Novel liposomal formulation for targeted gene delivery

Area of Science:

• Nanomedicine
• Gene Therapy
• Biotechnology

Background:

• Targeted gene delivery requires efficient and stable vector systems.
• Current formulations often face challenges with DNA encapsulation and in vivo stability.
• Developing immunoliposomes with specific targeting moieties is crucial for precision medicine.

Purpose of the Study:

• To develop a polyethylene glycol (PEG)-stabilized immunoliposome (PSIL) formulation for intravenous administration.
• To achieve high DNA content within the PSILs for effective gene delivery.
• To ensure the PSIL formulation is suitable for targeted gene delivery in vivo.

Main Methods:

• Plasmid DNA was condensed and packaged into neutral PSILs.
• Monoclonal antibodies (MAbs) targeting the mouse transferrin receptor were conjugated to PEG maleimide moieties.
• Particle size was measured, and transfection capacity was assessed using mouse neuroblastoma cells.

Main Results:

• High DNA encapsulation (71%) and MAb conjugation (69%) efficiencies were achieved.
• PSILs maintained particle size (<100 nm) and showed no DNA leakage after 48h storage.
• In vivo half-life was 23.9h, and transfection was confirmed as transferrin receptor-dependent.

Conclusions:

• The developed PSIL formulation exhibits high DNA encapsulation efficiency.
• The formulation demonstrates vector-specific transient transfection capacity.
• These features indicate suitability for targeted gene therapy applications.