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  • Title: [Effects of fluoxetine and its complexes with glycyrrizhinic acid on behavior and brain monoamine levels in rats].
    Author: Shishkina GT, Dygalo NN, Iudina AM, Kalinina TS, Tolstikova TG, Sorokina IV, Kovalenko IL, Anikina LV.
    Journal: Zh Vyssh Nerv Deiat Im I P Pavlova; 2005; 55(2):207-12. PubMed ID: 15895861.
    Abstract:
    Effects of serotonin uptake inhibitor fluoxetine (F) and it's complexes with glycyrrizhinic acid (GA) in molar proportions 1GA : 1F (FGA-1) and 4GA : 1F (FGA-4) on rat behavior in elevated plus-maze and brain monoamine concentrations were studied. Drugs (25 mg/kg) were administered per os 1 h before investigations. F-treated rats showed increased anxiety and reduced locomotor activity, whereas FGA-1 and FGA-4 had no effects on the behaviors. None of the compounds modified brain tissue serotonin content, but all of them decreased the level of its metabolite 5-hydroxyindole-3-acetic acid level in the hypothalamus, and FGA-4 also decreased it in the cortex. Noradrenaline levels were increased in the hypothalamus of rats treated with F in both combinations with GA. In the striatum, F increased dopamine and its metabolite DOPAC levels, but their ratio (an indicator of the neurotransmitter turnover) was not altered by this drug. Unlike F, FGA-1 significantly activated dopamine turnover in the striatum. The data obtained suggested that application of F in complexes with GA significantly modified the drug behavioral effects and these alterations may be related to specific effects of the pure compound and its complexes on the functions of the brain monoaminergic systems that regulate investigated behavior.
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