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We investigated in vivo in rats whether sufficient glutamate is released following spinal cord injury (SCI) to kill oligodendrocytes. Microdialysis sampling was used to establish the level of glutamate released (550 +/- 80 μM) in the white matter during SCI. This glutamate concentration was administered into the spinal cords of other rats and the densities of oligodendrocytes remaining 24 and 72 h...
Release of amino acids, particularly the neurotoxin glutamate, in and around the site of an experimental spinal cord injury was characterized over time by microdialysis. Increases in amino acid concentrations caused by injury decline steeply and then slowly over distance from the impact area, becoming undetectable beyond about 5 mm from the injury epicenter. Diffusion profiles determined in the cord...
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