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Epilepsy Res. 2010 May;89(2-3):254-60. doi: 10.1016/j.eplepsyres.2010.01.009. Epub 2010 Feb 20.

Ganaxolone suppression of behavioral and electrographic seizures in the mouse amygdala kindling model.

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  • 1Department of Neuroscience and Experimental Therapeutics, College of Medicine, Texas A&M System Health Science Center, College Station, TX 77843-1114, USA. reddy@medicine.tamhsc.edu

Abstract

Ganaxolone (3alpha-hydroxy-3beta-methyl-5alpha-pregnan-20-one), a synthetic analog of the endogenous neurosteroid allopregnanolone and a positive allosteric modulator of GABAA receptors, may represent a new treatment approach for epilepsy. Here we demonstrate that pretreatment with ganaxolone (1.25-20 mg/kg, s.c.) causes a dose-dependent suppression of behavioral and electrographic seizures in fully amygdala-kindled female mice, with nearly complete seizure protection at the highest dose tested. The ED50 for suppression of behavioral seizures was 6.6 mg/kg. The seizure suppression produced by ganaxolone was comparable to that of clonazepam (ED50, 0.1 mg/kg, s.c.). To the extent that amygdala kindling represents a model of mesial temporal lobe epilepsy, this study supports the utility of ganaxolone in the treatment of patients with temporal lobe seizures.

Copyright 2010 Elsevier B.V. All rights reserved.

PMID:
20172694
[PubMed - indexed for MEDLINE]
PMCID:
PMC2854307
Free PMC Article

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