当前位置:首页>南京>IF13.3!南京医科大学靠“多组学+机器学习+GEO”拿下中科院一区!破解结直肠癌双重耐药关键!

IF13.3!南京医科大学靠“多组学+机器学习+GEO”拿下中科院一区!破解结直肠癌双重耐药关键!

  • 2026-03-23 11:01:18
IF13.3!南京医科大学靠“多组学+机器学习+GEO”拿下中科院一区!破解结直肠癌双重耐药关键!

Introduction

引言

结直肠癌治疗总遇阻,细胞死亡通路紊乱和肿瘤微环境异质性竟是关键元凶!

✅ 结直肠癌是高发高致死的癌症,现有治疗下耐药问题突出,精准分型指导治疗成迫切需求。

✅ 细胞死亡通路调控着治疗反应,但其与肿瘤微环境的关联,在结直肠癌中仍未被厘清。

✅ 南京医科大学聚焦细胞死亡相关亚型,挖掘其与免疫、治疗的关联,为破解结直肠癌耐药难题找新方向。

 一起来拆解背后的思路框架吧~

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研究背景

结直肠癌治疗耐药是临床难题,程序性细胞死亡通路失调影响治疗反应,但其在塑造肿瘤微环境、引发结直肠癌临床异质性中的综合作用仍未明确。

研究方法
01

数据来源与预处理

公共数据库:从 GEO、TCGA、ArrayExpress 等获取 1140 例 COAD 患者多维度数据及药物敏感性数据。

■ 预处理:fRMA 标准化、ComBat 去批次效应,多探针基因取平均表达值。

02

亚型分型与验证

机器学习:基于 12 类 PCD 通路相关基因,用 NMF 聚类分 3 种 PCDS 亚型。

■ 机器学习:通过 NTP 算法,在独立队列验证亚型分类稳健性。

03

特征分析

■ 转录组:差异基因、功能富集分析;

■ 基因组:TMB、驱动基因突变、MSI 状态分析;

■ 单细胞 / 空间转录组:细胞聚类、伪批量谱构建、配体 - 受体共定位分析。

■ 免疫与临床分析:免疫浸润、TIDE 评分,生存分析及放化疗响应评估。

(研究设计示意图。

研究结果
COAD 分子亚型鉴定

■ 整合 12 种 PCD 通路基因,通过 NMF 聚类将 1140 例患者分为 3 种 PCDS 亚型(PCDS1、PCDS2、PCDS3),筛选出 303 个亚型特征基因

■ 亚型与 CMS 分类存在重叠与差异:56.15% PCDS2 对应 CMS2,75% PCDS3 对应 CMS4。

■ 独立队列(TCGA、ArrayExpress)验证显示,亚型分类稳健可重复。

(PCDS的定义与鲁棒性验证。

亚型基因与预后特征

■ 各亚型 PCD 通路激活模式不同,MMR、MSI 状态分布存在显著差异。

■ PCDS1 和 PCDS3 的 TMB 及新抗原负荷显著高于 PCDS2,APC、TP53 等驱动基因突变频率在亚型间有明显差异。

■ 生存分析证实,PCDS3 预后最差,在多个独立数据集均一致。

(PCDS遗传特征及临床结局的特征性表征。

亚型治疗响应差异

PCDS1 对免疫治疗敏感(响应率 61.76%-67.08%),PCDS3 双重耐药(80% 以上对放化疗无响应),PCDS2 从化疗中获益。

■ PCDS3 免疫抑制分子(PD-L1、CTLA-4 等)表达高,T 细胞功能障碍与排斥评分显著升高。

(PCDS对化疗/免疫治疗的差异性反应。

TME 与细胞互作特征

■ 单细胞分析识别 9 类主要细胞类型,PCDS3 中内皮细胞和成纤维细胞富集,iCAF 浸润最高。

(不同PCDS患者肿瘤微环境的描述。

■ PCDS3 中肿瘤细胞与成纤维细胞通过 MDK–SDC2 配体 - 受体轴互作,与 T 细胞排斥相关。

(不同PCDS中成纤维细胞的表征。

■ mIF 验证显示,肿瘤组织中 MDK–SDC2 共定位率更高,且与 T 细胞耗竭正相关。

(MDK-SDC2介导的肿瘤-纤维细胞相互作用与T细胞功能障碍及排除之间的关联。

靶向药物筛选结果

■ SDC2 在 PCDS3 中高表达,通过 oncoPredict 筛选出舒尼替尼为潜在靶向药物 。

■ 舒尼替尼对 PCDS3 的 IC50 显著更低,分子对接显示其与 SDC2 高亲和力结合(S-score 最低 - 17.2199)。

(识别PCDS3患者潜在靶向药物。

文章小结

总而言之,本研究构建了结直肠癌 PCDS 分子分型,揭示三类亚型的免疫与治疗差异,发现 PCDS3 亚型的 MDK–SDC2 轴促耐药机制,为该亚型提供舒尼替尼靶向治疗新思路,助力精准诊疗发展。

在生信领域,一篇高分文章的核心竞争力往往在于思路的创新性!如果您也想利用“GEO+多组学+机器学习”冲击高分,联系“科研站”,为您提供更完善的角度!

往期回顾:

IF8.3!恭喜湖北文理学院靠“多组学+机器学习”拿下双一区TOP!解锁肺腺癌脑转移早期预警新路径!

IF14.1!恭喜浙江大学李雪团队0实验发双一区TOP刊!揭示烟雾暴露通过DNA甲基化提升子代IBD风险!

IF32.1!恭喜哈工大王亚东/程亮团队靠“多组学+机器学习”拿下《Nature》子刊!直接打通代谢组与细胞状态反卷积分析!

IF48.5!生物学DeepSeek来了!恭喜华人学者联合英伟达靠“机器学习”拿下《Nature》正刊!

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  1. CONNECT:[ UseTime:0.000482s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000792s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.001150s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000289s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000509s ]
  6. SELECT * FROM `set` [ RunTime:0.000199s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000486s ]
  8. SELECT * FROM `article` WHERE `id` = 512543 LIMIT 1 [ RunTime:0.000994s ]
  9. UPDATE `article` SET `lasttime` = 1774253117 WHERE `id` = 512543 [ RunTime:0.004426s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000253s ]
  11. SELECT * FROM `article` WHERE `id` < 512543 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000429s ]
  12. SELECT * FROM `article` WHERE `id` > 512543 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000369s ]
  13. SELECT * FROM `article` WHERE `id` < 512543 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.005097s ]
  14. SELECT * FROM `article` WHERE `id` < 512543 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001323s ]
  15. SELECT * FROM `article` WHERE `id` < 512543 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.004523s ]
0.090697s