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Identification of five hepatotoxic pyrrolizidine alkaloids in a commonly used traditional Chinese medicinal herb, Herba Senecionis scandentis (Qianliguang)
Author(s) -
Li SongLin,
Lin Ge,
Fu Peter P.,
Chan ChiLeung,
Li Mi,
Jiang ZhiHong,
Zhao ZhongZhen
Publication year - 2008
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.3398
Subject(s) - pyrrolizidine , chemistry , herb , traditional medicine , pyrrolizidine alkaloid , phytochemical , medicinal herbs , stereochemistry , biochemistry , medicine
Senecio scandens Buch.‐Ham is a plant source for a commonly used traditional Chinese medicinal (TCM) herb Qianliguang. A TCM herbal proprietary product containing Qianliguang as the major herb for the treatment of sinusitis has been used in China for several decades, and has also been exported to other regions and countries worldwide. In the present study, the aqueous extract of S . scandens collected in the Shanxi Province of China was determined, for the first time, to contain hepatotoxic and tumorigenic pyrrolizidine alkaloids (PAs) by using high‐performance liquid chromatography/mass spectrometric (HPLC/MS) analysis in various scanning modes. A total of nine toxic and two non‐toxic PAs were detected in the aqueous extract of S . scandens , of which six PAs, namely neoplatyphylline, senecionine, senecionine N ‐oxide, seneciphylline, seneciphylline N ‐oxide and senkirkine, were unequivocally characterized, while other PAs were tentatively assigned as jacobine, jacozine N ‐oxide (or erucifoline N ‐oxide), 7‐tigloylplatynecine, usaramine and an isomer of yamataimine. The estimated total content of toxic PAs in S . scandens was 10.82 µg/g herb, which was significantly higher than that (≥1 µg/g herb) recommended by Belgium and Germany not to be used clinically. Among the PAs definitively identified, senecionine, seneciphylline, and senkirkine are known tumorigens capable of inducing liver tumors in experimental animals, while seneciphylline N ‐oxide and senecionine N ‐oxide are probably tumorigenic due to their potential conversion into seneciphylline and senecionine via metabolic reduction in the body. Thus, the current finding of the presence of toxic/tumorigenic PAs in S . scandens challenges the safety of using this TCM herb and its proprietary products. Copyright © 2008 John Wiley & Sons, Ltd.