Combined Photothermal and Ionizing Radiation Sensitization of Triple-Negative Breast Cancer Using Triangular Silver...

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Oncology

Background:

• Ionizing radiation (IR) is a common triple-negative breast cancer (TNBC) treatment but causes off-target toxicity.
• Hyperthermia enhances IR efficacy but requires precise timing and localization.
• Current limitations hinder the clinical adoption of combined thermoradiation therapy.

Purpose of the Study:

• To evaluate a multimodal approach for selective TNBC treatment.
• To assess the efficacy of triangular silver nanoparticles (TAgNPs) in combined photothermal therapy and IR sensitization.

Main Methods:

• Utilized triangular silver nanoparticles (TAgNPs) with near-infrared (NIR) light absorption.
• Applied a combination of photothermal therapy, IR sensitization, and specific cytotoxicity.
• Tested selectivity on MDA-MB-231 TNBC cells versus non-malignant MCF-10A breast cells.

Main Results:

• TAgNP-mediated photothermal therapy and radiosensitization demonstrated high specificity for TNBC cells.
• Non-malignant mammary epithelial cells were spared from treatment effects.

Conclusions:

• Combined TAgNP photothermal therapy and radiosensitization offer a highly selective treatment for TNBC.
• This approach minimizes off-target effects on normal breast cells, crucial for breast conservation therapy and invasive margins.