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• W2022693408 abstract "Traumatic brain injury (TBI) is one of the most acute degenerative pathologies in the central nervous system, and in vivo indices enabling an assessment of TBI on a mechanistic basis have yet to be established. The aim of this work was to pursue neuroinflammatory changes and their link to functional disruptions of traumatically-damaged neurons in a rat model of TBI by longitudinal positron emission tomographic (PET) assays. TBI was induced in the unilateral frontal cortex of craniotomied rats according to a lateral fluid percussion brain injury protocol. The use of [18F]fluoroethyl-DAA1106 as a PET tracer for translocator protein (TSPO) permitted demonstration of the inflammatory response to the injury, peaking at 1 week after impact. This alteration was parallel to metabolic deficits assessed by PET with [18F]fluorodeoxyglucose, but the difference in TSPO levels between impacted and non-impacted frontal cortices was more than threefold of the interlateral metabolic difference, indicating superiority of TSPO imaging for sensitive detection of post-traumatic pathologies. Comparative PET, autoradiographic. and immunohistochemical investigations illustrated the primary contribution of hypertrophic microglia and macrophages to acute TSPO signals in the vicinity of the impact. Astrocytes also formed a TSPO-positive glial scar encompassing necrotic inflammation, and were clustered with PET-detectable TSPO signals in the bilateral external and internal capsules at late stages, putatively reacting with diffuse axonal injury. These observations support the applicability of TSPO-PET as an imaging-based preclinical and clinical biomarker assay in TBI, and indicate its potential capability to clarify aggressive and protective roles of glial responses to injury when combined with emerging anti-inflammatory and immunomodulatory treatments." @default.
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• W2022693408 date "2010-08-01" @default.
• W2022693408 modified "2023-10-14" @default.
• W2022693408 title "Glial Cell–Mediated Deterioration and Repair of the Nervous System after Traumatic Brain Injury in a Rat Model as Assessed by Positron Emission Tomography" @default.
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• W2022693408 doi "https://doi.org/10.1089/neu.2009.1196" @default.
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