Journal article
Diffusion Magnetic Resonance Imaging Unveils the Spatiotemporal Microstructural Gray Matter Changes following Injury in the Rodent Brain
Journal of Neurotrauma, Vol.36(8), pp.1306-1317
2019
PMID: 30381993
Abstract
Traumatic brain injury (TBI) is associated with gray and white matter alterations in brain tissue. Gray matter alterations are not yet as well studied as those of the white matter counterpart. This work utilized T2-weighted structural imaging, diffusion tensor imaging (DTI), and diffusion kurtosis imaging to unveil the gray matter changes induced in a controlled cortical impact (CCI) mouse model of TBI at 5 h, 1 day, 3 days, 7 days, 14 days, and 30 days post-CCI. A cross-sectional histopathology approach was used to confer validity of the magnetic resonance imaging (MRI) data by performing cresyl violet staining and glial fibrillary acidic protein (GFAP) immunohistochemistry. The results demonstrated a significant increase in lesion volume up to 3 days post-injury followed by a significant decrease in the cavity volume for the period of 1 month. GFAP signals peaked on Day 7 and persisted until Day 30 in both ipsilateral and contralateral hippocampus, ipsilateral cortex, and thalamic areas. An increase in fractional anisotropy (FA) was seen at Day 7 in the pericontusional area but decreased FA in the contralateral cortex, hippocampus, and thalamus. Mean diffusivity (MD) was significantly lower in the pericontusional cortex. Increased MD and decreased mean kurtosis were limited to the injury site on Days 7 to 30 and to the contralateral hippocampus and thalamus on Days 3 and 7. This work is one of the few cross-sectional studies to demonstrate a link between MRI measures and histopathological readings to track gray matter changes in the progression of TBI.
Details
- Title
- Diffusion Magnetic Resonance Imaging Unveils the Spatiotemporal Microstructural Gray Matter Changes following Injury in the Rodent Brain
- Authors
- Neha Soni (Author) - University of QueenslandAbdalla Z Mohamed (Author) - University of QueenslandNyoman Kurniawan (Author) - University of QueenslandKarin Borges (Author) - University of QueenslandFatima A Nasrallah (Author) - University of Queensland
- Publication details
- Journal of Neurotrauma, Vol.36(8), pp.1306-1317
- Publisher
- Mary Ann Liebert, Inc. Publishers
- DOI
- 10.1089/neu.2018.5972
- ISSN
- 1557-9042
- PMID
- 30381993
- Organisation Unit
- Thompson Institute; University of the Sunshine Coast, Queensland
- Language
- English
- Record Identifier
- 99522404702621
- Output Type
- Journal article
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- Web Of Science research areas
- Clinical Neurology
- Critical Care Medicine
- Neurosciences
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Source: InCites