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Author Spotlight: Efficient Adeno-Associated Virus Isolation for Pre-Clinical Applications
Published on: February 9, 2024
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Engineering a highly durable adeno-associated virus receptor for analytical applications
Kouhei Yoshida1,2, Yuji Tsunekawa1, Kento Kurihara2
1Division of Molecular and Medical Genetics, Center for Gene and Cell Therapy, The Institute of Medical Science, The University of Tokyo, 4-6-1, Shirokanedai, Minato-ku, Tokyo 108-8639, Japan.
Molecular Therapy. Methods & Clinical Development
|December 28, 2023
Summary
Researchers developed a novel affinity column using engineered Adeno-associated virus receptor (AAVR) for robust AAV vector quality control. This tool quantifies AAV-AAVR binding affinities, aiding gene therapy vector development and characterization.
Area of Science:
- Biotechnology
- Gene Therapy
- Virology
Background:
- Adeno-associated virus (AAV) is a key vector in gene therapy, with various serotypes engineered for specific tissue tropisms via capsid modification.
- The Adeno-associated virus receptor (AAVR) is crucial for the cellular entry of most therapeutic AAV serotypes.
- Quantifying AAV-AAVR binding is vital for ensuring the quality and efficacy of gene therapy vectors.
Purpose of the Study:
- To develop a reliable method for evaluating the binding interactions between AAV vectors and AAVR.
- To create a tool for quality control, titer determination, and purification of therapeutic AAV vectors.
- To facilitate the engineering of novel AAV vectors with improved properties.
Main Methods:
- Engineered a stable AAVR variant through mutagenesis, retaining binding activity and enhancing acid durability.
- Developed an affinity chromatography column utilizing the engineered AAVR.
- Employed the affinity column for repeated binding and dissociation measurements of various AAV serotypes with AAVR.
Main Results:
- The engineered AAVR demonstrated high stability in acidic conditions while maintaining AAV-binding capacity.
- The affinity column successfully enabled quantitative assessment of AAV-AAVR interactions across different serotypes.
- Observed diverse binding affinities between AAV serotypes and AAVR, correlating with vector infection efficiency.
Conclusions:
- The engineered AAVR affinity column provides a robust platform for AAV vector quality assessment and process development.
- This tool aids in quantifying capsid titers and performing affinity purification of AAV vectors.
- The column is valuable for understanding AAV tropism and for guiding future AAV vector capsid engineering efforts.
