Syntheses and radical scavenging activities of resveratrol derivatives
作者:Hyun Jung Lee、Jai Woong Seo、Bong Ho Lee、Kyoo-Hyun Chung、Dae Yoon Chi
DOI:10.1016/j.bmcl.2003.10.038
日期:2004.1
Nine new resveratrol derivatives, having bromo, iodo, and fluoroethyl groups, were designed and synthesized. All compounds having free phenol groups showed good free radicalscavengingactivity. Among them, 2-bromoresveratrol 19 has a similar free radicalscavengingactivity to (+)-catechin.
Stilbenoids represent a large group of bioactive compounds, which occur in food and medicinal plants.Twenty-five stilbenoids were screened in vitro for their ability to inhibit COX-1, COX-2 and 5-LOX. Piceatannol and pinostilbene showed activity comparable to the zileuton and ibuprofen, respectively.The anti-inflammatory potential of stilbenoids was further evaluated using THP-1 human monocytic leukemia cell line. Tests of the cytotoxicity on the THP-1 and HCT116 cell lines showed very low toxic effects. The tested stilbenoids were evaluated for their ability to attenuate the LPS-stimulated activation of NF-kappa B/AP-1. Most of the tested substances reduced the activity of NF-kappa B/AP-1 and later attenuated the expression of TNF-alpha.The effects of selected stilbenoids were further investigated on inflammatory signaling pathways. Non-prenylated stilbenoids regulated attenuation of NF-kappa B/AP-1 activity upstream by inhibiting the phosphorylation of MAPKs.A docking study used to in silico analyze the tested compounds confirmed their interaction with NF-kappa B, COX-2 and 5-LOX.