Development of Mesenchymal Stem Cell Membrane-Enveloped Nanovesicles for Enhanced Gene Delivery

Area of Science:

• Biotechnology
• Regenerative Medicine
• Gene Therapy

Background:

• Mesenchymal stem cell (MSC)-derived extracellular vesicles (EVs) show therapeutic potential.
• EVs can deliver therapeutic molecules, but DNA delivery via EVs is challenging.
• Adeno-associated virus (AAV)-containing EVs enable gene delivery but suffer from low yield and complex isolation.

Purpose of the Study:

• To develop an efficient and scalable method for gene delivery using engineered nanovesicles.
• To create MSC membrane-enveloped nanovesicles that mimic natural EVs for enhanced therapeutic cargo delivery.
• To improve upon existing EV-AAV production and isolation methods.

Main Methods:

• Engineered MSC membrane-enveloped nanovesicles using a size-defined extrusion method.
• Encapsulated recombinant AAV vectors carrying therapeutic gene sequences into the nanovesicles.
• Compared the gene delivery efficiency, yield, time, and cost with conventional AAVs and naturally secreted EV-AAVs.

Main Results:

• Developed ~200 nm nanovesicles mimicking natural EVs with encapsulated AAV vectors.
• Achieved improved gene delivery efficiency compared to conventional AAVs.
• Demonstrated significantly higher yields with reduced time and cost compared to naturally secreted EV-AAVs.

Conclusions:

• Presented a novel MSC-based membrane nanovesicle platform for efficient gene delivery.
• Combined EV-mimicking properties with AAV-mediated gene transfer for enhanced therapeutic potential.
• The platform offers enhanced delivery efficiency and production scalability, advancing gene therapy toward clinical translation.