当前位置:首页>南京>南京医科大学通过“AI+中药”避开肿瘤耐药内卷(IF=10.3)!从影像建模到天然产物,「黄芩苷」靶向GRP75调控MAM-自噬轴新发现

南京医科大学通过“AI+中药”避开肿瘤耐药内卷(IF=10.3)!从影像建模到天然产物,「黄芩苷」靶向GRP75调控MAM-自噬轴新发现

  • 2026-04-17 01:22:42
南京医科大学通过“AI+中药”避开肿瘤耐药内卷(IF=10.3)!从影像建模到天然产物,「黄芩苷」靶向GRP75调控MAM-自噬轴新发现

小汇今日高分文献分享

IF=10.3

AI影像组学+中药分子机制

从无创分型到中药靶标

揭示GRP75调控肝癌耐药新机制!

在肿瘤研究不断向精准化、跨学科方向推进的过程中,肿瘤异质性带来的药物响应差异,一直是肝癌相关研究中需要持续探索的关键问题。如何用无创方式识别关键分子表型,如何从传统药物资源中找到特异性调控分子,如何搭建从表型分型到机制验证的完整链条,成为基础研究热门方向。今天小汇分享的这篇文章,影像组学、机器学习、分子对接、药理机制验证融为一体,形成“无创分型-靶向筛选-机制验证”的完整科研范式,不仅技术交叉性强、逻辑严谨、创新点突出,还为我们带来了一份可复制的高分科研范式。

2026年2月19日,南京医科大学周春晓/李远团队International Journal of Surgery上发表了题为Intelligent identification and targeted intervention of GRP75-caused drug resistant hepatocellular carcinoma, a study based on radiomics, machine learning, and molecular pharmacology的文章,研究以GRP75为核心分子,搭建AI辅助的影像组学无创分型体系,实现肝癌(HCC)GRP75相关预后亚型的精准区分;同时借助中药数据库与分子模拟技术,确定黄芩苷为GRP75靶向单体,并从细胞、动物层面阐明其通过线粒体相关内质网膜(MAM)结构-钙信号-自噬轴调控肝癌耐受的机制。

现有研究多单独聚焦影像分型或耐药通路,缺乏无创识别与靶点干预的整合设计。本研究以肝癌耐药异质性核心分子GRP75为切入点,将AI影像组学用于分子表型分型,结合中药网络药理学与分子模拟筛选中药靶标,提出并验证了不依赖p53的GRP75–MAM–钙/自噬轴调控肝癌耐受的机制,不仅形成了从无创分型、靶标筛选到机制验证的完整研究体系,也为肿瘤异质性、AI 影像与中药靶标交叉方向提供了可借鉴的研究范式。

Q

如何免费获取创新思路?

+V细聊:huiyizhuyan888

数据难转化,实验做不好,资源难整合,小汇24小时随时在线,为您免费提供基础科研思路!

如果您也想基于肿瘤异质性+AI影像+中药靶标开发更多创新课题研究,欢迎联系小汇喔,课题指导/方案设计/定制分析/实验验证,小汇这里应有尽有~(PS:文献资料也欢迎来找我)

A

研究思路

  1. 临床分型与建模:根据GRP75表达水平与患者预后,将术后复发HCC人群分为HGPP、LGGP、NCGP三组。利用多中心CT影像提取1688个影像组学特征,经LASSO筛选后构建双机器学习模型(RF/SVM),用于无创识别GRP75驱动的耐药亚群。

  2. 药物虚拟筛选:为寻找靶向GRP75的小分子,系统挖掘TCM数据库,初筛得丹参、柴胡等中药。通过口服生物利用度、类药性过滤及分子对接,从候选化合物中筛选出与GRP75亲和力最优的黄芩苷,并经BLI验证其结合能力。

  3. 靶点机制解析:通过分子对接对比发现,黄芩苷结合GRP75的位点与VDAC1高度重叠,而非p53。据此假设其可能破坏IP3R-GRP75-VDAC1复合体。随后通过Co-IP验证互作减弱,TEM直接观察MAM间距增加。

  4. 表型与功能验证:在GRP75过表达耐药细胞(HuH7GRP75, HepG2MDR)中,检测黄芩苷处理后线粒体/ER钙离子浓度及自噬流(LC3B/p62)。明确其通过抑制MAM介导的钙转运,下调保护性自噬,从而恢复对顺铂/索拉非尼的敏感性。

