کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1992994 1541072 2007 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Estrogen-like effect of a Cimicifuga racemosa extract sub-fraction as assessed by in vivo, ex vivo and in vitro assays
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شیمی
پیش نمایش صفحه اول مقاله
Estrogen-like effect of a Cimicifuga racemosa extract sub-fraction as assessed by in vivo, ex vivo and in vitro assays
چکیده انگلیسی

Black cohosh (Cimicifuga racemosa) is used in the treatment of painful menstruation and menopausal symptoms. Data about the nature of the active compounds and mechanism(s) of action are still controversial, chiefly with respect to its estrogenic activity.This work aimed to assess the possible estrogenic activity of a commercial dry hydro-alcoholic extract of C. racemosa and its hydrophilic and lipophilic sub-fractions on in vivo, ex vivo, and in vitro assays.In a yeast estrogen screen, only the lipophilic sub-fraction was able to activate the human estrogen receptor α, with a lower potency but comparable efficacy to that of 17 β-estradiol.Neither the total extract nor the lipophilic sub-fraction showed an in vivo uterotrophic effect in 21-day-old rats. Uterine tissues obtained ex vivo from C. racemosa treated animals were generally much less sensitive to oxytocin, prostaglandin F2α, and bradykinin than tissues obtained from estradiol valerate treated rats.The lipophilic sub-fraction, instead, induced a dose-dependent inhibitory activity on the in vitro response to oxytocin, prostaglandin F2α, and bradykinin of uterine horns from naïve 28-day-old rats, with a potency rate close to 1:30 of that of 17 β-estradiol.Reported results confirm the effectiveness of C. racemosa in menstrual distress and further emphasize the possibility that lipophilic constituents bind to an as yet not identified estrogen receptor, likely inversely involved in inflammation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Journal of Steroid Biochemistry and Molecular Biology - Volume 107, Issues 3–5, November–December 2007, Pages 262–269
نویسندگان
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