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• W2080302526 abstract "Abstract In a previous report, we showed that the in vivo cytotoxic activity of the natural killer (NK) cells isolated from resveratrol‐pretreated rats is significantly enhanced compared with that of the non‐pretreated rats; however, the underlying mechanism remains unclear. In the present study, we use cultured NK92 cell line to examine the possible signaling pathways underlying the resveratrol‐induced activation. Using cultured K562, HepG2, and A549 cells as targets, we show that resveratrol pretreatment increases NK cell cytotoxicity in a dose‐dependent manner. The enhanced cytotoxic effect is accompanied by increases in JNK and ERK‐1/2 MAP kinase activity and perforin expression. Moreover, the expression of NKG2D, an upstream signaling molecule of the MAP kinases pathway, is also enhanced. Resveratrol‐enhanced perforin expression and cytotoxic activity are effectively inhibited by pretreatment with the inhibitors of JNK (SP600125), ERK‐1/2 (PD98059), or by siRNAs against JNK‐1 and ERK‐2. However, the inhibitors or siRNA to p38 exhibits no effect. Since IL‐2 has been shown to induce NKG2D expression and perforin release, we therefore, examined whether IL‐2 and resveratrol act in parallel. We show that IL‐2 also stimulates perforin expression, however, when treated together with resveratrol, they exhibit no additive effect. The results suggest that in NK92 cells, resveratrol may act via a similar or overlapping pathway as that of IL‐2, to enhance perforin expression and cytotoxic activity. Data presented strongly indicate that resveratrol act via NKG2D‐dependent JNK and ERK‐1/2 pathways. J. Cell. Physiol. 223: 343–351, 2010. © 2010 Wiley‐Liss, Inc." @default.
• W2080302526 created "2016-06-24" @default.
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• W2080302526 date "2010-01-15" @default.
• W2080302526 modified "2023-10-16" @default.
• W2080302526 title "Resveratrol enhances perforin expression and NK cell cytotoxicity through NKG2D-dependent pathways" @default.
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• W2080302526 doi "https://doi.org/10.1002/jcp.22043" @default.
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