Abstract |
The anticonvulsant activity of the selective group II metabotropic glutamate receptor (mGlu) agonist 2R,4R-4-aminopyrrolidine-2,4-dicarboxylate (2R,4R-APDC) has been evaluated in chemoconvulsant and sound-induced models of epileptic seizures in DBA/2 mice. 2R,4R-APDC (> or =10 nmol, intracerebroventricularly (i.c.v.), -15 min) transiently reduced sound-induced seizure activity including clonic seizures to 40% of vehicle at 20 nmol (i.c.v.) and 30% of vehicle at 100 mg/kg (intraperitoneally (i.p.), -15 min). 2R,4R-APDC inhibited clonic seizures induced by the group III mGlu antagonist (R,S)- alpha-methylserine-O- phosphate (2.5 micromol, i.c.v.) when co-injected at 20-40 nmol and inhibited limbic seizure activity induced by the mGlu(1/5) agonist (R,S)-3,5-dihydroxyphenylglycine (1.5 micromol, i.c.v.) when co-injected at 10-40 nmol. A reversal of the anticonvulsant activity of 2R,4R-APDC was observed at (>20 nmol) in each of the chemoconvulsant and sound-induced models of epileptic seizures. 2R,4R-APDC (0.1-1 micromol, i.c.v.) induced stimulus-independent, rapid and dose-dependent clonic seizures. Selective mGlu(2/3) agonists represent a novel class of potential anti-epileptic drugs, however due to the proconvulsant activity observed here, 2R,4R-APDC is obviously limited in this regard.
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Authors | R X Moldrich, A Talebi, P M Beart, A G Chapman, B S Meldrum |
Journal | Neuroscience letters
(Neurosci Lett)
Vol. 299
Issue 1-2
Pg. 125-9
(Feb 16 2001)
ISSN: 0304-3940 [Print] Ireland |
PMID | 11166954
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- 4-aminopyrrolidine-2,4-dicarboxylic acid
- Anticonvulsants
- Convulsants
- Excitatory Amino Acid Agonists
- Receptors, Metabotropic Glutamate
- metabotropic glutamate receptor 2
- metabotropic glutamate receptor 3
- Proline
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Topics |
- Animals
- Anticonvulsants
(pharmacology)
- Central Nervous System
(drug effects, metabolism, physiopathology)
- Convulsants
(pharmacology)
- Dose-Response Relationship, Drug
- Epilepsy
(chemically induced, drug therapy, physiopathology)
- Excitatory Amino Acid Agonists
(pharmacology)
- Female
- Male
- Mice
- Mice, Inbred DBA
- Proline
(analogs & derivatives, pharmacology)
- Receptors, Metabotropic Glutamate
(agonists, antagonists & inhibitors, metabolism)
- Sound
(adverse effects)
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