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Erschienen in: Neurotoxicity Research 1/2009

01.01.2009

Diabetic Hyperglycemia Aggravates Seizures and Status Epilepticus-induced Hippocampal Damage

verfasst von: Chin-Wei Huang, Juei-Tang Cheng, Jing-Jane Tsai, Sheng-Nan Wu, Chao-Ching Huang

Erschienen in: Neurotoxicity Research | Ausgabe 1/2009

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Abstract

Epileptic seizures in diabetic hyperglycemia (DH) are not uncommon. This study aimed to determine the acute behavioral, pathological, and electrophysiological effects of status epilepticus (SE) on diabetic animals. Adult male Sprague-Dawley rats were first divided into groups with and without streptozotocin (STZ)-induced diabetes, and then into treatment groups given a normal saline (NS) (STZ-only and NS-only) or a lithium-pilocarpine injection to induce status epilepticus (STZ + SE and NS + SE). Seizure susceptibility, severity, and mortality were evaluated. Serial Morris water maze test and hippocampal histopathology results were examined before and 24 h after SE. Tetanic stimulation-induced long-term potentiation (LTP) in a hippocampal slice was recorded in a multi-electrode dish system. We also used a simulation model to evaluate intracellular adenosine triphosphate (ATP) and neuroexcitability. The STZ + SE group had a significantly higher percentage of severe seizures and SE-related death and worse learning and memory performances than the other three groups 24 h after SE. The STZ + SE group, and then the NS + SE group, showed the most severe neuronal loss and mossy fiber sprouting in the hippocampal CA3 area. In addition, LTP was markedly attenuated in the STZ + SE group, and then the NS + SE group. In the simulation, increased intracellular ATP concentration promoted action potential firing. This finding that rats with DH had more brain damage after SE than rats without diabetes suggests the importance of intensively treating hyperglycemia and seizures in diabetic patients with epilepsy.
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Metadaten
Titel
Diabetic Hyperglycemia Aggravates Seizures and Status Epilepticus-induced Hippocampal Damage
verfasst von
Chin-Wei Huang
Juei-Tang Cheng
Jing-Jane Tsai
Sheng-Nan Wu
Chao-Ching Huang
Publikationsdatum
01.01.2009
Verlag
Springer-Verlag
Erschienen in
Neurotoxicity Research / Ausgabe 1/2009
Print ISSN: 1029-8428
Elektronische ISSN: 1476-3524
DOI
https://doi.org/10.1007/s12640-009-9008-2

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