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IF52.7!南京医科大揭秘:ENO2“策反”巨噬细胞促肝转移,单细胞+空间转录组立大功!

  • 2026-06-28 21:47:16
IF52.7!南京医科大揭秘:ENO2“策反”巨噬细胞促肝转移,单细胞+空间转录组立大功!

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引言

Introduction

ENO2+癌细胞究竟是如何“策反”巨噬细胞

结直肠癌肝转移“铺路”的?2026年5月5日,《Signal Transduction and Targeted Therapy》发表的一项研究,通过单细胞RNA测序

GEO数据库等分析,给出了令人意想不到的答案:

ENO2蛋白通过稳定MIF信号,诱导M2型巨噬细胞极化,成为肝转移的关键“推手”。

今天,让我们一起看看这项研究吧。

文献解读

标题ENO2驱动肿瘤细胞诱导的M2型巨噬细胞极化以促进结直肠癌肝转移

表期刊:Signal Transduction And Targeted Therapy

发表时间:2026年5月5日

影响因素:52.7

研究背景

结直肠癌肝转移是患者死亡主因,但肿瘤如何“拉拢”巨噬细胞尚不清楚。单细胞数据提示,ENO2高表达癌细胞在转移灶中富集,且与M2型巨噬细胞共定位,暗示其可能通过非代谢功能重塑免疫微环境。

研究方法

研究拿6例患者的配对样本做了单细胞测序,通过分群和模块分析锁定了ENO2⁺的癌细胞亚群。CellChat提示这群细胞通过MIF信号“勾搭”巨噬细胞促M2极化。结合Co-IP、泛素化实验和体内外功能验证,把这条轴撸了一遍。

研究结果

一、单细胞解析肠癌肝转移灶恶性升级轨迹

研究整合6例CRC患者15个样本的scRNA-seq数据,揭示肝转移灶较原发灶呈现显著恶性升级:基因组不稳定性激增,增殖与缺氧适应基因同步上调。这提示肝微环境可能作为进化筛,筛选出具高适应性的克隆,为理解转移机制提供了单细胞视角(图1

图1.单细胞图谱揭示肝转移灶中增强的恶性程度

可复现思路:

采用10x Genomics平台构建文库,利用Seurat进行标准降维聚类,结合InferCNV算法解析上皮细胞基因组不稳定性,辅以GSVA评估通路活性差异。

、模块11+亚群界定EMT驱动的转移起始细胞

通过模块分析,研究锁定“模块11”阳性癌细胞亚群,并在原发灶中定义出高表达EMT特征的亚群3。该亚群基因标签与患者不良预后显著相关,强烈提示其作为转移起始细胞的潜能,但仍需体内实验确证其定植能力(图2)

图2.基于模块分析发现转移起始态癌细胞亚群

可复现思路:

采用非负矩阵分解(NMF)提取基因模块,利用AUCell评估单细胞特征得分,结合TCGA生存数据验证模块预后价值,并通过GSVA量化上皮-间质转化通路活性。

三、ENO2驱动肠癌转移并确立治疗靶点价值

筛选证实ENO2是驱动CRLM的关键分子,其高表达与不良预后相关。体内敲除显著抑制肿瘤生长及肝转移定植(>50%),药物抑制有效阻断EMT进程。这确立了ENO2作为代谢干预靶点的潜力,但仍需更优的小分子抑制剂推动临床转化(图3

3.ENO2驱动转移进程并可作为治疗靶点

可复现思路:

利用CRISPR-Cas9构建ENO2稳转敲低株,通过脾注射构建原位肝转移模型,结合多重免疫荧光验证EMT标志物,并利用TCGA/TNMplot数据库进行泛癌种表达验证。

四、ENO2直接结合MIF驱动M2巨噬细胞极化

ENO2⁺癌细胞通过MIF信号重塑免疫微环境,实验证实ENO2与MIF存在直接物理结合并精确定位互作界面,进而驱动M2巨噬细胞极化。这一机制揭示了ENO2介导免疫逃逸的新模式,提示阻断该互作或为逆转免疫抑制提供新策略(图4)

4.ENO2通过与MIF直接相互作用,调控M2型巨噬细胞极化

可复现思路:

