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Published on: December 22, 2016
Valproate and delta-sleep peptide display high efficacy against metaphit-induced audiogenic seizure in rats
O Stanojlović1, D Hrncić, D Zivanović
1Department of Physiology, School of Medicine, University of Belgrade, Visegradska 26/II, 11000 Belgrade, Serbia maxol@eunet.yu
Abstract:
The effects of valproate (VPA) and delta sleep-inducing peptide (DSIP) on metaphit-induced generalized, audiogenic seizure in adult rat males were compared. The animals were i.p. injected with: (1) Saline; (2) metaphit (mp, 10 mg kg(-1)); 3. metaphit (10 mg kg(-1)) and 8 h later with DSIP (0.1, 0.2, 0.4 or 1.0 mg kg(-1)), 4. metaphit (10 mg kg(-1)) and 8 h later with VPA (50, 75 or 100 mg kg(-1)); 5. DSIP alone (1.0 mg kg(-1)) and 6. VPA, alone (100 mg kg(-1)). The rats were exposed to sound stimulation at hourly intervals and the behavior and EEG were analyzed. The EEG signals in metaphit rats appeared as a sleep-like pattern and spike-wave complexes with increased power spectra. Valproate and DSIP reduced the incidence of seizure and prolonged duration of latency in a dose-dependent manner. ED50 of valproate in the 1st hour after administration was 63.19 mg kg(-1) and that of DSIP 3.19 mg kg(-1) four hours after injection. This suggests that VPA, reached a peak of action immediately after the application, while DSIP had a prolonged action, mildly reducing, but not abolishing metaphit seizure. None of the applied VPA and DSIP doses eliminated the metaphit-provoked EEG signs of epileptiform activity.
Insights
Valproate (VPA) and delta sleep-inducing peptide (DSIP) both reduced metaphit-induced seizures in rats. VPA acted quickly, while DSIP provided a longer-lasting, milder effect.
Area of Science:
- Neuroscience
- Pharmacology
Background:
- Generalized seizures can be induced by metaphit, a chemical convulsant.
- Valproate (VPA) and delta sleep-inducing peptide (DSIP) are known for their modulatory effects on neuronal activity.
Purpose of the Study:
- To compare the efficacy of VPA and DSIP in mitigating metaphit-induced seizures in male rats.
- To investigate the dose-dependent effects and onset/duration of action for both VPA and DSIP.
Main Methods:
- Adult male rats were administered metaphit to induce seizures.
- VPA or DSIP were administered at various doses 8 hours post-metaphit.
- EEG and behavioral analysis were conducted following sound stimulation to assess seizure activity.
Main Results:
- Both VPA and DSIP dose-dependently reduced seizure incidence and increased latency.
- VPA demonstrated a rapid onset of action, while DSIP exhibited a prolonged, milder effect.
- Neither VPA nor DSIP completely abolished metaphit-induced epileptiform EEG activity.
Conclusions:
- VPA and DSIP show anticonvulsant properties against metaphit-induced seizures.
- The distinct pharmacokinetic profiles of VPA and DSIP influence their therapeutic potential.
- Further research may explore combination therapies or optimized dosing for enhanced seizure control.
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