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Cell-Intrinsic Control of Interneuron Migration Drives Cortical Morphogenesis
Carla G Silva1, Elise Peyre1, Mohit H Adhikari2
1GIGA-Neurosciences, University of Liège, C.H.U. Sart Tilman, Liège 4000, Belgium.
Cell
|February 24, 2018
Summary
Carboxypeptidase 1 regulates the pausing of migrating cortical interneurons, controlling their invasion into the developing brain. This regulation impacts interneuron numbers and the generation of upper-layer projection neurons.
Area of Science:
- Neuroscience
- Developmental Biology
- Cell Biology
Background:
- Cortical interneuron migration is crucial for brain development, involving complex cellular movements.
- Interneuron migration relies on the coordination of movement and pausing, influenced by extracellular cues and genetic factors.
- The molecular mechanisms governing the regulation of pausing during interneuron migration remain poorly understood.
Purpose of the Study:
- To investigate the molecular regulation of pausing in migrating cortical interneurons.
- To identify proteins involved in coordinating the saltatory migration of interneurons.
- To understand the impact of migration pausing on cortical development and neuronal populations.
Main Methods:
- Utilized molecular biology techniques to study protein function in interneuron migration.
- Investigated the role of carboxypeptidase 1 in regulating protein post-translational modifications.
- Analyzed the effects of manipulating carboxypeptidase 1 on interneuron migration dynamics and cortical development in vivo.
Main Results:
- Identified carboxypeptidase 1 as a key regulator of pausing in migrating cortical interneurons.
- Demonstrated that carboxypeptidase 1 promotes post-translational protein deglutamylation, influencing migration.
- Showed that impaired pausing regulation affects interneuron population size and projection neuron development.
Conclusions:
- Carboxypeptidase 1 controls the pausing behavior of migrating cortical interneurons.
- Migration pausing is essential for regulating the flow and final positioning of interneurons within the cortex.
- Disruption of carboxypeptidase 1-mediated pausing impairs cortical interneuron settlement and the generation of upper-layer neurons.
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