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- W2050463110 abstract "Dysfunction of GABAergic transmission related to abnormal expression of GABA(A) receptor subunits in specific brain regions underlies some pathological anxiety states. Besides involvement of the benzodiazepine recognition site of GABA(A) receptor in the expression of anxiety-like behaviour, the roles of the β(2)/β(3) subunits are not well characterized. To address this issue, the experimental design of this study utilized the GABAergic compound etifoxine (with a preferential effectiveness after binding to a specific site at β(2)/β(3) subunits) tested in two inbred mouse strains: BALB/cByJ and C57BL/6J mice using three behavioural paradigms (light/dark box, elevated plus maze and restraint stress-induced small intestinal transit inhibition) and the t-butylbicyclophosphorothionate-induced convulsions model. Etifoxine plasma and brain levels and β(2)/β(3) mRNAs and protein expression levels in various brain regions were compared between the two strains. The two mouse strains differed markedly in basal anxiety level. Etifoxine exhibited more pronounced anxiolytic and anticonvulsant effects in the BALB/cByJ mice compared to the C57BL/6J mice. The etifoxine brain/plasma ratios of the two strains were not different. Beta2 subunit mRNA and protein expression levels were around 25 and 10% higher respectively in the anterodorsal nucleus of the thalamus and the CA3 field of hippocampus of BALB/cByJ mice compared to C57BL/6J mice. Beta3 subunit mRNA and protein expression levels did not differ between the two strains. Based on these results, it is suggested that overexpression of GABA(A) receptor β(2) subunit in BALB/cByJ mice relative to C57BL/6j mice contributes to the dysfunction in GABA(A) transmission in regions of brain known to regulate responses to stress. The dysregulated GABA(A) function in BALB/cByJ mice may be corrected by the administration of etifoxine." @default.
- W2050463110 created "2016-06-24" @default.
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- W2050463110 date "2011-06-01" @default.
- W2050463110 modified "2023-10-18" @default.
- W2050463110 title "Differential effects of etifoxine on anxiety-like behaviour and convulsions in BALB/cByJ and C57BL/6J mice: Any relation to overexpression of central GABAA receptor beta2 subunits?" @default.
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- W2050463110 doi "https://doi.org/10.1016/j.euroneuro.2010.09.008" @default.
- W2050463110 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/20943351" @default.
- W2050463110 hasPublicationYear "2011" @default.
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