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Vaticanol B, a resveratrol tetramer, regulates endoplasmic reticulum stress and inflammation.
- Source :
-
American Journal of Physiology: Cell Physiology . Jul2007, Vol. 293 Issue 1, pC411-C418. 8p. 5 Graphs. - Publication Year :
- 2007
-
Abstract
- Enhanced endoplasmic reticulum (ER) stress has been implicated in various pathological situations including inflammation. During a search for compounds that regulate ER stress, we identified vaticanol B, a tetramer of resveratrol, as an agent that protects against ER Stress-induced cell death. Vaticanol B suppressed the induction of unfolded protein response-targeted genes such as glucose-regulated protein 78 (GRP78) and C/EBP-homologous protein (CHOP) after cells were treated with ER stressors. Analysis in the mouse macrophage cell line RAW 264.7 revealed that vaticanol B also possesses a strong anti-inflammatory activity. Production of a variety of inflammatory modulators such as tumor necrosis factor-α, nitric oxide, and prostaglandin E2 was inhibited by vaticanol B to a much greater extent than by monomeric or dimeric resveratrol after exposure of cells to lipopolysaccharide. Further investigations to determine the common mechanisms underlying the regulation of ER stress and inflammation by vaticanol B disclosed an important role for vaticanol B in regulation of basic gene expression and in prevention of the protein leakage from the ER into the cytosol in both conditions. These results suggest that vaticanol B is a novel anti-inflammatory agent that improves the ER environment by reducing the protein load on the ER and by maintaining the membrane integrity of the ER. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03636143
- Volume :
- 293
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- American Journal of Physiology: Cell Physiology
- Publication Type :
- Academic Journal
- Accession number :
- 25846323
- Full Text :
- https://doi.org/10.1152/ajpcell.00095.2007