Tier 3 — preclinical

Natural polyphenols as sirtuin 6 modulators

Minna Rahnasto-Rilla, Jonna Tyni, Marjo Huovinen, Elina Jarho, Tomasz Kulikowicz, Sarangan Ravichandran, Vilhelm A Bohr, Luigi Ferrucci, Maija Lahtela-Kakkonen, Ruin Moaddel
Scientific Reports 2018 8(1):4163

Bibliography

PubMed
PMID 29515203
PubMed Central
PMC5841289
Funding
Supported by the Intramural Research Program of the National Institute on Aging, NIH; Academy of Finland grant 269341; Orion-Farmos Research Foundation; Saastamoinen Foundation; Finnish Cultural Foundation; and NCI federal funds under contract HHSN261200800001E.
Competing interests
The authors declared no competing interests.

Study snapshot

DesignBiochemical screening, docking and cell-based SIRT6-expression study of flavonoids.
ModelPurified SIRT6 assays, histone substrates and Caco-2 cells.
SampleNot applicable; biochemical/cell experiments.
InterventionMultiple natural polyphenols including cyanidin, delphinidin and catechin derivatives.
DurationAssay-dependent.
EndpointsSIRT6 deacetylase activity; activation/inhibition fold change; SIRT6 expression in Caco-2 cells; molecular docking

What the study showed, in plain terms

This paper is the key natural-polyphenol SIRT6 screen. Cyanidin produced the strongest biochemical activation signal, while some catechin-gallate compounds inhibited SIRT6; cyanidin also increased SIRT6 expression in Caco-2 cells.

Key findings

Cyanidin produced up to a 55-fold activation signal in the biochemical assay, substantially exceeding the other tested activators.

What this study can and cannot tell us

The large fold-change comes from an in-vitro assay at relatively high concentrations and should not be translated into comparable human supplementation effects.

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