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Phytomedicine南京中医药大学团队揭示桔梗皂苷D抗击肺癌作用

  • 2026-05-09 15:31:30
Phytomedicine南京中医药大学团队揭示桔梗皂苷D抗击肺癌作用
01
研究概述
桔梗皂苷D直击肺癌软肋 让肿瘤细胞一边死亡一边“报警”
肺癌治疗最棘手的问题之一,在于肿瘤细胞既顽强,又善于逃避免疫识别。南京中医药大学李育教授等在期刊Phytomedicine发表最新研究论文《Platycodon D Promotes Immunogenic Cell Death in Lung Cancer Cells by Targeting NFS1 to Induce PANoptosis》,发现中药桔梗中的活性成分桔梗皂苷D,能够靶向肺癌关键分子 NFS1,诱导肺癌细胞发生 PANoptosis,并进一步激活免疫原性细胞死亡,增强机体对肿瘤的免疫清除能力。这项研究不仅揭示了桔梗皂苷D新的抗肺癌机制,也为肺癌免疫治疗增敏提供了值得关注的新思路。
第一作者:Mingjie Wu,Jia Wang
通讯作者:Mianli Bian,Chunxiang Zhou,Xu Qi,Yu Li
02
NFS1:肺癌潜在治疗靶点
研究团队首先从临床样本入手,发现 NFS1 在肺癌组织中明显高表达,患者血清中的 NFS1 水平也显著高于健康人群。组织学结果显示,肺癌组织细胞异型性明显,胶原沉积增加,纤维化和基质重塑活跃,而 NFS1 在肿瘤组织中的表达范围广、强度高。这说明 NFS1 很可能不是一个普通伴随变化,而是肺癌细胞维持生存的重要依赖分子,也因此成为一个很有潜力的治疗靶点。
03
桔梗皂苷D诱导肺癌细胞PANoptosis
在细胞实验中,桔梗皂苷D对人肺癌 A549 细胞和小鼠 Lewis 肺癌细胞均表现出明确的抑制作用,而且呈剂量依赖关系。随着药物浓度升高,肿瘤细胞增殖持续下降。与此同时,促凋亡蛋白 Bax 升高,抗凋亡蛋白 BCL 2 下调,细胞内活性氧显著积累,线粒体膜电位明显下降,提示细胞处于强烈氧化应激和线粒体功能失衡状态。更重要的是,研究并没有把这种死亡简单归为某一种模式,而是进一步证明桔梗皂苷D同时激活了焦亡、凋亡和坏死性凋亡三条通路。多个关键蛋白同步上调,三类抑制剂单独使用都只能部分挽救细胞死亡,只有联合阻断时才能更明显地抑制这一过程,说明桔梗皂苷D诱导的是更具破坏力的 PANoptosis。
04
连接细胞死亡与抗肿瘤免疫
这项工作的另一大亮点,是把肿瘤细胞死亡与抗肿瘤免疫真正连了起来。转录组分析显示,桔梗皂苷D处理后,肿瘤细胞中与免疫调控、氧化还原和能量代谢相关的通路发生了显著变化。随后,研究人员检测到 ATP 和 HMGB1 等免疫原性细胞死亡标志物明显释放,CRT 表达升高,说明肿瘤细胞在死亡过程中并不是悄无声息地“消失”,而是在向免疫系统主动发出危险信号。进一步实验发现,经桔梗皂苷D处理后的肿瘤细胞上清液能够促进树突状细胞成熟,同时肿瘤组织中 CD8 阳性 T 细胞浸润增加,体内树突状细胞和 T 细胞比例同步升高。这意味着桔梗皂苷D不仅能杀伤肿瘤,还能把肿瘤死亡转化为一次更有效的免疫动员。
05
验证NFS1为桔梗皂苷D的核心靶点
为了确认 NFS1 是否是关键靶点,研究团队做了更深入的验证。分子对接结果提示桔梗皂苷D与 NFS1 具有较强结合能力。随后进行的 CETSA 和 DARTS 实验进一步证明,桔梗皂苷D能够直接结合 NFS1。与此同时,无论在 A549 还是 LLC 细胞中,桔梗皂苷D都可剂量依赖性地下调 NFS1 表达。也就是说,这种天然产物不是泛泛地“调一调通路”,而是抓住了肺癌代谢依赖中的一个关键节点。
更有说服力的是功能互作实验。敲低 NFS1 后,肺癌细胞内活性氧进一步升高,线粒体损伤更重,细胞死亡更明显,桔梗皂苷D的抑瘤作用被进一步放大。相反,当 NFS1 过表达时,活性氧积累减少,PANoptosis 相关蛋白下调,桔梗皂苷D诱导的细胞死亡也明显减弱。这一正反两方面结果共同说明,NFS1 的确是桔梗皂苷D发挥抗肿瘤作用的核心支点。
06
动物实验验证与安全性
在动物实验中,这一机制同样得到了验证。无论是在皮下移植瘤模型还是原位肺癌模型中,桔梗皂苷D都能显著抑制肿瘤生长,降低肿瘤体积和重量,并增加肿瘤组织中的凋亡信号。更值得关注的是,治疗过程中小鼠体重基本稳定,肝肾功能指标和主要脏器病理未见明显异常,显示出较好的安全性。若进一步联合 NFS1 敲低,肿瘤抑制效果更强,血清 IFNγ 以及 IL 6、IL 8、IL 1β 等免疫相关因子水平更高,肿瘤内 CD3 和 CD8 阳性 T 细胞浸润更明显,提示这种策略有望把免疫反应进一步推向有利于清除肿瘤的一侧。
https://www.sciencedirect.com/science/article/pii/S0944711326004836#abs0001
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  1. CONNECT:[ UseTime:0.000515s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000616s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000460s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000426s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000523s ]
  6. SELECT * FROM `set` [ RunTime:0.000264s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000596s ]
  8. SELECT * FROM `article` WHERE `id` = 545858 LIMIT 1 [ RunTime:0.002812s ]
  9. UPDATE `article` SET `lasttime` = 1778987042 WHERE `id` = 545858 [ RunTime:0.003287s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000289s ]
  11. SELECT * FROM `article` WHERE `id` < 545858 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000541s ]
  12. SELECT * FROM `article` WHERE `id` > 545858 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000372s ]
  13. SELECT * FROM `article` WHERE `id` < 545858 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001682s ]
  14. SELECT * FROM `article` WHERE `id` < 545858 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001210s ]
  15. SELECT * FROM `article` WHERE `id` < 545858 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001874s ]
0.088772s