Chem. J. Chinese Universities ›› 2026, Vol. 47 ›› Issue (9): 20260027.doi: 10.7503/cjcu20260027

• Physical Chemistry • Previous Articles     Next Articles

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)

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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