A mouse model of blast-induced mild traumatic brain injury

Vardit Rubovitch, Meital Ten-Bosch, Ofer Zohar, Catherine R. Harrison, Catherine Tempel-Brami, Elliot Stein, Barry J. Hoffer, Carey D. Balaban, Shaul Schreiber, Wen Ta Chiu, Chaim Gideon Pick

研究成果: 雜誌貢獻文章同行評審

131 引文 斯高帕斯(Scopus)

摘要

Improvised explosive devices (IEDs) are one of the main causes for casualties among civilians and military personnel in the present war against terror. Mild traumatic brain injury from IEDs induces various degrees of cognitive, emotional and behavioral disturbances but knowledge of the exact brain pathophysiology following exposure to blast is poorly understood. The study was aimed at establishing a murine model for a mild BI-TBI that isolates low-level blast pressure effects to the brain without systemic injuries. An open-field explosives detonation was used to replicate, as closely as possible, low-level blast trauma in the battlefield or at a terror-attack site. No alterations in basic neurological assessment or brain gross pathology were found acutely in the blast-exposed mice. At 7. days post blast, cognitive and behavioral tests revealed significantly decreased performance at both 4 and 7. m distance from the blast (5.5 and 2.5. PSI, respectively). At 30. days post-blast, clear differences were found in animals at both distances in the object recognition test, and in the 7. m group in the Y maze test. Using MRI, T1 weighted images showed an increased BBB permeability 1. month post-blast. DTI analysis showed an increase in fractional anisotropy (FA) and a decrease in radial diffusivity. These changes correlated with sites of up-regulation of manganese superoxide dismutase 2 in neurons and CXC-motif chemokine receptor 3 around blood vessels in fiber tracts. These results may represent brain axonal and myelin abnormalities. Cellular and biochemical studies are underway in order to further correlate the blast-induced cognitive and behavioral changes and to identify possible underlying mechanisms that may help develop treatment- and neuroprotective modalities.

原文英語
頁(從 - 到)280-289
頁數10
期刊Experimental Neurology
232
發行號2
DOIs
出版狀態已發佈 - 十二月 2011

ASJC Scopus subject areas

  • Neurology
  • Developmental Neuroscience

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