Functional role for redox in the epileptogenesis: molecular regulation of glutamate in the hippocampus of FeCl3-induced limbic epilepsy model
| Autor: | L. James Willmore, Akira Nakajima, Yuto Ueda, Keiko Nagatomo, Taku Doi |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Male
Microdialysis Glutamic Acid Hippocampus Hippocampal formation Ferric Compounds Epileptogenesis Statistics Nonparametric Epilepsy Chlorides medicine Animals GABA transporter Rats Wistar Behavior Animal biology Chemistry General Neuroscience Glutamate receptor Transporter medicine.disease Rats Cell biology Excitatory Amino Acid Transporter 1 Disease Models Animal Excitatory Amino Acid Transporter 2 Gene Expression Regulation biology.protein Oxidation-Reduction Neuroscience |
| Zdroj: | Experimental Brain Research. 181:571-577 |
| ISSN: | 1432-1106 0014-4819 |
| DOI: | 10.1007/s00221-007-0954-8 |
| Popis: | We used western blotting to measure the quantity of glutamate and gamma-aminobutyric acid (GABA) transporters proteins within hippocampal tissue obtained from rats who had undergone epileptogenesis. Chronic seizures were induced by amygdalar injection of FeCl(3). We found that the glial glutamate transporters GLAST and GLT-1 were down-regulated at 60 days after initiation of chronic and recurrent seizures. However, the neuronal glutamate transporter EAAC-1 and the GABA transporter GAT-3 were increased. We performed in vivo microdialysis in freely moving animals to estimate in vivo redox state. We found that the hippocampal tissues were oxidized, resulting in even further impairment of glutamate transport. Our data show that epileptogenesis in rats resulting in chronic and recurrent seizures is associated with collapse of glutamate regulation caused by both the molecular down-regulation of glial glutamate transporters combined with the functional failure due to oxidation. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink