Role of Gene Mutations Predicted from a Computational Model of the Cochlea of the Inner Ear

author: Pavel Mistrík, Faculty of Biomedical and Life Sciences, University of Glasgow
published: April 16, 2009,   recorded: April 2009,   views: 3138


Related Open Educational Resources

Related content

Report a problem or upload files

If you have found a problem with this lecture or would like to send us extra material, articles, exercises, etc., please use our ticket system to describe your request and upload the data.
Enter your e-mail into the 'Cc' field, and we will keep you updated with your request's status.
Lecture popularity: You need to login to cast your vote.


The mutations in the GJB2 gene encoding for the connexin 26 (Cx26) protein are the most common source of nonsyndromic forms of deafness. Cx26 is a building block of gap junctions (GJ), establishing electrical intercellular connectivity between cells in distinct cochlear compartments. Cochlear circulation of ions such as potassium (K+) and metabolites such as IP3 is essential for normal hearing: animal models of the Cx26 deficiency in the organ of Corti (one of the compartments) seem to suggest the death of sensory cells (outer and inner hair cells, OHC and IHC, respectively) due to failed K+ homeostasis as the underlying problem. However, this mechanism may not be the only one. In search for alternative mechanisms we have used a large scale three-dimensional model of mechano-electrical transduction of sound in the cochlea (Mistrik et al., 2009). Indeed, a careful analysis revealed that reduced GJ conductivity in the organ of Corti would decrease the receptor potential across the OHC basolateral membrane. As the OHC electromotility is crucial for sound amplification granting the cochlear sensitivity and frequency selectivity we conclude that the reduction of the OHC somatic electromotility could represent an additional pathological mechanism in the Cx26 related forms of deafness.

See Also:

Download slides icon Download slides: licsb09_mistrik_rgm_01.pdf (1.4 MB)

Help icon Streaming Video Help

Link this page

Would you like to put a link to this lecture on your homepage?
Go ahead! Copy the HTML snippet !

Write your own review or comment:

make sure you have javascript enabled or clear this field: