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- W1965774807 endingPage "98" @default.
- W1965774807 startingPage "85" @default.
- W1965774807 abstract "The pharmacokinetics and behavioral effects of isoallopregnanolone (3β-hydoxy-5α-pregnan-20-one) in women are not known. Allopregnanolone (3α-hydoxy-5α-pregnan-20-one) is a well-known neurosteroid, acting via the GABAA receptor in the human brain. The naturally occurring progesterone metabolite isoallopregnanolone is the 3β-stereoisomer of allopregnanolone. Prior studies have concluded that isoallopregnanolone has no effect on the GABAA receptor. However, an antagonistic effect of isoallopregnanolone to allopregnanolone on the GABAA receptor has been shown in animal and in vitro studies. The purpose of this study was to evaluate the pharmacokinetics and behavioral effects of isoallopregnanolone in humans. Six healthy women were given three increasing doses of isoallopregnanolone intravenously in the follicular phase. Repeated blood samples for analyses of isoallopregnanolone and allopregnanolone concentrations were drawn. Saccadic eye movement variables, self-rated sedation, and mood rating scales were used during the test day. A Likert scale for prospective symptoms was used to measure daily fluctuations during the ongoing menstrual cycle. Exogenously administered isoallopregnanolone produced a dose-dependent increase in the serum concentration of isoallopregnanolone. In parallel, there was also a rise in the allopregnanolone concentration. There was a decrease in saccadic eye movement variables, but no effect was found on self-rated sedation or mood and no changes were seen in prospective symptoms during the menstrual cycle. After administration of isoallopregnanolone at a cumulative dose of 0.20 mg/kg, no adverse effects were observed. There is a metabolism of isoallopregnanolone to allopregnanolone, most likely explaining the effects on the saccadic eye movements." @default.
- W1965774807 created "2016-06-24" @default.
- W1965774807 creator A5000155113 @default.
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- W1965774807 creator A5053480244 @default.
- W1965774807 creator A5065815798 @default.
- W1965774807 creator A5072230774 @default.
- W1965774807 date "2008-10-24" @default.
- W1965774807 modified "2023-10-18" @default.
- W1965774807 title "Studies of pharmacokinetic and pharmacodynamic properties of isoallopregnanolone in healthy women" @default.
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