Title
Signaling mechanisms regulating Wallerian degeneration
UMMS Affiliation
Department of Neurobiology; Freeman Lab
Publication Date
2014-08-01
Document Type
Article
Disciplines
Neuroscience and Neurobiology
Abstract
Wallerian degeneration (WD) occurs after an axon is cut or crushed and entails the disintegration and clearance of the severed axon distal to the injury site. WD was initially thought to result from the passive wasting away of the distal axonal fragment, presumably because it lacked a nutrient supply from the cell body. The discovery of the slow Wallerian degeneration (Wld(s)) mutant mouse, in which distal severed axons survive intact for weeks rather than only one to two days, radically changed our thoughts on the autonomy of axon survival. Wld(s) taught us that under some conditions the axonal compartment can survive for weeks after axotomy without a cell body. The phenotypic and molecular characterization of Wld(S) and current models for Wld(S) molecular function are reviewed herein-the mechanism(s) by which Wld(S) spares severed axons remains unresolved. However, recent studies inspired by Wld(s) have led to the identification of the first 'axon death' signaling molecules whose endogenous activities promote axon destruction during WD.
DOI of Published Version
10.1016/j.conb.2014.05.001
Source
Curr Opin Neurobiol. 2014 Aug;27:224-31. doi: 10.1016/j.conb.2014.05.001. Epub 2014 Jun 5. Link to article on publisher's site
Journal/Book/Conference Title
Current opinion in neurobiology
Related Resources
PubMed ID
24907513
Repository Citation
Freeman, Marc R., "Signaling mechanisms regulating Wallerian degeneration" (2014). Neurobiology Publications and Presentations. 167.
https://escholarship.umassmed.edu/neurobiology_pp/167