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Updated: Jul 28, 2026
13:47
Ex utero Electroporation and Whole Hemisphere Explants: A Simple Experimental Method for Studies of Early Cortical Development
Published on: April 3, 2013
Reelin binds alpha3beta1 integrin and inhibits neuronal migration
L Dulabon1, E C Olson, M G Taglienti
1Department of Biology and Neuroscience, Pennsylvania State University, University Park 16802, USA.
Neuron
|August 12, 2000
Summary
Reelin signaling, crucial for brain development, halts neuronal migration by binding to alpha3beta1 integrin. This interaction regulates neuron-glia adhesion, ensuring proper cerebral cortex lamination.
Area of Science:
- Neuroscience
- Developmental Biology
- Cell Biology
Background:
- Cerebral cortical lamination disorders arise in mice lacking Reelin, Dab1, or specific receptors like VLDL receptor (VLDLR) and ApoE receptor 2 (ApoER2).
- The precise mechanisms by which Reelin and its receptors govern cortical layer formation remain unclear.
Purpose of the Study:
- To elucidate the role of Reelin in regulating cortical neuronal migration and cerebral cortex development.
- To identify the molecular interactions Reelin utilizes to control neuronal positioning.
Main Methods:
- In vitro and in vivo studies of cortical neuronal migration in mouse models.
- Biochemical assays to investigate Reelin's association with cellular receptors.
- Analysis of signaling protein levels, including Dab1, in response to Reelin and integrin interactions.
Main Results:
- Reelin was found to inhibit cortical neuron migration and facilitate their detachment from radial glia.
- Reelin directly associates with alpha3beta1 integrin, a key regulator of neuron-glia adhesion.
- The Reelin-alpha3beta1 integrin interaction is essential for Reelin's effects on neuronal migration both in vitro and in vivo.
- Absence of alpha3beta1 integrin resulted in decreased levels of the downstream signaling protein Dab1.
Conclusions:
- Reelin arrests neuronal migration and promotes cortical lamination by binding to alpha3beta1 integrin.
- This binding modulates integrin-mediated cell adhesion, influencing neuron-glia interactions.
- Alpha3beta1 integrin acts as a crucial mediator in the Reelin signaling pathway for proper brain development.
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