Comparative Cytotoxicity of Glycyrrhiza glabra Roots from Different Geographical Origins Against Immortal Human Keratinocyte (HaCaT), Lung Adenocarcinoma (A549) and Liver Carcinoma (HepG2) Cells

Glycyrrhiza glabra L. (Fabaceae), commonly known as ‘liquorice’, is a well‐known medicinal plant. Roots of this plant have long been used as a sweetening and flavouring agent in food and pharmaceutical products, and also as a traditional remedy for cough, upper and lower respiratory ailments, kidney stones, hepatitis C, skin disorder, cardiovascular diseases, diabetes, gastrointestinal ulcers and stomach ache. Previous pharmacological and clinical studies have revealed its antitussive, antiinflammatory, antiviral, antimicrobial, antioxidant, immunomodulatory, hepatoprotective and cardioprotective properties. While glycyrrhizin, a sweet‐tasting triterpene saponin, is the principal bioactive compound, several bioactive flavonoids and isoflavonoids are also present in the roots of this plant. In the present study, the cytotoxicity of the methanol extracts of nine samples of the roots of G. glabra, collected from various geographical origins, was assessed against immortal human keratinocyte (HaCaT), lung adenocarcinoma (A549) and liver carcinoma (HepG2) cell lines using the in vitro 3‐[4,5‐dimethylthiazol‐2‐yl]‐2,5‐diphenyl tetrazoliumbromide cell toxicity/viability assay. Considerable variations in levels of cytotoxicity were observed among various samples of G. glabra. Copyright © 2015 John Wiley & Sons, Ltd.     

土茯苓的化学成分研究（一）

从土茯苓中分得２个单体化合物，经光谱分析分别鉴定为３，５，４’－三羟基芪（Ｉ）和（一）表儿茶精（Ⅱ），这两个化合物系首次从该植物中分离得到。并通过２维核磁共振相关谱准确地指定了这两个化合物的碳氢归属。     

RP-HPLC法测定广东海风藤中五味子醇甲的含量

目的:建立RPHPLC测定广东海风藤中五味子醇甲含量的方法。方法:固定相为KromasilC18反相柱(5μm,250mm×4.6mm),流动相为甲醇水(65∶35),检测波长为250nm。结果:该方法的线性范围为0.08～0.60μg(r=0.9998),平均回收率为100.24%,RSD=2.09%(n=5)。结论:本法简便,准确,灵敏度高,重现性好,可用于广东海风藤中五味子醇甲含量的测定。     

17种国产菝葜属植物中白藜芦醇含量比较

目的测定17种国产菝葜属植物样品中白藜芦醇的含量。方法以活性成分白藜芦醇为指标,采用HPLC法对采自我国17种菝葜属植物样品进行含量测定。结果不同品种菝葜中白藜芦醇的含量有显著差异。小果菝葜、长托菝葜、黑果菝葜等含量较高,而短梗菝葜、尖叶菝葜、土茯苓等不能检测出。结论该研究为菝葜属植物资源的深入开发利用提供了一定的科学依据。     

柱色谱-分光光度法测定菝葜中总黄酮的含量

目的 建立测定菝葜中总黄酮含量的方法.方法 测定波长500 nm,以芦丁为对照品,采用柱色谱-分光光度法测定不同产地菝葜中总黄酮的含量.结果 芦丁在8.02～48.12 μg·ml-1范围内线性关系良好(r=0.9996),平均回收率为96.70%,RSD=1.24%.结论 所建方法操作简便、结果准确、重复性好,可用于药材的质量控制.     

通光藤化学成分和药理作用研究进展

通过对通光藤化学成分和药理作用研究进展进行综述,为其研究开发提供有价值的参考。通光藤主要含有C21甾体类化合物,其结构特点是苷元11α和12β位连有多种酰基取代基团,3β位连有糖链基团;药理研究证明其具有抗肿瘤、降血压、平喘等作用。通光藤抗肿瘤生物活性具有潜在开发前景,深入开展相关研究工作具有重要的意义。     

拔葜抗炎作用及对炎症介质的影响

目的:研究拔葜抗炎作用及作用机制。方法:观察拔葜对角叉菜胶所致大鼠足肿胀、炎症组织和血清中前列腺素E2(PGE2)、丙二醛(MDA)、一氧化氮(NO)、超氧化物歧化酶(SOD)含量的影响。结果:拔葜灌胃给药能明显抑制角叉菜胶所致正常大鼠和去肾上腺大鼠足肿胀,150g/kg拔葜可降低肿胀足爪组织中PGE2及血清中NO、MDA含量,90、150g/kg拔葜可降低肿胀足爪组织中NO含量。结论:拔葜可能通过影响炎症介质释放而起到抑制角叉菜胶性大鼠足肿胀作用。     

土茯苓体外抑菌作用研究

目的探讨土茯苓的体外抑菌作用。方法用K-B纸片扩散法。100%土茯苓浸出液滤纸片对金黄色葡萄球菌、白色葡萄球菌、绿脓杆菌、大肠杆菌、伤寒杆菌、甲型链球菌、乙型链球菌抑菌作用进行了研究。结果土茯苓对以上细菌均有明显抑菌作用。结论土茯苓在体外有明显的抑菌作用。     

大孔吸附树脂分离肿节风中总黄酮的研究

目的考察11种大孔吸附树脂对肿节风总黄酮的吸附分离性能。方法采用静态吸附分离法确定适合的大孔吸附树脂;采用动态吸附分离法确定分离条件。以总黄酮吸附量、总黄酮质量分数和回收率为考察指标,采用紫外分光光度法测定总黄酮。结果HPD 400大孔吸附树脂对肿节风总黄酮有良好的吸附分离性能,其分离肿节风总黄酮的工艺条件为:肿节风总黄酮上样质量浓度为10 m g/mL,肿节风总黄酮最大吸附量为9.5 m g/mL,吸附体积流量为2.5 mL/m in,洗脱剂为70%乙醇,洗脱剂用量为3倍柱体积,树脂可重复使用3次。结论采用HPD 400大孔吸附树脂吸附分离肿节风总黄酮简便有效,总黄酮回收率为85%左右。     

Antibacterial activity of Ailanthus excelsa (Roxb)

The antibacterial activity of different fractions of a methanol extract obtained from the dried stem bark of Ailanthus excelsa (Roxb) was studied using different bacterial strains. The ethyl acetate fraction inhibited the growth of all test bacteria. The MIC of the EA fraction was found to be 6 mg/disc. Copyright -Copyright 2001 John Wiley & Sons, Ltd.