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Fate mapping of the mouse prosencephalic neural plate
1Division of Biochemistry and Cellular Biology, National Institute of Neuroscience, National Center of Neurology and Psychiatry, 4-1-1, Ogawahigashi, Kodaira, Tokyo, 187-8502, Japan.
Developmental Biology
|March 1, 2000
Summary
Cell movement in the developing mammalian brain is restricted early on. This study reveals how specific genes and cell adhesion molecules help define brain regions like the forebrain.
Area of Science:
- Developmental biology
- Neuroscience
- Genetics
Background:
- Studying early mammalian brain development in utero is challenging.
- Understanding cell behavior in the anterior neural plate/tube is crucial for developmental neuroscience.
Purpose of the Study:
- To investigate the behavior and fate of neuroepithelial cells in the developing mammalian embryo.
- To identify the molecular mechanisms restricting cell movement and defining brain compartments.
Main Methods:
- Utilized a whole-embryo culture system to trace neuroepithelial cells in mouse embryos.
- Employed vital dye labeling to track cell lineage and movement over 1-2 days.
- Analyzed gene and protein expression patterns, including transcription factors and cell adhesion molecules.
Main Results:
- Rostral cell movement from midbrain to forebrain was restricted by the five-somite stage.
- Expression of Pax6 and cadherin-6 demarcated the forebrain compartment, coinciding with restricted cell intermingling.
- Mapped prospective telencephalon and diencephalon regions to the eyes within the forebrain compartment.
Conclusions:
- Early cell movement restriction and molecular cues (Pax6, cadherin-6) establish mammalian forebrain compartments.
- The conserved fate map of the prosencephalic neural plate suggests a common vertebrate developmental framework.
- Mammalian-specific brain structures, like the neocortex, may develop upon this conserved neuromeric framework.