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Related Experiment Video

Updated: Apr 24, 2026

Isolation of Next-Generation Gene Therapy Vectors through Engineering, Barcoding, and Screening of Adeno-Associated Virus AAV Capsid Variants
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Selecting Novel Retino-tropic AAV Capsids by Directed Evolution.

Adrian Westhaus1,2, Leszek Lisowski3,4,5

  • 1Translational Vectorology Research Unit, Children's Medical Research Institute, Faculty of Medicine and Health, The University of Sydney, Westmead, NSW, Australia.

Methods in Molecular Biology (Clifton, N.J.)
|April 22, 2026
PubMed
Summary
This summary is machine-generated.

This study details a comprehensive protocol for generating adeno-associated virus (AAV) libraries and selecting functional variants for gene therapy applications. The methods enable efficient AAV bioengineering for improved retinal transduction.

Keywords:
AAVCapsid library selectionDirected evolutionGene therapyViral vector production

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Area of Science:

  • Molecular Biology
  • Gene Therapy
  • Biotechnology

Background:

  • Adeno-associated virus (AAV) vectors are crucial for gene therapy, particularly for retinal transduction.
  • Existing methods lack a complete, published protocol for directed evolution of AAV variants.
  • A detailed protocol is needed to guide library generation and selection of high-performing AAV candidates.

Purpose of the Study:

  • To provide a comprehensive, step-by-step protocol for generating AAV variant libraries.
  • To describe a transgene expression-driven selection platform for recovering functional AAV candidates.
  • To enable researchers to engineer novel AAV variants for enhanced gene delivery applications.

Main Methods:

  • Generation of a peptide insertion library into the AAV2 capsid's variable region VIII.
  • Utilizing a highly predictive transgene expression-driven selection platform for candidate recovery.
  • Adaptable protocol applicable to various AAV serotypes and surface loops, independent of model systems.

Main Results:

  • The protocol facilitates the creation of diverse AAV libraries.
  • The selection platform effectively identifies functional AAV variants with improved transduction capabilities.
  • The described methods are accessible and do not require specialized equipment.

Conclusions:

  • This detailed protocol empowers researchers in AAV bioengineering and gene therapy.
  • The methods support the development of novel AAV variants for enhanced retinal gene delivery.
  • The protocol is a valuable resource for advancing AAV-based therapeutic strategies.