基于放射组学、机器学习和分子药理学的GRP75引起药物耐受性肝细胞癌的智能识别与靶向干预研究。

论文亮点解析

1、研究对象创新:聚焦GRP75这一驱动异质性的关键分子,把“影像表型”与“分子机制”强绑定,避免泛泛而谈。

2、技术组合创新:放射组学+AI+中药网络药理学+分子药理,实现“无创识别—靶向干预—机制阐明”的完整闭环。

3、模型设计创新:采用双模型三分类策略,直接区分GRP75高表达差预后、低表达好预后、无显著关联三组,比传统二分类更精细。

4、机制创新:跳出经典GRP75‑p53通路,提出MAM结构—钙信号—自噬轴新机制,且在p53突变与野生型背景中均得到验证。

5、转化创新:从临床影像问题出发,落地到天然小分子,安全性与成药性潜力更突出,适合基础向转化延伸。

结果图示

模型构建与验证

研究根据GRP75免疫组化评分与患者中位生存期,将术后复发的肝癌患者分为三组——HGPP(高表达且预后差)、LGGP(低表达且预后好)、NCGP(表达与预后不相关)。基于此分组,建立了包含两个串联机器学习模型(先识别HGPP,再识别LGGP)的识别系统。

图1.建模队列分组与模型流程构建。

从CT图像中提取1688个组学特征,经ICC质控、t检验、相关性分析、LASSO回归四步筛选,最终模型1保留13个关键特征,模型2保留11个关键特征,特征类型与肿瘤内部异质性、强化模式相关。

图2.放射组学特征提取与筛选。

模型 1(识别HGPP) 选用RF算法、模型2(识别LGGP)选用SVM算法,在训练集、测试集及双外部验证集中均表现良好区分度,校准曲线显示预测概率与实际情况一致性良好,DCA 提示模型具备决策参考价值;事后统计功效分析证实样本量满足建模要求。

图3.预测模型构建与效能评估。

全局水平展示关键组学特征的贡献程度,关联影像表型与生物学意义;个体水平可视化4类典型对象的特征贡献,清晰呈现模型判断依据,提升研究可解释性。

图4.模型SHAP可解释性分析。

靶向药物筛选

整合五大中药数据库筛选潜在干预药材,经口服生物利用度、类药属性筛选,得到黄芩苷、亚油酸、油酸3个候选单体;分子对接显示黄芩苷与GRP75结合能最优,分子动力学模拟证实复合物结构稳定,确定黄芩苷为候选化合物。

图5.靶向GRP75中药单体筛选与验证。

作用机制解析

分子对接显示黄芩苷结合位点与p53/MKT077位点不重叠,与VDAC1结合区域高度重合;生物信息学分析显示GRP75调控基因富集于线粒体功能、Ca2+转运、自噬等通路;提出黄芩苷通过破坏MAM结构、调控钙/自噬轴发挥作用的科学假设。

图6.黄芩苷作用机制预测。

BLI实验证实黄芩苷与GRP75具有高结合亲和力;Co-IP与WB结果显示黄芩苷可减弱GRP75与VDAC1的相互作用;透射电镜观察到黄芩苷可增加内质网与线粒体间距,降低MAM稳定性;荧光成像显示线粒体钙离子水平下降,自噬相关蛋白LC3B表达降低、p62表达升高。

图7.黄芩苷对GRP75及下游通路的调控。

体外细胞水平验证

在GRP75过表达HuH7细胞与耐药HepG2细胞中,黄芩苷可改变细胞对药物的响应状态;敲低GRP75后,黄芩苷的调控作用明显减弱,证实效应具有GRP75依赖性;与MKT077对比,证实黄芩苷的作用不依赖p53状态。

图8.黄芩苷体外功能验证。

体内动物模型验证

在GRP75过表达细胞移植瘤模型中,黄芩苷联合顺铂或索拉非尼可协同抑制肿瘤生长。同时,黄芩苷能下调瘤内GRP75及LC3B水平,且单独给药对小鼠肝肾功能及组织结构无明显影响,具备良好安全性。

图9.黄芩苷体内功能验证。

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参考文献:

http://dx.doi.org/10.1097/JS9.0000000000004913                  

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  1. CONNECT:[ UseTime:0.000876s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001361s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000687s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.001662s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001281s ]
  6. SELECT * FROM `set` [ RunTime:0.000466s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001350s ]
  8. SELECT * FROM `article` WHERE `id` = 534446 LIMIT 1 [ RunTime:0.002313s ]
  9. UPDATE `article` SET `lasttime` = 1776734056 WHERE `id` = 534446 [ RunTime:0.001407s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000622s ]
  11. SELECT * FROM `article` WHERE `id` < 534446 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.003535s ]
  12. SELECT * FROM `article` WHERE `id` > 534446 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.011575s ]
  13. SELECT * FROM `article` WHERE `id` < 534446 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.010733s ]
  14. SELECT * FROM `article` WHERE `id` < 534446 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001539s ]
  15. SELECT * FROM `article` WHERE `id` < 534446 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.003321s ]
0.193117s