基于UHPLC-Q Extractive轨道阱高分辨质谱的款冬花、叶的化学比较

Comparison of flower buds and leaves of Tussilago farfara L. by UHPLC-Q Extractive Hybrid Quadrupole Orbitrap MS

款冬花是中医临床常用药材,具有止咳化痰作用。款冬叶也具有相似的药理作用。对款冬叶和花进行系统的化学比较,有助于进一步促进款冬叶的资源利用。本研究采用高分辨液质联用技术对款冬花和叶进行了化学比较,采用靶标和非靶标结合的指认策略鉴定化学成分43种,进一步分析显示款冬酮、款冬花素酯等倍半萜类物质在花中的含量远远高于叶,而绿原酸、异绿原酸等苯丙素类物质在叶中的含量高于花蕾;黄酮类物质金丝桃苷、槲皮素在款冬花和叶中含量接近,而芦丁、山柰酚在款冬花中含量较高。说明款冬花和叶含有相似的化学成分,但款冬叶中以绿原酸类为代表的苯丙素类成分含量较高,而这类成分与止咳化痰作用密切相关。本研究为款冬叶的资源利用奠定了基础。

The flower bud of Tussilago farfara L. has been commonly used in the treatment of cough, bronchitis and asthmatic disorders in the Traditional Chinese Medicine. In Europe, the leaves were also used as herbal drugs with similar pharmacological activities. In order to utilize the leaves, it is important to conduct the chemical comparison between the flower buds and the leaves. In this study, ultra high liquid chromatography（UHPLC） coupled with Q Exactive high resolution mass spectrometry（HR-MS） was used to compare the chemical composition of the flower buds and leaves of T. farfara L. forty three metabolites were identified by the combination of targeted and untargeted approach. The results suggest that the sesquiterpenes, such as tussilagone and 7β-（3＇-ethyl-cis-crotonoyloxy）-1α-（2＇-methylbutyryloxy）-3（14）-dehydro-Z-notonipetranone were higher in the flower buds. While the phenylpropanoids, such as cholorgenic acid and isochlorogenic acid were higher in the leaves. The flavonoids, such as hyperin and quercetin exhibited no difference between the flower buds and leaves, while the rutin and kaempferol were higher in the flower buds. The leaves and flower buds had similar chemical components, and the phenylpropanoids, which were closely related with the antitussive and expectorant activities, were found at higher concentrations in the leaves. The results presented here laid the basis for the rational utilization of the leaves of T. farfara L.