Journal
BIOORGANIC & MEDICINAL CHEMISTRY LETTERS
Volume 21, Issue 18, Pages 5602-5604Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.bmcl.2011.06.130
Keywords
Angelica keiskei; Alkylated chalcone; Neuraminidase; H1N1
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Funding
- Ministry of Agriculture and Forestry [308025-05-1-SB010]
- KRIBB Research Initiative Program, Republic of Korea
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As part of our ongoing effort to develop influenza virus neuraminidase (NA) inhibitors from various medicinal plants, we utilized bioassay-guided fractionation to isolated six alkylated chalcones (1-6) from Angelica keiskei. Xanthokeistal A (1) emerged as new compound containing the rare alkyl substitution, 6,6-dimethoxy-3-methylhex-2-enyl. When we tested the ability of these individual alkyl substituted chalcones to inhibit influenza virus NA hydrolysis, we found that 2-hydroxy-3-methyl-3-butenyl alkyl (HMB) substituted chalcone (3, IC(50) = 12.3 mu M) showed most potent inhibitory activity. The order of potency of substituted alkyl groups on for NA inhibition was HMB >6-hydroxyl-3,7-dimethyl-octa-2,7-dienyl > dimethylallyl > geranyl. All NA inhibitors screened were found to be reversible noncompetitive inhibitors. (C) 2011 Elsevier Ltd. All rights reserved.
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