当前位置:首页>南京>南京中医药大学刘武昆《Angew》|靶向线粒体DNA诱导焦亡,Au(III)配合物重塑肿瘤免疫微环境实现高效免疫治疗!

南京中医药大学刘武昆《Angew》|靶向线粒体DNA诱导焦亡,Au(III)配合物重塑肿瘤免疫微环境实现高效免疫治疗!

  • 2026-07-15 08:50:20
南京中医药大学刘武昆《Angew》|靶向线粒体DNA诱导焦亡,Au(III)配合物重塑肿瘤免疫微环境实现高效免疫治疗!
中科院长春应化所丁彬彬、马平安、林君团队领衔《Angew》|肿瘤GSH原位制造氧空位!三重催化放大声动力治疗诱导铁死亡与凋亡!
01
Author Profile
作者简介

本次分享一篇2026年 7 月发表在  Angew  上的文章该文章的通讯作者为南京中医药大学的刘武昆教授,其主要从事新型硫氧还蛋白还原酶抑制剂、免疫原性细胞死亡诱导剂和选择性雌激素受体下调剂的设计、合成与抗肿瘤活性研究等。

02
Understand in one sentence
一句话看懂

作者设计并合成了一种新型阳离子Au(III) Schiff碱配合物Au9,通过选择性靶向线粒体DNA(mtDNA),协同抑制TrxR活性、诱导ROS积累和内质网应激,激活caspase-3/GSDME介导的焦亡,同时增强免疫原性细胞死亡和抗肿瘤免疫反应,实现高效肿瘤治疗。

03
Why is it important?
为什么重要?

近年来,诱导焦亡(Pyroptosis)已成为肿瘤治疗的重要研究方向,其不仅能够直接杀伤肿瘤细胞,还可释放大量炎症因子和损伤相关分子模式(DAMPs),进一步激活抗肿瘤免疫。然而,目前能够稳定、高效诱导焦亡并同步激活免疫反应的小分子药物仍然十分有限,尤其针对线粒体DNA(mtDNA)这一新型治疗靶点的研究尚处于起步阶段,因此开发能够精准靶向mtDNA并诱导焦亡的新型金属药物具有重要意义。

04
Research Background
研究背景

线粒体DNA不仅维持线粒体正常功能,同时也是ROS攻击最敏感的遗传物质之一。当mtDNA受到损伤后,可进一步诱导线粒体功能紊乱及炎症反应,而金配合物具有良好的线粒体富集能力及TrxR抑制活性,因此被认为是开发新型抗肿瘤药物的重要候选。然而,目前Au(III)配合物诱导焦亡的具体机制尚未阐明,也缺乏能够同时实现mtDNA损伤、焦亡诱导及肿瘤免疫激活的一体化设计策略。

05
Research Background
本文核心创新

本文首次提出利用Au(III) Schiff碱配合物靶向线粒体DNA诱导焦亡的新策略,构建了具有优异稳定性的Au9配合物,实现了"mtDNA损伤—TrxR抑制—ROS积累—ER应激—caspase-3/GSDME焦亡"的连续调控过程,并进一步诱导免疫原性细胞死亡和肿瘤免疫微环境重塑,为金属免疫治疗药物设计提供了新的研究思路。

06
Research Background
设计策略

作者以DACH为骨架配体构建九种阳离子Au(III) Schiff碱配合物,通过构效关系筛选获得活性最优的Au9。由于Au9具有阳离子特性,可优先在线粒体内富集,并结合双链mtDNA造成损伤,同时抑制TrxR活性,引发ROS持续积累、线粒体损伤及内质网应激,最终激活caspase-3切割GSDME诱导焦亡,并通过释放DAMPs进一步促进DC成熟及T细胞激活,实现直接杀伤与免疫激活双重治疗作用。

