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Single Atom Iron-Doped Graphic-Phase C

Guiying Feng1, Hui Huang2, Min Zhang1

  • 1Department of Ultrasonography, Hainan General Hospital/Hainan Affiliated Hospital of Hainan Medical University, 570311, Haikou, P. R. China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|June 7, 2023
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Summary
This summary is machine-generated.

Researchers developed novel iron-doped carbon nitride nanosheets as enhanced sonosensitizers for cancer therapy. This approach boosts reactive oxygen species generation for improved sonodynamic therapy (SDT) and chemodynamic therapy (CDT) effects.

Keywords:
carbon nitridechemoreactive medicinereactive oxygen speciessemiconductorsingle atom

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Area of Science:

  • Nanotechnology
  • Materials Science
  • Biomedical Engineering
  • Oncology

Background:

  • Sonodynamic therapy (SDT) offers non-invasive tumor treatment via reactive oxygen species (ROS) generation.
  • Clinical application of SDT is limited by the scarcity of effective sonosensitizers.
  • Developing advanced materials to enhance SDT efficacy is crucial for cancer therapy.

Purpose of the Study:

  • To engineer novel single atom iron (Fe)-doped graphitic-phase carbon nitride (C3N4) semiconductor nanosheets (Fe-C3N4 NSs) as high-performance sonosensitizers.
  • To investigate the synergistic sonodynamic and chemodynamic therapy (SDT/CDT) effects of Fe-C3N4 NSs against melanoma.
  • To explore the potential of single-atom doping strategies for improving semiconductor-based sonosensitizers.

Main Methods:

  • Synthesis and characterization of Fe-C3N4 NSs.
  • Ultrasound (US) activation to induce ROS generation.
  • Density functional theory (DFT) simulations to analyze charge redistribution and electronic properties.
  • In vitro and in vivo antitumor efficacy evaluations.

Main Results:

  • Fe-C3N4 NSs demonstrated efficient electron-hole pair separation, enhancing ROS production under US irradiation.
  • Single atom Fe doping promoted peroxidase-like activity, catalyzing Fenton reactions to generate hydroxyl radicals.
  • Synergistic sono-chemodynamic effects led to significant antitumor activity in both in vitro and in vivo models.
  • DFT simulations confirmed improved charge redistribution and synergistic therapeutic activities in Fe-C3N4 NSs.

Conclusions:

  • Fe-C3N4 NSs act as effective chemoreactive sonosensitizers, significantly augmenting antitumor effects via sono-chemodynamic therapy.
  • Single-atom doping is a promising strategy for developing advanced semiconductor-based sonosensitizers.
  • This work expands the application of inorganic semiconductor sonosensitizers in innovative anticancer therapies.