Dual-Functional Supernanoparticles with Microwave Dynamic Therapy and Microwave Thermal Therapy

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Oncology

Background:

• Photodynamic therapy (PDT) uses photoactivated sensitizers to generate cytotoxic reactive oxygen species (ROS) for tumor treatment.
• A major limitation of PDT is the poor light penetration depth, restricting its clinical application.
• Microwaves (MWs) offer deep tissue penetration but lack sufficient energy for direct ROS generation.

Purpose of the Study:

• To investigate the potential of liquid metal (LM) nanoparticles activated by MW irradiation for ROS generation.
• To develop dual-functional nanoparticles for combined microwave-activated dynamic and thermal tumor therapy.
• To overcome the limitations of light penetration in traditional photodynamic therapy.

Main Methods:

• Development of dual-functional nanoparticles by loading LMs and an MW heating sensitizer ionic liquid (IL) into mesoporous ZrO2 nanoparticles.
• Activation of nanoparticles using MW irradiation as the sole energy source.
• Evaluation of ROS generation (·OH and ·O2) and combined therapeutic effects.

Main Results:

• MW irradiation of LM supernanoparticles successfully generated ROS, including hydroxyl radicals (·OH) and superoxide radicals (·O2).
• The designed dual-functional nanoparticles, loaded with LMs and an MW sensitizer IL within ZrO2, were effectively activated by MWs.
• This MW-activated system demonstrated potential for concomitant dynamic and thermal therapy.

Conclusions:

• Liquid metal nanoparticles can be activated by microwaves to generate ROS, offering a new avenue for tumor therapy.
• Dual-functional nanoparticles loaded with LMs and an MW sensitizer provide a novel platform for MW-only activated combined dynamic and thermal therapy.
• This microwave-based approach presents a promising alternative to overcome the penetration depth limitations of photodynamic therapy.