Microtubule dynamics in axon guidance

Guofa Liu, Trisha Dwyer

Department of Biological Sciences, University of Toledo, Toledo, OH 43606, USA

Precise modulation of the cytoskeleton is involved in a variety of cellular processes including cell division, migration, polarity, and adhesion. In developing post-mitotic neurons, extracellular guidance cues not only trigger signaling cascades that act at a distance to indirectly regulate microtubule distribution, and assembly and disassembly in the growth cone, but also directly modulate microtubule stability and dynamics through coupling of guidance receptors with microtubules to control growth-cone turning. Microtubule-associated proteins including classical microtubule-associated proteins and microtubule plus-end tracking proteins are required for modulating microtubule dynamics to influence growth-cone steering. Multiple key signaling components, such as calcium, small GTPases, glycogen synthase kinase-3β, and c-Jun N-terminal kinase, link upstream signal cascades to microtubule stability and dynamics in the growth cone to control axon outgrowth and projection. Understanding the functions and regulation of microtubule dynamics in the growth cone provides new insights into the molecular mechanisms of axon guidance.

Keywords: axon guidance; growth cone; microtubule dynamics; signal transduction


Browse: 1414      Download: 708 

Copyright © 2005-2018 Neuroscience Bulletin All Rights Reserved.
您是第 位访问者,欢迎!
Shanghai ICP #05033115