ex-527 and epsilon-viniferin

Red wine compounds have been reported to reduce the rate of atherosclerosis by inducing nitric oxide (NO) production and antioxidant enzyme expression in vascular endothelial cells (VECs). The present study compared the effects of the three red wine compounds resveratrol and its dimers, ε-viniferin and δ-viniferin, on VECs function for the first time. Both 5 μM ε-viniferin and δ-viniferin, but not 5 μM resveratrol, significantly stimulated wound repair of VECs. Increased levels of wound repair induced by 10 and 20 μM ε-viniferin were significantly higher than those stimulated by 10 and 20 μM resveratrol, respectively. These stimulatory effects of the three compounds were suppressed by the NO synthase inhibitor L-NAME. When VECs were exposed to each compound, endothelial NO synthase was activated and the expression of sirtuin 1 (SIRT1) and HO-1 was induced. Addition of the SIRT1 and HO-1 inhibitors EX527 and ZnPPiX, respectively, suppressed wound repair stimulated by the three compounds, demonstrating that SIRT1 and HO-1 are involved in these wound repair processes. Furthermore, each compound induced the suppression of H

Topics: Animals; Antioxidants; Atherosclerosis; Benzofurans; Carbazoles; Catalase; Cell Line; Cell Survival; Dimerization; Endothelial Cells; Enzyme Inhibitors; Gene Expression Regulation; Heme Oxygenase-1; Humans; NG-Nitroarginine Methyl Ester; Nitric Oxide; Nitric Oxide Synthase Type III; Protoporphyrins; Resorcinols; Resveratrol; Sirtuin 1; Stilbenes; Swine; Wine