Hypoxia Alleviating PdTe Nanoenzymes for Thermoradiotherapy

Area of Science:

• Biomaterials Science
• Nanotechnology
• Cancer Therapy

Background:

• Tumor hypoxia is a major cause of radioresistance, reducing radiotherapy effectiveness.
• Developing strategies to alleviate tumor hypoxia is crucial for enhancing cancer treatment outcomes.
• High-Z element-based nanomaterials offer potential for combined therapeutic effects.

Purpose of the Study:

• To construct nanorod-shaped palladium telluride (PdTe) nanoenzymes.
• To investigate the potential of PdTe nanoenzymes in overcoming tumor hypoxia and enhancing thermoradiotherapy.
• To evaluate the biocompatibility and therapeutic efficacy of PdTe nanoenzymes.

Main Methods:

• Synthesis of nanorod-shaped PdTe nanoenzymes.
• In vitro and in vivo evaluation of oxygen generation capacity.
• Assessment of PdTe nanoenzyme-mediated photothermal therapy and radiosensitization.
• In vivo studies using MBT-2 cells and tumor-bearing mice.

Main Results:

• PdTe nanoenzymes demonstrated significant oxygen generation ability both in vitro and in vivo.
• High-Z elements (palladium and tellurium) in PdTe enhanced X-ray-induced DNA radical generation.
• PdTe nanoenzymes effectively alleviated tumor hypoxia and improved blood flow.
• Thermoradiotherapy combined with PdTe nanoenzymes showed enhanced tumor ablation and treatment efficiency.

Conclusions:

• PdTe nanoenzymes represent a novel approach to overcome tumor hypoxia.
• The developed nanoenzyme shows promise for enhancing the efficacy of thermoradiotherapy.
• PdTe nanoenzymes offer a potential strategy for improving cancer treatment outcomes.