RP-HPLC法测定金刚藤软胶囊中薯蓣皂苷元的含量

目的建立金刚藤软胶囊中薯蓣皂苷元的含量测定方法.方法采用反相高效液相色谱法,色谱柱:Shim-Pak VP-ODS C18柱(4.6 mm×250mm,5μm),流动相:乙腈-水(87:13),检测波长209 nm.结果薯蓣皂苷元在0.0595～14.875μg范围内,进样量与峰面积线性关系良好(r=0.99999);平均回收率为99.4%,RSD=2.0%(n=5).结论该方法简便快速、稳定可靠,可用于测定金刚藤软胶囊中薯蓣皂苷元的含量.     

薯蓣皂素生产工艺的研究进展

介绍薯蓣皂素生产工艺的现状及存在的问题,对生产工艺的研究进展进行总结,并对生产工艺的发展前景提出了观点,认为低污染或无污染的薯蓣皂素生产工艺将成为其发展方向.     

薯蓣皂苷元对昆明鼠的亚慢性毒性实验

目的：评估薯蓣皂苷元对小鼠的亚慢性毒性作用。方法：采用随机数字表法将80只小鼠分为0（对照）、100、200、400 mg·kg^-1共4组,每天灌胃1次,连续给药90天,评估薯蓣皂苷元对小鼠的亚慢性毒性作用。观察指标包括小鼠体质量、毛色、饮食、粪便情况等,检测指标包括血常规分析、血液生化检查和病理学检查。结果：与对照组相比,雄性药物组小鼠体质量略减轻。血液学和病理学检查并无明显异常。结论：薯蓣皂苷元亚慢性毒性无可见不良效应剂量水平大于400 mg·kg^-1,口服给药较为安全。     

Cytotoxicity,Phytochemical Analysis and Antioxidant Activity of Crude Extracts from Rhizomes of Elephantorrhiza Elephantina and Pentanisia Prunelloides

Background

Elephantorrhiza elephantina (Ee) and Pentanisia prunelloides (Pp) are two medicinal plants which are widely used to remedy various ailments including diarrhoea, dysentery, inflammation, fever, rheumatism, heartburn, tuberculosis, haemorrhoids, skin diseases, perforated peptic ulcers and sore joints in southern Africa (South Africa, Swaziland, Botswana and Zimbabwe). The following study was conducted to explore the in vitro cytotoxicity, antioxidant properties and phytochemical profile of the two medicinal plants.

Materials and Methods

The cytotoxicity of the aqueous and methanol extracts and fractions of both species was studied using the brine shrimp lethality tests (BST) for the first time.

Results

The results demonstrated that the lethality (LC₅₀) for crude extracts for both plants ranged between 1.8 and 5.8 ppm and was relatively greater than that for the methanol, ethyl acetate and chloroform fractions of the extracts which ranged between 2.1 ppm and 27 ppm. This suggested that crude extracts were more potent than their respective fractions, further explaining that the different fractions of phytochemicals in these plant species work jointly (in synergy) to exert their therapeutic efficacy. Both aqueous and methanol extracts of the two medicinal plants demonstrated a high degree of antioxidant capacity against the DPPH radical with the Duh and Yen inhibition percentage ranging between 4.5% and 72%. Phytochemical studies of the rhizome extracts showed that the major compounds present include flavonoids, tannins, anthocyanidins, anthraquinones, triterpenoids (oleanolic acid), the steroidal saponin Diosgenin, the sugars, rhamnose, glucuronic acid, Arabinose and hexoses.

Conclusion

This is the first report of the detection and isolation of diosgenin and oleanolic acid from the rhizome extracts of Ee and Pp. All structures were determined using spectroscopic/spectrometric techniques (1H NMR and 13C and LC-ESI-MS) and by comparison with literature data.     

