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Identification and characterization of a population of motile neurons in long-term cortical culture


Haas, MA and Chuckowree, JA and Chung, RS and Vickers, JC and Dickson, TC, Identification and characterization of a population of motile neurons in long-term cortical culture, Cell Motility and the Cytoskeleton, 64, (4) pp. 274-287. ISSN 0886-1544 (2007) [Refereed Article]

DOI: doi:10.1002/cm.20182


The specific phenotypes and progression to maturity of primary cortical neurons in long-term culture correlate well with neurons in vivo. Utilizing a model of neuronal injury in long-term cultures at 21 days in vitro (DIV), we have identified a distinct population of neurons that translocate into the injury site. 5-Bromo-2′-deoxyUridine (BrdU) incorporation studies demonstrated that neurons with the capacity to translocate were 21 days old. However, this motile ability is not consistent with the traditional view of the maturation and structural stability of neurons in long-term culture. Therefore, we examined the neurons' cytoskeletal profile using immunocytochemistry, to establish relative stage of maturation and phenotype. Expression of marker proteins including β-III-tubulin, α-internexin, NF-L and NF-M, tau and L1 indicated the neurons were differentiated, and in some cases polarized. The neurons did not immunolabel with NF-H or MAP2, which might suggest they had not reached the level of maturity of other neurons in culture. They did not express the microtubule-associated migration marker doublecortin (DCX). Cytoskeletal disrupting agents were used to further investigate the role of the microtubule cytoskeleton in translocation, and microtubule destabilization significantly enhanced aspects of their motility. Finally, molecular guidance cues affected their motility in a similar manner to that reported for both axon guidance and early neuron migration. Therefore, this study has identified and characterized a population of motile neurons in vitro that have the capacity to migrate into a site of injury. These studies provide new information on the structurally dynamic features of subsets of neurons. © 2007 Wiley-Liss, Inc.

Item Details

Item Type:Refereed Article
Research Division:Biomedical and Clinical Sciences
Research Group:Neurosciences
Research Field:Neurology and neuromuscular diseases
Objective Division:Health
Objective Group:Other health
Objective Field:Other health not elsewhere classified
UTAS Author:Haas, MA (Dr Matilda Haas)
UTAS Author:Chuckowree, JA (Dr Jyoti Chuckowree)
UTAS Author:Chung, RS (Associate Professor Roger Chung)
UTAS Author:Vickers, JC (Professor James Vickers)
UTAS Author:Dickson, TC (Professor Tracey Dickson)
ID Code:41215
Year Published:2007
Web of Science® Times Cited:2
Deposited By:Menzies Institute for Medical Research
Deposited On:2007-08-01
Last Modified:2009-09-10

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