A Multifunctional Polyester Nanoplatform for the Synergistic Anticancer: Enhanced Photodynamic Therapy and Targeted...

Area of Science:

• Biomaterials Science
• Nanotechnology
• Oncology

Background:

• Gene therapy (GT) faces challenges with lysosomal nucleic acid capture.
• Photodynamic therapy (PDT) is limited by tumor hypoxia.
• Developing integrated therapeutic strategies is crucial for effective cancer treatment.

Purpose of the Study:

• To design a versatile block polyester vector (BFN2) for combined gene therapy and photodynamic therapy.
• To address limitations of GT and PDT in solid tumors.
• To create a nanoplatform capable of oxygen delivery and nucleic acid condensation.

Main Methods:

• Synthesis of a block polyester vector (BFN2) incorporating a photosensitizer, oxygen carrier, and RNA-condensing moiety.
• Formation of hybrid nanoparticles (BFN2-DR/HIF-1α siRNA@O₂) with oxygen and siRNA.
• In vitro and in vivo evaluation of the nanoplatform's efficacy in 4T1 tumors.

Main Results:

• The BFN2-based nanoplatform effectively reversed tumor hypoxia and facilitated lysosomal escape of nucleic acids.
• Hybrid nanoparticles demonstrated significant tumor growth inhibition (TGI up to 87%) in 4T1 tumors.
• The integrated approach significantly boosted the combined efficacy of PDT and GT.

Conclusions:

• BFN2 represents a first-in-class block polymeric vector for multi-modality cancer therapy.
• This nanoplatform offers a novel strategy for overcoming therapeutic barriers in solid tumors.
• The developed approach provides a promising perspective for advanced oncological treatment paradigms.