Journal
FITOTERAPIA
Volume 83, Issue 7, Pages 1281-1285Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.fitote.2012.05.016
Keywords
3,5-Dicaffeoylquinic acid; Derivatives; Artemisia argyi; Leucyl-tRNA synthetase; Anti-giardial
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Funding
- Science and Technology Commission of Shanghai Municipality (STCSM) [08DZ1974000, 10dz2220500]
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An aqueous ethanol extract of Artemisia argyi inhibited the aminoacylation activity of LeuRS from Giardia lamblia (GlLeuRS). The bioassay-guided fractionation of the extract led to the isolation of 3,5-dicaffeoylquinic acid (1), with an IC50 of 5.82 mu g/mL. The ester derivatives of 1 were also found to possess strong anti-GlLeuRS effects, with IC50 values of 1.79, 5.51 and 2.56 mu g/mL respectively. Anti-giardial assay showed that the derivatives, especially 3,5-dicaffeoylquinic acid propyl ester (4) (IC50 =4.62 mu g/mL), were effective at killing G. lamblia. (C) 2012 Elsevier B.V. All rights reserved.
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