高等学校化学学报 ›› 2026, Vol. 47 ›› Issue (9): 20260027.doi: 10.7503/cjcu20260027

• 物理化学 • 上一篇    下一篇

基于铁掺杂红色碳点和滚环扩增技术构建的靶向药物递送DNA纳米组装体

宁淦, 庄晶云, 张如燕, 丁可欣, 周亭, 王秀凤, 王芳, 张志庆()   

  1. 中国石油大学(华东) 化学化工学院,青岛 266580
  • 收稿日期:2026-01-12 出版日期:2026-09-10 发布日期:2026-04-01
  • 通讯作者: 张志庆 E-mail:zhangzq@upc.edu.cn
  • 基金资助:
    山东省自然科学基金(ZR2022MB148, ZR2023MB148);山东省优质教育教学资源项目(SDYAL2024044);中国石油大学(华东)教改项目(YJG2023023)

Iron-doped Red Carbon Dot and Rolling Circle Amplification-mediated DNA Nano-assemblies for Targeted Drug Delivery

NING Gan, ZHUANG Jingyun, ZHANG Ruyan, DING Kexin, ZHOU Ting, WANG Xiufeng, WANG Fang, ZHANG Zhiqing()   

  1. College of Chemistry and Chemical Engineering,China University of Petroleum(East China),Qingdao 266580,China
  • Received:2026-01-12 Online:2026-09-10 Published:2026-04-01
  • Contact: ZHANG Zhiqing E-mail:zhangzq@upc.edu.cn
  • Supported by:
    the Natural Science Foundation of Shandong Province, China(ZR2022MB148, ZR2023MB148);the Graduate Education Reform Project of Shandong province, China(SDYAL2024044);the Graduate Education Reform Project of China University of Petroleum (East China), China(YJG2023023)

摘要:

以滚环扩增(RCA)产生的长单链脱氧核糖核酸(DNA)为支架, 开发了一种基于RCA的组装技术. 将该支架与具有不同功能的短链组装成多价适配体, 再与铁掺杂的红色碳点(Fe-CDs)结合, 构建了多价适配体核酸组装体-Fe-CDs-阿霉素(AFD)纳米平台, 用于精准的联合癌症治疗. 在AFD纳米平台中, MUC1适配体能够发挥高效的靶向能力, 在精准作用于癌细胞的同时减少对正常细胞的伤害. Fe-CDs具有类过氧化物酶活性, 可将过氧化氢催化分解为羟基自由基, 从而实现化学动力学治疗. 此外, AFD通过其中丰富的CG碱基对能够高效负载阿霉素(DOX). 当多价适配体凭借高效的靶向性进入癌细胞后, 会释放负载的Fe-CDs和DOX, 实现对癌细胞的有效杀灭.

关键词: 滚环扩增, 碳点, 多价适配体, 药物递送, 癌症治疗

Abstract:

A rolling circle amplification(RCA)-based assembly technique was proposed, which utilized the long single-stranded DNA produced by RCA as a scaffold. This scaffold was assembled with functional short strands into multivalent aptamers and subsequently combined with iron-doped red carbon dots(Fe-CDs) to construct a multivalent aptamer-based nanoplatform, termed assembly-Fe-CDs-doxorubicin(AFD), for precision combination cancer therapy. In the AFD nanoplatform, the MUC1 aptamer exerted efficient targeting capabilities, precisely acting on cancer cells while minimizing collateral damage to normal cells. The Fe-CDs possessed peroxidase-like activity, which catalyzed the decomposition of hydrogen peroxide(H2O2) into hydroxyl radicals(·OH), thereby achieving chemodynamic therapy(CDT). Furthermore, the abundant CG base pairs within the AFD structure enabled the high-efficiency loading of doxorubicin (DOX). Upon entering cancer cells via highly efficient targeting, the multivalent aptamers released the encapsulated Fe-CDs and DOX, facilitating the effective eradication of cancer cells. In summary, this multivalent aptamer nanoplatform based on DNA and Fe-CDs provided a promising and highly selective approach for enhancing the efficacy of cancer treatment.

Key words: Rolling circle amplification, Carbon dot, Polyvalent aptamer, Drug delivery, Cancer therapy

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