Abstract | BACKGROUND AND PURPOSE: EXPERIMENTAL APPROACH: Effects of S-Lic on in vitro physiological and pathological hippocampal neuronal activity in slices from mice carrying a heterozygous deletion of Kcnq2 (Kcnq2+/- ) and Kcnq2+/+ mice were investigated. ESL in vivo efficacy was investigated in the 6-Hz psychomotor seizure model in both Kcnq2+/- and Kcnq2+/+ mice. KEY RESULTS: S-Lic increased the amplitude and decreased the incidence of physiological sharp wave-ripples in a concentration-dependent manner and slightly decreased gamma oscillations frequency. 4-Aminopyridine-evoked seizure-like events were blocked at high S-Lic concentrations and substantially reduced in incidence at lower concentrations. These results were not different in Kcnq2+/+ and Kcnq2+/- mice, although the EC50 estimation implicated higher efficacy in Kcnq2+/- animals. In vivo, Kcnq2+/- mice had a lower seizure threshold than Kcnq2+/+ mice. In both genotypes, ESL dose-dependently displayed protection against seizures. CONCLUSIONS AND IMPLICATIONS: S-Lic slightly modulates hippocampal oscillations and blocks epileptic activity in vitro and in vivo. Our results suggest that the increased excitability in Kcnq2+/- mice is effectively targeted by S-Lic high concentrations, presumably by blocking diverse sodium channel subtypes.
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Authors | Laura Monni, Larissa Kraus, Matthias Dipper-Wawra, Patricio Soares-da-Silva, Nikolaus Maier, Dietmar Schmitz, Martin Holtkamp, Pawel Fidzinski |
Journal | British journal of pharmacology
(Br J Pharmacol)
Vol. 179
Issue 1
Pg. 84-102
(01 2022)
ISSN: 1476-5381 [Electronic] England |
PMID | 34605012
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Copyright | © 2021 The Authors. British Journal of Pharmacology published by John Wiley & Sons Ltd on behalf of British Pharmacological Society. |
Chemical References |
- Anticonvulsants
- Dibenzazepines
- KCNQ2 Potassium Channel
- eslicarbazepine acetate
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Topics |
- Animals
- Anticonvulsants
(pharmacology, therapeutic use)
- Dibenzazepines
- Epilepsy
(drug therapy)
- Epilepsy, Temporal Lobe
(drug therapy)
- KCNQ2 Potassium Channel
(genetics, metabolism)
- Mice
- Seizures
(drug therapy)
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