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Genetic Manipulation of Cerebellar Granule Neurons In Vitro and In Vivo to Study Neuronal Morphology and Migration
Published on: March 17, 2014
Molecular and cellular control of dendrite maturation during brain development
1F. Hoffmann-La Roche Ltd., CNS Discovery Research, CH-4070 Basel, Switzerland. friedrich.metzger@roche.com
Current Molecular Pharmacology
|December 25, 2009
Summary
Neuronal dendrite development involves branch extension/retraction and synaptic stabilization. Common mechanisms, including Ca2+-dependent signaling, guide maturation in different neuron types, suggesting a general model for neuronal connectivity.
Area of Science:
- Neuroscience
- Developmental Biology
Background:
- Neuronal dendrites undergo complex development involving extension, retraction, and synaptic stabilization.
- Dendritic maturation is tightly regulated and follows specific differentiation stages.
Purpose of the Study:
- To review dendritic maturation processes in cerebellar Purkinje cells and spinal motoneurons.
- To identify common mechanisms underlying dendritic development in distinct neuronal types.
Main Methods:
- Comparative review of cerebellar Purkinje cells and spinal motoneurons.
- Analysis of genetic, growth factor, and synaptic input influences on dendritic maturation.
Main Results:
- Early dendritic outgrowth is controlled by cell-intrinsic genetic programs and local growth factors.
- Later maturation is promoted by synaptic input, limiting overgrowth via Ca2+-dependent signaling (PKC, CaMKII).
- Shared mechanisms observed in Purkinje cells and motoneurons, despite functional differences.
Conclusions:
- Dendritic maturation involves distinct but coordinated stages of outgrowth and stabilization.
- Common signaling pathways, particularly Ca2+-dependent pathways, are crucial for neuronal connectivity.
- A generalized concept for intercellular control of neuronal connectivity is proposed.
