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- W2034713083 abstract "Corticosterone is known to suppress levels of 5-HT1A receptor mRNA in rat hippocampus. We describe hippocampal 5-HT1A receptor mRNA regulation in mice that have a targeted disruption of the glucocorticoid receptor gene. 5-HT1A receptor mRNA levels as well as binding of [3H]8-OH-DPAT, were measured in the hippocampus of heterozygous and homozygous GR-deficient mice and in wild-type control mice. The effect of adrenalectomy in wild-type mice and heterozygous knockouts was also studied. We hypothesized that if the glucocorticoid receptor is important as a mediator of the suppressive effect of corticosterone, this would be revealed by changed (enhanced) expression of 5-HT1A receptor mRNA in mice with a genetically changed glucocorticoid receptor status. It was found that 5-HT1A receptor mRNA levels and 5-HT1A receptor binding were not different in GR-deficient mice. The 5-HT1A receptor mRNA levels were responsive to corticosterone, as adrenalectomy led to increased levels of hippocampal 5-HT1A receptor mRNA both in wild-type as in heterozygous knockout mice. These increases were paralleled by small but statistically significant changes in [3H]8-OH-DPAT binding. These results support a suppressive control of B over 5-HT1A receptor expression in the hippocampus of the mouse, which is predominantly mediated via the mineralocorticoid receptor. The data indicates that no interaction between the two corticosteroid receptors is required for this effect of corticosterone, and that mineralocorticoid receptor-mediated suppression of gene expression can take place in the complete absence of glucocorticoid receptor." @default.
- W2034713083 created "2016-06-24" @default.
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- W2034713083 date "1997-06-01" @default.
- W2034713083 modified "2023-10-16" @default.
- W2034713083 title "Regulation of hippocampal 5-HT1A receptor mRNA and binding in transgenic mice with a targeted disruption of the glucocorticoid receptor" @default.
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- W2034713083 doi "https://doi.org/10.1016/s0169-328x(97)00002-8" @default.
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