Formation of Microtubule-based Traps Controls the Sorting and Concentration of Vesicles to Restricted Sites of Regenerating Neurons After Axotomy.
From: Department of Neurobiology, Institute of Life Science, The Hebrew University of Jerusalem, Jerusalem, Israel.
The Journal of cell biology
- Publish Date: Feb 2007
- ISSN: 0021-9525
- Volume: 176
- Issue: 4
- Pages: 497-507
- Medium: Print
- Language: English
- Citation (JAMA): Erez Hadas, Malkinson Guy, Prager-Khoutorsky Masha, et al. Formation of Microtubule-based Traps Controls the Sorting and Concentration of Vesicles to Restricted Sites of Regenerating Neurons After Axotomy.. J. Cell Biol. Feb 2007;176:497-507
Abstract
Transformation of a transected axonal tip into a growth cone (GC) is a critical step in the cascade leading to neuronal regeneration. Critical to the regrowth is the supply and concentration of vesicles at restricted sites along the cut axon. The mechanisms underlying these processes are largely unknown. Using online confocal imaging of transected, cultured Aplysia californica neurons, we report that axotomy leads to reorientation of the microtubule (MT) polarities and formation of two distinct MT-based vesicle traps at the cut axonal end. Approximately 100 microm proximal to the cut end, a selective trap for anterogradely transported vesicles is formed, which is the plus end trap. Distally, a minus end trap is formed that exclusively captures retrogradely transported vesicles. The concentration of anterogradely transported vesicles in the former trap optimizes the formation of a GC after axotomy.
Mesh Headings (Keywords): Animals, Aplysia, Axonal Transport, Axotomy, Cell Polarity, Cells, Cultured, Denervation, Growth Cones, Microtubules, Nerve Regeneration, Nervous System, Transport Vesicles
Check for Full Text / PubMed Unique Identifier (PMID): 17283182
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