Integration of neuronal clones in the radial cortical columns by EphA and ephrin-A signalling
- 1Department of Neurobiology and Kavli Institute for Neuroscience, Yale University School of Medicine, 333 Cedar Street, New Haven, Connecticut 06510, USA. masaaki.torii@yale.edu
- 0Department of Neurobiology and Kavli Institute for Neuroscience, Yale University School of Medicine, 333 Cedar Street, New Haven, Connecticut 06510, USA. masaaki.torii@yale.edu
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View abstract on PubMed
Summary
This summary is machine-generated.Proper assembly of cerebral cortical columns relies on lateral dispersion of neurons. Ephrin A (Efna) signaling guides this neuronal migration, ensuring correct column formation and intermixing of cell types.
Area Of Science
- Neuroscience
- Developmental Biology
- Cell Biology
Background
- The cerebral cortex contains radial columns, crucial for information processing.
- Neuronal migration along radial glial fibers forms these columns.
- The molecular mechanisms of lateral neuronal dispersion remain unclear.
Purpose Of The Study
- Investigate the molecular mechanisms governing lateral neuronal dispersion during cortical development.
- Determine the role of Eph receptor A (EphA) and ephrin A (Efna) signaling in neuronal migration and column assembly.
- Understand the significance of lateral dispersion for proper cortical organization.
Main Methods
- Utilized EphA and Efna signaling pathways.
- Generated Efna knockout mice.
- Employed in utero electroporation to study neuronal migration.
- Analyzed neuronal labeling patterns in developing cortical plates.
Main Results
- EphA/Efna signaling is essential for proper cortical column assembly.
- Efna knockout mice exhibit alternating columnar compartment labeling due to impaired lateral dispersion.
- Lateral dispersion is dependent on EphA and Efna expression levels during neuronal migration.
- Cell production and death were not altered in Efna knockout mice.
Conclusions
- A novel mechanism involving EphA/Efna-dependent lateral neuronal dispersion is critical for cortical column formation.
- This process ensures proper intermixing of neuronal types within columns.
- Disruption of this mechanism may contribute to neuropsychiatric disorders linked to abnormal cortical organization.
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