Iridoid and phenylethanoid/phenylpropanoid metabolite profiles of Scrophularia and Verbascum species used medicinally in North America
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Botanicals containing iridoid and phenylethanoid/phenylpropanoid glycosides are used worldwide for the treatment of inflammatory musculoskeletal conditions that are primary causes of human years lived with disability, such as arthritis and lower back pain.
We report the analysis of candidate anti-inflammatory metabolites of several endemic Scrophularia species and Verbascum thapsus used medicinally by peoples of North America.
Leaves, stems, and roots were analyzed by ultra-performance liquid chromatography-mass spectrometry (UPLC-MS) and partial least squares-discriminant analysis (PLS-DA) was performed in MetaboAnalyst 3.0 after processing the datasets in Progenesis QI.
Comparison of the datasets revealed significant and differential accumulation of iridoid and phenylethanoid/phenylpropanoid glycosides in the tissues of the endemic Scrophularia species and Verbascum thapsus.
Our investigation identified several species of pharmacological interest as good sources for harpagoside and other important anti-inflammatory metabolites.
KeywordsHarpagoside Iridoid Phenylethanoid/phenylpropanoid Scrophularia Verbascoside Verbascum
We acknowledge support from the National Science Foundation Graduate Research Fellowship Program (NSF GRFP) and Achievement Rewards for College Scientists (ARCS) Foundation, Seattle ARCS Chapter to Korey Brownstein, and NIH/NCCIH grant 1R21AT009086 (W. Folk). We would also like to thank Michael and Deborah Brownstein for editorial assistance, Todd Coffey for statistical assistance, Jeong-Jin Park for Synapt G2-S assistance, George Rottinghaus for assistance with liquid chromatography, and Susan Vogtman for growth chamber assistance. The contents are solely the responsibility of the authors and do not necessarily represent the official views of the sponsors.
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Conflict of interest
The authors declare that there are no conflicts of interest.
Research involving human participants and animals
These statements are not applicable because this article does not contain any studies with human participants or animals.
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