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Santangeli S, Sills GJ, Stone TW, Brodie MJ: Differential effects of remacemide and desglycinyl-remacemide on epileptiform burst firing in the rat hippocampal slice. Neurosci Lett. 2002 Mar 15;321(1-2):33-6.
Remacemide is a potential anticonvulsant drug with an active metabolite, desglycinyl-remacemide (DGR). Both moieties have been reported to block neuronal Na (+) channels and the N-methyl-D-aspartate (NMDA) subtype of glutamate receptor. The effects of remacemide and DGR on zero Mg (2+)/4-aminopyridine-induced epileptiform discharges were investigated in the rat hippocampal slice preparation and compared with carbamazepine (CBZ), a prototypic Na (+) channel blocker, and AR-R15896AR, a putative NMDA channel blocker. Remacemide (0-100 microM) was without significant effect, while DGR, CBZ and AR-R15896AR all decreased burst frequency in a concentration (0-100 microM) dependent manner. These findings suggest that remacemide is not sufficiently potent at the Na (+) channel or NMDA receptor to attenuate epileptiform activity in this model and that the anticonvulsant effects of the drug may be mediated by DGR. |
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