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- W2064796470 abstract "Social isolation of rats immediately after weaning is associated to a reduction in the cerebrocortical and plasma concentrations of progesterone and its metabolites 3alpha,5alpha-TH PROG and 3alpha,5alpha-THDOC. Although we found that the basal plasma concentration of adrenocorticotropic hormone in isolated rats was slightly decreased compared with that in group-housed animals no other significant changes were found in the steroidogenic machinery (peripheral benzodiazepine receptors, steroidogenic regulatory protein (StAR)). However, the functional response of the hypothalamic-pituitary-adrenal axis HPA axis to an acute stressful stimulus (foot shock), or to an acute injection of ethanol or isoniazid is markedly increased in isolated rats. Behavioral studies have also indicated that the ability of ethanol to inhibit isoniazid-induced convulsions is greater in isolated rats than in group-housed animals and this effect of isolation is prevented by treatment with the 5alpha-reductase inhibitor finasteride. Social isolation modified the effects of ethanol on the amounts of StAR mRNA and protein in the brain suggesting an alteration in the mechanism of cholesterol transport in mitochondria. Moreover, the amounts of the alpha4 and delta subunits of the GABA(A) receptor in the hippocampus were increased in isolated rats, and these effects were accompanied by an increase in GABA(A) receptor-mediated tonic inhibitory currents in granule cells of the dentate gyrus. Ethanol also increased the amplitude of GABA(A) receptor-mediated miniature inhibitory postsynaptic currents (mIPSC) recorded from CA1 pyramidal neurons with a greater potency in hippocampal slices prepared from socially isolated rats than in those from group-housed, an effect inhibited by finasteride." @default.
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- W2064796470 date "2007-01-01" @default.
- W2064796470 modified "2023-09-27" @default.
- W2064796470 title "Social isolation stress and neuroactive steroids" @default.
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- W2064796470 doi "https://doi.org/10.1016/j.euroneuro.2006.03.004" @default.
- W2064796470 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/16626946" @default.
- W2064796470 hasPublicationYear "2007" @default.
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