Biodegradable nanoparticles-mediated targeted drug delivery achieves trans-spatial immunotherapy

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Cancer Immunotherapy

Background:

• Immunotherapy is hindered by poor antigen presentation and immunosuppressive tumor microenvironments (TME).
• Effective cancer treatment requires overcoming these challenges to stimulate a robust anti-tumor immune response.

Purpose of the Study:

• To develop multifunctional nanoparticles for targeted chemotherapy and trans-spatial immunotherapy.
• To enhance antigen presentation and overcome immunosuppression in triple-negative breast cancer.

Main Methods:

• Fabrication of biodegradable mesoporous silica nanoparticles incorporating carbon nanodots and TKD peptides.
• Loading hydrophobic drugs for chemotherapy and utilizing nanoparticle properties for antigen transport.
• Investigating nanoparticle-induced antigen release, adsorption, transport, and subsequent immune cell activation.

Main Results:

• Nanoparticles effectively delivered chemotherapy, killing tumor cells and releasing antigens.
• Biodegraded debris facilitated antigen adsorption and transport to the spleen via TKD peptide.
• Enhanced antigen processing and T-cell activation in the spleen, bypassing TME immunosuppression.

Conclusions:

• The developed nanoparticles synergize chemotherapy and immunotherapy for enhanced cancer treatment.
• Trans-spatial antigen presentation strategy effectively overcomes tumor-induced immunosuppression.
• This approach shows significant therapeutic potential for triple-negative breast cancer.