Abstract |
By intravenous administration of group I metabotropic glutamate receptor antagonists at 1 or 2h during pilocarpine induced status epilepticus (PISE), we showed that mGluR1 antagonists AIDA or LY367385 (at dosages ranging from 25 to 200mg/kg), mGluR5 antagonists SIB1757 (at dosages ranging from 25 to 200mg/kg), SIB1893 (from 25 to 100mg/kg), MPEP (from 25 to 100mg/kg) injected at 1 or 2h during PISE were ineffective in controlling status epilepticus (SE). However, when administered at 1h during PISE, MPEP at 200mg/kg, combination of MPEP (200mg/kg) with MK801 (0.1mg/kg) or with MK801 (0.1mg/kg) and diazepam (0.5mg/kg), combination of SIB1893 (200mg/kg) with MK801 (0.1mg/kg) could effectively control behavioral SE, and were neuroprotective. In particular, the combination of MPEP with MK801 and diazepam could stop both behavioral SE and electrical SE (under EEG monitoring) within a few minutes after the administration. HPLC study showed that a high level of MPEP was maintained in the blood and its metabolism rate was slow in experimental mice with PISE. We therefore concluded that the combination of MPEP (200mg/kg) with MK801 (0.1mg/kg) and diazepam (0.5mg/kg) could effectively stop SE and its subsequent neuronal loss in the hippocampus when administered 1h during PISE. It may provide a new approach to effectively control intractable SE.
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Authors | Feng Ru Tang, Peng Min Chen, Yong Cheng Tang, Mui Chiung Tsai, Wei Ling Lee |
Journal | Neuropharmacology
(Neuropharmacology)
Vol. 53
Issue 7
Pg. 821-31
(Dec 2007)
ISSN: 0028-3908 [Print] England |
PMID | 17904168
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Excitatory Amino Acid Antagonists
- GABA Modulators
- Oxazines
- Pyridines
- Pilocarpine
- Nile Blue
- Dizocilpine Maleate
- 6-methyl-2-(phenylethynyl)pyridine
- Diazepam
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Topics |
- Animals
- Behavior, Animal
(drug effects)
- Chromatography, High Pressure Liquid
(methods)
- Diazepam
(therapeutic use)
- Disease Models, Animal
- Dizocilpine Maleate
(therapeutic use)
- Dose-Response Relationship, Drug
- Drug Therapy, Combination
- Electroencephalography
(methods)
- Excitatory Amino Acid Antagonists
(therapeutic use)
- GABA Modulators
(therapeutic use)
- Male
- Mice
- Oxazines
- Pilocarpine
- Pyridines
(blood, therapeutic use)
- Status Epilepticus
(chemically induced, drug therapy, physiopathology)
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