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• W2155673708 abstract "Glucocorticoid dyshomeostasis is observed in a proportion of depressed individuals. As a result, glucocorticoid receptor (GR) antagonists are currently being tested as potential anti-depressants. The current study was designed to test the efficacy of mifepristone, a GR antagonist, in mitigating behavioral, neuroendocrine and central nervous system (CNS) responses to an acute stressor. Adult male rats were treated for 5 days with mifepristone (10 mg/kg) and then exposed to the forced swim test (FST). Treatment with mifepristone decreased immobility and increased swimming (but not climbing) behavior in the FST, consistent with anti-depressant action. In addition, mifepristone dampened the ACTH response to FST exposure. In the CNS, mifepristone increased c-Fos expression in all subdivisions of the medial prefrontal cortex (mPFC) and decreased neuronal activity in some subdivisions of the hippocampus including the CA2, CA3, and hilus region of the dentate gyrus in animals exposed to FST. In contrast, mifepristone increased neuronal activity in the ventral subiculum (output region of the hippocampus) and decreased c-Fos expression in the central amygdala (CeA) in animals exposed to FST. These data suggest that anti-depressant efficacy and perhaps HPA dampening properties of RU486 are related to alterations in key limbic circuits mediating CNS stress responses, resulting in enhanced stress inhibition (via the mPFC and ventral subiculum) as well as decreased stress excitation (central amygdala). Overall the data suggest that drugs targeting the glucocorticoid receptor may ameliorate stress dysfunction associated with depressive illness." @default.
• W2155673708 created "2016-06-24" @default.
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• W2155673708 creator A5056855507 @default.
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• W2155673708 date "2010-08-01" @default.
• W2155673708 modified "2023-09-26" @default.
• W2155673708 title "Mifepristone decreases depression-like behavior and modulates neuroendocrine and central hypothalamic–pituitary–adrenocortical axis responsiveness to stress" @default.
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• W2155673708 doi "https://doi.org/10.1016/j.psyneuen.2010.01.011" @default.
• W2155673708 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3934351" @default.
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• W2155673708 hasPublicationYear "2010" @default.
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