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IF=10.6!恭喜南京大学/北京协和医院借TCGA+GEO拿下一区TOP!8个甲基化位点搞定肺腺癌预后!

  • 2026-04-17 06:19:20
IF=10.6!恭喜南京大学/北京协和医院借TCGA+GEO拿下一区TOP!8个甲基化位点搞定肺腺癌预后!

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生信联创

研究亮点(必看!)

1.极简特征:仅8个5mC甲基化探针,模型简洁、不易过拟合、成本极低

2.超强验证6大队列全覆盖(TCGA+国内两大中心+欧洲GEO)。

3.独立预后完全独立于年龄、性别、分期、EGFR、辅助治疗、吸烟状态。

4.性能碾压:对比30个已发表模型,HR与AUC全面更优

5.临床友好:支持BSAS/qMSP低成本检测,适配FFPE样本,极易临床落地

引言

肺癌居全球癌症死亡首位肺腺癌预后差异巨大,根源是分子异质性。现有预后方法不准、不稳、难落地,而5mC稳定、适配FFPE的理想标志物,团队由此构建简洁可临床转化的肺腺癌预后模型。

文献解读

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研究概述

该研究为多中心、大样本表观遗传预后模型研究,基于5mC甲基化筛选标志物,构建8探针MethPro‑LUAD模型,经6个独立队列、超1000例样本验证,可独立、稳定区分肺腺癌高低风险,指导术后个体化管理,用8个甲基化位点实现比传统分期更准、更稳的预后分层

图1为研究流程图

(A)MethPro-LUAD通过检测肺腺癌组织的DNA 甲基化,将患者划分为高 / 低风险,指导个体化治疗、随访与成本控制

(B)研究以TCGA-LUAD269 例为训练集、180 例为测试集,构建8 探针模型,并在协和、鼓楼医院及GEO等多队列完成验证

研究目的

该研究旨在筛选与肺腺癌OS/DFS相关的5mC位点,构建精简稳健的预后评分模型,并在中美欧多中心、多平台队列中外部验证,以证实模型独立于临床病理因素的临床转化价值,最终通过低成本检测方案推动其临床落地。

研究方法

1.研究队列:设训练集(269例)、测试集(180例),联合国内2家医院、2个GEO数据集,共6队列、1069例样本

2.筛选建模:基于450K/850K芯片数据,经Cox回归与U检验筛选,最终构建8探针MethPro-LUAD风险评分模型。

3.评价策略:以训练集中位值统一分界,主要评估OS,次要评估DFS,采用KM、HR、ROC、AUC、RMST验证效能。

4.验证维度:全面验证年龄、性别、分期、EGFR、治疗、吸烟跨平台、跨人种的预后独立性。

研究结果

1.构建用于LUAD预后的八探针甲基化特征

研究纳入TCGA 449例肺腺癌,按3:2分为训练集269例、测试集180例,联合4个外部队列共6大队列,临床病理特征详见表1(图1B)。经筛选得到7797个探针,最终构建8探针MethPro-LUAD模型,建立风险评分公式。8个位点甲基化均与OS显著相关(图2A),PCA证实模型无过拟合、稳定性强。

表1为培训、测试和验证队列的基线特征

图2为TCGA训练队列中的总生存率与甲基化水平,以及MethPro-LUAD在TCGA训练与测试队列中的Kaplan-Meier分析和受试者工作特征分析

(A)TCGA 训练队8 个探针甲基化水平在 5 年事件组与长期生存组差异显著(Mann‑Whitney U 检验)

(B/C)TCGA 训练、测试集KM 生存曲线均显示:低风险组生存显著优于高风险组(HR、95% CI)

2.MethPro-LUAD能稳健预测TCGA各亚组的患者生存率

研究采用统一阈值9.571避免过拟合,高低风险组生存差异极显著(图2B),AUC高达0.856–0.873,在性别、年龄、分期、EGFR等所有亚组中均独立稳定分层(图3)。

图3为根据性别、年龄、肿瘤分期和EGFR突变状态队列对TCGA-LUAD患者进行的Kaplan-Meier分析

(A–B)性别亚组 KM 曲线

(C–E)年龄亚组 KM 曲线

(F–H)分期亚组 KM 曲线

(I–J)EGFR 亚组 KM 曲线

均分为低风险(红)、高风险(蓝),标注 HR、95% CI 及 P 值

3.中国多中心肺腺癌队列的独立验证

研究在北京协和(195例)、南京鼓楼(88例) 两大中心验证MethPro-LUAD,采用统一阈值避免过拟合,模型在两队列中均能显著区分高低风险组(低风险组生存期更长,图4A、4B),且在协和队列各临床亚组(性别、年龄、分期)中表现稳定,同时可精准预测DFS,效果与OS一致(图4C)。

