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Published on: February 10, 2023
N-syndecan deficiency impairs neural migration in brain
Anni Hienola1, Sarka Tumova, Evgeny Kulesskiy
1Neuroscience Center, University of Helsinki, 00014 Helsinki, Finland. anni.hienola@helsinki.fi
The Journal of Cell Biology
|August 16, 2006
Summary
N-syndecan deficiency impairs brain development by disrupting neuronal migration in the cerebral cortex and rostral migratory stream. This defect is linked to impaired signaling pathways essential for cell movement.
Area of Science:
- Neuroscience
- Developmental Biology
- Cell Biology
Background:
- N-syndecan (syndecan-3) is a transmembrane proteoglycan found in developing brain pathways.
- It mediates neurite outgrowth when bound by heparin-binding growth-associated molecule (HB-GAM).
- The precise function of N-syndecan in brain development was previously unknown.
Purpose of the Study:
- To investigate the functional role of N-syndecan in the developing brain.
- To elucidate the mechanisms underlying N-syndecan's involvement in neuronal migration.
Main Methods:
- Analysis of N-syndecan-null mice to observe developmental defects.
- Investigation of radial and rostral migratory stream neural migration.
- Examination of HB-GAM-induced Src kinase activation and haptotactic migration.
- Study of N-syndecan interaction with the epidermal growth factor receptor (EGFR).
Main Results:
- N-syndecan deficiency leads to perturbed cerebral cortex laminar structure due to impaired radial migration.
- Neural migration is also impaired in the rostral migratory stream of N-syndecan-null mice.
- The migration defect is associated with reduced HB-GAM-induced Src kinase activation and haptotaxis.
- N-syndecan interacts with EGFR and is essential for EGFR-induced neuronal migration.
Conclusions:
- N-syndecan plays a critical role in regulating neuronal migration during brain development.
- Its function is mediated through pathways involving HB-GAM/Src kinase and EGFR signaling.
- Deficiency in N-syndecan results in significant structural and migratory defects in the developing brain.
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