应用化学 ›› 2026, Vol. 43 ›› Issue (2): 195-207.DOI: 10.19894/j.issn.1000-0518.250378

• 研究论文 • 上一篇    下一篇

氢键有机框架纳米酶的制备及其靶向抗菌应用

陈礼1,2, 赵传奇1,2()   

  1. 1.中国科学院长春应用化学研究所,化学前沿交叉实验室,长春 130022
    2.中国科学技术大学应用化学与工程学院,合肥 230026
  • 收稿日期:2025-10-03 接受日期:2025-12-01 出版日期:2026-02-01 发布日期:2026-03-06
  • 通讯作者: 赵传奇
  • 基金资助:
    吉林省自然科学基金(20210101130JC);国家自然科学基金(22377120);国家自然科学基金(22122704);国家自然科学基金(22437006);国家自然科学基金(22237006);国家自然科学基金(T2495262);国家重点研发计划(2022YFA1205804);国家重点研发计划(2019YFA0709202);国家重点研发计划(2021YFF1200700)

Synthesis of Hydrogen-Bonded Organic Framework Nanoenzyme for Targeting Antibacterial Applications

Li CHEN1,2, Chuan-Qi ZHAO1,2()   

  1. 1.Interdisciplinary Laboratory for Frontier Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China
    2.School of Applied Chemistry and Engineering,University of Science and Technology of China,Hefei 230026,China
  • Received:2025-10-03 Accepted:2025-12-01 Published:2026-02-01 Online:2026-03-06
  • Contact: Chuan-Qi ZHAO
  • About author:zhaocq@ciac.ac.cn
  • Supported by:
    Jilin Provincial Natural Science Foundation(20210101130JC);the National Nature Science Foundation of China(22377120);the National Key R&D Program of China(2022YFA1205804)

摘要:

本文构建了一种选择性治疗的氢键有机框架纳米酶(Pro@HOF@apt-Cu): 通过常规法合成了具有过氧化物酶活性的铁卟啉氢键有机框架(FeTCPP-HOF),并在其表面修饰了通过DNA模板原位生长约5 nm的铜纳米颗粒(CuNPs)和靶向革兰氏阴性菌脂多糖(LPS)的核酸适配体。 FeTCPP-HOF表现出优异的类过氧化物酶(POD)活性,不仅能在感染部位高H2O2环境中通过催化产生高毒性羟基自由基(·OH)破坏细菌细胞膜,还可将CuNPs表面的Cu(0)氧化为Cu(Ⅰ),增强生物正交催化效率。 适配体介导的主动靶向使Pro@HOF@apt-Cu对LPS的识别显著强于非靶向组,抗菌效果有效提升。 此外,HOF固有的孔道结构实现了前药的有效负载与原位激活,降低了脱靶毒性并增强治疗效果。 更重要的是,Pro@HOF@apt-Cu处理7 d能够有效清除小鼠植入导管及伤口的生物膜,并促进伤口愈合。 该协同治疗策略为革兰氏阴性菌感染提供了一种新的治疗方案。

关键词: 氢键有机框架, 生物正交, 纳米酶, 抗菌应用

Abstract:

Bacterial infection poses a significant hazard to public health and life. Antibiotic therapy can readily result in multidrug resistance. Despite significant efforts to enhance the effectiveness of current antibiotics or create new ones, bacteria's innate capacity to develop resistance has outpaced the rate of antibiotic development. This suggests that attempts to create sustainable antimicrobial treatments are ultimately destined to be unsuccessful. Herein, a selective therapeutic HOFzyme (Pro@HOF@apt-Cu) based on DNA-templated ultrasmall CuNPs grafted on peroxidase-mimicking FeTCPP-based HOF targeting lipopolysaccharide (LPS) is presented. FeTCPP-based HOF exhibit excellent POD-like activity, being not only able to catalyze the generation of more toxic hydroxyl radicals from H2O2 in the infection-rich microenvironment to disrupt the bacterial periplasm, but also able to oxidize surface Cu(0) to Cu(Ⅰ), thus boosting the bioorthogonal catalytic activity. The conjugation of the HOF with aptamer allows for active targeting of LPS on the surface of gram-negative bacteria. The antibacterial action of these HOFzymes is observably more significant than non-targeted treatment. Moreover, the inherent pores of HOF facilitated the loading of prodrugs, which realized effective drug delivery and in situ synthesis, greatly reduced off-target toxicity and enhanced therapeutic effects. Overall, this synergistic therapeutic strategy shows promising potential as a future treatment for infections caused by gram-negative bacteria.

Key words: Hydrogen-bonded organic framework, Bioorthogonal, Nanozyme, Antibacterial applications

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