当前位置:首页>南京>【J Hematol Oncol】南京中医药大学/南京大学团队依托PANDORA‑seq技术突破胃癌早筛瓶颈!血浆EV非经典小核酸标志物实现高灵敏早诊

【J Hematol Oncol】南京中医药大学/南京大学团队依托PANDORA‑seq技术突破胃癌早筛瓶颈!血浆EV非经典小核酸标志物实现高灵敏早诊

  • 2026-05-31 11:37:21
【J Hematol Oncol】南京中医药大学/南京大学团队依托PANDORA‑seq技术突破胃癌早筛瓶颈!血浆EV非经典小核酸标志物实现高灵敏早诊
导读
胃癌(GC)是全球癌症死亡主要诱因之一,早期诊断率低严重制约治疗效果与患者生存。
传统肿瘤标志物灵敏度不足,液体活检成为突破方向。
细胞外囊泡(EV)携带的稳定RNA是肿瘤诊断理想标志物,但受RNA修饰干扰,非经典小非编码RNA(sncRNA)的胃癌诊断价值长期未被充分挖掘。

近日,南京中医药大学、南京大学联合团队在Journal of Hematology & Oncology(IF:40.4,JCR/中科院:1/1区)发表研究Non‑canonical small noncoding RNAs in the plasma extracellular vesicles as novel biomarkers in gastric cancer。

本研究依托PANDORA‑seq技术突破RNA修饰测序障碍,首次绘制胃癌血浆EV非经典sncRNA全景图谱,筛选出3‑rs/tsRNA组合标志物,实现胃癌高灵敏、高特异早期诊断,为无创早筛提供全新方案。

方案设计&流程

本研究通过构建多队列筛选‑验证‑机制完整体系,技术路径清晰可复制:
初筛队列:30例胃癌vs 30例健康人,PANDORA‑seq测序筛选差异sncRNA
训练队列:24例胃癌vs 24例健康人,RT‑qPCR验证候选分子
验证队列:143例胃癌vs 167例健康人,评估单分子与组合诊断效能
独立测试队列:两组外部样本进一步确证稳定性
功能机制:生信预测+双荧光素酶+Western blot验证靶基因与通路
术后监测:20例患者术后水平变化评估复发监测价值
PANDORA‑seq测序实验方法、步骤、原理、分析内容、技术优势:
PANDORA‑seq技术细节、方法、样本准备、发表文章、方案设计、详细方案咨询请扫码联系:

主要内容&结果

1.胃癌血浆EV非经典sncRNA表达谱异常,rs/tsRNA是核心差异分子
研究采用PANDORA‑seq技术成功突破RNA修饰导致的测序终止问题,首次完整呈现胃癌血浆EV中小非编码RNA的全貌。测序共检出197个miRNA、519个piRNA、12789个rsRNA、1553个tsRNA、787个snoRNA,其中rsRNA与tsRNA数量最多、变化最显著
按照严格筛选标准(RPM>10,FC>10),共鉴定出43个在胃癌中显著异常表达的sncRNA,其中上调分子以tsRNA和rsRNA为主,下调分子包含piRNA等其他类型。聚类热图与散点图清晰显示,胃癌组与健康对照组sncRNA表达模式存在显著分离。
在训练队列(24GC vs 24健康)中,对排名靠前的10个上调分子进行RT‑qPCR验证,最终确定6个sncRNA在胃癌EV中稳定高表达,为后续标志物筛选奠定基础。

