吉林大学学报(医学版) ›› 2026, Vol. 52 ›› Issue (5): 1408-1419.doi: 10.13481/j.1671-587X.20260521

• 临床研究 • 上一篇    

基于复发性胶质母细胞瘤转录组差异的CGGA数据库生物信息学分析及其实验验证

张莹莹1,汪雪2,徐宁波3,吴自勍1()   

  1. 1.南方医科大学中西医结合医院病理科,广东 广州 510315
    2.四川省绵阳市富临医院肿瘤科,四川 绵阳 621000
    3.南方医科大学珠江医院介入科,广东 广州 510315
  • 收稿日期:2025-11-10 接受日期:2026-01-18 出版日期:2026-09-28 发布日期:2026-10-15
  • 通讯作者: 吴自勍 E-mail:hailian@fimmu.com
  • 作者简介:张莹莹(1999-),女,安徽省阜阳市人,在读硕士研究生,主要从事肿瘤发生发展分子机制方面的研究。
  • 基金资助:
    国家自然科学基金青年科学基金项目(82003179);广东省广州市科技局科技计划项目(2023A04J0422)

Bioinformatics analysis of CGGA database based on transcriptome difference in recurrent glioblastoma and its experimental validation

Yingying ZHANG1,Xue WANG2,Ningbo XU3,Ziqing WU1()   

  1. 1.Department of Pathology,Integrated Hospital of Traditional Chinese and Western Medicine,Southern Medical University,Guangzhou 510315,China
    2.Department of Oncology,Fulin Hospital,Mianyang City,Sichuan Province,Mianyang 621000,China
    3.Department of Intervention,Pearl River Hospital,Southern Medical University,Guangzhou 510315,China
  • Received:2025-11-10 Accepted:2026-01-18 Online:2026-09-28 Published:2026-10-15
  • Contact: Ziqing WU E-mail:hailian@fimmu.com

摘要:

目的 采用中国胶质瘤基因组图谱(CGGA)数据库建立复发性胶质母细胞瘤(GBM)患者差异表达基因(DEGs)和差异表达长链非编码RNAs(DELs)的预后模型,分析DEGs和DELs与患者预后之间的关系,并通过实验进行验证。 方法 从CGGA数据库中下载GBM患者转录组数据和相应的临床数据,包括203例原发GBM患者(原发GBM组)和103例复发GBM患者(复发GBM组)。采用Perl语言编写的合并脚本将每个样本的表达信息合并成矩阵,Ensembl数据库对该表达矩阵进行注释,R语言edgeR和DESeq2软件包筛除低表达转录本并完成数据提取及标准化。比较原发GBM组与复发GBM组患者之间的转录本表达差异,计算差异倍数(FC),以|log10FC|>0.5且P<0.05为标准筛选DEGs和DELs。采用单因素Cox比例风险回归模型分析DEGs和DELs与GBM患者预后的关系,选择与患者预后相关的DEGs和DELs,构建多因素Cox比例风险回归模型,计算患者风险评分。基于风险评分中位数将患者分为低风险组和高风险组,采用Kaplan-Meier生存分析和受试者工作特征(ROC)曲线评估风险评分的预后预测效能,并分析比较不同临床病理特征患者的风险评分差异。采用Lasso回归分析预后相关DEGs和DELs对患者生存情况的预测效能,构建列线图。选取6例原发GBM患者和6例复发GBM患者的肿瘤组织样本分别作为原发组及复发组,采用实时荧光定量PCR(RT-qPCR)法和荧光原位杂交(FISH)法检测2组患者肿瘤组织中RP11-283I3.2表达水平及阳性细胞数。 结果 原发GBM组与复发GBM组患者转录组数据比较,共筛选出151个DEGs和DELs,其中12个下调,139个上调。单因素Cox回归分析鉴定出4个与GBM患者预后相关的DEGs,分别为CHRNA1、HIST1H4I、SLC18A3和TMEM61,以及8个与患者预后相关的DELs,分别为AC002454.1、AC006262.6、AC123886.2、CDKN2B-AS1、FAM225B、HAR1A、LBX1-AS1和RP11-283I3.2。Kaplan-Meier生存分析,高风险组GBM患者的OS明显低于低风险组(P<0.001)。时间依赖性ROC曲线,风险评分预测GBM患者1、3和5年生存概率的曲线下面积(AUC)分别为0.675、0.750及0.772。异柠檬酸脱氢酶(IDH)野生型GBM患者风险评分明显高于IDH突变型患者(P<0.001)。Lasso回归分析,RP11-283I3.2在预后相关DEGs和DELs中得分最高;基于表达谱将患者分为Cluster 1组和Cluster 2组,与Cluster 1组比较,Cluster 2组患者OS更低(P<0.01)。RT-qPCR法和FISH法,与原发组比较,复发组患者肿瘤组织中RP11-283I3.2表达水平和阳性细胞数均明显升高(P<0.001)。 结论 本研究共鉴定出12个与GBM患者预后相关的DEGs和DELs,并构建了具有较好预测效能的预后模型。RP11-283I3.2在复发GBM患者组织中呈高表达,提示其可能成为GBM复发的潜在分子标志物。

