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Published on: February 4, 2010
Calbindin and S100 protein expression in the developing inner ear in mice
1Department of Auditory Neuroscience, Institute of Experimental Medicine, Academy of Sciences of the Czech Republic, Prague, Czech Republic. bucki@biomed.cas.cz
The Journal of Comparative Neurology
|February 20, 2009
Summary
Calbindin (CB) and S100 are calcium-binding proteins in the inner ear. Their distinct expression patterns during mouse development suggest independent roles in inner ear formation.
Area of Science:
- Neuroscience
- Developmental Biology
- Otolaryngology
Background:
- Calbindin (CB) and S100 are calcium-binding proteins found in the vertebrate inner ear.
- Their specific developmental functions within the inner ear remain incompletely understood.
Purpose of the Study:
- To investigate and compare the spatiotemporal expression patterns of CB and S100 during inner ear development in C3H mice.
- To elucidate the distinct developmental roles of these proteins in the cochlea and vestibular system.
Main Methods:
- Immunohistochemistry was employed to detect CB and S100 expression.
- Analysis spanned from embryonic day 11 (E11) to postnatal day 10 (P10) in C3H mice.
Main Results:
- Calbindin (CB) expression was observed early in the otocyst and vestibulocochlear ganglion (VCG), hair cells, and stria vascularis, with later additions of Kölliker's organ.
- S100 expression initiated later in cochlear and vestibular epithelial cells, with distinct patterns in hair cells, VCG, spiral limbus, and stria vascularis.
- Expression sites for CB and S100 did not overlap significantly during the studied developmental stages.
Conclusions:
- CB and S100 exhibit independent and distinct expression patterns during mouse inner ear development.
- These differential expression profiles suggest unique roles for CB and S100 in specific cellular populations and developmental processes within the inner ear.
