Systemic gene transfer to skeletal muscle using reengineered AAV vectors

Area of Science:

• Biomedical Engineering
• Molecular Biology
• Gene Therapy

Background:

• Musculoskeletal disorders necessitate efficient gene delivery to diverse muscle groups.
• Adeno-associated viral (AAV) vectors are promising for muscle-targeted gene therapy.
• Systemic administration of AAV vectors requires tissue-specific tropism for efficacy.

Purpose of the Study:

• To present novel, lab-derived adeno-associated viral (AAV) vectors engineered for enhanced muscle tropism.
• To demonstrate the systemic tissue tropism of these reengineered AAV vectors in a preclinical mouse model.
• To detail methodologies for assessing gene transfer efficiency in skeletal muscle following AAV vector administration.

Main Methods:

• Engineering and characterization of novel adeno-associated viral (AAV) vectors.
• Evaluation of systemic tissue tropism in mouse models.
• Assessment of gene transfer efficiency via intravenous and isolated limb infusion of AAV vectors.

Main Results:

• Several lab-derived AAV vectors exhibited systemic tropism in mice.
• Demonstrated potential for selective transduction of muscle tissue.
• Established methods for quantifying gene transfer efficiency in skeletal muscle.

Conclusions:

• Reengineered AAV vectors show promise for systemic gene therapy of musculoskeletal disorders.
• These vectors facilitate efficient gene transfer to a wide range of muscle groups.
• The study provides valuable methods for evaluating AAV-mediated gene delivery in muscle tissue.