A Neutrophil-Inspired Supramolecular Nanogel for Magnetocaloric–Enzymatic Tandem Therapy

Qi Zhang, Jiaojiao Wu, Jingjing Wang, Xia Wang, Chu Wu, Mengwei Chen, Qing Wu, Maciej S. Lesniak, Yongli Mi, Yu Cheng*, Qigang Wang

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

Neutrophils can responsively release reactive oxygen species (ROS) to actively combat infections by exogenous stimulus and cascade enzyme catalyzed bio-oxidation. A supramolecular nanogel is now used as an artificial neutrophil by enzymatic interfacial self-assembly of peptides (Fmoc-Tyr(H2PO3)-OH) with magnetic nanoparticles (MNPs) and electrostatic loading of chloroperoxidase (CPO). The MNPs within the nanogel can elevate H2O2 levels in cancer cells under programmed alternating magnetic field (AMF) similar to the neutrophil activator, and the loaded CPO within protective peptides nanolayer converts the H2O2 into singlet oxygen (1O2) in a sustained manner for neutrophil-inspired tumor therapy. As a proof of concept study, both the H2O2 and 1O2 in cancer cells increase stepwise under a programmed alternating magnetic field. An active enzyme dynamic therapy by magnetically stimulated oxygen stress and sustained enzyme bio-oxidation is thus shown with studies on both cells and animals.

Original languageEnglish (US)
Pages (from-to)3732-3738
Number of pages7
JournalAngewandte Chemie - International Edition
Volume59
Issue number9
DOIs
StatePublished - Feb 24 2020

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Keywords

  • bio-oxidation
  • cancer therapy
  • nanogels
  • reactive oxygen species
  • self-assembly

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

Cite this

Zhang, Q., Wu, J., Wang, J., Wang, X., Wu, C., Chen, M., Wu, Q., Lesniak, M. S., Mi, Y., Cheng, Y., & Wang, Q. (2020). A Neutrophil-Inspired Supramolecular Nanogel for Magnetocaloric–Enzymatic Tandem Therapy. Angewandte Chemie - International Edition, 59(9), 3732-3738. https://doi.org/10.1002/anie.201915118