应用化学 ›› 2024, Vol. 41 ›› Issue (1): 164-174.DOI: 10.19894/j.issn.1000-0518.230263

• 研究论文 • 上一篇    

基于microRNA‑21响应的Zn2+/DNA自组装体用于肿瘤的检测和氧化应激治疗

徐昕, 李烨, 王敏, 傅章程, 齐国敏(), 卢春华()   

  1. 福州大学化学学院,福州 350116
  • 收稿日期:2023-08-30 接受日期:2023-11-18 出版日期:2024-01-01 发布日期:2024-01-30
  • 通讯作者: 齐国敏,卢春华
  • 基金资助:
    国家重点研发计划(2018YFA0902600);国家自然科学基金(22174019);福建省自然科学基金(2020J06036)

Self‑Assembled MicroRNA‑21 Responsive Zn2+/DNA Nanoparticles for Tumor Fluorescence Imaging and Oxidative Stress Therapy

Xin XU, Ye LI, Min WANG, Zhang-Cheng FU, Guo-Min QI(), Chun-Hua LU()   

  1. College of Chemistry,Fuzhou University,Fuzhou 350116,China
  • Received:2023-08-30 Accepted:2023-11-18 Published:2024-01-01 Online:2024-01-30
  • Contact: Guo-Min QI,Chun-Hua LU
  • About author:chunhualu@fzu.edu.cn
    961043190@qq.com
  • Supported by:
    the National Key R&D Program of China(2018YFA0902600);the National Natural Science Foundation of China(22174019);the Natural Science Foundation of Fujian(2020J06036)

摘要:

DNA材料具有的特异性、可编程性和生物相容性,使得其在生物检测和药物递送方面具有很大的应用优势。 为了进一步拓展DNA材料的应用和合成方法,本文报道了利用DNA与金属离子之间的配合作用,简单高效地制备具有肿瘤标志物microRNA-21(miR-21)响应性的Zn2+/DNA自组装纳米粒子(ZDNPs)。 通过粒子中DNA发卡结构与miR-21的特异性互补,激活荧光信号并释放Zn2+,导致细胞内产生大量活性氧,从而用于肿瘤的荧光成像和氧化应激治疗。 合成的ZDNPs为形状均匀的球形粒子,能有效对Zn2+进行装载。 通过ZDNPs对miR-21的响应性实验,验证了ZDNPs与miR-21浓度之间具有良好的线性响应荧光信号,线性响应范围在5~160 nmol/L,检测限为5 nmol/L,且具备特异性。 此外,本文对ZDNPs在细胞内的作用效果也进行了研究,结果表明其能在肿瘤细胞内进行响应性的荧光成像,并能通过氧化应激途径介导肿瘤细胞凋亡。 在活体的荧光成像和肿瘤治疗中,ZDNPs在肿瘤病灶部位体现出特异性和持续性的示踪能力,并且对肿瘤产生了明显的生长抑制效果。

关键词: DNA发卡, 锌离子, microRNA-21, 肿瘤成像, 氧化应激治疗

Abstract:

The specificity, programmability and biocompatibility of DNA materials make them advantageous for applications in bio-detection and drug delivery. To further expand the applications and synthesis methods of DNA materials, in this study, Zn2+/DNA self-assembled nanoparticles (ZDNPs) with tumor-responsive marker microRNA-21 (miR-21) are simply and efficiently synthesized by utilizing the cooperative interaction between DNA and metal ions. Through the specific complementarity of the DNA hairpin structure in ZDNPs with miR-21, the fluorescent signal is activated and Zn2+ is released, which result in intracellular ROS production and can be used for fluorescence imaging and oxidative stress therapy of tumor. The synthesized ZDNPs are uniformly shaped spherical particles that can effectively load Zn2+. Depending on the responsive experiment of ZDNPs to miR-21, it is verified that there is a good linear fluorescence response signal with specificity between ZDNPs and miR-21 concentration. The linear response range is 5~160 nmol/L, and the detection limit is 5 nmol/L. The intracellular effects of ZDNPs are also investigated, and the results show that they can perform responsive fluorescence imaging, and mediate apoptosis of tumor cells through the oxidative stress pathway. As for in vivo fluorescence imaging and tumor therapy, ZDNPs demonstrate specific and sustained tracing ability at tumor lesion sites and produce significant growth inhibition effects on tumor.

Key words: DNA hairpin, Zinc ion, microRNA-21, Tumor imaging, Oxidative stress therapy

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