title: Resveratrol induces FasL-related apoptosis through Cdc42 activation of ASK1/JNK-dependent signaling pathway in human leukemia HL-60 cells.
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, over-expression of wild-type apoptosis signal-regulating kinase 1 strengthened the resveratrol-induced c-Jun N-terminal kinase activation, FasL expression and subsequent apoptosis. These results suggest the possible involvement of apoptosis signal-regulating kinase 1/c-Jun N-terminal kinase signaling in the regulation of FasL expression and subsequent apoptosis induced by resveratrol in HL-60 cells. Resveratrol also activated the small GTP-binding protein Cdc42, rather than other members such as RhoA or Rac1. Expression of a mutant Cdc42 (N17 Cdc42) dramatically reduced resveratrol-induced c-Jun N-terminal kinase activity, FasL expression and apoptotic cell death. These results showed that resveratrol induced apoptosis through the Cdc42/apoptosis signal-regulating kinase 1/c-Jun N-terminal kinase/FasL signaling cascade in HL-60 cells.
authors.affiliation: Laboratory of Molecular and Cellular Toxicology, Institute of Toxicology, College of Medicine, National Taiwan University, Taipei, Taiwan.
authors.forename: Jen-Liang
authors.initials: JL
authors.lastname: Su
authors.forename: Ming-Tsan
authors.initials: MT
authors.lastname: Lin
authors.forename: Chih-Chen
authors.initials: CC
authors.lastname: Hong
authors.forename: Cheng-Chi
authors.initials: CC
authors.lastname: Chang
authors.forename: Shine-Gwo
authors.initials: SG
authors.lastname: Shiah
authors.forename: Cheng-Wen
authors.initials: CW
authors.lastname: Wu
authors.forename: Szu-Ta
authors.initials: ST
authors.lastname: Chen
authors.forename: Yat-Pang
authors.initials: YP
authors.lastname: Chau
authors.forename: Min-Liang
authors.initials: ML
authors.lastname: Kuo
mesh_terms: D020533:Angiogenesis Inhibitors / Q000494:pharmacology*; D017209:Apoptosis / Q000187:drug effects* / Q000502:physiology; D015153:Blotting, Western; D004789:Enzyme Activation / Q000187:drug effects / Q000502:physiology; D053222:Fas Ligand Protein; D005434:Flow Cytometry; D005455:Fluorescent Antibody Technique; D018922:HL-60 Cells; D006801:Humans; D047468:Immunoprecipitation; D048031:JNK Mitogen-Activated Protein Kinases / Q000187:drug effects / Q000378:metabolism; D048848:MAP Kinase Kinase Kinase 5 / Q000187:drug effects / Q000378:metabolism; D008562:Membrane Glycoproteins / Q000187:drug effects* / Q000378:metabolism; D000077185:Resveratrol; D015398:Signal Transduction / Q000187:drug effects / Q000502:physiology*; D013267:Stilbenes / Q000494:pharmacology*; D014162:Transfection; D020764:cdc42 GTP-Binding Protein / Q000187:drug effects / Q000378:metabolism*
chemical_list: D020533:Angiogenesis Inhibitors; C505661:FASLG protein, human; D053222:Fas Ligand Protein; D008562:Membrane Glycoproteins; D013267:Stilbenes; D048031:JNK Mitogen-Activated Protein Kinases; D048848:MAP Kinase Kinase Kinase 5; D020764:cdc42 GTP-Binding Protein; D000077185:Resveratrol