图4为不同第三方独立队列及北京协和医院(PUMCH)、南京鼓楼医院(NDTH)队列中肺腺癌(LUAD)患者的Kaplan-Meier分析

(A)北京协和医院队列(5年总生存率,OS)

(B)南京鼓楼医院队列(4年总生存率,OS)

(C)北京协和医院队列(5年无病生存率,DFS)

(D)GSE56044队列(5年总生存率,OS)

(E)GSE39279队列(5年无病生存率,DFS)的Kaplan-Meier生存曲线,分为低风险组(红色)和高风险组(蓝色)

图中展示了对应的ρ值以及具有95%置信区间(CI)的风险比(HR)。OS:总生存率;DFS:无病生存率

4.MethPro-LUAD在GEO外部队列中展现出跨人群适用性

研究选取GSE56044(82例,OS)、GSE39279(155例,DFS) 两个欧洲GEO数据集验证MethPro-LUAD,模型均能有效区分高低风险组(低风险组RMST更长,图4D、4E),两队列5年HR分别为2.37、2.19,AUC分别为0.606、0.656;结合中美欧多地区队列,证实模型跨区域、广泛适用。

5.MethPro-LUAD与辅助治疗、EGFR突变及吸烟状态相比具有预后独立性

研究按辅助治疗、EGFR突变、吸烟史分层,结果显示MethPro-LUAD在各亚组均能稳定区分高低风险,预后效能独立于上述临床因素,在化疗、放疗亚组中同样有效(图5)。

图5为依据治疗方式、表皮生长因子受体(EGFR)突变状态和吸烟状态对北京协和医院(PUMCH)和北德克萨斯医院(NDTH)患者进行的Kaplan-Meier分析

(A) 按治疗方式分层的北京协和医院队列Kaplan-Meier生存曲线:接受治疗组与未接受治疗组

(B) 按表皮生长因子受体突变状态分层的北京协和医院队列Kaplan-Meier生存曲线:表皮生长因子受体突变组与未突变组

(C) 按吸烟状态分层的北京协和医院队列Kaplan-Meier生存曲线:吸烟者与非吸烟者

(D) 按吸烟状态分层的北德克萨斯医院队列Kaplan-Meier生存曲线:吸烟者与非吸烟者

(E) 未接受治疗的北德克萨斯医院队列Kaplan-Meier生存曲线,分为低风险组(红色)和高风险组(蓝色)

图中展示了对应的p值以及风险比(HR)和95%置信区间(CI)

6.与已发表的预后模型相比,该模型的表现更优

对比已发表的30个预后模型(图6),MethPro-LUAD在HR与AUC上全面优于现有基因表达、甲基化模型及TMB,且更精简、更稳定、不易过拟合。

图6为MethPro-LUAD及其他预测模型在各队列中的ROC分析

(A和B)MethPro-LUAD模型与其他预测模型的ROC曲线(左图:mRNA组合;中图:DNA甲基化组合;右图:单基因表达与TMB),分别对应TCGA训练队列(A)和测试队列(B)

(C–E)柱状图展示了不同模型在TCGA训练队列、测试队列及其他验证队列中进行ROC分析的AUC值(C:mRNA表达或混合组合;D:甲基化组合;E:单mRNA表达与TMB)

研究结论

MethPro-LUAD是基于8个5mC探针的肺腺癌预后模型,独立于各类临床因素,在多中心、跨人群、跨平台中均高效稳定,比现有模型更简、更准、更稳,可低成本临床转化,用于术后分层与个体化诊疗。

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  1. CONNECT:[ UseTime:0.010152s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001996s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.002378s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000486s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000992s ]
  6. SELECT * FROM `set` [ RunTime:0.000422s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001091s ]
  8. SELECT * FROM `article` WHERE `id` = 533779 LIMIT 1 [ RunTime:0.001532s ]
  9. UPDATE `article` SET `lasttime` = 1776770608 WHERE `id` = 533779 [ RunTime:0.004903s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000514s ]
  11. SELECT * FROM `article` WHERE `id` < 533779 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000942s ]
  12. SELECT * FROM `article` WHERE `id` > 533779 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000800s ]
  13. SELECT * FROM `article` WHERE `id` < 533779 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002117s ]
  14. SELECT * FROM `article` WHERE `id` < 533779 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.014316s ]
  15. SELECT * FROM `article` WHERE `id` < 533779 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.002032s ]
0.278380s