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Segment-specific expression of the neuronatin gene during early hindbrain development
J Wijnholds1, K Chowdhury, R Wehr
1Department of Molecular Cell Biology, Max Planck Institute of Biophysical Chemistry, Am Fassberg, Göttingen, Germany.
Developmental Biology
|September 1, 1995
Summary
Mouse neuronatin gene expression is crucial for hindbrain segmentation and pituitary development. This gene plays a role in maintaining segment identity and the overall structure of the nervous system.
Area of Science:
- Developmental biology
- Neuroscience
- Molecular biology
Background:
- The developing hindbrain exhibits segmentation into neuromeres/rhombomeres.
- Krox-20 and Hox genes are known molecular markers and patterning factors in hindbrain development.
Purpose of the Study:
- To identify novel genes involved in hindbrain segmentation and early development.
- To investigate the function of the newly identified mouse neuronatin gene.
Main Methods:
- Subtractive hybridization was used to identify downregulated genes in differentiating P19 cells.
- Expression patterns of the neuronatin gene were analyzed during embryonic development.
Main Results:
- Mouse neuronatin gene was identified and found to be downregulated during partial differentiation.
- Neuronatin is transiently expressed in rhombomeres 3 and 5, floor of the foregut pocket, Rathke's pouch, and developing inner ear.
- Later, neuronatin shows strong expression in the central and peripheral nervous system.
Conclusions:
- Neuronatin is implicated in maintaining hindbrain segment identity.
- Neuronatin likely plays a role in pituitary development and the maturation/maintenance of the nervous system structure.