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Sökning: WFRF:(Thompson Carrie A.) > (2006-2009)

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  • Thompson, Hilaire J., et al. (författare)
  • Tissue sparing and functional recovery following experimental traumatic brain injury is provided by treatment with an anti-myelin-associated glycoprotein antibody
  • 2006
  • Ingår i: European Journal of Neuroscience. - : Wiley. - 0953-816X .- 1460-9568. ; 24:11, s. 3063-3072
  • Tidskriftsartikel (refereegranskat)abstract
    • Axonal injury is a hallmark of traumatic brain injury (TBI) and is associated with a poor clinical outcome. Following central nervous system injury, axons regenerate poorly, in part due to the presence of molecules associated with myelin that inhibit axonal outgrowth, including myelin-associated glycoprotein (MAG). The involvement of MAG in neurobehavioral deficits and tissue loss following experimental TBI remains unexplored and was evaluated in the current study using an MAG-specific monoclonal antibody (mAb). Anesthetized rats (n = 102) were subjected to either lateral fluid percussion brain injury (n = 59) or sham injury (n = 43). In surviving animals, beginning at 1 h post-injury, 8.64 mu g anti-MAG mAb (n = 33 injured, n = 21 sham) or control IgG (n = 26 injured, n = 22 sham) was infused intracerebroventricularly for 72 h. One group of these rats (n = 14 sham, n = 11 injured) was killed at 72 h post-injury for verification of drug diffusion and MAG immunohistochemistry. All other animals were evaluated up to 8 weeks post-injury using tests for neurologic motor, sensory and cognitive function. Hemispheric tissue loss was also evaluated at 8 weeks post-injury. At 72 h post-injury, increased immunoreactivity for MAG was seen in the ipsilateral cortex, thalamus and hippocampus of brain-injured animals, and anti-MAG mAb was detectable in the hippocampus, fimbria and ventricles. Brain-injured animals receiving anti-MAG mAb showed significantly improved recovery of sensorimotor function at 6 and 8 weeks (P < 0.01) post-injury when compared with brain-injured IgG-treated animals. Additionally, at 8 weeks post-injury, the anti-MAG mAb-treated brain-injured animals demonstrated significantly improved cognitive function and reduced hemispheric tissue loss (P < 0.05) when compared with their brain-injured controls. These results indicate that MAG may contribute to the pathophysiology of experimental TBI and treatment strategies that target MAG may be suitable for further evaluation.
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