Resveratrol improves TNF-alpha-induced endothelial dysfunction in a coculture model of a Caco-2 with an endothelial cell line

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toaldo I. M. , van camp J., gonzales G. B. , kamiloğlu S., BORDIGNON-LUIZ M. T. , smagghe G., ...More

JOURNAL OF NUTRITIONAL BIOCHEMISTRY, vol.36, pp.21-30, 2016 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Article
  • Volume: 36
  • Publication Date: 2016
  • Doi Number: 10.1016/j.jnutbio.2016.07.007
  • Journal Indexes: Science Citation Index Expanded, Scopus
  • Page Numbers: pp.21-30


The bioactivity of trans-resveratrol (RSV), an important wine polyphenol, and of its metabolites was investigated in a more relevant setup comprising an in vitro coculture cell model that combines intestinal absorption and conjugation with changes in endothelial function, which is primarily affected in cardiovascular diseases. Caco-2 and endothelial EA.hy926 cells were grown in a coculture, and Caco-2 cells were treated with RSV in the coculture and in two different sequential setups for 4 h and 24 h. Transported metabolites were investigated by UPLC MS/MSE, and the effects on NO production, ROS inhibition and secretion of vascular endothelial growth factor (VEGF), interleukin-8 (IL-8) and intercellular adhesion molecule-1 (ICAM-1) were evaluated in TNF-alpha-activated and nonactivated endothelial cells. RSV and four conjugated metabolites, two sulfates and two glucuronides, were identified after intestinal transport. In both coculture and sequential systems, RSV at 20 mu M strongly induced NO production. Changes in ROS and NO levels demonstrated a clear effect of crosstalk between cells in the coculture. The secretion of proinflammatory cytokines and VEGF was largely increased by treatment with TNF-alpha (inflammatory condition). The polyphenol intervention significantly reduced the levels of VEGF, ROS, IL-8 and ICAM-1, with a more pronounced effect in TNF-alpha-activated endothelial cells. In conclusion, RSV and its metabolites showed accentuated bioactivity on TNF-alpha-induced inflammation, and the metabolism of endothelial cells as a biological target was not only influenced by these phenolics but also by the communication between distinct cell lines, showing a new perspective for investigations on polyphenol intervention and its biological outcomes. (C) 2016 Elsevier Inc. All rights reserved.