Bioactivity-Guided Isolation of GABAA Receptor Modulating Constituents from the Rhizomes of Actaea racemosa
摘要:
Black cohosh (Actaea racemosa) is a frequently used herbal remedy for the treatment of mild climacteric symptoms. In the present study, the modulation of gamma-aminobutryic acid (GABA)-induced chloride currents (I-GABA) through GABA type A (GABA(A)) receptors by black cohosh extracts and isolated compounds was investigated. GABA(A) receptors, consisting of alpha(1), beta(2), and gamma(2S) subunits, were expressed in Xenopus laevis oocytes, and potentiation of I-GABA was measured using the two-microelectrode voltage clamp technique. In a bioactivity-guided isolation procedure the positive modulation of I-GABA could be restricted to the plant terpenoid fractions, resulting in the isolation of 11 cycloartane glycosides, of which four significantly (p < 0.05) enhanced I-GABA. The most efficient effect was observed for 23-O-acetylshengmanol 3-O-beta-D-xylopyranoside (4, 100 mu M), enhancing I-GABA by 1692 +/- 201%, while actein (1), cimigenol 3-O-beta-D-xylopyranoside (6), and 25-O-acetylcimigenol 3-O-alpha-L-arabinopyranoside (8) were significantly less active. In the absence of GABA, only 4 induced small (not exceeding 1% of IGABA-max) chloride inward currents through GABA(A) receptors. It is hypothesized that the established positive allosteric modulation of GABA(A) receptors may contribute to beneficial effects of black cohosh extracts in the treatment of climacteric symptoms.
Chemical Constituents from Cimicifuga dahurica and Their Anti-Proliferative Effects on MCF-7 Breast Cancer Cells
作者:Chu Huyen、Bui Luyen、Ghulam Khan、Ha Oanh、Ta Hung、Hui-Jun Li、Ping Li
DOI:10.3390/molecules23051083
日期:——
compounds from natural plants. The 70% ethanolic extract from the rizhomes of Cimicifuga dahurica (Turcz.) Maxim. (Ranunculaceae) was found to possess significant in vitro anti-proliferative effects on MCF-7 breast cancer cells. A phytochemical investigation using assay-guided fractionation of the ethanolic extract of C. dahurica resulted in the isolation of one new phenolic amide glycoside 3, two new lignan
Studies on the Chinese Crude Drug "Shoma." VIII. Two New Triterpenol Bisdesmosides, 3-Arabinosyl-24-O-acetylhydroshengmanol 15-Glucoside and 3-Xylosyl-24-O-acetylhydroshengmanol 15-Glucoside, from Cimicifuga dahurica.
Cycloartane tetracyclic triterpenoid compound, preparation method therefor and use thereof
申请人:Hefei Cosource Pharmaceuticals Inc.
公开号:US10568892B2
公开(公告)日:2020-02-25
The present invention relates to the field of natural medicine and pharmaceutical chemistry, and in particular relates to a cycloartane tetracyclic triterpenoid compound (I), a preparation method thereof and the medical use thereof. The pharmacodynamic tests demonstrate that the compound of the present invention has a pharmacodynamic activity on heart and cerebral vessels and can be used to prevent or treat cardiovascular and/or cerebrovascular diseases such as arrhythmia, myocardial infarction, and coronary heart disease or the like.
Compositions containing enriched natural crocin and/or crocetin, and their therapeutic or nutraceutical uses
申请人:Gao Song
公开号:US10842805B2
公开(公告)日:2020-11-24
The invention relates to unique compositions containing enriched and purified natural crocin and/or crocetin for prevention and/or treatment of cancers and other conditions and diseases. Compositions comprise mainly enriched or purified natural crocin or crocetin or combination of both and possible other active phytochemicals. A composition is used as functional food, drink, dietary supplement, or therapeutic dosage to a human orally or through other appropriate way (parenteral, percutaneous, rectal, mucosal, intranasal or topical administration). A method of natural crocin and crocetin enriching and purification is revealed.
An oral care composition comprising a Cimicifuga-salt, a coptis, a zanthoxylin, and a filler material is disclosed. The Cimicifuga-salt consists of a salt and a Cimicifuga extract, and an admixture of the Cimicifuga-salt, the coptis and the zanthoxylin accounts for about 1.1% to 80% of the composition by weight and the remaining portion of the composition is the filler material.