastric cancer.In addition,MUC16 mutations seem to result in a better prognosis in gastric cancer.However,the mechanisms that lead to a better prognosis by MUC16 mutations have not yet been clarified.AIM To delve deeper into the underlying mechanisms that explain why MUC16 mutations signal a better prognosis in gastric cancer.METHODS We used multi-omics data,including mRNA,simple nucleotide variation,copy number variation and methylation data from The Cancer Genome Atlas,to explore the relationship between MUC16 mutations and prognosis.Cox regression and random survival forest algorithms were applied to search for hub genes.Gene set enrichment analysis was used to elucidate the molecular mechanisms.Single-sample gene set enrichment analysis and“EpiDISH”were used to assess immune cells infiltration,and“ESTIMATE”for analysis of the tumor microenvironment.RESULTS Our study found that compared to the wild-type group,the mutation group had a better prognosis.Additional analysis indicated that the MUC16 mutations appear to activate the DNA repair and p53 pathways to act as an anti-tumor agent.We also identified a key gene,NPY1R(neuropeptide Y receptor Y1),which was significantly more highly expressed in the MUC16 mutations group than in the MUC16 wild-type group.The high expression of NPY1R predicted a poorer prognosis,which was also confirmed in a separate Gene Expression Omnibus cohort.Further susceptibility analysis revealed that NPY1R might be a potential drug target for gastric cancer.Furthermore,in the analysis of the tumor microenvironment,we found that immune cells in the mutation group exhibited higher anti-tumor effects.In addition,the tumor mutation burden and cancer stem cells index were also higher in the mutation group than in the wild-type group.CONCLUSION We speculated that the MUC16 mutations might activate the p53 pathway and DNA repair pathway:alternatively,the tumor microenvironment may be involved.
文摘目的通过数据挖掘分析SmuG1在卵巢癌组织中的表达及预后意义。方法 THPA数据库初步探讨SmuG1在人体的分布以及表达, TCGA数据库分析卵巢癌患者SmuG1 mRNA的表达水平与临床病理特征的相关性,通过生存分析探讨SmuG1 mRNA水平与总体生存期的关系,利用Cox比例风险回归模型分析SmuG1是否为患者总体生存期的独立预后影响因子。结果 THPA数据库发现SmuG1是一种细胞内糖基化酶,在全身各类组织及器官中均有表达,TCGA数据库分析发现SmuG1 mRNA水平与卵巢癌的临床分期呈负相关( P =0.024,相关系数 r =-0.5),而与年龄、肿瘤级别、残留肿瘤大小、耐药性等无关( P >0.05)。生存分析发现SmuG1 mRNA水平高的患者比SmuG1 mRNA水平低的患者存活时间更长差异无统计学意义( P =0.035)。Cox比例风险回归模型分析表明SmuG1的表达水平是卵巢癌患者的显著独立预后指标( HR =0.98,95% CI :0.618 97~1.560 583;P =0.009)。结论人卵巢癌组织中SmuG1水平与临床分期呈负相关。SmuG1表达水平高的卵巢癌患者的总体生存期较长,提示SmuG1可能是卵巢癌显著的独立预后指标。
文摘目的基于癌症基因组图谱(the cancer genome atlas,TCGA)数据库构建肝细胞癌(hepatocellular carcinoma,HCC)双硫死亡相关基因(disulfidptosis-related genes,DRGs)预后风险模型及评价。方法通过生物信息学方法分析TCGA数据库中371例HCC样本及50例癌旁样本中15个DRGs的表达情况,并进行基因本体(gene ontology,GO)功能注释和京都基因和基因组百科全书(Kyoto encyclopedia of genes and genomes,KEGG)富集分析、Kaplan-Meier(KM)生存分析;通过单因素COX回归分析筛选出有统计学意义的DRGs,通过LASSO回归分析及多因素COX回归分析筛选出关键DRGs构建预后风险模型,并根据风险评分将HCC患者分为高风险组和低风险组,制作KM生存曲线和时间依赖的受试者工作特征(receiver operator characteristic,ROC)曲线进行验证评价。