Surgical Method for Virally Mediated Gene Delivery to the Mouse Inner Ear through the Round Window Membrane

Overview

This article describes a post-auricular surgical approach for direct delivery of virus into the mouse cochlear scala tympani. The method minimizes blood loss and animal mortality, facilitating cochlear therapy through the round window membrane.

Key Study Components

Area of Science

• Neuroscience
• Otolaryngology
• Gene Therapy

Background

• The cochlea is critical for hearing.
• Direct delivery methods can enhance therapeutic efficacy.
• Minimizing trauma is essential for animal welfare.
• Previous methods may not effectively target the cochlea.

Purpose of Study

• To establish a reliable surgical technique for cochlear access.
• To facilitate viral delivery for gene therapy in postnatal mice.
• To assess the impact on hearing recovery and transgene expression.

Methods Used

• Exposure of the tympanic bulla.
• Perforation of the tissue to visualize the round window membrane.
• Puncturing the round window membrane for virus injection.
• Sealing the puncture site post-injection.

Main Results

• Successful delivery of virus into the cochlea.
• Assessment of transgene protein expression via immunofluorescent microscopy.
• Measurement of auditory brainstem response to evaluate hearing recovery.
• Demonstrated minimal blood loss and low mortality rates.

Conclusions

• The post-auricular approach is effective for cochlear therapy.
• This method can be utilized for various therapeutic agents.
• Future studies may expand on the applications of this technique.

Frequently Asked Questions