Advances in Pharmacological Studies of Calycosin-7-O-β-D-glucoside

The isoflavone compound Calycosin-7-O-β-D-glucoside (CG) is an active monomer component extracted from the dry roots of the leguminous plant Astragalus mongolicus and Astragalus. It is also one of the main active ingredients in the Astragalus that is a commonly used traditional herb. CG has obvious effects of anti-oxidation, anti-virus, inhibition of melanin formation, and immunosuppression. With the advancement of modern technology, it has become a pivotal subject that the adjuvant therapy or even substitute for the synthetic drug of monomer of Chinese herb in medical field. In recent years, with the deepening of research on the mechanism of action of CG, which has been found that its pharmacological effects are very extensive, such as the anti-tumor effect and the effect on cerebrovascular diseases of CG. This review summarizes the pharmacological effects and the latest research progress of CG.

Calycosin-7-O-β-D-glucopyranoside stimulates osteoblast differentiation through regulating the BMP/WNT signaling pathways

The iso fl avone calycosin-7-O-β-D-glucopyranoside(CG) is a principal constituent of Astragalus membranaceus(AR) and has been reported to inhibit osteoclast development in vitro and bone loss in vivo. The aim of this study was to investigate the osteogenic effects of CG and its underlying mechanism in ST2 cells. The results show that exposure of cells to CG in osteogenic differentiation medium increases ALP activity, osteocalcin(Ocal) m RNA expression and the osteoblastic mineralization process. Mechanistically, CG treatment increased the expression of bone morphogenetic protein 2(BMP-2), p-Smad 1/5/8, β-catenin and Runx2, all of which are regulators of the BMP- or wingless-type MMTV integration site family(WNT)/β-catenin-signaling pathways. Moreover, the osteogenic effects of CG were inhibited by Noggin and DKK-1 which are classical inhibitors of the BMP and WNT/β-catenin-signaling pathways, respectively. Taken together, the results indicate that CG promotes the osteoblastic differentiation of ST2 cells through regulating the BMP/WNT signaling pathways. On this basis, CG may be a useful lead compound for improving the treatment of bone-decreasing diseases and enhancing bone regeneration.

A new flavone glycoside from Cancrinia discoidea(Ledeb.) Poljak

A new flavone glucoside,selagin-7-O-（6″-O-acetyl-）-β-D-glycoside,has been isolated from Cancrinia discoidea（Ledeb.） Poljak.Its structure was identified by spectroscopic methods,2D NMR and MS.Compounds exhibited activity of anti-inflammatory in vitro.

HPLC-DAD-MS研究黄芪的化学成分

目的建立HPLC-DAD-MS快速分离分析黄芪Astragali Radix化学成分的方法。方法色谱柱为Thermo Hypersil-Hypurity C18(150 mm×2.1 mm,5μm)分析柱,柱温40℃,流动相水-甲醇(梯度洗脱),体积流量0.25 mL/min。二极管阵列扫描范围200～370 nm。质谱采用大气压化学电离(APCI+)离子源,扫描范围m/z 100～650。结果通过与已有文献报道的质谱、紫外光谱和保留行为比较可以初步定性5个化合物,分别为calycosin-7-O-β-D-glycoside、ononin、calycosin、formononetin、(3R)-7,2′-dihydroxy-3′,4′-dimethoxyisoflavan。结论因为能够同时提供相对分子质量、紫外光谱和保留行为,所以HPLC-DAD-MS是一种分析中药化学成分的有力方法。

过山蕨水提物的化学成分分离鉴定

目的:过山蕨为铁角蕨科过山蕨属植物过山蕨(Camptosorus sibiricus)的地上全草部位,是一种民间常用药,目前关于过山蕨的生物活性研究主要集中在过山蕨总黄酮上,对其化学成分的研究尚有不足,药效成分也不能完全确认。该实验对过山蕨的化学成分进行系统分离,从药效物质基础的角度探寻其作为过山蕨补充药物来源的可能性,为进一步的药理活性和充分开发利用过山蕨植物资源提供物质基础和科学依据。方法:采用硅胶柱,ODS开放柱,Sephadex LH-20柱以及反相高效液相色谱法对过山蕨水提物进行化学成分的分离。根据其理化性质和波谱数据鉴定化合物结构。结果:分离得到10个化合物,分别鉴定为(7E)-9-hydroxymegastigma-4,7-dien-3-on-9-O-β-D-glucoside (1),bridelionoside F (2),(3R,5S,6S,7E,9S)-megastigman-7-ene-3,5,6,9-tetrol 9-O-β-D-glucopyranoside(3),(6S,7E,9R)-roseoside(4),(3S,5S,6R,9R)-3-hydroxy-5,6-epoxy-β-ionol-9-O-β-glucopyranoside(5),6,9-dihydroxy-4,7-megastigmadien-3-one(6),elaphoside A(7),ptelatoside-A(8),n-butyl-α-β-Dfructofuranoside(9),dibutylphthalate(10)。结论:首次从过山蕨属中分离得到化合物1~10,以上化合物的发现进一步丰富了过山蕨的化学成分组成,为综合开发和利用过山蕨植物资源提供前期的实验基础。