Anticonvulsant effect of vigabatrin(.-vinyl GABA)
نویسندگان
چکیده
منابع مشابه
Effect of vigabatrin (gamma-vinyl GABA) on amino acid levels in CSF of epileptic patients.
Vigabatrin (gamma-vinyl GABA) is a new anticonvulsive drug that irreversibly inhibits the activity of GABA transaminase. The effect of vigabatrin on neurotransmission-related amino acids in CSF of 28 epileptic patients was studied and the relationship between the amino acid pattern and clinical response during 7 months of administration of vigabatrin. Of this study population, 46% had more than...
متن کاملVigabatrin, the GABA-transaminase inhibitor, damages cone photoreceptors in rats.
Epileptic patients experienced an irreversible loss of their peripheral visual field upon treatment with vigabatrin (gamma-vinyl GABA), an inhibitor of the GABA degrading enzyme, GABA transaminase. Subsequently, central visual function was reported to also be irreversibly altered. This visual loss is associated with a decrease in the electroretinogram measurement localizing the deficit to the r...
متن کاملVigabatrin induces tonic inhibition via GABA transporter reversal without increasing vesicular GABA release.
Two forms of GABAergic inhibition coexist: fast synaptic neurotransmission and tonic activation of GABA receptors due to ambient GABA. The mechanisms regulating ambient GABA have not been well defined. Here we examined the role of the GABA transporter in the increase in ambient [GABA] induced by the anticonvulsant vigabatrin. Pretreatment of cultured rat hippocampal neurons with vigabatrin (100...
متن کاملVigabatrin and tiagabine are pharmacologically different drugs. A pre-clinical study
In light of theirclosely related mechanisms of action, and preliminary clinical evidence suggesting that they possess similar efficacies, it has been anecdotally suggested that vigabatrin and tiagabine may prove to be therapeutically indistinguishable. As a result, we have conducted a preclinical comparison of their anticonvulsant profile and mechanism of action. Pentylenetetrazol and maximal e...
متن کاملGABA transaminase inhibition induces spontaneous and enhances depolarization-evoked GABA efflux via reversal of the GABA transporter.
The GABA transporter can reverse with depolarization, causing nonvesicular GABA release. However, this is thought to occur only under pathological conditions. Patch-clamp recordings were made from rat hippocampal neurons in primary cell cultures. Inhibition of GABA transaminase with the anticonvulsant gamma-vinyl GABA (vigabatrin; 0.05-100 microm) resulted in a large leak current that was block...
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ژورنال
عنوان ژورنال: Japanese Journal of Pharmacology
سال: 1988
ISSN: 0021-5198
DOI: 10.1016/s0021-5198(19)57088-3