结果与癌旁样本相比,HCC样本15个DRGs中FLNA,MYH9,TLN1,ACTB,MYL6,CAPZB,DSTN,ACTN4,SLC7A11,INF2,CD2AP,PDLIM1和FLNB均表达上调,且差异具有统计学意义(t=1793~6310,均P<0.001);经GO功能注释和KEGG富集分析显示,DRGs主要与肌动蛋白细胞骨架和细胞黏附相关的生物过程或途径密切相关。经KM生存分析结果显示,SLC7A11,INF2,CD2AP,MYL6,ACTB高表达组生存率低于低表达组[HR=1.46(1.03~2.07)~1.93(1.36~2.75),均P<0.05]。通过单因素COX回归分析、LASSO分析及多因素COX回归分析构建预后风险模型riskscore=(0.247×SLC7A11)+(0.289×INF2)+(0.076×CD2AP)+(0.06×MYL6);计算样本的风险评分,风险评分越高,预后不良的HCC患者人数越多;KM生存分析显示高风险组的总生存率比低风险组低;1,3,5年的AUC值分别为0.709,0.661和0.648;通过多因素COX回归分析表明SLC7A11[HR=1.832(1.274~2.636),P=0.001]是独立的预后危险因素。结论四个DRGs构建的预后风险模型在预测HCC患者预后情况有一定的作用。
基金supported by the project of funds by the Consultation of Provincial Department and University for S&T Innovation granted by Hebei Provincial Department of Science and Technology and Hebei Medical University(2020TXZH04).
文摘Introduction:DNA polymerases are crucial for maintaining genome stability and influencing tumorigenesis.However,the clinical implications of DNA polymerases in tumorigenesis and their potential as anti-cancer therapy targets are not well understood.Methods:We conducted a systematic analysis using TCGA Pan-Cancer Atlas data and Gene Set Cancer Analysis results to examine the expression profiles of 15 DNA polymerases(POLYs)and their clinical correlations.We also evaluated the prognostic value of POLYs by analyzing their expression levels in relation to overall survival time(OS)using Kaplan-Meier survival curves.Additionally,we investigated the correlations between POLY expression and immune cells,DNA damage repair(DDR)pathways,and ubiquitination.Drug sensitivity analysis was performed to assess the relationship between POLY expression and drug response.Results:Our analysis revealed that 14 out of 15 POLYs exhibited significantly distinct expression patterns between tumor and normal samples across most cancer types,except for DNA nucleotidylexotransferase(DNTT).Specifically,POLD1 and POLE showed elevated expression in almost all cancers,while POLQ exhibited high expression levels in all cancer types.Some POLYs showed heightened expression in specific cancer subtypes,while others exhibited low expression.Kaplan-Meier survival curves demonstrated significant prognostic value of POLYs in multiple cancers,including PAAD,KIRC,and ACC.Cox analysis further validated these findings.Alteration patterns of POLYs varied significantly among different cancer types and were associated with poorer survival outcomes.Significant correlations were observed between the expression of POLY members and immune cells,DDR pathways,and ubiquitination.Drug sensitivity analysis indicated an inverse relationship between POLY expression and drug response.Conclusion:Our comprehensive study highlights the significant role of POLYs in cancer development and identifies them as promising prognostic and immunological biomarkers for various cancer types.Additionally,targeting POLYs therapeutically holds promise for tumor immunotherapy.
