Streamlined Adeno-Associated Virus Production Using Suspension HEK293T Cells.

Area of Science:

• Molecular Biology
• Biotechnology
• Gene Therapy

Background:

• Recombinant adeno-associated viruses (rAAVs) are crucial for gene therapy, but scalable production remains a challenge.
• Adherent cell cultures are common but difficult to scale, while suspension cells face transfection inefficiencies.

Purpose of the Study:

• To develop a simple, scalable protocol for rAAV production using suspension cells.
• To improve transfection efficiency in serum-free media for HEK293T suspension cells.

Main Methods:

• Utilized serum-free media-adapted HEK293T suspension cells for rAAV production.
• Employed the VirusGEN transfection reagent for efficient gene transfer.
• Purified rAAV using iodixanol density gradient centrifugation.

Main Results:

• Achieved rAAV production from transfection to quality analysis within two weeks.
• Obtained high vector yields (1-1.5 x 10^13 vg per 90 mL) comparable to adherent cell protocols.
• Demonstrated efficient transfection in suspension cells, overcoming a key production bottleneck.

Conclusions:

• The developed protocol offers a scalable and efficient method for rAAV production using suspension cells.
• This approach simplifies manufacturing processes for gene therapy applications.
• The protocol enables high-yield rAAV production in a shorter timeframe.