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Updated: Jan 28, 2026
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Surgical Method for Virally Mediated Gene Delivery to the Mouse Inner Ear through the Round Window Membrane
Published on: March 16, 2015
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AAV-Mediated Gene Delivery to the Inner Ear
1Department of Otolaryngology-Head and Neck Surgery, University of California San Francisco, San Francisco, CA, USA.
Methods in Molecular Biology (Clifton, N.J.)
|February 21, 2019
Summary
Cochlear gene therapy shows promise for congenital hearing loss. A new method delivers genes to the inner ear via the round window membrane, restoring hearing in a mouse model.
Area of Science:
- Otolaryngology
- Genetics
- Regenerative Medicine
Background:
- Congenital hearing loss affects millions globally.
- Gene therapy offers a potential treatment for genetic forms of deafness.
- Adeno-associated virus (AAV) vectors are promising for inner ear gene delivery.
Purpose of the Study:
- To describe a minimally invasive surgical technique for gene delivery to the cochlea.
- To evaluate the efficacy of this technique in restoring hearing in a mouse model of congenital deafness.
Main Methods:
- A trans-bulla round window membrane (RWM) approach was used for viral vector delivery.
- Adeno-associated virus (AAV) carrying the VGLUT3 gene was delivered to the cochlear scala tympani.
- Hearing restoration was assessed in VGLUT3 knockout mice.
Main Results:
- The described surgical method resulted in negligible damage to middle and inner ear structures.
- Successful hearing restoration was achieved in VGLUT3 knockout mice following gene therapy.
- This demonstrates the potential of AAV-mediated gene therapy for congenital deafness.
Conclusions:
- The trans-bulla RWM delivery method is a safe and effective approach for cochlear gene therapy.
- This technique holds significant promise for future clinical applications in treating genetic hearing loss.
- Further research is warranted to optimize delivery and assess long-term efficacy.
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