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Expression of a potassium current in inner hair cells during development of hearing in mice
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posted on 2023-06-08, 07:35 authored by Corne Kros, J Peter Ruppersberg, Alfons RüschExcitable cells use ion channels to tailor their biophysical properties to the functional demands made upon them1. During development, these demands may alter considerably, often associated with a change in the cells' complement of ion channels2-4. Here we present evidence for such a change in inner hair cells, the primary sensory receptors in the mammalian cochlea. In mice, responses to sound can first be recorded from the auditory nerve and observed behaviourally from 10-12 days after birth; these responses mature rapidly over the next 4 days5-8. Before this time, mouse inner hair cells have slow voltage responses and fire spontaneous and evoked action potentials. During development of auditory responsiveness a large, fast potassium conductance is expressed, greatly speeding up the membrane time constant and preventing action potentials. This change in potassium channel expression turns the inner hair cell from a regenerative, spiking pacemaker into a high-frequency signal transducer
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Publication status
- Published
Journal
NatureISSN
00280836Publisher
NatureExternal DOI
Issue
6690Volume
394Page range
281 - 284ISBN
0028-0836Department affiliated with
- Neuroscience Publications
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- No
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- Yes
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2012-02-06Usage metrics
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