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Abstract Title:

DNA catabolites in triathletes: effects of supplementation with an aronia-citrus juice (polyphenols-rich juice).

Abstract Source:

Food Funct. 2016 Apr 20 ;7(4):2084-93. PMID: 27050256

Abstract Author(s):

Libia Alejandra García-Flores, Sonia Medina, Roberto Cejuela-Anta, José Miguel Martínez-Sanz, Ángel Abellán, Hans-Gottfried Genieser, Federico Ferreres, Ángel Gil-Izquierdo

Article Affiliation:

Libia Alejandra García-Flores

Abstract:

In this study we analyzed whether our aronia-citrus juice (ACJ, the composition is based on a mixture of 95% citrus juice with 5% of Aronia melanocarpa juice), rich in polyphenols, and physical exercise had an effect on seven catabolites of DNA identified in plasma and on a urine isoprostane (8-iso-PGF2α). Sixteen elite triathletes on a controlled diet for triathlon training (45 days) were used in this clinical trial. Our results show a decrease in the 8-hydroxy-2'-deoxyguanosine concentration due to chronic physical exercise. The ACJ intake and physical exercise maintained the guanosine-3',5'-cyclic monophosphate plasmatic concentrations and decreased the concentration of 8-hydroxyguanine as well as urinary values of 8-iso-PGF2α. Finally, we observed a significant increase in the 8-nitroguanosine levels in triathletes after ACJ intake, compared to the placebo stage. It is concluded that the combination of the intake of ACJ, rich in polyphenolic compounds, with adequate training was able to influence the plasmatic and urinary values of oxidative stress biomarkers. This suggests a positive effect on the oxidative damage and potential associations with DNA repair mechanisms.

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