当前位置:首页>南京>南京大学赵晓智团队Adv. Sci. | 双重草本构筑高缺陷中药碳点纳米酶,靶向干预肾脏缺血再灌注损伤

南京大学赵晓智团队Adv. Sci. | 双重草本构筑高缺陷中药碳点纳米酶,靶向干预肾脏缺血再灌注损伤

  • 2026-06-01 04:40:56
南京大学赵晓智团队Adv. Sci. | 双重草本构筑高缺陷中药碳点纳米酶,靶向干预肾脏缺血再灌注损伤
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肾脏缺血再灌注(I/R)损伤是急性肾损伤(AKI)主要诱因,氧化应激与炎症恶性循环加重肾损伤,缺少特异性治疗药物。南京大学医学院附属鼓楼医院赵晓智研究团队黄芪-当归经典药对制备复合碳点AM-AS@CDs,打破单味药碳点局限,凭借高类SOD抗氧化活性,阻断氧化-炎症环路,实现肾脏靶向保护。相关成果以“Engineered Carbon Dots from a Traditional Herb Pair Orchestrate Concurrent Antioxidant and AP-1-Mediated Inflammation to Attenuate Renal Ischemia-Reperfusion Injury为题发表在Advanced Science上。

水热法制备三种碳点:AM@CDs、AS@CDs、AM-AS@CDs,DLS粒径分别为4.4、3.4、4.1 nm;晶格间距0.21 nm。复合碳点缺陷度更高,ID/IG=1.48,远高于单药碳点(0.58/0.78);Zeta电位-20~-25 mV,胶体稳定性优异。

AM-AS@CDs元素占比:C 66.41%、N 7.55%、O 26.04%,氮氧掺杂量显著高于单药碳点;独有石墨氮构型,C-C/C-N、C=O官能团含量分别提升1.8倍、1.5倍,丰富活性位点。

AM-AS@CDs比活性达10793 U/mg,是单药碳点的1.7倍;无羟基自由基生成,无氧化毒副作用。1:1为最优药料配比;表面氨基、羧基、羟基协同作用,共同调控类SOD活性。高氮掺杂+高密度缺陷,构筑优异抗氧化结构基础

无明显细胞毒性;相较单药碳点及临床抗氧化剂NAC,AM-AS@CDs可显著清除细胞内ROS,大幅抑制H₂O₂诱导的肾小管上皮细胞凋亡,在多种肾细胞中均具备稳定保护效果

动物AKI模型中,AM-AS@CDs显著下调CRE、BUN及肾损伤基因Kim-1、Lcn2,减轻肾小管空泡变性、刷状缘脱落病理损伤。材料注射2 h肾脏富集,缺血损伤肾脏富集量更高,生物相容性优异,无脏器毒性。

AM-AS@CDs显著降低外周血及肾脏内中性粒细胞、巨噬细胞浸润;下调Ccl2、Ccl7、Ccl20、Cxcl1趋化因子,抑制NF-κB通路,阻断炎症级联放大

转录组显示I/R模型存在1455个上调、1271个下调基因;AM-AS@CDs可重置氧化平衡,恢复Nrf2/HO-1通路稳态,上调SOD、GPX4等内源抗氧化基因表达。

筛选得到328个差异交集基因,富集白细胞迁移、细胞因子互作通路;材料下调Fosl1、c-Jun转录与磷酸化水平,抑制AP-1复合物活化,阻断趋化因子表达,抑制炎症浸润

总   结

基于中药配伍理念合成的AM-AS@CDs,凭借高缺陷、高杂原子掺杂结构实现优异类SOD活性;通过清除ROS+稳定内源抗氧化系统+阻断AP-1炎症轴双重机制,靶向改善肾脏I/R损伤,为中药衍生纳米酶治疗急性肾损伤提供全新研发思路。

相关文献

Bixiao Liu, Fuying Zhu, Zhuqing Wang, Jiawen Chen, Xiaomiao Cui, Congzhong Yang, Yao Peng, Dengyuan Feng, Li Lu, Hui Wei, Xiaozhi Zhao. Engineered Carbon Dots from a Traditional Herb Pair Orchestrate Concurrent Antioxidant and AP-1-Mediated Inflammation to Attenuate Renal Ischemia-Reperfusion Injury. Advanced Science (2026): e75596. 
https://doi.org/10.1002/advs.75596

讯作者简介

赵晓智

教授,医学博士,毕业于南京大学医学院,现任南京大学医学院附属鼓楼医院男科行政主任,教育处处长,南京大学博士研究生导师,曾到哈佛大学医学院移植研究中心进行访问交流。
主持国家自然基金项目3项,中国博士后基金2项,获江苏省“333”人才项目、江苏省科教强卫工程青年人才项目、江苏省六大高峰人才项目、南京卫生科技发展杰出青年基金项目支持。
获江苏省科技进步三等奖、江苏医学科技奖三等奖、江苏省医学新技术引进二等奖,南京市医学新技术奖一等奖和南京市科技进步奖三等奖各1项。
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  1. CONNECT:[ UseTime:0.000692s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000939s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000371s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000314s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000490s ]
  6. SELECT * FROM `set` [ RunTime:0.000236s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000708s ]
  8. SELECT * FROM `article` WHERE `id` = 565804 LIMIT 1 [ RunTime:0.000718s ]
  9. UPDATE `article` SET `lasttime` = 1780374380 WHERE `id` = 565804 [ RunTime:0.005117s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000299s ]
  11. SELECT * FROM `article` WHERE `id` < 565804 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000544s ]
  12. SELECT * FROM `article` WHERE `id` > 565804 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000436s ]
  13. SELECT * FROM `article` WHERE `id` < 565804 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000999s ]
  14. SELECT * FROM `article` WHERE `id` < 565804 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.004359s ]
  15. SELECT * FROM `article` WHERE `id` < 565804 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001777s ]
0.092114s