Ena/VASP Is Required for Neuritogenesis in the Developing Cortex
Author(s)Kwiatkowski, Adam V.; Rubinson, Douglas A.; Dent, Erik W.; Edward van Veen, J.; Leslie, Jonathan D.; Zhang, Jiangyang; Mebane, Leslie Marie; Philippar, Ulrike; Pinheiro, Elaine M.; Burds, Aurora A.; Bronson, Roderick T.; Mori, Susumu; Gertler, Frank; Fassler, Reinhard; ... Show more Show less
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Mammalian cortical development involves neuronal migration and neuritogenesis; this latter process forms the structural precursors to axons and dendrites. Elucidating the pathways that regulate the cytoskeleton to drive these processes is fundamental to our understanding of cortical development. Here we show that loss of all three murine Ena/VASP proteins, a family of actin regulatory proteins, causes neuronal ectopias, alters intralayer positioning in the cortical plate, and, surprisingly, blocks axon fiber tract formation during corticogenesis. Cortical fiber tract defects in the absence of Ena/VASP arise from a failure in neurite initiation, a prerequisite for axon formation. Neurite initiation defects in Ena/VASP-deficient neurons are preceded by a failure to form bundled actin filaments and filopodia. These findings provide insight into the regulation of neurite formation and the role of the actin cytoskeleton during cortical development.
DepartmentDavid H. Koch Institute for Integrative Cancer Research at MIT; Massachusetts Institute of Technology. Department of Biology
Kwiatkowski, Adam V., Douglas A. Rubinson, Erik W. Dent, J. Edward van Veen, Jonathan D. Leslie, Jiangyang Zhang, Leslie M. Mebane, et al. “Ena/VASP Is Required for Neuritogenesis in the Developing Cortex.” Neuron 56, no. 3 (November 2007): 441-455. Copyright © 2007 Elsevier Inc.
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