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Stem cell-like Xenopus Embryonic Explants to Study Early Neural Developmental Features In Vitro and In Vivo
Published on: February 2, 2016
Sonic hedgehog expression during Xenopus laevis forebrain development
L Domínguez1, A González, N Moreno
1Department of Cell Biology, Faculty of Biology, University Complutense of Madrid, 28040 Madrid, Spain.
Brain Research
|June 15, 2010
Summary
We analyzed x-Shh gene expression in the Xenopus forebrain, revealing conserved patterns across tetrapods but also unique differences. These findings offer insights into forebrain evolution and organization.
Area of Science:
- Developmental Biology
- Neuroscience
- Evolutionary Biology
Background:
- Sonic hedgehog (Shh) signaling is crucial for vertebrate forebrain development.
- Understanding Shh expression patterns aids in deciphering forebrain organization and evolution.
Purpose of the Study:
- To analyze the developing expression pattern of x-Shh in the Xenopus forebrain.
- To interpret these patterns within the neuromeric model for evolutionary insights.
- To characterize x-Shh expressing forebrain subdivisions and neurons.
Main Methods:
- In situ hybridization for x-Shh.
- Immunohistochemistry for forebrain markers (Islet 1, Orthopedia, NKX2.1, NKX2.2, tyrosine hydroxylase).
Main Results:
- x-Shh expression observed in the telencephalic commissural preoptic area, correlated with pallidum/basal telencephalic cholinergic system.
- x-Shh found in the diencephalic zona limitans intrathalamica and extending into the prethalamus.
- Consistent basal hypothalamic x-Shh expression, with additional expression in the alar suprachiasmatic region.
Conclusions:
- Xenopus forebrain Shh expression largely conserved among tetrapods.
- Identified differences may reflect evolutionary changes in forebrain organization.
- Provides a framework for understanding conserved and divergent Shh roles in vertebrate brain evolution.
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