薯蓣皂苷元对小鼠下腔静脉结扎血栓形成及相关因子的影响

目的研究薯蓣皂苷元对静脉血栓形成的影响,并初步探讨其抗血栓作用的机理。方法通过小鼠下腔静脉结扎,测定形成血栓的重量及血清和血管壁内NO与MPO水平的变化。结果薯蓣皂苷元对小鼠下腔静脉结扎血栓形成具有抑制作用,能使血清中NO升高,而血管壁内的NO降低,MPO则升高。结论薯蓣皂苷元通过影响血液和血管壁内NO与MPO水平而发挥抗血栓形成作用。     

金刚藤水提醇沉正交实验研究

目的:考察金刚藤的最佳水提醇沉工艺.方法:以不同药液浓度、不同醇沉浓度及静置时间为考察因素,设计3个水平,以薯蓣皂苷元提取率为考察指标进行正交实验.结果:金刚藤药材的最佳醇沉工艺为:药液浓度0.25 g生/mL,醇沉浓度40%、静置24 h.结论:本工艺成本低,薯蓣皂苷元提取率高,干浸膏得率较少.     

薯蓣皂苷元对白细胞的粘附与迁移及内皮细胞ICAM-1的表达和NF-κB活化的影响(英文)

目的:探讨薯蓣皂苷元的抗炎活性及其可能机制,为其临床应用提供药理学依据。方法:采用酵母多糖A诱导的小鼠腹膜腔白细胞游走模型,评价薯蓣皂苷元的体内抗炎活性;利用白细胞与肿瘤坏死因子(TNF-α)活化的内皮细胞粘附的实验,验证薯蓣皂苷元的抗炎活性;采用聚合酶链式反应和流式细胞术,考察内皮细胞细胞间粘附分子-1(ICAM-1)的表达;蛋白印迹法测定细胞核中转录因子NF-κB/p65的表达及细胞裂解液中NF-κB/p65的磷酸化情况,以探讨薯蓣皂苷元抗炎的可能机制。结果:薯蓣皂苷元1,3mg·kg1灌胃给药1次,可显著减少酵母多糖A诱导的小鼠腹腔内白细胞数量;薯蓣皂苷元0.1,1μmol·L1体外加药5h,显著抑制人HL-60细胞与TNF-α活化的ECV304细胞的粘附,但对ECV304细胞活力无明显影响,也不影响HL-60细胞与静息状态ECV304细胞的粘附。同时,薯蓣皂苷元0.1,1μmol·L1明显抑制TNF-α诱导的ECV304细胞ICAM-1mRNA和蛋白的过量表达,1μmol·L1可抑制NF-κB/p65的核转移;薯蓣皂苷元明显减少TNF-α刺激10～30min诱导的NF-κB/p65的磷酸化,并呈一定浓度依赖性。结论:薯蓣皂苷元具有显著抑制白细胞的黏附迁移活性,其部分机制与抑制内皮细胞NF-κB活化,下调ICAM-1的表达有关。     

高效液相色谱法测定地奥心血康胶囊中薯蓣皂苷元的含量

目的:建立高效液相色谱法测定地奥心血康胶囊中薯蓣皂苷元含量的方法。方法:色谱柱为Shim-pack CLC-Sil(150mm×6.0mm,5μm),流动相为石油醚-异丙醇(98∶2),检测波长为206nm。结果:薯蓣皂苷元在0.58~11.6μg范围内线性关系良好,其回归方程为Y=3.682×107X+1700(r=0.9998);平均回收率为99.49%,(RSD=0.12%,n=5)。结论:该方法简便、准确、专属性强,可作为该制剂的质量控制方法。     

HPLC-ELSD法测定穿山龙中薯蓣皂苷元的含量

目的:建立高效液相色谱-蒸发光散射检测法(HPLC-ELSD)测定穿山龙中薯蓣皂苷元含量的方法.方法:使用Agilent Eclipse C18(150×4.6mm,5μm)色谱柱,流动相为甲醇-水(95:5),柱温:40℃,流速1.0ml/min;蒸发光检测器以N2为载气,载气压力3.5bar,漂移管温度为70℃.结...     

薯蓣属植物化学成分的研究——Ⅹ.蜀葵叶薯蓣中甾体皂甙和皂甙元的分离和鉴定

蜀葵叶薯蓣(Dioscorea althaeoides Kunth)为我国特有薯蓣品种,主产于四川、云南等省。根茎含薯蓣皂甙元。我们在系统研究国产薯蓣属植物化学成分的工作中,对蜀葵叶薯蓣中的甾体皂甙和皂甙元进行分离和鉴定。