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- W2032381837 abstract "Abstract Type A receptors for GABA (GABA A receptors) that contain the δ subunit are located predominantly at extrasynaptic sites and are implicated in modulation of neuronal excitability through tonic inhibition. We have examined the effects of chronic exposure to and subsequent withdrawal of progesterone or the progesterone metabolite 3α‐hydroxy‐5α‐pregnan‐20‐one (3α,5α‐THPROG) on expression of the δ subunit of GABA A receptors and on receptor function in cultured rat hippocampal neurons. Progesterone treatment for 1 day increased the amounts of both δ subunit mRNA and protein, whereas such treatment for 6 days induced marked decreases in the abundance of both the mRNA and protein. Subsequent progesterone withdrawal up‐regulated expression of the δ subunit, which was significantly increased at 9–12 h after withdrawal. These effects of progesterone were mimicked by 3α,5α‐THPROG and blocked by the 5α‐reductase inhibitor finasteride. They were also accompanied by parallel changes in the function of GABA A receptors in hippocampal neurons. These results show that chronic exposure to and withdrawal of progesterone induce differential effects on both expression of the δ subunit of GABA A receptors and receptor function that are mediated by 3α,5α‐THPROG. They are consistent with the notion that this progesterone metabolite plays a key physiological role in modulation of GABAergic synapses." @default.
- W2032381837 created "2016-06-24" @default.
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- W2032381837 date "2006-07-31" @default.
- W2032381837 modified "2023-10-12" @default.
- W2032381837 title "Changes in expression of the ? subunit of the GABA<sub>A</sub>receptor and in receptor function induced by progesterone exposure and withdrawal" @default.
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- W2032381837 doi "https://doi.org/10.1111/j.1471-4159.2006.04055.x" @default.
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- W2032381837 hasPublicationYear "2006" @default.
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