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Annu Rev Cell Dev Biol. 2002;18:601-35. Epub 2002 Apr 2.

Actin cytoskeleton regulation in neuronal morphogenesis and structural plasticity.

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1
Department of Biological Sciences, Neurosciences Program, Stanford University, California 94305, USA. lluo@stanford.edu

Abstract

The actin cytoskeleton plays a major role in morphological development of neurons and in structural changes of adult neurons. This article reviews the myriad functions of actin and myosin in axon initiation, growth, guidance and branching, in morphogenesis of dendrites and dendritic spines, in synapse formation and stability, and in axon and dendrite retraction. Evidence is presented that signaling pathways involving the Rho family of small GTPases are key regulators of actin polymerization and myosin function in the context of different aspects of neuronal morphogenesis. These studies support an emerging theme: Different aspects of neuronal morphogenesis may involve regulation of common core signaling pathways, in particular the Rho GTPases.

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