کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9416759 1292982 2005 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Anesthetic effects of progesterone are undiminished in progesterone receptor knockout mice
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب (عمومی)
پیش نمایش صفحه اول مقاله
Anesthetic effects of progesterone are undiminished in progesterone receptor knockout mice
چکیده انگلیسی
Progesterone has sedative and anesthetic effects but the underlying molecular mechanisms remain unclear. The two possible mechanisms by which progesterone affects the function of the brain include binding to intracellular progesterone receptors (PR) and metabolism to GABAA receptor-modulating neurosteroids. In this study, PR knockout (PRKO) mice were used as model to study the role of PRs in the anesthetic activity of progesterone. The progesterone-induced anesthetic activity was undiminished in female PRKO mice (ED50, 172 mg/kg) as compared to their wild-type littermates (ED50, 167 mg/kg). The progesterone-induced anesthetic activity was highly correlated with increased plasma allopregnanolone levels. Pretreatment of PRKO mice with the 5α-reductase inhibitor finasteride significantly reduced the progesterone-induced anesthetic activity. Allopregnanolone also evoked dose-dependent anesthetic activity in PRKO mice, which was similar to those of wild-type mice. Thus, the anesthetic activity of progesterone is not mediated by its interaction with PRs. The neurosteroid allopregnanolone partially mediates the anesthetic activity of progesterone by potentiation of GABAA receptor function.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Brain Research - Volume 1033, Issue 1, 1 February 2005, Pages 96-101
نویسندگان
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