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1,2,3,6-tetra-O-galloyl-β-D-allopyranose gallotannin isolated, from Euphorbia jolkini, attenuates LPS-induced nitric oxide production in macrophages

Publication Type:Journal Article
Year of Publication:2010
Authors:Bin Park, S-, Kim, M-S, Lee, HSang, Lee, SHo, Kim, S-H
Journal:Phytotherapy Research
Volume:24
Issue:9
Date Published:2010
ISBN Number:1099-1573
Keywords:1,2,3,6-tetra-O-galloyl-β-D-allopyranose, Euphorbia, gallotannin, inflammation, nitric oxide, nuclear factor-κB
Abstract:

Nitric oxide (NO) is a pleiotropic regulator, critical to numerous biological processes, including vasodilatation and macrophage-mediated immunity. Macrophages express inducible NO synthase (iNOS) and produce NO after lipopolysaccharide (LPS) stimulation. Gallotannins are water-soluble polyphenols with wide-ranging biological activities. Various chemical structures of gallotannins occurring in medicinal and food plants that are used worldwide showed several remarkable biological and pharmacological activities. In the present study, we examined the inhibitory effects of gallotannin 1,2,3,6-tetra-O-galloyl-β-D-allopyranose (GT24) isolated from Euphorbia jolkini on the LPS-induced NO production and underlying mechanisms of action. GT24 dose-dependently decreased LPS-induced NO production and iNOS expression in J774A.1 macrophages. In addition, GT24 inhibited LPS-induced activation of nuclear factor (NF)-κB as indicated by inhibition of degradation of I-κBα, nuclear translocation of NF-κB, and NF-κB dependent gene reporter assay. Our results suggest that GT24 possesses an inhibitory effect on the LPS-induced inflammatory reaction. Copyright © 2010 John Wiley & Sons, Ltd.

URL:http://dx.doi.org/10.1002/ptr.3110
Short Title:Phytotherapy Research
Taxonomic name: 
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