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Related Experiment Video

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Initiating Differentiation in Immortalized Multipotent Otic Progenitor Cells

Initiating Differentiation in Immortalized Multipotent Otic Progenitor Cells

Published on: January 2, 2016

Expression and function of Sox21 during mouse cochlea development.

Makoto Hosoya¹, Masato Fujioka, Satoru Matsuda

¹Department of Physiology, School of Medicine, Keio University, Tokyo, Japan.

Neurochemical Research

|February 3, 2011

Summary

Sox21 is crucial for inner ear development, specifically in supporting cells near hair cells. Sox21-deficient mice show mild hearing loss and altered hair cell polarity, suggesting a role in fine-tuning cell fate.

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Area of Science:

Developmental Biology
Genetics
Neuroscience

Background:

Inner ear development involves precise cell-type generation.
Sox gene family members are critical for cell-fate determination in the inner ear.

Purpose of the Study:

To investigate the expression pattern of Sox21 in the developing and adult murine cochlea.
To understand the role of Sox21 in inner ear development and function.

Main Methods:

Analysis of Sox21 expression during murine cochlear development.
Auditory brainstem response testing in Sox21 knockout mice.

Main Results:

Sox21 expression shifts from widespread in early development to specific supporting cells in adults.
Sox21 knockout mice exhibit mild hearing impairments and defects in hair cell planar cell polarity.
Sox21 is expressed in supporting cells adjacent to hair cells.

Conclusions:

Sox21 plays a role in refining cell fate decisions during inner ear development.
Sox21 acts as a counteracting partner to SoxB1 family members.
Sox21 expression patterns can identify specific supporting cell populations.