Details

Autor(en) / Beteiligte

• Tang, Jeffry S.
• Vissers, Margreet C. M.
• Anderson, Robert F.
• Sreebhavan, Sreevalsan
• Bozonet, Stephanie M.
• Scheepens, Arjan
• Melton, Laurence D.

Titel

Bioavailable Blueberry‐Derived Phenolic Acids at Physiological Concentrations Enhance Nrf2‐Regulated Antioxidant Responses in Human Vascular Endothelial Cells

Ist Teil von

• Molecular nutrition & food research, 2018-03, Vol.62 (5), p.n/a

Ort / Verlag

Germany: Wiley Subscription Services, Inc

Erscheinungsjahr

2018

Quelle

Wiley-Blackwell Journals

Beschreibungen/Notizen

• Scope Blueberry consumption is believed to confer a cardiovascular health advantage, but the active compounds and effects require characterization. This study aims to identify the polyphenol metabolites in plasma after blueberry juice intake and determine their bioactivity on endothelial cells. Methods and results Three healthy individuals are recruited to obtain profiles of bioavailable plasma polyphenol metabolites following intake of blueberry juice. Of 33 phenolic compounds screened, 12 aglycone phenolic acids are detected and their maximum plasma concentrations and circulation time determined. Using this information, the effect of three physiologically relevant mixtures of blueberry‐derived phenolic acids is investigated for their ability to induce nuclear factor erythroid 2‐related factor 2 (Nrf2)‐nuclear translocation and downstream gene expression in human endothelial cells. Pretreatment with the phenolic acids for 18 h results in a significant upregulation of the Nrf2‐regulated antioxidant response proteins heme oxygenase 1 (HO‐1) and glutamate‐cysteine ligase modifier subunit (GCLM), following 6 h exposure to 2.5 μm H2O2. Conclusion Physiologically relevant concentrations of blueberry‐derived aglycone phenolic acids can induce Nrf2‐regulated antioxidant response proteins in vascular endothelial cells in response to low μm concentrations of H2O2. Our results represent an advance over previous studies that have used single compounds or high concentrations in cell‐based investigations. In this study, phenolic acids in the plasma of individuals after blueberry juice consumption are profiled, and the information is used to investigate the effect of these compounds at physiological plasma concentrations on Nrf2‐regulated responses in human endothelial cells.