实用肿瘤学杂志 ›› 2022, Vol. 36 ›› Issue (2): 119-126.doi: 10.11904/j.issn.1002-3070.2022.02.004

• 临床研究 • 上一篇    下一篇

基于免疫相关lncRNAs的胃癌早期诊断和预后风险模型的构建和验证

王洪英1, 李岩1, 韩鑫浩1, 魏孝礼2, 贾慧珣3, 袁文娟4, 张秋菊1   

  1. 1.哈尔滨医科大学公共卫生学院卫生统计教研室(哈尔滨 150086);
    2.哈尔滨医科大学附属肿瘤医院消化内科第一病房;
    3.上海交通大学附属第一人民医院;
    4.桦川县悦来镇卫生院
  • 收稿日期:2021-12-21 修回日期:2022-03-11 出版日期:2022-04-28 发布日期:2022-04-28
  • 通讯作者: 张秋菊,E-mail:zhangqj@hrbmu.edu.cn
  • 作者简介:王洪英,女,(1995-),硕士研究生,从事肿瘤多组学的研究。
  • 基金资助:
    国家自然基金面上项目(编号:82073666);国家自然基金青年基金(编号:82003554);北京医学奖励基金会项目(编号:YXJL-2020-0785-0976)

Construction and validation of a risk model for early diagnosis and prognosis of gastric cancer based on immune-related lncRNAs

WANG Hongying1, LI Yan1, HAN Xinhao1, WEI Xiaoli2, JIA Huixun3, YUAN Wenjuan4, ZHANG Qiuju1   

  1. 1. Department of Health Statistics,School of Public Health,Harbin Medical University,Harbin 150086,China;
    2. Ward 1,Department of Gastroenterology,Harbin Medical University Cancer Hospital;
    3. The First People′s Hospital Affiliated to Shanghai Jiao Tong University;
    4. Yuelai Town Health Center,Huachuan County
         
  • Received:2021-12-21 Revised:2022-03-11 Online:2022-04-28 Published:2022-04-28

摘要: 目的 基于胃癌免疫相关lncRNAs,建立早期诊断模型和预后风险模型,为胃癌早期诊断和预后预测提供数据支持。方法 利用TCGA-STAD数据集与immport数据库筛选胃癌相关免疫lncRNAs。将TCGA-STAD作为训练集,利用logistic回归分析构建胃癌早期诊断模型;单因素Cox和LASSO回归分析用于筛选影响患者总生存期的免疫lncRNAs并构建预后基因标签,最后结合基因标签和患者临床指标,构建胃癌预后风险模型。胃癌基因芯片数据集GSE54129和GSE62254分别作为诊断和预后模型的验证集进行外部验证。结果 筛选出9个免疫相关lncRNAs用于构建胃癌早期诊断模型,模型构建和验证的Hosmer-Lemeshow检验P值分别为0.9982和1.0000,ROC曲线下面积分别为0.991和0.958。获得6个影响患者总生存期的免疫lncRNAs用于构建基因标签。根据标签风险得分中位数将患者分为高、低风险组,生存分析表明高风险组患者总生存率低于低风险组患者(训练集及验证集,P<0.05)。生存状态预测基因标签构建构建及验证的C-index分别为0.61和0.59,1、3、5年总生存率ROC曲线下面积分别为0.623、0.623、0.677和0.581、0.613、0.622。多因素Cox回归分析表明基因标签、年龄、肿瘤分期是影响胃癌患者总生存率的独立预后因素,以此构建预后风险模型。C-index、ROC曲线和校准曲线分析表明,预后风险模型的预测效能优于基因标签。结论 早期诊断模型可以有效协助胃癌早期筛查;基因标签是影响胃癌患者总生存率的独立因素,可以中等程度地预测患者的预后,相比而言,预后风险模型可以进一步提高模型的预测能力。
   

关键词: 胃癌, 诊断, 预后, 免疫相关长链非编码RNAs

Abstract: Objective The aim of this study was to establish early diagnosis model and a prognostic risk model on immune-related lncRNAs of gastric cancer based,and to provide data support for early diagnosis and prediction prognosis of gastric cancer.Methods The TCGA-STAD dataset and the immport database were used to screen gastric cancer-related immune lncRNAs.The TCGA-STAD was used as the training set to construct a model for early diagnosis model of gastric cancer by logistic regression analysis.Univariate Cox and LASSO regression analyses were used to screen immune lncRNAs that affected the overall survival of patients and construct prognostic gene signature.Finally,the gene signature and patient clinical indicators were combined to construct a risk model of gastric cancer prognosis.Gastric cancer gene chip datasets GSE54129 and GSE62254 were used as validation sets for external validation of the diagnostic and prognostic models,respectively.Results Nine immune-related lncRNAs were screened out to construct an early diagnostic model of gastric cancer.The Hosmer-Lemeshow test P-values of model construction and validation were 0.9982 and 1.0000,respectively,and the areas under the ROC curve were 0.991 and 0.958,respectively.Six immune lncRNAs affecting the overall survival of patients were obtained to construct the gene signature.Patients were divided into the high and low risk groups according to the median signature risk score.Survival analysis showed that the overall survival rate of patients in the high risk group was lower than that of the patients in the low risk group(training set and validation set,P<0.05).The C-index of the survival status prediction genetic signature construction and validation were 0.61 and 0.59,respectively,and the areas under ROC curves for 1-,3- and 5-year overall survival rates were 0.623,0.623,0.677 and 0.581,0.613,0.622,respectively.Multivariate Cox regression analysis showed that gene signature,age and tumor stage were independent factors affecting the overall survival rate of gastric cancer patients,and a prognostic risk model was constructed.C-index,ROC curve and calibration curve analysis showed that the predictive power of the prognostic risk model was better than that of the gene signature.Conclusion The early diagnostic model can effectively assist the early screening of gastric cancer.The gene signature,an independent factor affecting the overall survival rate of gastric cancer patients, which can predict the prognosis of patients to a moderate degree.In comparison,the prognostic risk model can further improve the predictive ability of the model.
   

Key words: Gastric cancer, Diagnosis, Prognosis, Immune-related long non-coding RNAs

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