Centrosome Motility Is Essential for Initial Axon Formation in the Neocortex
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Tsai-Centrosome Motility.pdf
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Author(s)
Calderon de Anda, Froylan
Meletis, Konstantinos
Ge, Xuecai
Rei, Damien
Tsai, Li-Huei
Date Issued
August 2010
Journal
Journal of Neuroscience
Publisher
Society for Neuroscience
Citation
de Anda, F. C. et al. “Centrosome Motility Is Essential for Initial Axon Formation in the Neocortex.” Journal of Neuroscience 30.31 (2010): 10391–10406. Web. 27 June 2012.
Version
Final published version
Abstract
The mechanisms underlying the normal development of neuronal morphology remain a fundamental question in neurobiology. Studies in cultured neurons have suggested that the position of the centrosome and the Golgi may predict the site of axon outgrowth. During neuronal migration in the developing cortex, however, the centrosome and Golgi are oriented toward the cortical plate at a time when axons grow toward the ventricular zone. In the current work, we use in situ live imaging to demonstrate that the centrosome and the accompanying polarized cytoplasm exhibit apical translocation in newborn cortical neurons preceding initial axon outgrowth. Disruption of centrosomal activity or downregulation of the centriolar satellite protein PCM-1 affects axon formation. We further show that downregulation of the centrosomal protein Cep120 impairs microtubule organization, resulting in increased centrosome motility. Decreased centrosome motility resulting from microtubule stabilization causes an aberrant centrosomal localization, leading to misplaced axonal outgrowth. Our results reveal the dynamic nature of the centrosome in developing cortical neurons, and implicate centrosome translocation and microtubule organization during the multipolar stage as important determinants of axon formation.
MIT Department
Massachusetts Institute of Technology. Department of Brain and Cognitive Sciences
Picower Institute for Learning and Memory
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1523/jneurosci.0381-10.2010
