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Area of Science:

  • Biomedical Engineering
  • Nanotechnology
  • Oncology

Background:

  • Iron-gallic acid chelate nanoparticles (Fe-GA NPs) show promise as Fenton catalysts and drug carriers.
  • Tumor microenvironment (TME) limitations like low pH and H2O2 hinder Fe-GA NP efficacy.
  • Developing strategies to overcome TME constraints is crucial for enhanced cancer therapy.

Purpose of the Study:

  • To engineer an ATP-responsive core-shell nanoarchitecture (GOx@Fe-GA) for improved cancer therapy.
  • To create a system that overcomes TME limitations and enhances therapeutic outcomes.
  • To investigate the synergistic effects of ROS generation, metabolic starvation, and photothermal therapy.

Main Methods:

  • Integration of glucose oxidase (GOx) with Fe-GA coordination networks into a core-shell nanostructure.
  • Utilizing tumor-specific elevated ATP concentrations to trigger nanosystem disassembly.
  • Employing near-infrared (NIR) irradiation for photothermal therapy and assessing in vitro and in vivo efficacy.

Main Results:

  • The GOx@Fe-GA nanosystem disassembled in response to ATP, releasing GOx.
  • Released GOx depleted glucose, generated H2O2, and acidified the TME, optimizing Fenton reactions.
  • Combined ROS generation, metabolic starvation, and photothermal sensitization (disrupting HSP70) led to potent tumor suppression with low systemic toxicity.

Conclusions:

  • GOx@Fe-GA represents a self-enhancing therapeutic platform activated by tumor-specific ATP.
  • The system triggers a cascade of therapeutic effects, including ROS storm, metabolic deprivation, and photothermal sensitization.
  • This engineered nanoarchitecture offers a promising strategy for overcoming TME limitations in cancer treatment.