American Journal of Clinical Nutrition, Vol 68, 1208-1214, Copyright © 1998 by The American Society for Clinical Nutrition, Inc

ORIGINAL RESEARCH COMMUNICATIONS

Activity in vitro of resveratrol on granulocyte and monocyte adhesion to endothelium

ME Ferrero, AE Bertelli, A Fulgenzi, F Pellegatta, MM Corsi, M Bonfrate, F Ferrara, R De Caterina, L Giovannini and A Bertelli
Institute of General Pathology, Centro di Studio sulla Patologia Cellulare del Consiglio Nazionale delle Ricerche, Milan, Italy. mefer@imiucca.csi.unimi.it

BACKGROUND: Resveratrol is a phytoalexin present in red wine. It has been shown to protect LDL from peroxidative degradation. OBJECTIVE: In consideration of the low plasma concentration of orally adsorbed resveratrol (which is insufficient for antioxidant protection of LDL), we studied another effect of the compound. DESIGN: Because resveratrol is a tyrosine kinase inhibitor like other members of the tyrphostin family, we hypothesized that it has the ability to modify intracellular adhesion molecule 1 (ICAM-1) and vascular cell adhesion molecule 1 (VCAM-1) expression by stimulated endothelial cells. We studied the ability of resveratrol to inhibit such adhesion molecule expression and to block the adhesion of monocytes and granulocytes to endothelial cells. RESULTS: We showed that resveratrol, at concentrations as low as 1 micromol/L and 100 nmol/L, significantly inhibited ICAM-1 and VCAM-1 expression by tumor necrosis factor alpha (TNF-alpha)-stimulated human umbilical vein endothelial cells and lipopolysaccharide-stimulated human saphenous vein endothelial cells (HSVEC), respectively. In addition, we showed that resveratrol induced a significant inhibition in the adhesion of U937 monocytoid cells to lipopolysaccharide- stimulated HSVEC. Such inhibition was comparable with that obtained when anti-VCAM-1 monoclonal antibody was used instead of resveratrol. Resveratrol also significantly inhibited the adhesion of neutrophils to TNF-alpha-stimulated NIH/3T3 ICAM-1-transfected cells, whereas neutrophils activated by formyl-methionyl-leucyl-phenylalanine did not significantly modify adhesion to NIH/3T3 ICAM-1-transfected cells. CONCLUSIONS: Our results indicate activity of resveratrol on endothelial cells and a new interpretation of an effect independent of its antioxidant function.

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