利用CellChat进行细胞通讯分析,结合Co-IP与质谱鉴定互作蛋白,采用GST pull-down验证直接结合,并借助分子对接与定点突变技术精确定位蛋白互作的关键结构域。

五、ENO2拮抗泛素降解稳定MIF激活促转移通路

ENO2通过直接结合MIF,阻断CHIP介导的多聚泛素化修饰,拮抗蛋白酶体降解,从而显著提升MIF蛋白稳定性。该机制依赖完整的结合界面,并持续激活下游STAT3与NF-κB信号轴,构成了驱动结直肠癌转移的关键分子开关(图5)

图5.ENO2通过抑制泛素介导的降解来稳定MIF蛋白

可复现思路:

采用PLA技术验证蛋白原位互作,利用MG132处理区分转录与翻译后调控,结合Co-IP及泛素化检测,通过回补野生型与降解缺陷型MIF验证其对下游信号通路的特异性调控。

六、ENO2-MIF轴重塑巨噬细胞促肝转移

ENO2⁺癌细胞借MIF诱导M2巨噬细胞极化,驱动肝转移。空间共定位与体内外实验佐证该轴必要性,抑制MIF或M2极化可阻断转移。但模型未能完全模拟临床免疫微环境,且忽略了其他免疫细胞亚群的潜在调控作用(图6)

6.ENO2诱导M2型巨噬细胞极化以促进肝转移

可复现思路:

结合空间转录组(10x Visium)定位细胞邻域,利用Transwell或流式细胞术检测共培养后巨噬细胞标志物变化,并通过小鼠脾注射模型验证ENO2-MIF轴对肝转移的调控功能。

七、ENO2-HSP90轴阻断CHIP降解MIF

ENO2作为支架招募HSP90,通过空间位阻阻断E3连接酶CHIP对MIF的K66位点泛素化修饰,从而拮抗其降解。回复实验证实,耗竭CHIP可逆转ENO2缺失导致的MIF失稳,完善了ENO2-HSP90-CHIP调控轴(图7)

7.ENO2招募HSP90以拮抗CHIP介导的MIF泛素化与降解

可复现思路:

采用Co-IP联合质谱鉴定互作蛋白,构建MIF赖氨酸位点突变体(K66R),利用泛素化检测与CHIP敲低回复实验,验证三元复合物对底物蛋白稳定性的调控机制。

八、靶向ENO2-MIF互作的小分子抑制剂阻断肝转移

虚拟筛选鉴定出ENO2-MIF互作抑制剂吡硫醇,其通过恢复MIF泛素化降解、阻断STAT3/NF-κB信号,显著抑制小鼠肝转移并重塑免疫微环境。这为靶向蛋白互作界面干预结直肠癌转移提供了概念验证(图8)

8.pyrithioxin作为ENO2-MIF相互作用抑制剂的鉴定及其体内抗转移效果验证

可复现思路:

采用AutoDock Vina进行高通量虚拟筛选,结合Co-IP与泛素化实验验证化合物阻断蛋白互作,利用生物发光成像监测小鼠肝转移负荷,并通过IHC评估下游信号通路抑制效果。

结论

本研究通过单细胞测序发现ENO2⁺癌细胞经MIF信号轴诱导M2巨噬细胞极化,促进结直肠癌肝转移。结合生信分析与分子对接验证,ENO2-MIF互作可作为潜在干预靶点,为转移机制解析与靶向策略开发提供了新视角。

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  1. CONNECT:[ UseTime:0.000400s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000604s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000280s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000255s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000543s ]
  6. SELECT * FROM `set` [ RunTime:0.000213s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000631s ]
  8. SELECT * FROM `article` WHERE `id` = 586671 LIMIT 1 [ RunTime:0.001888s ]
  9. UPDATE `article` SET `lasttime` = 1782678447 WHERE `id` = 586671 [ RunTime:0.000453s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000601s ]
  11. SELECT * FROM `article` WHERE `id` < 586671 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000598s ]
  12. SELECT * FROM `article` WHERE `id` > 586671 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001064s ]
  13. SELECT * FROM `article` WHERE `id` < 586671 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.003806s ]
  14. SELECT * FROM `article` WHERE `id` < 586671 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002677s ]
  15. SELECT * FROM `article` WHERE `id` < 586671 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001317s ]
0.088585s