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The presence of cell surface Ca 2+ permeable α-amino-3-hydroxyl-5-methyl-4-isoxazole-propionate (AMPA)/kainate (Ca-A/K) channels on subsets of central neurons influences both normal physiological function and vulnerability to excitotoxicity. Factors that regulate the formation and membrane insertion of Ca-A/K channels, however, are poorly understood. Recently, the cytokine tumor necrosis factor-α...
Initial studies found glutamate injury to murine spinal cultures (14–17 days in vitro) to reflect contributions of both NMDA and AMPA/kainate receptors. Subsequent experiments found the spinal cultures to be more sensitive than cortical cultures to injury from prolonged low level kainate exposures, and, unlike cortical cultures, to be significantly damaged by relatively brief (30–60 min) kainate exposures...
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