Coordination of Actin Filament and Microtubule Dynamics during Neurite Outgrowth

Andrew W. Schaefer, Vincent Th G Schoonderwoert, Lin Ji, Nelson Mederios, Gaudenz Danuser, Paul Forscher

Research output: Contribution to journalArticle

144 Scopus citations

Abstract

Although much evidence suggests that axon growth and guidance depend on well-coordinated cytoskeletal dynamics, direct characterization of the corresponding molecular events has remained a challenge. Here, we address this outstanding problem by examining neurite outgrowth stimulated by local application of cell adhesion substrates. During acute outgrowth, the advance of organelles and underlying microtubules was correlated with regions of attenuated retrograde actin network flow in the periphery. Interestingly, as adhesion sites matured, contractile actin arc structures, known to be regulated by the Rho/Rho Kinase/myosin II signaling cascade, became more robust and coordinated microtubule movements in the growth cone neck. When Rho Kinase was inhibited, although growth responses occurred with less of a delay, microtubules failed to consolidate into a single axis of growth. These results reveal a role for Rho Kinase and myosin II contractility in regulation of microtubule behavior during neuronal growth.

Original languageEnglish (US)
Pages (from-to)146-162
Number of pages17
JournalDevelopmental cell
Volume15
Issue number1
DOIs
StatePublished - Jul 8 2008

Keywords

  • CELLBIO
  • MOLNEURO

ASJC Scopus subject areas

  • Molecular Biology
  • Biochemistry, Genetics and Molecular Biology(all)
  • Developmental Biology
  • Cell Biology

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    Schaefer, A. W., Schoonderwoert, V. T. G., Ji, L., Mederios, N., Danuser, G., & Forscher, P. (2008). Coordination of Actin Filament and Microtubule Dynamics during Neurite Outgrowth. Developmental cell, 15(1), 146-162. https://doi.org/10.1016/j.devcel.2008.05.003