当前位置:首页>南京>IF11.20!问鼎顶刊!南京大学牵头借GEO+机器学习实现新突破,斩获1区顶刊,解锁肿瘤克隆演化解码新框架!

IF11.20!问鼎顶刊!南京大学牵头借GEO+机器学习实现新突破,斩获1区顶刊,解锁肿瘤克隆演化解码新框架!

  • 2026-05-09 13:35:24
IF11.20!问鼎顶刊!南京大学牵头借GEO+机器学习实现新突破,斩获1区顶刊,解锁肿瘤克隆演化解码新框架!

❓为何单细胞转录组数据难以精准解析肿瘤克隆演化,传统方法易受噪声干扰、克隆分型与谱系重建脱节?

华大智造、南京大学、中科院杭州医学所团队研发scRevol模型,依托GEO数据库,基于强化学习构建单细胞肿瘤克隆演化分析框架,通过CNV 嵌入优化、智能聚类、MST 演化树重建,突破传统方法局限。

实验表明,scRevol 在模拟数据、谱系示踪数据及卵巢癌数据中表现稳健,克隆识别更准、谱系还原度更高,可精准定位高转移克隆、解析原发与转移灶亚克隆结构,为肿瘤异质性研究与精准诊疗提供高效工具。

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文献解读
TIZI YOGA
yanjiubeijing
研究背景
肿瘤演化伴随高度细胞异质性,是癌症进展、转移与治疗耐药的核心驱动力,精准解析克隆结构与演化轨迹对精准肿瘤学至关重要。传统 bulk 测序难以捕捉单细胞水平的克隆差异,单细胞 DNA 测序通量低、基因组覆盖度有限,而基于单细胞转录组(scRNA-seq)的现有方法多将克隆分型与谱系重建拆分为独立模块,存在强模型假设、数据要求苛刻、抗噪声能力弱、克隆与演化关联度低等缺陷,难以高效、准确地从噪声较多的 scRNA-seq 数据中重建肿瘤克隆演化轨迹。

yanjiumudi
研究目的

开发基于强化学习的单细胞肿瘤演化分析模型 scRevol,解决现有方法克隆分型与谱系重建脱节、抗噪声差、准确性不足的问题,实现从单细胞转录组数据中精准识别肿瘤克隆、稳健重建克隆演化轨迹,并揭示克隆异质性与转移、临床表型的关联,为肿瘤演化研究提供高效可靠的计算框架。


yanjiu fangfa
研究方法

模型构建开发scRevol框架,将无监督聚类转化为马尔可夫决策过程(MDP),采用近端策略优化(PPO)算法优化潜在嵌入,结合KL 散度约束与 PCA 初始化提升训练稳定性与嵌入鲁棒性。

克隆分型基于优化后的 CNV 嵌入完成细胞聚类,生成稳定克隆标签。

演化树重建使用最小生成树(MST) 算法,基于克隆中心距离构建肿瘤克隆演化树。

数据来源依托Figshare 模拟数据集、GEO(GSE161363)肺癌谱系示踪数据、VIB‑KU Leuven 卵巢癌 scRNA‑seq 数据开展验证。

对比与评估以 K‑means、Leiden、SCEVAN、Clonalscope 为基线,采用LCC、PCD、TC、ARI、NMI等指标量化性能;结合富集分析、差异表达、假时间分析解析克隆功能与转移特征。

研究结果
TIZI YOGA
模型框架有效性

scRevol 形成 “标签分配学习→克隆聚类→演化树构建” 完整流程,可稳定从 CNV 矩阵解析肿瘤克隆结构与演化轨迹,适配模拟数据、转移异质性分析、临床生物学挖掘三大场景。

图1.scRevol 用于肿瘤演化建模与生物学解析的工作流程

模拟数据集性能最优

在 485 组模拟数据中,scRevol 的ARI、NMI、LCC、PCD、TC等指标全面领先 K‑means、Leiden、SCEVAN、Clonalscope 等方法;克隆数目预测准确、谱系拓扑还原度高,高噪声下仍保持稳定,与真实克隆高度匹配。

图2.基于模拟数据的性能评估。(A) 各方法的平均ARINMI

肺癌转移克隆精准识别
成功划分10 个克隆群,清晰定位 c0、c3 等高转移潜能克隆;克隆分型与谱系标签一致性(ARI=0.443)显著高于同类方法;克隆特征与黏着斑、未折叠蛋白反应等转移通路高度关联,局部谱系一致性(LNC_NES)表现最佳。

图3.克隆群特征及谱系间转移异质性分析

卵巢癌克隆与演化清晰解析
精准区分肿瘤 / 正常细胞(肿瘤纯度>0.96),重建克隆演化树;克隆分布与假时间轨迹高度一致,不同亚克隆呈现炎症应答、DNA 修复、增殖等 distinct 功能特征,可稳定识别 BRCA1/BRCA2 高表达克隆。

图4.基于 scRevol 分析解析克隆演化与功能动态

原发‑转移灶亚克隆全景揭示

明确卵巢、大网膜、腹膜的克隆分布,识别跨组织共享克隆 C5与部位特异亚克隆;演化时序与假时间吻合,早期克隆富集免疫相关通路,晚期克隆富集 TGFβ/WNT 等免疫抑制通路,完整呈现肿瘤转移演化规律。

图5.基于 scRevol 推断的高级别浆液性卵巢癌(HGSOC)克隆动态与功能图谱

小结

本研究成功构建scRevol强化学习框架,依托模拟数据、GEO 谱系示踪数据及卵巢癌单细胞数据库,经聚类优化与演化树重建,实现肿瘤克隆精准识别与谱系轨迹高效还原。结果显示,该模型在抗噪声、克隆分型、拓扑一致性上全面优于现有方法,可清晰揭示肿瘤转移异质性、原发‑转移亚克隆演化时序及功能特征,为单细胞水平肿瘤克隆演化研究提供稳定可靠的新工具。

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▼往期回顾▼

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  1. CONNECT:[ UseTime:0.000524s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000842s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000308s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000261s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000562s ]
  6. SELECT * FROM `set` [ RunTime:0.000216s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000631s ]
  8. SELECT * FROM `article` WHERE `id` = 541507 LIMIT 1 [ RunTime:0.000443s ]
  9. UPDATE `article` SET `lasttime` = 1779359508 WHERE `id` = 541507 [ RunTime:0.000891s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000260s ]
  11. SELECT * FROM `article` WHERE `id` < 541507 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000534s ]
  12. SELECT * FROM `article` WHERE `id` > 541507 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000444s ]
  13. SELECT * FROM `article` WHERE `id` < 541507 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000816s ]
  14. SELECT * FROM `article` WHERE `id` < 541507 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000886s ]
  15. SELECT * FROM `article` WHERE `id` < 541507 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000982s ]
0.077195s