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Related Experiment Video

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On-Chip Endothelial Inflammatory Phenotyping
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Flavanone metabolites decrease monocyte adhesion to TNF-α-activated endothelial cells by modulating expression of

Audrey Chanet1, Dragan Milenkovic, Sylvain Claude

  • 1INRA, UMR 1019, UNH, CRNH Auvergne, F-63000 Clermont-Ferrand, France.

The British Journal of Nutrition
|January 22, 2013
PubMed
Summary

Citrus flavanone metabolites, like naringenin and hesperetin, reduce inflammatory monocyte adhesion to endothelial cells. This action, by modulating key gene expression, offers insight into flavanones' vascular protective benefits.

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Cardiovascular Research

Background:

  • Flavanones, abundant in citrus fruits, are known for vascular benefits.
  • Cellular and molecular mechanisms of flavanones in vascular cells remain largely unexplored.

Purpose of the Study:

  • To investigate the impact of flavanone metabolites on endothelial cells.
  • To elucidate the molecular mechanisms underlying flavanone action in vascular cells.

Main Methods:

  • Assessed the effect of naringenin and hesperetin metabolites on monocyte adhesion to TNF-α-activated human umbilical vein endothelial cells (HUVEC).
  • Analyzed gene expression changes using TaqMan Low-Density Array following flavanone metabolite exposure.

Main Results:

  • Specific flavanone metabolites significantly attenuated monocyte adhesion to activated HUVEC.
  • Naringenin-4'-glucuronide (N4'G) and naringenin-7-glucuronide (N7G) showed a pronounced inhibitory effect on monocyte adhesion.
  • Flavanone metabolites modulated gene expression related to inflammation, cell adhesion, and cytoskeletal organization.

Conclusions:

  • Physiologically relevant concentrations of flavanone metabolites reduce monocyte adhesion to stimulated endothelial cells.
  • The observed effects are mediated through the modulation of specific gene expression pathways.
  • These findings provide a molecular basis for the vasculoprotective effects attributed to dietary flavanones.