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Induction of Apoptosis by Ethanol Extract of Cnidium officinale in Human Leukemia U937 Cells through Activation of AMPK
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  • Journal title : Journal of Life Science
  • Volume 25, Issue 11,  2015, pp.1255-1264
  • Publisher : Korean Society of Life Science
  • DOI : 10.5352/JLS.2015.25.11.1255
 Title & Authors
Induction of Apoptosis by Ethanol Extract of Cnidium officinale in Human Leukemia U937 Cells through Activation of AMPK
Jeong, Jin-Woo; Choi, Yung Hyun; Park, Cheol;
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Cnidium officinale, a traditional herb, has diverse beneficial pharmacological activities, such as anti-inflammatory, antioxidant, anticancer, and antiangiogenesis effects. However, the cellular and molecular mechanisms of apoptosis by C. officinale are poorly defined. The present study investigated the proapoptotic effects of water, ethanol, and methanol extract of C. officinale (WECO, EECO, and MECO, respectively) in human leukemia U937 cells. The antiproliferative activity of EECO was higher than that of WECO and MECO. The antiproliferative effect of EECO treatment in U937 cells was associated with the induction of apoptotic cell death, including increased populations of annexin-V positive cells, the formation of apoptotic bodies, DNA fragmentation, and increased numbers of cells with a loss of mitochondrial membrane potential (MMP, Δψm). EECO-induced apoptotic cell death was associated with upregulation of death receptor 4 (DR4) and down-regulation of cellular inhibitor of apoptosis protein-1 (cIAP-1), Bcl-2, and total Bid. The EECO treatment also induced the proteolytic activation of caspases (-3, -8, and -9), and degradation of caspase-3 substrate proteins, such as poly(ADP-ribose) polymerase (PARP), β-catenin, and phospholipase C-γ1 (PLCγ1). In addition, the EECO treatment effectively activated the adenosine monophosphate-activated protein kinase (AMPK) signaling pathway. However, compound C, a specific inhibitor of AMPK, significantly reduced EECO-induced apoptosis. These results indicate that AMPK is a key regulator of apoptosis in response to EECO in human leukemia U937 cells.
AMPK;apoptosis;Cnidium officinale;U937 cells;
 Cited by
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