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JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
Alpha-chaconine-reduced metastasis involves a PI3K/Akt signaling pathway with downregulation of NF-kappaB in human lung adenocarcinoma A549 cells.
Journal of Agricultural and Food Chemistry 2007 December 27
Alpha-chaconine, isolated from Solanum tuberosum Linn., is a naturally occurring steroidal glycoalkaloid in potato sprouts. Some reports demonstrated that alpha-chaconine had various anticarcinogenic properties. The aim of this study is to investigate the inhibitory effect of alpha-chaconine on lung adenocarcinoma cell metastasis in vitro. We chose the highly metastatic A549 cells, which were treated with various concentrations of alpha-chaconine to clarify the potential of inhibiting A549 cells invasion and migration. Data showed that alpha-chaconine inhibited A549 cell invasion/migration according to wound healing assay and Boyden chamber assay. Our results also showed that alpha-chaconine could inhibit phosphorylation of c-Jun N-terminal kinase (JNK) and Akt, whereas it did not affected phosphorylation of extracellular signal regulating kinase (ERK) and p38. In addition, alpha-chaconine significantly decreased the nuclear level of nuclear factor kappa B (NF-kappaB) and the binding ability of NF-kappaB. These results suggested that alpha-chaconine inhibited A549 cell metastasis by a reduction of matrix metalloproteinase-2 (MMP-2) and matrix metalloproteinase-9 (MMP-9) activities involving suppression of phosphoinositide 3-kinase/Akt/NF-kappaB (PI3K/Akt/NF-kappaB) signaling pathway. Inhibiting metastasis by alpha-chaconine might offer a pivotal mechanism for its effective chemotherapeutic action.
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