电喷雾质谱结合化学计量学方法快速筛选玛咖促睾丸间质细胞增殖活性成分

应用电喷雾串联质谱法( ESI-MS/MS)对云南和秘鲁产玛咖样品中低极性化学成分进行检测,获得各样品的一级质谱指纹谱图和各离子峰的二级质谱数据,并测定各样品促进大鼠睾丸间质细胞增殖活性,采用化学计量学方法主成分分析( PCA)、偏最小二乘法( PLS)和灰色关联度分析( GRA)对所获得的一级质谱数据进行处理后,可有效区分玛咖的不同产地,且筛选出其中具有促大鼠睾丸间质细胞增殖活性的可能成分,进而通过二级质谱数据分析得到可能活性成分的结构。实验结果表明,玛咖低极性成分具有很好的促大鼠睾丸间质细胞增殖活性,其中活性较强的主要为N-benzylhexadecanamide和N-benzy-(9Z,12Z,15Z)-octadecatrien-amide。本方法为简单、快速分析中药中促睾丸间质细胞增殖活性成分筛选方法提供了借鉴。

Rapid Screening of Active Components of Lepidium Meyenii Promoting Leydig Cell Proliferation by Electrospray Ionization Mass Spectrometry and Chemometrics Methods

The low-polarity constituents from Lepidium meyenii in Yunnan and Peru were detected by electrospray ionization tandem mass spectrometry ( ESI-MS/MS ) . The effects of 10 samples of Lepidium meyenii on proliferation of rat leydig cells were measured. After the process of MS data using principal component analysis ( PCA ) methods, the samples from Yunnan and Peru were distinguished effectively. Subsequently, the grey relational degree analysis ( GRA ) and partial least squares analysis ( PLS ) were employed to reveal the correlation between common peaks of ESI fingerprint of Lepidium meyenii from different geographical origins and proliferation activity of rat leydig cells. The results suggested that most low-polarity constituents from Lepidium meyenii had good activities on proliferation of rat leydig cells, in which N-benzylhexadecanamide and N-benzy-(9Z,12Z,15Z)-octadecatrienamide exhibited the highest activities. In addition, the proposed procedure could also be used as a simple, quick reference method to screen the active components promoting Leydig cell proliferation in traditional Chinese medicine.