A cascaded enzyme-loaded Fe-hemoporfin framework for synergistic sonodynamic-starvation therapy of tumors

Nanoscale. 2021 Mar 21;13(11):5910-5920. doi: 10.1039/d0nr08508a. Epub 2021 Mar 16.

Abstract

Enzyme-loaded nanosystems with multimodal therapeutic functions have received increasing attention in the treatment of malignant tumors. Herein, we designed and prepared cascaded dual-enzyme-augmented Fe-hemoporfin framework nanosonosensitizers for synergistic sonodynamic-starvation therapy of tumors. Amorphous Fe-hemoporfin frameworks (FeHF) with an average size of ∼85 nm were synthesized by assembling the clinical drug hemoporfin with Fe3+ ions. Then, FeHF was used to load dual enzymes (glucose oxidase (GOx) and catalase (CAT)) and modified by PEGylated folic acid-conjugated lipids. The dual-enzyme loaded FeHF (FeHF-GOx/CAT) exhibited higher efficiency not only for glucose depletion but also for ultrasound (US)-triggered 1O2 generation than that of pure FeHF, resulting from the cascaded catalytic reaction from the dual-enzyme system. As observed by magnetic resonance imaging, the intravenously injected FeHF-GOx/CAT was accumulated within tumors. The FeHF-GOx/CAT + US exhibited the highest inhibition effect compared to the FeHF-CAT + US (only SDT) or FeHF-GOx/CAT (only starvation therapy), due to the synergistic effects of SDT and starvation therapy. Therefore, the cascaded dual-enzyme loading strategy can increase the SDT efficiency of FeHF, which may guide further works in the development of efficient nanosonosensitizers.

MeSH terms

  • Catalysis
  • Glucose Oxidase
  • Hematoporphyrins
  • Humans
  • Neoplasms* / diagnostic imaging
  • Neoplasms* / drug therapy

Substances

  • Hematoporphyrins
  • hematoporphyrin monomethyl ether
  • Glucose Oxidase