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Related Experiment Video

Updated: Jan 2, 2026

Production, Purification, and Quality Control for Adeno-associated Virus-based Vectors
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Selection of an Efficient AAV Vector for Robust CNS Transgene Expression.

Killian S Hanlon1,2,3, Jonah C Meltzer3,4, Tetyana Buzhdygan5,6,7

  • 1Department of Neurobiology, Harvard Medical School, Boston, MA 02115, USA.

Molecular Therapy. Methods & Clinical Development
|December 3, 2019
PubMed
Summary

Researchers developed a novel adeno-associated virus (AAV) capsid, AAV-F, that significantly enhances gene delivery to mouse brains. This improved AAV vector shows high efficiency in both neurons and astrocytes for potential central nervous system (CNS) therapies.

Keywords:
AAV capsid libraryAAV vectoradeno-associated virus vectorcentral nervous systemgene deliverygene therapytransduction efficiency

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Area of Science:

  • Molecular Biology
  • Virology
  • Neuroscience

Background:

  • Adeno-associated virus (AAV) vectors are crucial for gene therapy, with capsid engineering enhancing their delivery efficiency.
  • Developing AAV capsids with improved tropism for the central nervous system (CNS) is essential for treating neurological disorders.

Purpose of the Study:

  • To engineer and identify novel adeno-associated virus (AAV) capsids with enhanced gene delivery efficiency to the mouse brain.
  • To create a sensitive screening platform for identifying superior AAV capsid variants.

Main Methods:

  • Designed the iTransduce AAV library, integrating a peptide library with an AAV9 capsid and a Cre cassette for transgene expression detection.
  • Administered the library intravenously to transgenic mice with Cre-inducible fluorescent protein and performed fluorescence-activated cell sorting (FACS) on brain cells.
  • Utilized DNA sequencing to identify dominant capsid variants from sorted cells.

Main Results:

  • Two dominant AAV capsids were identified after two selection rounds.
  • The AAV-F capsid demonstrated a >65-fold increase in transgene expression in astrocytes and a >171-fold increase in neurons compared to parental AAV9 in the brain cortex.
  • High transduction efficiency was observed, independent of sex and consistent across C57BL/6 and BALB/c mouse strains.

Conclusions:

  • The AAV-F capsid represents a highly efficient vector for CNS gene transduction in mice.
  • AAV-F's robust performance suggests significant potential for future therapeutic applications in the central nervous system.
  • Further validation in large animal models is planned to assess the translational potential of AAV-F.