Chem. J. Chinese Universities ›› 2020, Vol. 41 ›› Issue (7): 1461.doi: 10.7503/cjcu20200242

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Multifunctional DNA Nanoflowers for Autophagy Inhibition and Enhanced Antitumor Chemotherapy

ZHANG Kaixiang1,2,LIU Junjie1,SONG Qiaoli1,WANG Danyu1,SHI Jinjin1,*(),ZHANG Haiyue3,*(),LI Jinghong2,*()   

  1. 1. Key laboratory of Targeting Therapy and Diagnosis for Critical Diseases, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, China
    2. Department of Chemistry, Tsinghua University, Beijing 100084, China
    3. College of Chemical and Life Science, Changchun University of Technology, Changchun 130012, China
  • Received:2020-04-29 Online:2020-07-10 Published:2020-06-02
  • Contact: Jinjin SHI,Haiyue ZHANG,Jinghong LI E-mail:shijinyxy@zzu.edu.cn;zhhaiyue@163.com;jhli@mail.tsinghua.edu.cn
  • Supported by:
    † National Natural Science Foundation of China(21904119);National Natural Science Foundation of China(21621003);Key Scientific Research Projects of Science and Technology Department of Henan Province, China(192102310147)

Abstract:

Autophagy is an important process in eukaryotic cells, in which subcellular membranes undergo dynamic morphological changes, leading to the degradation of cellular proteins and cytoplasmic organelles. High levels of cellular autophagy could protect tumor cells from apoptosis and reduce the antitumor effect of chemotherapy drugs. In this work, we designed a multifunctional DNA nanoflower, which encode DNA aptamer and DNAzyme for targeted drug delivery and gene silencing to inhibit autophagy in tumor cells. Using RT-PCR, we verified that the designed DNA nanoflower can effectively cleave the mRNA of autophagy-related gene(ATG5) in tumor cells. The cytotoxicity and cell apoptosis assay also showed that the synthesized multifunctional DNA nanoflower could enhance antitumor chemotherapy.

Key words: DNA nanoflowers, Drug delivery, Autophagy, DNAzyme, Antitumor chemotherapy

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