文摘BACKGROUND Breast cancer(BC),a leading malignant disease,affects women all over the world.Cancer associated fibroblasts(CAFs)stimulate epithelial-mesenchymal transition,and induce chemoresistance and immunosuppression.AIM To establish a CAFs-associated prognostic signature to improve BC patient out-come estimation.METHODS We retrieved the transcript profile and clinical data of 1072 BC samples from The Cancer Genome Atlas(TCGA)databases,and 3661 BC samples from the The Gene Expression Omnibus.CAFs and immune cell infiltrations were quantified using CIBERSORT algorithm.CAF-associated gene identification was done by weighted gene co-expression network analysis.A CAF risk signature was established via univariate,least absolute shrinkage and selection operator regression,and mul-tivariate Cox regression analyses.The receiver operating characteristic(ROC)and Kaplan-Meier curves were employed to evaluate the predictability of the model.Subsequently,a nomogram was developed with the risk score and patient clinical signature.Using Spearman's correlations analysis,the relationship between CAF risk score and gene set enrichment scores were examined.Patient samples were collected to validate gene expression by quantitative real-time polymerase chain reaction(qRT-PCR).RESULTS Employing an 8-gene(IL18,MYD88,GLIPR1,TNN,BHLHE41,DNAJB5,FKBP14,and XG)signature,we attemp-ted to estimate BC patient prognosis.Based on our analysis,high-risk patients exhibited worse outcomes than low-risk patients.Multivariate analysis revealed the risk score as an independent indicator of BC patient prognosis.ROC analysis exhibited satisfactory nomogram predictability.The area under the curve showed 0.805 at 3 years,and 0.801 at 5 years in the TCGA cohort.We also demonstrated that a reduced CAF risk score was strongly associated with enhanced chemotherapeutic outcomes.CAF risk score was significantly correlated with most hallmark gene sets.Finally,the prognostic signature were further validated by qRT-PCR.CONCLUSION We introduced a newly-discovered CAFs-associated gene signature,which can be employed to estimate BC patient outcomes conveniently and accurately.
文摘目的通过生物信息学的方法探讨视黄醇结合蛋白7(retinol binding protein 7,RBP7)在乳腺癌中的作用。方法使用R语言基于癌症基因组图谱(the cancer genome atlas,TCGA)数据库和人类蛋白质图谱(the human protein atlas,HPA)数据库探索基因RBP7在乳腺癌组织中的差异表达。通过Kaplan-Meier生存分析和受试者工作特征(receiver operating characteristic,ROC)曲线,评估RBP7与乳腺癌临床数据的关系。基于TCGA数据库分析RBP7高低表达分组与不同肿瘤浸润免疫细胞(tumor-infiltrating immune cells,TIICs)的相关性。基因组富集分析(gene set enrichment analysis,GSEA)评估RBP7在与表型相关度排序的基因表中的分布趋势。