07
Research Results
研究成果

实验结果表明,Au9在多种肝癌细胞中均表现出优异的抗肿瘤活性,并显著优于临床药物Auranofin;进一步研究发现,Au9主要定位于线粒体并结合mtDNA,导致mtDNA表达下降,同时有效抑制TrxR活性,引起ROS爆发、线粒体损伤及ER应激。随后,Au9通过激活caspase-3/GSDME通路诱导典型焦亡,表现为细胞肿胀、膜起泡、LDH及ATP大量释放,而GSDMD并未被激活,证明其属于GSDME依赖性焦亡。此外,Au9能够促进HMGB1释放和CRT暴露,诱导典型ICD,并促进DC成熟;在荷瘤小鼠模型中,Au9不仅显著抑制肿瘤生长,还提高了肿瘤内CD4⁺/CD8⁺ T细胞浸润、降低Treg比例,并在体内再次验证了GSDME裂解及mtDNA释放,最终实现焦亡与肿瘤免疫协同增强。

08
Key data
关键数据

首先,合成了九种阳离子Au(III)席夫碱配合物(Au1–Au9),其中Au9具有平面方形结构,对肝癌细胞表现出最强的抗增殖活性,并能有效抑制3D肿瘤球生长。

图1

其次Au9通过嵌插和沟槽结合方式与ctDNA相互作用,并选择性富集于线粒体,与mtDNA形成氢键结合,显著降低细胞内mtDNA含量。

图2

接下来Au9抑制硫氧还蛋白还原酶(TrxR)活性,诱导ROS和线粒体ROS生成,降低线粒体膜电位,并激活内质网应激(ERS)相关蛋白(CHOP、Calnexin、GRP78)表达。

图3

Au9诱导Huh7细胞发生典型的细胞焦亡形态变化(肿胀、起泡、膜穿孔),促进LDH和ATP释放,并通过激活caspase-3/GSDME通路介导焦亡,且Au9可与GSDME蛋白结合增强其热稳定性。

图4

着,Au9处理可上调HMGB1和CRT的释放/暴露,诱导免疫原性细胞死亡(ICD),并显著促进树突状细胞(DCs)成熟,效果优于奥沙利铂。

图5

之,在Hepa1-6荷瘤小鼠模型中,Au9(5 mg/kg)有效抑制肿瘤生长,且不引起体重下降和主要脏器损伤,同时显著增加肿瘤内成熟DCs和CD4⁺/CD8⁺ T细胞浸润。

图6

后,体内免疫荧光和WB证实Au9诱导肿瘤组织内GSDME-NT表达升高、mtDNA释放至细胞质,并促进DCs成熟、T细胞活化,同时抑制Tregs(Foxp3⁺)浸润。

图7

09
Summary and Outlook
总结与展望

总之,该工作首次系统揭示了Au(III)配合物通过靶向线粒体DNA诱导GSDME依赖性焦亡并激活抗肿瘤免疫的分子机制,成功建立了"mtDNA损伤—焦亡诱导—ICD激活—免疫微环境重塑"的完整治疗链路,不仅拓展了Au(III)配合物的抗癌机制,也为开发兼具直接杀伤与免疫调控能力的新型金属抗肿瘤药物提供了新的设计理念和理论基础。

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论文链接DOI: 10.1002/anie.4247438

期刊影响因子: 17.6

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原文链接点击阅读原文

声明:本文对研究论文的解读仅出于传播和交流肿瘤治疗领域学术进展的目的,旨在为读者提供前沿科研动态参考。文章内容不代表对原始文献数据真实性、科学性及临床适用性的判断或背书。读者如需引用或进一步验证,请务必查阅论文原文以获取完整信息。研究的具体临床应用需以后续权威机构评估结果为准。

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  1. CONNECT:[ UseTime:0.000592s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000868s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000359s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.002258s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000537s ]
  6. SELECT * FROM `set` [ RunTime:0.004971s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000928s ]
  8. SELECT * FROM `article` WHERE `id` = 598096 LIMIT 1 [ RunTime:0.005114s ]
  9. UPDATE `article` SET `lasttime` = 1784227241 WHERE `id` = 598096 [ RunTime:0.014103s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000429s ]
  11. SELECT * FROM `article` WHERE `id` < 598096 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000565s ]
  12. SELECT * FROM `article` WHERE `id` > 598096 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000473s ]
  13. SELECT * FROM `article` WHERE `id` < 598096 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.003728s ]
  14. SELECT * FROM `article` WHERE `id` < 598096 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.007434s ]
  15. SELECT * FROM `article` WHERE `id` < 598096 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.003798s ]
0.118606s