款冬花中抑制肺癌细胞LA795增殖的活性成分研究

Studies on Inhibitory Effect of Active Constituents from Tussilago farfara L.on Lung Cancer Cells LA795 Proliferation

分析研究了款冬花中具有抑制肺癌细胞增殖的活性成分.以小鼠肺腺癌LA795细胞为体外抑瘤筛选模型,利用四甲基偶氮唑盐(MTT)比色法,结合硅胶柱色谱,Sephadex LH-20,PHPLC等手段追踪分离款冬花抗肺癌的活性成分.并通过理化和波谱分析方法鉴定了单体化合物的结构.它们分别是:1,2-di-(3′,4′-dihydroxycinnamoyl)-cychopenta-3-ol,(Ⅰ)、芦丁(Rutin,Ⅱ)、山奈酚(Kaemferol,Ⅲ)、槲皮素(Quercetin,Ⅳ)、异槲皮苷(Isoquercitrin,Ⅴ).其中(Ⅰ)为新化合物,化合物(Ⅴ)为首次从款冬花中分离得到.并采用MTT法对分得的化合物进行抑制LA795细胞株增殖作用的研究,用半数抑制浓度(IC)评价其抗肿瘤活性.结果表明化合物Ⅰ,Ⅲ,Ⅳ对小鼠肺腺癌细胞LA795的增殖都显示出一定的抑制作用.其中化合物Ⅰ和Ⅳ抑瘤作用较显著.IC50分别为125.2和83.2μg/mL.这些化合物抗肺癌细胞增殖活性为款冬花中首次发现.

The inhibitory lung cancer cells proliferation effect of active constituents from Tussilago farfara L.were analyzed and studied.Bioassay-directed fractionation of Tussilago farfara L.led to isolation of compounds with silica gel,Sephadex LH-20 and PHPLC,etc.Their anti-tumor activities were evaluated by MTT with mouse lung cancer cells LA795 as screening model.Five compounds were obtained and their structures were identified on the basis of spectroscopic evidences and physicochemical properties.They are 1,2-...