Abstract
This study is intended to explore the chemical differences of Acori Tatarinowii Rhizoma (ATR) samples collected from two habitats, Sichuan and Anhui provinces, China. Gas chromatography-mass spectrometry (GC-MS) was applied to establishing the quantitative chemical fingerprints of ATRs. A total of 104 volatile compounds were identified and quantified with the information of mass spectra and retention index (RI). Furthermore, least absolute shrinkage and selection operator (LASSO), a sparse regularization method, combined with subsampling was employed to improve the classification ability of partial least squares-discriminant analysis (PLS-DA). After variable selection by LASSO, three chemical markers, β-elemene, α-selinene and α-asarone, were identified for the discrimination of ATRs from two habitats, and the total classification correct rate was increased from 82.76% to 96.55%. The proposed LASSO-PLS-DA method can serve as an efficient strategy for screening marked chemical components and geo-herbalism research of traditional Chinese medicines.
摘要
本文旨在研究中国四川和安徽2 个产地石菖蒲样品的化学差异。首先通过气相色谱-质谱联用 (GC-MS)技术建立石菖蒲的定量化学指纹图谱,基于色谱、质谱信息和保留指数定性和定量了石菖 蒲中104 种挥发性化合物。在此基础上,采用一种稀疏正则化方法来提高偏最小二乘-判别分析 (PLS-DA)模型的分类能力,使得分类精度从82.76%上升到96.55%。最后,结合最小绝对收缩与选 择算子(LASSO)与二次采样筛选出区别于2 个产地的3 个化学标记物:β-榄香烯,α-芹菜素和α-细 辛醚。本文采用的最小绝对收缩与选择算子-偏最小二乘-判别分析(LASSO-PLS-DA)算法可以作为 筛选中草药中标志性化学成分和进行地理草药学研究的有效方法。
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Foundation item: Project(21465016) supported by the National Natural Foundation of China
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Ma, Ss., Zhang, By., Chen, L. et al. Discrimination of Acori Tatarinowii Rhizoma from two habitats based on GC-MS fingerprinting and LASSO-PLS-DA. J. Cent. South Univ. 25, 1063–1075 (2018). https://doi.org/10.1007/s11771-018-3806-8
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DOI: https://doi.org/10.1007/s11771-018-3806-8
Key words
- Acori Tatarinowii Rhizoma
- gas chromatography-mass spectrometry
- least absolute shrinkage and selection operator (LASSO)
- partial least squares-discriminant analysis