Nano-co-delivery Systems Combining Chemical and Photodynamic Therapy against Breast Cancer

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Oncology

Background:

• Combination therapy improves cancer treatment outcomes.
• Photodynamic therapy (PDT) and chemotherapy are key cancer treatment modalities.
• Developing effective drug delivery systems is crucial for enhancing therapeutic efficacy.

Purpose of the Study:

• To develop a Pluronic F127-based nano-codelivery system (FDC) for docetaxel (DTX) and chlorin e6 (Ce6).
• To evaluate the enhanced efficacy of combined PDT and chemotherapy using the FDC system in breast cancer treatment.

Main Methods:

• FDC preparation via thin film hydration method.
• Characterization of FDC particle size, PDI, zeta potential, drug loading, and stability.
• In vitro evaluation of cellular uptake, ROS generation, cytotoxicity, and apoptosis in 4T1 breast cancer cells under light irradiation.

Main Results:

• FDC exhibited optimal particle size (200.33 ± 7.71 nm), good PDI (0.392 ± 0.03), high drug loading, and 7-day stability.
• FDC significantly enhanced cellular uptake of Ce6 and increased ROS generation upon light irradiation.
• FDC plus light irradiation demonstrated superior anti-tumor effects compared to free drugs or physical mixtures.

Conclusions:

• The FDC nano-codelivery system effectively combines chemotherapy and photodynamic therapy.
• This system shows enhanced anti-tumor efficacy against breast cancer.
• FDC represents a promising strategy for advanced breast cancer treatment.