关键词: 胶质母细胞瘤, 复发, 差异表达基因, 长链非编码RNA, 生物信息学, 生存分析

Abstract:

Objective To establish a prognostic model based on differentially expressed genes (DEGs) and differentially expressed long non-coding RNAs(DELs) of the recurrent glioblastoma (GBM) patients using the Chinese Glioma Genome Atlas (CGGA) database, to discuss the relationships between the DEGs, DELs and clinicopathological features, and to verify the findings through experiments. Methods The transcriptome data and corresponding clinical data of GBM patients, including 203 patients with primary GBM (primary GBM group) and 103 patients with recurrent GBM (recurrent GBM group), were downloaded from the CGGA database. A Perl script was used to merge the expression profiles across all samples into a matrix, which was annotated using the Ensembl database. R packages edgeR and DESeq2 were used to filter out low-expression transcripts and to extract and normalize the data. The expression differences in transcripts between primary GBM group and recurrent GBM group were compared, the fold change(FC) was calculated, and the DEGs and DELs were screened with the criteria of |log10FC|>0.5 and P<0.05. A univariate Cox proportional hazards regression model was used to analyze the relationship between DEGs and DELs and the prognosis of GBM patients. The DEGs and DELs associated with prognosis were selected to construct a multivariate Cox proportional hazards regression model, and the risk scores were calculated for all patients. Based on the median risk score, the patients were divided into low-risk and high-risk groups. The Kaplan-Meier survival analysis and receiver operating characteristic (ROC) curve were used to evaluate the predictive efficacy of the risk score for overall survival (OS)in the patients, and the differences in risk scores in the patients with different clinicopathological features were analyzed and compared. Lasso regression analysis was used to evaluate the predictive efficacies of the prognosis-related DEGs and DELs for patient survival, and a nomogram was constructed. The tumor tissue samples from 6 primary GBM patients and 6 recurrent GBM patients were selected as primary group and recurrent group, respectively. Real-time fluorescence quantitative PCR (RT-qPCR) method and fluorescence in situ hybridization (FISH) method were used to detect the expression levels of RP11-283I3.2 and the numbers of positive cells in tumor tissues of the patients in two groups. Results A total of 151 DEGs and DELs were identified between patients in primary GBM groupand recurrent GBM group,among which 12 were downregulated and 139 were upregulated. Univariate Cox regression analysis identified that 4 DEGs (CHRNA1, HIST1H4I, SLC18A3, and TMEM61) and 8 DELs (AC002454.1, AC006262.6, AC123886.2,CDKN2B-AS1,FAM225B,HAR1A,LBX1-AS1,and RP11-283I3.2) were significantly associated with the prognosis of GBM patients.The Kaplan-Meier survival analysis results showed that the OS of GBM patients in high-risk group was significantly lower than that in low-risk group (P<0.001). The time-dependent ROC curve results showed that the areas under the curve (AUCs) of the risk score for predicting 1-, 3-, and 5-year survival probability were 0.675, 0.750, and 0.772, respectively. The risk score of GBM patients with wild-type isocitrate dehydrogenase (IDH) was significantly higher than that of patients with mutant IDH (P<0.001). The Lasso regression analysis results indicated that RP11-283I3.2 had the highest score among the prognosis-related DEGs and DELs. Based on the expression profile, the patients were divided into Cluster 1 group and Cluster 2 group. Compared with Cluster 1 group, the patients in Cluster 2 group had lower OS (P<0.01). The RT-qPCR method and FISH method results showed that compared with primary group, the expression level of RP11-283I3.2 and the number of positive cells in tumor tissue of the patients in recurrent group were significantly increased (P<0.001). Conclusion A total of 12 DEGs and DELs associated with the prognosis of GBM patients were identified, and a prognostic model with good predictive efficacy was constructed. The high expression of RP11-283I3.2 in tumor tissues in recurrent GBM patients suggests its potential as a molecular biomarker for GBM recurrence.

Key words: Glioblastoma, Recurrence, Differentially expressed genes, Long non-coding RNA, Bioinformatics, Survival analysis

中图分类号: 

  • R739.4