Iron-silver-modified quantum dots act as efficient catalysts in anti-cancer multitherapy through controlled,...

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Oncology

Background:

• Chemodynamic therapy (CDT) and sonodynamic therapy (SDT) show promise for cancer treatment.
• Limitations include the need for effective sonosensitizers and controlled CDT.

Purpose of the Study:

• To develop a novel nano-platform for combined CDT, SDT, and immunotherapy.
• To engineer silver-doped zinc selenide quantum dots with atomically dispersed iron for enhanced tumor targeting and therapeutic efficacy.

Main Methods:

• Synthesis of silver-doped zinc selenide quantum dots with superficial atomically dispersed iron.
• Surface modification with self-assembling peptides for tumor accumulation.
• Ultrasound stimulation to control iron valence switching and reactive oxygen species generation.

Main Results:

• The nano-platform demonstrated efficient sonosensitization, catalyzing CDT and SDT.
• Ultrasound triggered iron valence change, ameliorating tumor hypoxia and producing hydroxyl radicals.
• Silver doping enhanced singlet oxygen production, while selenium promoted immune responses against tumor metastasis.

Conclusions:

• The developed nano-platform offers controlled valence switching of catalysts for synergistic CDT, SDT, and immunotherapy.
• This approach represents a significant advancement in multimodal cancer treatment strategies.
• The system effectively targets tumors, enhances therapeutic outcomes, and stimulates systemic anti-tumor immunity.