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Updated: Jun 29, 2026
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Cryosectioning and Immunostaining Mouse Inner Ear Tissue: From Embryonic to Adult Stages
Published on: April 11, 2025
Is otospiralin inner ear specific? Evidence for its expression in mouse brain
Boris Decourt1, Dean Hillman, Yohan Bouleau
1INSERM U587 and University of Bordeaux 2, Institut des Neurosciences de Bordeaux, Bordeaux F-33076, France.
Summary
Otospiralin, initially an inner ear molecule, is widely expressed in the mouse central nervous system (CNS). Its expression increases in astrocytes following brain injury, suggesting a role in CNS repair.
Area of Science:
- Neuroscience
- Molecular Biology
- Cell Biology
Background:
- Otospiralin was initially identified as an inner ear specific molecule.
- High-throughput sequencing suggested potential central nervous system (CNS) expression.
Purpose of the Study:
- To investigate the expression and localization of otospiralin in the CNS.
- To explore otospiralin's potential role in CNS injury and repair.
Main Methods:
- In situ hybridization
- Immunohistochemistry
- Ultrastructural analysis
- Mechanical trauma model in mouse cerebral cortex
Main Results:
- Otospiralin is widely expressed in mouse CNS neurons and glia.
- Ultrastructural localization revealed otospiralin near membranous organelles, post-synaptic membranes, and astrocytic processes.
- Mechanical trauma increased otospiralin expression in reactive astrocytes, but not neurons.
Conclusions:
- Otospiralin is a CNS-expressed protein with a predicted transmembrane domain.
- The protein's altered expression post-injury suggests a role in CNS repair mechanisms.
