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Selective adhesion of cells from different telencephalic regions
M Gotz1, A Wizenmann, S Reinhardt
1SmithKline Beecham, New Frontiers Science Park North, Harlow, Essex, United Kingdom.
Neuron
|March 1, 1996
Summary
Cellular adhesion properties guide forebrain development in rodents and birds. Differential adhesion mechanisms restrict cell mixing, maintaining positional information during development.
Area of Science:
- Developmental biology
- Neuroscience
- Cell adhesion
Background:
- The developing forebrain requires mechanisms to organize distinct cellular populations.
- Understanding how cellular segregation is achieved is crucial for comprehending brain development.
Purpose of the Study:
- To investigate if differential adhesive properties guide the segregation of cells from different telencephalic regions during development.
- To identify the molecular mechanisms underlying this cellular segregation.
Main Methods:
- Short-term aggregation assay using cells from various rodent and avian telencephalic regions.
- Analysis of cell segregation patterns at different developmental stages.
- Selective removal of calcium-dependent and calcium-independent adhesion molecules.
Main Results:
- Neurons and precursor cells from the cortex segregated from striatal cells at early developmental stages.
- Cells from rodent neocortex and hippocampus showed segregation only at later stages.
- Segregation was dependent on calcium-dependent adhesion molecules and potentially mediated by the CD15 (Lewis(x)) epitope.
Conclusions:
- Selective cell adhesion is a conserved mechanism for restricting cellular mixing in the developing forebrain.
- This process is vital for maintaining positional information during brain development.
- Calcium-dependent adhesion, possibly involving CD15, plays a key role in regional segregation.