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The mouse Laf4 gene: exon/intron organization, cDNA sequence, alternative splicing, and expression during central
Olga Britanova1, Sergey Lukyanov, Peter Gruss
1Department of Molecular Cell Biology, Max Planck Institute of Biophysical Chemistry, Am Fassberg 11, 37077, Göttingen, Germany.
Genomics
|June 25, 2002
Summary
Researchers identified mouse Laf4, a gene crucial for early cortical neuron development. Its expression changes significantly during brain development, suggesting a role in neuronal differentiation.
Area of Science:
- Neuroscience
- Developmental Biology
- Genetics
Background:
- The cerebral cortex exhibits significant neuronal diversity across its six layers.
- Cortical differentiation involves the transition of neuroblasts to young neurons.
- Identifying genes controlling this transition is key to understanding cortical development.
Purpose of the Study:
- To identify genes regulating the transition from neuroblast to young neuron.
- To investigate the role of the mouse homolog of human LAF4 (Laf4) in cortical differentiation.
Main Methods:
- Novel cDNA subtraction using mirror-orientation selection.
- Analysis of alternatively spliced Laf4 forms.
- Examination of Laf4 expression in wild-type and mutant mouse brains (Sey and reeler).
Main Results:
- Mouse Laf4, a homolog of human LAF4, was identified.
- Alternatively spliced Laf4 forms with varying transactivation functions were found.
- Laf4 expression is upregulated as neurons exit the ventricular zone (VZ) and downregulated postnatally.
- Laf4 expression is altered in Sey mutant embryos.
Conclusions:
- Laf4 plays a role in the transcriptional regulation of early cortical differentiation.
- Differential expression of Laf4 forms suggests distinct developmental roles.
- Laf4's altered expression in mutants highlights its importance in cortical development.