Resveratrol induces FasL-related apoptosis through Cdc42 activation of ASK1/JNK-dependent signaling pathway in human leukemia HL-60 cells

Carcinogenesis
Jen-Liang SuMin-Liang Kuo

Abstract

Trans-resveratrol, a phytoalexin found at high levels in grapes and in grape products such as red wine, has been shown to prevent carcinogenesis or antitumor growth in murine models. Here we dissect the detailed signaling pathway involved in resveratrol-induced apoptosis. Our data showed that treatment with resveratrol-induced activation of apoptosis signal-regulating kinase 1, a mitogen-activated protein kinase kinase kinase, in turn, activated the downstream kinases c-Jun N-terminal kinase and p38 mitogen-activated protein kinase, but not extracellular signal-regulated kinase. Transfection with a dominant-negative c-Jun N-terminal kinase expression vector reduced FasL expression and DNA fragmentation induced by resveratrol. However, inhibition of p38 mitogen-activated protein kinase activity by treatment with SB203580 (p38 mitogen-activated protein kinase specific inhibitor) or expression of mutant p38 mitogen-activated protein kinase expression vector did not alter the apoptosis and FasL expression in response to resveratrol. Furthermore, genetic inhibition of apoptosis signal-regulating kinase 1 signaling inhibited not only the activation of c-Jun N-terminal kinase, but also the expression of FasL and apoptosis. Similarly, ...Continue Reading

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