eCite Digital Repository

The microtubule-modulating drug Epothilone D alters dendritic spine morphology in a mouse model of mild traumatic brain injury

Citation

Chuckowree, JA and Zhu, Z and Brizuela, M and Lee, KM and Blizzard, CA and Dickson, TC, The microtubule-modulating drug Epothilone D alters dendritic spine morphology in a mouse model of mild traumatic brain injury, Frontiers in Cellular Neuroscience, 12 Article 223. ISSN 1662-5102 (2018) [Refereed Article]


Preview
PDF
976Kb
  

Copyright Statement

Copyright 2018 The Authors Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/

DOI: doi:10.3389/fncel.2018.00223

Abstract

Microtubule dynamics underpin a plethora of roles involved in the intricate development, structure, function, and maintenance of the central nervous system. Within the injured brain, microtubules are vulnerable to misalignment and dissolution in neurons and have been implicated in injury-induced glial responses and adaptive neuroplasticity in the aftermath of injury. Unfortunately, there is a current lack of therapeutic options for treating traumatic brain injury (TBI). Thus, using a clinically relevant model of mild TBI, lateral fluid percussion injury (FPI) in adult male Thy1-YFPH mice, we investigated the potential therapeutic effects of the brain-penetrant microtubule-stabilizing agent, epothilone D. At 7 days following a single mild lateral FPI the ipsilateral hemisphere was characterized by mild astroglial activation and a stereotypical and widespread pattern of axonal damage in the internal and external capsule white matter tracts. These alterations occurred in the absence of other overt signs of trauma: there were no alterations in cortical thickness or in the number of cortical projection neurons, axons or dendrites expressing YFP. Interestingly, a single low dose of epothilone D administered immediately following FPI (and sham-operation) caused significant alterations in the dendritic spines of layer 5 cortical projection neurons, while the astroglial response and axonal pathology were unaffected. Specifically, spine length was significantly decreased, whereas the density of mushroom spines was significantly increased following epothilone D treatment. Together, these findings have implications for the use of microtubule stabilizing agents in manipulating injury-induced synaptic plasticity and indicate that further study into the viability of microtubule stabilization as a therapeutic strategy in combating TBI is warranted.

Item Details

Item Type:Refereed Article
Keywords:traumatic brain injury, fluid percussion injury, neuroplasticity, microtubule stabilization, epothilone D, dendritic spine, cortical projection neuron, mushroom spine
Research Division:Medical and Health Sciences
Research Group:Neurosciences
Research Field:Neurology and Neuromuscular Diseases
Objective Division:Health
Objective Group:Clinical Health (Organs, Diseases and Abnormal Conditions)
Objective Field:Nervous System and Disorders
Author:Chuckowree, JA (Dr Jyoti Chuckowree)
Author:Zhu, Z (Mr Zhendan Zhu)
Author:Brizuela, M (Mrs Mariana Brizuela)
Author:Lee, KM (Miss Clara Lee)
Author:Blizzard, CA (Dr Catherine Blizzard)
Author:Dickson, TC (Professor Tracey Dickson)
ID Code:128145
Year Published:2018
Deposited By:Menzies Institute for Medical Research
Deposited On:2018-09-05
Last Modified:2018-10-04
Downloads:6 View Download Statistics

Repository Staff Only: item control page