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2016 ; 6
(ä): 28713
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Behavioral, blood, and magnetic resonance imaging biomarkers of experimental mild
traumatic brain injury
#MMPMID27349514
Wright DK
; Trezise J
; Kamnaksh A
; Bekdash R
; Johnston LA
; Ordidge R
; Semple BD
; Gardner AJ
; Stanwell P
; O'Brien TJ
; Agoston DV
; Shultz SR
Sci Rep
2016[Jun]; 6
(ä): 28713
PMID27349514
show ga
Repeated mild traumatic brain injuries (mTBI) may lead to serious neurological
consequences, especially if re-injury occurs within the period of increased
cerebral vulnerability (ICV) triggered by the initial insult. MRI and blood
proteomics might provide objective measures of pathophysiological changes in
mTBI, and indicate when the brain is no longer in a state of ICV. This study
assessed behavioral, MRI, and blood-based markers in a rat model of mTBI. Rats
were given a sham or mild fluid percussion injury (mFPI), and behavioral testing,
MRI, and blood collections were conducted up to 30 days post-injury. There were
cognitive impairments for three days post-mFPI, before normalizing by day 5
post-injury. In contrast, advanced MRI (i.e., tractography) and blood proteomics
(i.e., vascular endothelial growth factor) detected a number of abnormalities,
some of which were still present 30 days post-mFPI. These findings suggest that
MRI and blood proteomics are sensitive measures of the molecular and subtle
structural changes following mTBI. Of particular significance, this study
identified novel tractography measures that are able to detect mTBI and may be
more sensitive than traditional diffusion-tensor measures. Furthermore, the blood
and MRI findings may have important implications in understanding ICV and are
translatable to the clinical setting.