2. 3‑rs/tsRNA组合标志物诊断性能优异,远超传统临床指标

在扩大验证队列(119 GC vs 143健康)中,进一步锁定S2、S7、S10三个分子在胃癌中持续高表达,组间差异极显著。
(1)单分子诊断效能:
S2:AUC=0.86,灵敏度79.72%,特异度82.63%
S7:AUC=0.73,灵敏度54.55%,特异度88.62%
S10:AUC=0.86,灵敏度71.13%,特异度86.23%
(2)三分子联合诊断效能:
总队列AUC=0.91,灵敏度80.42%,特异度87.43%Ⅰ期早期胃癌AUC=0.88,灵敏度81.97%,特异度81.44%。
研究进一步构建随机森林机器学习模型,对比3‑sRNA模型、传统临床指标模型(CA19‑9CEACA125AFP)、联合模型
  • 3‑sRNA模型:AUC=0.95
  • 临床指标模型:AUC=0.70
  • 联合模型:AUC=0.95,总灵敏度提升至83.9%

结果表明,该RNA标志物组合远优于现有肿瘤标志物,可显著提升胃癌检出率。真正实现早期胃癌无创精准识别。

3.多中心独立队列验证稳定,可用于术后复发与残留监测

为确保临床实用性,研究在两个完全独立的测试队列中开展盲法验证
测试队列1(47 GC vs 47健康):组合AUC=0.97,灵敏度93.6%,特异度91.5%
测试队列2(40 GC vs 43健康):组合AUC=0.91,灵敏度85%,特异度95.4%
跨队列、大样本验证证实该标志物稳定性强、重复性好,具备临床转化潜力。
同时,对20例胃癌患者进行术后追踪检测,发现S2/S7/S10水平在手术后显著下降,提示该组合可用于术后微小残留病灶监测、复发风险预警,弥补传统影像学滞后性。

4.机制明确:直接调控ErbB/Hippo通路,兼具诊断与治疗价值

通过RNAhybrid、miRanda、GO/KEGG、双荧光素酶报告基因、Western blot等多层验证,明确三条分子的作用机制:
S2:直接结合并抑制ErbB通路(CDKN1A、PAK3)与Hippo通路(NF2、TEAD3、LATS1)
S7:靶向调控Hippo通路关键分子(SMAD4、BMP5)
S10:作用于ErbB通路(NRG4、PRKCA)与Hippo通路(LIMD1、PPP2R1B、WTIP)
这些通路均为胃癌发生、侵袭、转移的核心通路,证明该标志物不仅是诊断指标,还可作为潜在治疗靶点。

研究意义&总结

1.理论意义
首次用PANDORA‑seq全面解析胃癌血浆EV非经典sncRNA,突破传统miRNA研究局限,揭示rs/tsRNA通过ErbB/Hippo通路调控胃癌的新机制。
2.方法意义
建立 “高通量测序+多队列验证+功能机制”的EV‑sncRNA标志物开发范式,为消化道肿瘤液体活检提供标准化路径。
3.转化意义
3-rs/tsRNA组合实现胃癌无创、高灵敏早筛,优于传统肿瘤标志物,可用于高危人群筛查、早期诊断、预后监测,推动胃癌精准诊疗落地。
本研究成功开发血浆EV来源3-rs/tsRNA胃癌早诊标志物,早诊性能优异、机制明确。该标志物可实现无创、快速、精准胃癌筛查,有效弥补临床早诊短板,兼具诊断与靶向治疗双重价值,有望快速走向临床转化。

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  1. CONNECT:[ UseTime:0.000586s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000769s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.001056s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.002669s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000566s ]
  6. SELECT * FROM `set` [ RunTime:0.000311s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000583s ]
  8. SELECT * FROM `article` WHERE `id` = 563533 LIMIT 1 [ RunTime:0.018588s ]
  9. UPDATE `article` SET `lasttime` = 1780451706 WHERE `id` = 563533 [ RunTime:0.005747s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000830s ]
  11. SELECT * FROM `article` WHERE `id` < 563533 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001177s ]
  12. SELECT * FROM `article` WHERE `id` > 563533 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.002987s ]
  13. SELECT * FROM `article` WHERE `id` < 563533 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.032582s ]
  14. SELECT * FROM `article` WHERE `id` < 563533 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.004486s ]
  15. SELECT * FROM `article` WHERE `id` < 563533 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.005888s ]
0.175215s