Microbubbles for Nucleic Acid Delivery in Liver Using Mild Sonoporation.

Area of Science:

• Biomedical Engineering
• Gene Therapy
• Molecular Biology

Background:

• Ultrasound-mediated gene delivery offers potential for enhanced gene transfer into deep tissues.
• Microbubbles, when complexed with genetic material, can facilitate gene delivery by disrupting cell membranes upon ultrasound exposure.
• Image-guided experimentation is possible, allowing for precise control over gene delivery parameters.

Purpose of the Study:

• To describe the preparation of positively charged microbubbles and antibiotic marker-free plasmids.
• To detail the combination of these components for ultrasound-mediated gene delivery.
• To evaluate ultrasound-mediated liver transfection efficiency and duration post-systemic administration in mice.

Main Methods:

• Preparation of positively charged microbubbles.
• Plasmid construction without antibiotic resistance markers.
• Systemic administration of microbubble-plasmid complexes in mice.
• Application of ultrasound for gene delivery to the liver.

Main Results:

• Successful preparation and combination of microbubbles and plasmids.
• Demonstrated ultrasound-mediated liver transfection following systemic administration.
• Achieved superior liver gene expression lasting over eight months after a single treatment.

Conclusions:

• Positively charged microbubbles complexed with antibiotic marker-free plasmids enable effective ultrasound-mediated liver gene delivery.
• This approach provides a promising strategy for long-term gene expression in deep tissues.
• The method allows for image-guided gene transfer with sustained therapeutic effects.