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Substance P-induced changes in cell genesis following diffuse traumatic brain injury


Carthew, HL and Ziebell, JM and Vink, R, Substance P-induced changes in cell genesis following diffuse traumatic brain injury, Neuroscience: An International Journal, 214 pp. 78-83. ISSN 0306-4522 (2012) [Refereed Article]

Copyright Statement

Copyright 2012 IBRO

DOI: doi:10.1016/j.neuroscience.2012.04.028


Inhibition of substance P (SP) activity through the use of NK1 receptor antagonists has been shown to be a promising neuroprotective therapy following traumatic brain injury (TBI). Conversely, recent research has implicated SP in the stimulation of neurogenesis, suggesting that the neuropeptide has the potential to promote recovery following TBI. This study characterised the effects of SP and the NK1 antagonist, n-acetyl tryptophan (NAT), on cell proliferation following diffuse TBI. Adult male Sprague-Dawley rats were injured using the impact acceleration model of TBI and randomly assigned to one of five treatment groups: sham, vehicle control, NAT alone, SP alone or SP with NAT. Cellular proliferation was assessed with immunostaining for bromodeoxyuridine (BrdU) and cell-specific markers. Infusion of SP (±NAT) promoted cellular proliferation in the subventricular zone and dentate gyrus following TBI. This increase was largely associated with microglial proliferation and did not correspond with functional improvements. These results suggest that NAT treatment results in neuroprotection following TBI, mediated in part via inhibition of microglia.

Item Details

Item Type:Refereed Article
Keywords:traumatic brain injury, substance p, neurogenesis, microglia, hippocampus, subventricular zone
Research Division:Biomedical and Clinical Sciences
Research Group:Neurosciences
Research Field:Neurosciences not elsewhere classified
Objective Division:Health
Objective Group:Clinical health
Objective Field:Clinical health not elsewhere classified
UTAS Author:Ziebell, JM (Dr Jenna Ziebell)
ID Code:101710
Year Published:2012
Web of Science® Times Cited:25
Deposited By:Wicking Dementia Research and Education Centre
Deposited On:2015-07-02
Last Modified:2017-11-06

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