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Time-course and dose-response relationships of imperatorin in the mouse maximal electroshock seizure threshold model
Jarogniew J Luszczki1, Kazimierz Glowniak, Stanislaw J Czuczwar
1Department of Pathophysiology, Medical University of Lublin, Jaczewskiego 8, PL 20-090 Lublin, Poland. jluszczki@yahoo.com
Abstract:
This study was designed to evaluate the anticonvulsant effects of imperatorin (a furanocoumarin isolated from fruits of Angelica archangelica) in the mouse maximal electroshock seizure threshold model. The threshold for electroconvulsions in mice was determined at several times: 15, 30, 60 and 120 min after i.p. administration of imperatorin at increasing doses of 10, 20, 30, 40, 50 and 100 mg/kg. The evaluation of time-course relationship for imperatorin in the maximal electroshock seizure threshold test revealed that the agent produced its maximum antielectroshock action at 30 min after its i.p. administration. In this case, imperatorin at doses of 50 and 100 mg/kg significantly raised the threshold for electroconvulsions in mice by 38 and 68% (P<0.05 and P<0.001), respectively. The antiseizure effects produced by imperatorin at 15, 60 and 120 min after its systemic (i.p.) administration were less expressed than those observed for imperatorin injected 30 min before the maximal electroshock seizure threshold test. Based on this study, one can conclude that imperatorin produces the anticonvulsant effect in the maximal electroshock seizure threshold test in a dose-dependent manner.
Insights
Imperatorin, a compound from Angelica archangelica, demonstrates significant anticonvulsant effects in mice. Its maximal seizure-protective action occurs 30 minutes post-administration, showing a dose-dependent response.
Area of Science:
- Pharmacology
- Neuroscience
- Natural Products Chemistry
Background:
- Epilepsy is a neurological disorder characterized by recurrent seizures.
- Furanocoumarins are natural compounds with diverse biological activities.
- Imperatorin is a furanocoumarin found in Angelica archangelica fruits.
Purpose of the Study:
- To evaluate the anticonvulsant properties of imperatorin.
- To determine the dose-response and time-course of imperatorin's effect.
- To assess imperatorin's efficacy in a mouse maximal electroshock seizure model.
Main Methods:
- Administration of varying doses of imperatorin (10-100 mg/kg) via intraperitoneal injection.
- Measurement of the electroshock seizure threshold at 15, 30, 60, and 120 minutes post-administration.
- Utilizing the mouse maximal electroshock seizure threshold test.
Main Results:
- Imperatorin significantly increased the seizure threshold in a dose-dependent manner.
- Maximum anticonvulsant effect was observed 30 minutes after imperatorin administration.
- Doses of 50 and 100 mg/kg imperatorin elevated the threshold by 38% and 68%, respectively.
Conclusions:
- Imperatorin exhibits significant anticonvulsant effects in the mouse maximal electroshock seizure model.
- The anticonvulsant activity of imperatorin is dose-dependent.
- Optimal seizure protection is achieved when imperatorin is administered 30 minutes prior to electroshock stimulation.
