Reference : CNP/cGMP signaling regulates axon branching and growth by modulating microtubule poly...

	Document type :	Scientific journals : Article
	Discipline(s) :	Life sciences : Biochemistry, biophysics & molecular biology
	To cite this reference:	http://hdl.handle.net/10993/27305

Title :	CNP/cGMP signaling regulates axon branching and growth by modulating microtubule polymerization
Language :	English
Author, co-author :	Xia, Caihong [Zilkha Neurogenetic Institute, Keck School of Medicine, University of Southern California, Los Angeles, CA, United States]
	Nguyen, Minh Vu Chong [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Life Science Research Unit]
	Garrison, Amy K. [Zilkha Neurogenetic Institute, Keck School of Medicine, University of Southern California, Los Angeles, CA, United States, Program in Genetic, Molecular and Cellular Biology, Keck School of Medicine, University of Southern California, Los Angeles, CA, United States]
	Zhao, Zhen [Zilkha Neurogenetic Institute, Keck School of Medicine, University of Southern California, Los Angeles, CA, United States, Neuroscience Graduate Program, University of Southern California, Los Angeles, CA, United States]
	Wang, Zheng [Zilkha Neurogenetic Institute, Keck School of Medicine, University of Southern California, Los Angeles, CA, United States]
	Sutherland, Calum [Biomedical Research Institute, University of Dundee, Ninewells Medical School, DD1 9SY Dundee, United Kingdom]
	Ma, Le [Zilkha Neurogenetic Institute, Keck School of Medicine, University of Southern California, Los Angeles, CA, United States, Program in Genetic, Molecular and Cellular Biology, Keck School of Medicine, University of Southern California, Los Angeles, CA, United States, Neuroscience Graduate Program, University of Southern California, Los Angeles, CA, United States, Department of Cell and Neurobiology, Keck School of Medicine, Los Angeles, CA, United States]
Publication date :	2013
Journal title :	Developmental Neurobiology
Volume :	73
Issue/season :	9
Pages :	673-687
Peer reviewed :	Yes (verified by ORBilu)
Audience :	International
ISSN :	19328451
Keywords :	[en] Axon branching and growth ; CNP/cGMP ; CRMP2 ; DRG axons ; Microtubule dynamics ; Western blotting ; Animals ; Axons ; Cells, Cultured ; Cercopithecus aethiops ; COS Cells ; Cyclic GMP ; Ganglia, Spinal ; Growth Cones ; Microtubules ; Natriuretic Peptide, C-Type ; Nerve Tissue Proteins ; Nocodazole ; Phosphorylation ; Rats ; Rats, Sprague-Dawley ; Signal Transduction ; Tubulin Modulators
Abstract :	[en] The peptide hormone CNP has recently been found to positively regulate axon branching and growth via activation of cGMP signaling in embryonic dorsal root ganglion (DRG) neurons, but the cellular mechanisms mediating the regulation of these developmental processes have not been established. In this study, we provide evidence linking CNP/cGMP signaling to microtubule dynamics via the microtubule regulator CRMP2. First, phosphorylation of CRMP2 can be suppressed by cGMP activation in embryonic DRG neurons, and non-phosphorylated CRMP2 promotes axon branching and growth. In addition, real time analysis of growing microtubule ends indicates a similar correlation of CRMP2 phosphorylation and its activity in promoting microtubule polymerization rates and durations in both COS cells and DRG neuron growth cones. Moreover, direct activation of cGMP signaling leads to increased assembly of dynamic microtubules in DRG growth cones. Finally, low doses of a microtubule depolymerization drug nocodazole block CNP/cGMP-dependent axon branching and growth. Taken together, our results support a critical role of microtubule dynamics in mediating CNP/cGMP regulation of axonal development. © 2013 Wiley Periodicals, Inc.
Permalink :	http://hdl.handle.net/10993/27305
DOI :	10.1002/dneu.22078

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