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Abstract Title:

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

Abstract Source:

Oxid Med Cell Longev. 2016 ;2016:2927131. Epub 2016 Oct 20. PMID: 27840668

Abstract Author(s):

Chong Zhao, Takenori Sakaguchi, Kosuke Fujita, Hideyuki Ito, Norihisa Nishida, Akifumi Nagatomo, Yukimasa Tanaka-Azuma, Yoshinori Katakura

Article Affiliation:

Chong Zhao

Abstract:

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.

Study Type : In Vitro Study

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