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The AMPA receptor subunit GluR2 is downregulated in neurons following a wide range of neurological insults. Here we report that suppression of GluR2 gene promoter activity is associated with kainate (KA)-induced downregulation of GluR2 subunit levels in primary cultured cortical neurons. RT-PCR and Northern blotting showed a significant decrease in GluR2 mRNA in cultured neurons after KA exposure...
In the present study, the molecular mechanisms underlying kainate-induced neurotoxicity were characterized in cultured rat hippocampal neurons. Long-term exposure to kainate caused typically apoptotic cell death, which was accompanied by the accumulation of calcium, marked down-regulation of GluR2 subunit, and the activation of calpain and caspase-3. All these alterations were prevented by alpha-amino-3-hydroxy-5-methylisoxazole-4-proprionic...
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