结果与癌旁组织相比,乳腺癌中RBP7 mRNA表达水平下调,该分子表达在细胞核中。ROC曲线分析显示RBP7诊断乳腺癌的曲线下面积(area under curve,AUC)是0.943(95%CI:0.926~0.960),RBP7的最佳截断值是6.29,敏感度和特异度分别为82.32%,93.69%。Kaplan-Meier生存分析显示RBP7低表达与乳腺癌患者的总生存率相关(HR=0.68,95%CI:0.49~0.93,P=0.017),RBP7是乳腺癌发生的独立危险因素。Spearman相关性揭示RBP7与乳腺癌中pDC细胞和NK细胞呈正相关(r=0.290,0.253,均P<0.05),与Th2细胞呈负相关(r=-0.217,P<0.05)。GSEA表明RBP7富集在脂肪生成、核糖体、肽配体结合受体、钙信号途径等通路中(均P<0.001)。结论RBP7影响乳腺癌的发生发展,可能成为乳腺癌潜在生物标志物和治疗靶点。
文摘目的基于GDC TCGA Breast Cancer(BRCA)的数据,评估TRIM45(Tripartite Motif Family 45)在乳腺癌中的表达、预后价值及其与临床病理的相关性,揭示TRIM45在乳腺癌中的生物学功能及可能的作用机制。方法采用R软件对GDC TCGA Breast Cancer(BRCA)数据进行生信分析,研究TRIM45在乳腺癌中的表达及其与临床病理的关系。采用Kaplan-Meier法评估TRIM45对乳腺癌预后的影响。应用KEGG基因集进行GSEA(Gene Set Enrichment Analysis)基因富集分析,采用Spearman相关性分析筛选TRIM45相关作用基因。结果TRIM45在乳腺癌临床样本中的表达高于癌旁组织(P<0.001);Kaplan-Meier生存分析显示TRIM45高表达患者的总生存期高于TRIM45低表达者(P<0.05);TRIM45在乳腺癌中的表达与T分期、TNM分期、分子分型及病理类型相关联(P<0.05);GSEA富集分析结果显示TRIM45在KEGG_PATHWAYS_IN_CANCER信号通路中发挥重要的生物学作用,Spearman相关性分析筛选出TRIM45与STK36、IKBKB、GLI3具有正相关关系(P<0.001),与HIF1A具有负相关关系(P<0.001)。结论TRIM45在乳腺癌中的表达与T分期、TNM分期、分子分型及病理类型相关联;TRIM45可能通过调控STK36、IKBKB、GLI3和HIF1A在乳腺癌发生发展中发挥重要作用。
文摘目的基于癌症基因组图谱(TCGA)数据库,观察钠激活钾通道蛋白基因KCNT(potassium sodium-activated channel subfamily T member 2,KCNT2)在肺腺癌癌组织中的表达及临床意义。方法从TCGA数据库中下载肺腺癌组织的RNASeq数据以及临床数据,分析KCNT2 mRNA在肺腺癌组织和正常组织中的表达差异;以KCNT2表达水平的中位值(0.143)为界限将肺腺癌患者分为KCNT2高表达组和KCNT2低表达组,应用单因素及多因素COX回归分析癌组织中KCNT2表达与患者临床病理特征的关系及预后的相关性。应用基因集富集分析(GSEA)软件分析预测KCNT2在肺腺癌中可能的调控信号通路。结果肺腺癌组KCNT2表达水平低于正常对照组(P<0.05);肺腺癌组织中KCNT2的表达水平与患者Stage分期相关(P<0.05);Stage分期(HR=1.947,95%CI:1.236~3.066,P=0.004)可以作为肺腺癌的独立预后因素;KCNT2低表达组生存率低于KCNT2高表达组(P=0.035);KCNT2主要参与氧化磷酸化信号通路、核糖体、嘧啶代谢、精氨酸和脯氨酸代谢、谷胱甘肽代谢、RNA聚合酶等信号通路。结论KCNT2在肺腺癌组织中呈低表达,与肺腺癌患者的预后相关,并通过参与多种信号通路促进肺腺癌的发生发展,可能是肺腺癌诊断和治疗的潜在生物标志物。
文摘目的通过分析癌症基因组图谱(the cancer genome atlas,TCGA)数据库构建三阴性乳腺癌(triple negative breast cancer,TNBC)预后相关的竞争性内源性核糖核酸(competitive endogenous RNA,ceRNA)调控网络。方法从TCGA数据库中下载TNBC lncRNA表达RNAseq数据,对TNBC患者的mRNA,miRNA和lncRNA进行差异表达分析,并进一步行生存分析,得到与乳腺癌有明显差异表达同时也对生存有相关性的mRNA,miRNA和lncRNA。同时构建lncRNA-miRNA-mRNA相关ceRNA调控网,再对生存相关lncRNA所相关的mRNA进一步功能富集和注释,并构建蛋白质互作网络最终用关键基因通过人类蛋白质图谱(the human protein atlas,HPA)数据库进行验证。结果在TCGA中共找到TNBC差异表达mRNA 2331个、差异miRNA 100个和差异lncRNA 1269个。ceRNA调控网中的mRNA在细胞黏附、唾液分泌和血小板活化、用于IgA产生的肠道免疫网络、补体和凝血级联反应等信号通路中明显富集。生存分析中,1个差异mRNA(NMUR1),1个差异表达miRNA(hsa-miR-6832-3p),2个差异表达的lncRNA(AC104809,LINC01297)的表达量均与TNBC患者的预后相关,差异具有统计学意义(P<0.05)。最后利用HPA数据库对NMUR1蛋白水平和生存分析验证,NMUR1的高表达患者的总生存期显著高于NMUR1低表达组,差异有统计学意义(P<0.05)。结论成功构建了促进TNBC发生发展的lncRNA-miRNA-mRNA调控网络,筛选得到生存相关的差异mRNA,miRNA和lncRNA为TNBC发病机制的研究和诊疗生物标志物的探索提供参考依据。
