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Generation of Dispersed Presomitic Mesoderm Cell Cultures for Imaging of the Zebrafish Segmentation Clock in Single Cells
Published on: July 24, 2014
A clock and trail model for somite formation, specialization and polarization
1Récepteurs et Cognition, CNRS URA 2182, Institut Pasteur, 25, rue du Docteur Roux, Paris Cedex 15, F-75724, France.
Journal of Theoretical Biology
|July 7, 2000
Summary
Embryonic segmentation may involve a spatial sine wave pre-pattern originating from a cellular oscillator. This wave, potentially influenced by multimer formation, explains somite formation, polarization, and gene expression patterns in zebrafish somitogenesis.
Area of Science:
- Developmental Biology
- Cellular Oscillations
- Embryogenesis
Background:
- Embryonic segmentation, particularly somite formation, is a complex process.
- The underlying mechanisms of pre-patterning and somitogenesis remain incompletely understood.
Purpose of the Study:
- To propose theoretical considerations for the initial pre-patterning process during embryonic segmentation.
- To explain somite formation, polarization, and specific gene expression patterns.
Main Methods:
- Theoretical modeling of cellular oscillators and wave formation.
- Analysis of spatial and temporal dynamics of molecular factors.
Main Results:
- A stable spatial sinusoidal (periodic) wave is proposed as the initial pre-pattern.
- Cells record the oscillator's state upon leaving the proliferative zone, forming a spatial sine wave trail.
- Multimerization of factors can lead to higher frequency oscillations and shorter wavelengths, explaining multiple wavelengths in somitogenesis.
Conclusions:
- The proposed spatial sine wave model provides a framework for understanding somite formation and polarization.
- Multimerization offers a potential explanation for complex wavelength phenomena observed in somitogenesis, such as her1 expression in zebrafish.
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