ROS-Responsive Bola-Lipid Nanoparticles as a Codelivery System for Gene/Photodynamic Combination Therapy

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Cancer Therapy

Background:

• Nonviral delivery systems combining genes and photosensitizers are crucial for multimodal tumor gene/photodynamic therapy (PDT).
• Developing efficient carriers for simultaneous gene and photosensitizer delivery remains a challenge.

Purpose of the Study:

• To synthesize and evaluate ROS-sensitive cationic bola-lipids for gene and photosensitizer codelivery.
• To investigate the potential of a specific bola-lipid, 14-TDC, as a nanocarrier for combined p53 gene therapy and photodynamic therapy (PDT).

Main Methods:

• Synthesis of a series of ROS-sensitive cationic bola-lipids with varying hydrophobic chain lengths.
• Characterization of lipid nanoparticles (LNPs) for DNA condensation, photosensitizer (Ce6) loading, and gene transfection efficiency.
• In vitro evaluation of codelivery system efficacy in inhibiting tumor cell proliferation and inducing apoptosis.

Main Results:

• Bola-lipid 14-TDZn demonstrated superior DNA condensation, gene transfection, and cellular uptake.
• The resulting 14-TDC nanoparticles effectively codelivered p53 and Ce6 without compromising gene delivery efficiency.
• Codelivery of p53 and Ce6 via 14-TDC showed significantly enhanced inhibition of tumor cell proliferation and apoptosis induction compared to monotherapies.

Conclusions:

• 14-TDC nanoparticles are effective nanocarriers for the codelivery of genes and photosensitizers.
• The combination therapy exhibits synergistic effects, enhancing anti-tumor activity through ROS production and p53 pathway activation.
• 14-TDC holds promise as a nanocarrier for advanced gene/PDT combination cancer therapy.