文摘目的:探究生物钟相关基因在原发性肝细胞癌(简称肝癌)中的表达及意义。方法:从美国癌症和肿瘤基因图谱数据库(The Cancer Genome Atlas,TCGA)中下载肝癌数据424例,包括374例肝癌患者样本及50例正常对照样本。运用DECenter软件对51个生物钟相关基因进行差异表达分析,比较生物钟基因在肝癌患者及正常样本之间的表达情况。运用DAVID在线工具分析差异基因的GO及KEGG功能富集通路,并通过STRING数据库构建差异基因之间蛋白质相互作用网络。了解生物钟基因肝癌发生发展过程中的主要作用。结果:在374例肝癌患者样本的51个生物钟相关基因中,有21个基因在肝癌样本中表达上调(P<0.05),3个基因表达下调(P<0.05)。生物钟基因高表达样本主要富集于Wnt信号通路、Hedgehog信号通路及Hippo信号通路(P<0.001)。参与调节昼夜节律和细胞代谢的10个生物钟基因在蛋白质相互作用网络中相关性最为紧密(P<0.001)。GO分析差异基因集中作用于调节昼夜节律、细胞代谢过程、基因表达等通路(P<0.001)。结论:生物钟相关基因通过调节人体昼夜节律和细胞代谢参与原发性肝细胞癌的发生发展。
基金Supported by the Natural Science Foundation of Inner Mongolia,No.2021GG0298.
文摘BACKGROUND Breast cancer is regarded as a highly malignant neoplasm in the female population,posing a significant risk to women’s overall well-being.The prevalence of breast cancer has been observed to rise in China,accompanied by an earlier age of onset when compared to Western countries.Breast cancer continues to be a prominent contributor to cancer-related mortality and morbidity among women,primarily due to its limited responsiveness to conventional treatment modalities.The diagnostic process is challenging due to the presence of non-specific clinical manifestations and the suboptimal precision of conventional diagnostic tests.There is a prevailing uncertainty regarding the most effective screening method and target populations,as well as the specificities and execution of screening programs.AIM To identify diagnostic and prognostic biomarkers for breast cancer.METHODS Overlapping differentially expressed genes were screened based on Gene Expression Omnibus(GSE36765,GSE10810,and GSE20086)and The Cancer Genome Atlas datasets.A protein-protein interaction network was applied to excavate the hub genes among these differentially expressed genes.Gene Ontology and Kyoto Encyclopedia of Genes and Genomes pathway analyses,as well as gene set enrichment analyses,were conducted to examine the functions of these genes and their potential mechanisms in the development of breast cancer.For clarification of the diagnostic and prognostic roles of these genes,Kaplan–Mei-er and Cox proportional hazards analyses were conducted.RESULTS This study demonstrated that calreticulin,heat shock protein family B member 1,insulin-like growth Factor 1,interleukin-1 receptor 1,Krüppel-like factor 4,suppressor of cytokine signaling 3,and triosephosphate isomerase 1 are potential diagnostic biomarkers of breast cancer as well as potential treatment targets with clinical implications.CONCLUSION The screening of biomarkers is of guiding significance for the diagnosis and prognosis of the diseases.