The anxiogenic β -carboline, FG 7142 (20 mg/kg) significantly increased glutamate efflux in the prefrontal cortex of conscious rats as assessed by microdialysis. Pretreatment with the benzodiazepine receptor agonist, diazepam (5 mg/kg), abolished this effect. These findings indicate that anxiogenic compounds produce an effect similar to physical stressors on the outflow of glutamate, and implicate the GABA/benzodiazepine receptor complex in the stress-induced activation of glutamate systems in the prefrontal cortex.
Brain Research – Elsevier
Published: Apr 15, 1996
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