Pomegranate-Derived Polyphenols Reduce Reactive Oxygen Species Production via SIRT3-Mediated SOD2 Activation

الملخص EN

Pomegranate-derived polyphenols are expected to prevent life-style related diseases.

In this study, we evaluated the ability of 8 pomegranate-derived polyphenols, along with other polyphenols, to augment SIRT3, a mammalian SIR2 homolog localized in mitochondria.

We established a system for screening foods/food ingredients that augment the SIRT3 promoter in Caco-2 cells and identified 3 SIRT3-augmenting pomegranate-derived polyphenols (eucalbanin B, pomegraniin A, and eucarpanin T1).

Among them, pomegraniin A activated superoxide dismutase 2 (SOD2) through SIRT3-mediated deacetylation, thereby reducing intracellular reactive oxygen species.

The other SIRT3-augmenting polyphenols tested also activated SOD2, suggesting antioxidant activity.

Our findings clarify the underlying mechanisms involved in the antioxidant activity of pomegraniin A.