title: Quercetin inhibits matrix metalloproteinase-1 expression in human vascular endothelial cells through extracellular signal-regulated kinase.
abstract: Studies have shown that intake of quercetin was inversely associated with mortality from coronary heart disease. Since recent studies documented that disruption of atherosclerotic plaques is the key event triggering acute myocardial infarction, and vascular endothelium-derived matrix metalloproteinase-1 (MMP-1) contributes to plaque destabilization, we examined the effect of quercetin on MMP-1 expression in human vascular endothelial cells. Our results showed that quercetin significantly inhibited basal and oxidized LDL (oxLDL)-stimulated MMP-1 expression. Our data also indicated that extracellular signal-regulated kinase (ERK) mediated the basal and oxLDL-stimulated expression of MMP-1, and quercetin is a potent inhibitor of ERK, suggesting that quercetin may inhibit MMP-1 expression by blocking the ERK pathway. Finally, we showed that quercetin stimulated tissue inhibitor of metalloproteinase-1 expression in oxLDL- and PMA-treated cells. In conclusion, the present study demonstrated for the first time that quercetin inhibited MMP-1 expression in vascular endothelial cells, suggesting that quercetin might contribute to plaque stabilization.
authors: Ralph H. Johnson Veterans Administration Medical Center, Charleston, South Carolina 29401, USA.
authors: L
authors: L
authors: Song
authors: M
authors: M
authors: Xu
authors: M F
authors: MF
authors: Lopes-Virella
authors: Y
authors: Y
authors: Huang
mesh_terms: D002478:Cells, Cultured; D004247:DNA / Q000187:drug effects / Q000378:metabolism; D004730:Endothelium, Vascular / Q000187:drug effects* / Q000201:enzymology; D004791:Enzyme Inhibitors / Q000494:pharmacology*; D015870:Gene Expression / Q000187:drug effects; D006801:Humans; D008077:Lipoproteins, LDL / Q000494:pharmacology; D020781:Matrix Metalloproteinase 1 / Q000096:biosynthesis / Q000378:metabolism; D061965:Matrix Metalloproteinase Inhibitors; D020928:Mitogen-Activated Protein Kinases / Q000378:metabolism*; D010766:Phosphorylation / Q000187:drug effects; D011794:Quercetin / Q000494:pharmacology*; D015398:Signal Transduction; D014471:Umbilical Veins / Q000166:cytology
chemical_list: D004791:Enzyme Inhibitors; D008077:Lipoproteins, LDL; D061965:Matrix Metalloproteinase Inhibitors; C099252:oxidized low density lipoprotein; D004247:DNA; D011794:Quercetin; D020928:Mitogen-Activated Protein Kinases; D020781:Matrix Metalloproteinase 1