Journal
PHYTOCHEMISTRY
Volume 160, Issue -, Pages 1-10Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.phytochem.2019.01.003
Keywords
Actaea vaginata (Ranunculaceae); Cycloartane trinortriterpenoids; Reduced density gradient; Inducible NO synthase; NF-kappa B pathway
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Funding
- National Key R&D Program of China [2017YFE0102200]
- National Natural Science Foundation of China [21372198, 81473103, 81872756]
- Key Technology R&D Program of Zhejiang Province [2018CO2034]
- Zhejiang Provincial Natural Science Foundation of China [LR17H300001]
- Science and Technology Development Fund, Macao S.A.R [FDCT 102/2017/A]
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Five undescribed cycloartane triterpenoids, including two cycloartane trinor-triterpenoids, were isolated from a 70% ethanol extract of the whole plant of Actaea vaginata (Ranunculaceae), together with thirteen known cycloartane triterpenoids. Their structures were determined by spectroscopic techniques and quantum chemical calculations for intramolecular noncovalent interactions with reduced density gradient method. All compounds were evaluated for their anti-inflammatory effects by a lipopolysaccharide (LPS)-stimulated nitric oxide (NO) production model in RAW264.7 macrophage cells, and some showed potent inhibitory effects with IC50 values ranging from 5.0 to 24.4 mu M. Further mechanism studies showed that one compound dose-dependently suppressed LPS-induced NO production and pro-inflammatory cytokines secretion, and decreased the expression of iNOS, through inhibiting NF-kappa B activation.
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