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Related Experiment Video

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Mannose-coupled AAV2: A second-generation AAV vector for increased retinal gene therapy efficiency.

Mathieu Mével1, Virginie Pichard1, Mohammed Bouzelha1

  • 1Nantes Université, CHU de Nantes, INSERM UMR 1089, TaRGeT-Translational Research in Gene Therapy Laboratory, 44200 Nantes, France.

Molecular Therapy. Methods & Clinical Development
|February 8, 2024
PubMed
Summary
This summary is machine-generated.

New adeno-associated virus (AAV) vectors enhance gene delivery to the retina. Modifying the AAV capsid with a mannose ligand improves transduction efficiency, offering a promising approach for treating inherited retinal diseases.

Keywords:
adeno-associated virusbioconjugationchemistrygene therapyretina

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Area of Science:

  • Ophthalmology
  • Gene Therapy
  • Molecular Biology

Background:

  • Inherited retinal diseases cause untreatable blindness.
  • Adeno-associated virus (AAV) vectors are promising for in vivo retinal gene therapy.
  • Current AAV vectors can elicit dose-related inflammatory responses in ocular gene therapy trials.

Purpose of the Study:

  • To develop novel recombinant adeno-associated virus (rAAV) vectors with enhanced efficacy for ophthalmic applications.
  • To improve the therapeutic index of AAV vectors by modifying their capsid.
  • To reduce potential inflammatory reactions associated with ocular gene therapy.

Main Methods:

  • Utilized bioconjugation chemistry to modify the rAAV capsid.
  • Covalently coupled a mannose ligand to AAV capsid amino groups via a thiourea bond.
  • Evaluated vector transduction efficiency in rat and nonhuman primate retinas.

Main Results:

  • The modified rAAV vectors demonstrated significantly increased transduction efficiency.
  • Mannose ligand coupling via thiourea bond enhanced vector performance in retinal tissues.
  • Optimization of AAV vectors shows potential for improved gene delivery.

Conclusions:

  • Developed novel rAAV vectors with enhanced retinal transduction efficiency.
  • Modified AAV capsids offer a strategy to improve therapeutic index for ocular gene therapy.
  • These optimized vectors hold promise for treating diverse retinal diseases.