Signatures of anthocyanin metabolites identified in humans inhibit biomarkers of vascular inflammation in human endothelial cells

Warner, E.F., Smith, M.J., Zhang, Q., Raheem, S., O’Hagan, D., O'Connell, M.A. and Kay, C.D. 2017. Signatures of anthocyanin metabolites identified in humans inhibit biomarkers of vascular inflammation in human endothelial cells. Molecular Nutrition & Food Research. 61 (9) 1700053. https://doi.org/10.1002/mnfr.201700053

TitleSignatures of anthocyanin metabolites identified in humans inhibit biomarkers of vascular inflammation in human endothelial cells
TypeJournal article
AuthorsWarner, E.F.
Smith, M.J.
Zhang, Q.
Raheem, S.
O’Hagan, D.
O'Connell, M.A.
Kay, C.D.
Abstract

Scope
The physiological relevance of contemporary cell culture studies is often perplexing, given the use of unmetabolized phytochemicals at supraphysiological concentrations. We investigated the activity of physiologically relevant anthocyanin metabolite signatures, derived from a previous pharmacokinetics study of 500 mg 13C5-cyanidin-3-glucoside in 8 healthy participants, on soluble vascular adhesion molecule-1 (VCAM-1) and interleukin-6 (IL-6) in human endothelial cells.

Methods and results
Signatures of peak metabolites (previously identified at 1, 6 and 24 h post-bolus) were reproduced using pure standards and effects were investigated across concentrations ten-fold lower and higher than observed mean (<5 μM) serum levels. Tumor necrosis factor-α (TNF-α)-stimulated VCAM-1 was reduced in response to all treatments, with maximal effects observed for the 6 h and 24 h profiles. Profiles tested at ten-fold below mean serum concentrations (0.19-0.44 μM) remained active. IL-6 was reduced in response to 1, 6 and 24 h profiles, with maximal effects observed for 6 h and 24 h profiles at concentrations above 2 μM. Protein responses were reflected by reductions in VCAM-1 and IL-6 mRNA, however there was no effect on phosphorylated NFκB-p65 expression.

Conclusion
Signatures of anthocyanin metabolites following dietary consumption reduce VCAM-1 and IL-6 production, providing evidence of physiologically relevant biological activity.

Article number1700053
JournalMolecular Nutrition & Food Research
Journal citation61 (9)
ISSN1613-4125
Year2017
PublisherWiley
Accepted author manuscript
Digital Object Identifier (DOI)https://doi.org/10.1002/mnfr.201700053
Publication dates
Published online29 Apr 2017
Published29 Apr 2017
Published in printSep 2017

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