Protocol for producing an adeno-associated virus vector by controlling capsid expression timing.

Area of Science:

• Molecular Biology
• Virology
• Gene Therapy

Background:

• Conventional adeno-associated virus (AAV) production methods yield numerous empty capsids, necessitating their removal for safe clinical application.
• High levels of empty capsids can reduce the efficacy and increase the immunogenicity of AAV-based therapeutics.

Purpose of the Study:

• To develop and present a refined protocol for efficient adeno-associated virus (AAV) vector production.
• To minimize the generation of empty AAV capsids during the production process.

Main Methods:

• Separation of replicase and capsid genes from the production plasmid.
• Controlled regulation of capsid gene expression.
• Synchronization of capsid expression with AAV vector genome replication.

Main Results:

• The protocol enables efficient production of AAV vectors with a reduced proportion of empty capsids.
• The method is adaptable for producing various AAV serotypes.
• Achieved efficient AAV vector genome replication prior to capsid protein expression.

Conclusions:

• The presented protocol offers an effective strategy for producing clinical-grade AAV vectors.
• This method addresses the critical issue of empty capsid contamination in AAV production.
• The protocol facilitates the development of safer and more effective gene therapies using AAV vectors.