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EnglishN-valproyl-L-tryptophan (VPA-Tryp), new antiepileptic drug, was tested on CA1 hippocampal epileptiform bursting activity obtained by increasing potassium and lowering calcium and magnesium concentrations in the fluid perfusing rat brain slices. Slices were treated with 0.5, 1 or 2 mM Valproate (VPA) or 0.2, 0.5 or 1 mM VPA-Tryp. Both burst duration and interburst frequency during and after treatment were off-line compared with baseline values. For both parameters, the latency and the length of statistically significant response periods, as well as the magnitude of drug-induced responses were calculated. VPA-Tryp evoked fewer and weaker early excitatory effects than VPA on bursting activity. On the contrary, VPA-Tryp induced powerful and long-lasting inhibitory effects on epileptiform discharge in a significantly higher number of slices than VPA. In fact, greater length and magnitude of VPA-Tryp-induced inhibition on both interburst frequency and burst duration were observed. Furthermore, VPA-Tryp showed antiepileptic activity at lower concentration than VPA and, when testing both drugs at analogue concentrations, VPA-Tryp evoked responses with either shorter latency or greater effect length and magnitude than VPA.
Sardo, P., Rizzo, V., Friscia, S., Carletti, F., DE CARO, V., Scaturro, A., et al. (2012). Inhibitory effects of N-valproyl-L-tryptophan on high potassium, low calcium and low magnesium-induced CA1 hippocampal epileptiform bursting activity in rat brain slices. JOURNAL OF NEURAL TRANSMISSION, 119(11), 1249-1259.
| Data di pubblicazione: | 2012 |
| Titolo: | Inhibitory effects of N-valproyl-L-tryptophan on high potassium, low calcium and low magnesium-induced CA1 hippocampal epileptiform bursting activity in rat brain slices |
| Autori: | |
| Citazione: | Sardo, P., Rizzo, V., Friscia, S., Carletti, F., DE CARO, V., Scaturro, A., et al. (2012). Inhibitory effects of N-valproyl-L-tryptophan on high potassium, low calcium and low magnesium-induced CA1 hippocampal epileptiform bursting activity in rat brain slices. JOURNAL OF NEURAL TRANSMISSION, 119(11), 1249-1259. |
| Rivista: | |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1007/s00702-012-0814-y |
| Abstract: | N-valproyl-L-tryptophan (VPA-Tryp), new antiepileptic drug, was tested on CA1 hippocampal epileptiform bursting activity obtained by increasing potassium and lowering calcium and magnesium concentrations in the fluid perfusing rat brain slices. Slices were treated with 0.5, 1 or 2 mM Valproate (VPA) or 0.2, 0.5 or 1 mM VPA-Tryp. Both burst duration and interburst frequency during and after treatment were off-line compared with baseline values. For both parameters, the latency and the length of statistically significant response periods, as well as the magnitude of drug-induced responses were calculated. VPA-Tryp evoked fewer and weaker early excitatory effects than VPA on bursting activity. On the contrary, VPA-Tryp induced powerful and long-lasting inhibitory effects on epileptiform discharge in a significantly higher number of slices than VPA. In fact, greater length and magnitude of VPA-Tryp-induced inhibition on both interburst frequency and burst duration were observed. Furthermore, VPA-Tryp showed antiepileptic activity at lower concentration than VPA and, when testing both drugs at analogue concentrations, VPA-Tryp evoked responses with either shorter latency or greater effect length and magnitude than VPA. |
| Settore Scientifico Disciplinare: | Settore BIO/09 - Fisiologia Settore CHIM/09 - Farmaceutico Tecnologico Applicativo |
| Appare nelle tipologie: | 1.01 Articolo in rivista |
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http://hdl.handle.net/10447/74288
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