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Published on: June 17, 2011
Nectins establish a checkerboard-like cellular pattern in the auditory epithelium
Hideru Togashi1, Kanoko Kominami, Masazumi Waseda
1Division of Molecular and Cellular Biology, Department of Biochemistry and Molecular Biology, Kobe University Graduate School of Medicine, Kobe 650-0017, Japan.
Science (New York, N.Y.)
|July 30, 2011
Summary
Nectin-1 and nectin-3 cell adhesion molecules are crucial for the precise checkerboard arrangement of sensory hair cells and supporting cells in the cochlea. Their interaction ensures proper cell spacing and prevents abnormal connections.
Area of Science:
- Cell Biology
- Developmental Biology
- Auditory Neuroscience
Background:
- The auditory epithelium of the cochlea exhibits a precise checkerboard-like arrangement of sensory hair cells and supporting cells.
- The molecular mechanisms governing this specific cellular patterning remain largely unknown.
Purpose of the Study:
- To investigate the role of immunoglobulin-like adhesion molecules in establishing the checkerboard pattern of auditory epithelia.
- To identify the specific molecules mediating heterotypic adhesion between hair cells and supporting cells.
Main Methods:
- Utilized mouse models to study the expression and function of nectin adhesion molecules.
- Investigated the effects of genetic removal of nectin-1 and nectin-3 on cellular arrangement.
- Performed co-culture experiments with cells expressing nectin-1 or nectin-3.
Main Results:
- Hair cells and supporting cells in the cochlea express nectin-1 and nectin-3, respectively.
- Genetic deletion of nectin-1 or nectin-3 disrupted the checkerboard pattern, leading to aberrant hair cell attachments.
- Co-cultured cells expressing nectin-1 or nectin-3 formed a mosaic pattern, indicating their role in cell-cell recognition and spacing.
Conclusions:
- Nectin-1 and nectin-3 mediate heterotypic adhesion between hair cells and supporting cells.
- These nectin molecules are essential for forming the characteristic checkerboard-like pattern in auditory epithelia.
- The findings elucidate a key mechanism in the development of sensory structures in the inner ear.
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