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Imepitoin Shows Benzodiazepine-Like Effects in Models of Anxiety
Odilo Engel1, Aleksandar Masic2, Gary Landsberg2
1Boehringer Ingelheim Vetmedica GmbH, Ingelheim am Rhein, Germany.
Frontiers in Pharmacology
|November 21, 2018
Summary
Imepitoin demonstrates anxiolytic properties in preclinical models and dogs, similar to benzodiazepines but without causing sedation. This suggests potential as a novel anti-anxiety medication.
Area of Science:
- Neuroscience
- Pharmacology
- Veterinary Medicine
Background:
- Imepitoin is an antiepileptic drug acting as a partial agonist at GABAA receptors.
- Existing antiepileptics may have anxiolytic potential.
- Benzodiazepines are effective anxiolytics but cause sedation.
Purpose of the Study:
- To investigate the anxiolytic properties of imepitoin.
- To compare imepitoin's anxiolytic profile with benzodiazepines.
- To assess imepitoin's efficacy and safety in animal models of anxiety.
Main Methods:
- In vitro testing on locus coeruleus neurons.
- Rodent behavioral tests: elevated plus maze, light-dark box, social interaction, Vogel conflict test.
- Canine sound-induced fear model with cortisol level assessment.
Main Results:
- Imepitoin reduced corticotrophin-releasing factor effects on neurons in vitro.
- Imepitoin exhibited anxiolytic-like behavior across rodent models.
- In dogs, imepitoin increased locomotion and reduced cortisol levels during sound-induced fear, unlike dexmedetomidine.
- Anxiolytic doses were not associated with sedation in any model.
Conclusions:
- Imepitoin possesses significant anxiolytic activity.
- Its mechanism and lack of sedation differentiate it from traditional benzodiazepines.
- Imepitoin shows promise as a non-sedating anxiolytic agent.
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