Effect of tannic acid, resveratrol and its derivatives, on oxidative damage and apoptosis in human neutrophils.
In this study we compared the antioxidant and DNA protective activity of tannic acid and stilbene derivatives, resveratrol, 3,5,4(')-trimethoxystilbene (TMS) and pterostilbene in human neutrophils stimulated to oxidative burst by 12-O-tetradecanoyl-phorbol-13-acetate (TPA) in relation to apoptosis induction. All polyphenols within the concentration range 1-100 μM reduced the intracellular ROS and H2O2 production in the TPA-stimulated cells. Tannic acid was the most effective polyphenol in protection against DNA damage induced by TPA. In the resting neutrophils resveratrol and to lesser extent other polyphenols increased DNA damage and increased the level of p53. Pretreatment of the TPA-stimulated cells with tannic acid or stilbenes led to the induction of apoptosis. The most significant effect was observed as a result of treatment with TMS and resveratrol. These compounds appeared the most effective inducers of p53 in the TPA-challenged neutrophils, what may suggest that pro-apoptotic activity of these stilbenes might be related to p53 activation. Overall, the results of our present study demonstrate that tannic acid and stilbenes modulate the ROS production, ultimately leading to cell apoptosis in human neutrophils stimulated to oxidative burst. In resting neutrophils they exhibit pro-oxidant activity, which is accompanied by p53 induction.
['Zielińska-Przyjemska|Małgorzata|M|', 'Ignatowicz|Ewa|E|', 'Krajka-Kuźniak|Violetta|V|', 'Baer-Dubowska|Wanda|W|']
D000894:Anti-Inflammatory Agents, Non-Steroidal D000975:Antioxidants D017209:Apoptosis D015415:Biomarkers D002273:Carcinogens D002478:Cells, Cultured D004249:DNA Damage D006801:Humans D006861:Hydrogen Peroxide D018375:Neutrophil Activation D009504:Neutrophils D016877:Oxidants D018384:Oxidative Stress D017382:Reactive Oxygen Species D000077185:Resveratrol D013267:Stilbenes D013634:Tannins D013755:Tetradecanoylphorbol Acetate D016159:Tumor Suppressor Protein p53
Tannic acid Apoptosis Neutrophils Stilbene derivatives DNA damage