Alpha-chaconine-reduced metastasis involves a PI3K/Akt signaling pathway with downregulation of NF-kappaB in human lung adenocarcinoma A549 cells.
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.
Institute of Biochemistry and Biotechnology, Chung Shan Medical University, Taichung, Taiwan, Republic of China.
Yuan-Wei
YW
Shih
Pin-Shern
PS
Chen
Cheng-Hsun
CH
Wu
Ya-Fang
YF
Jeng
Chau-Jong
CJ
Wang
D000972:Antineoplastic Agents, Phytogenic / Q000494:pharmacology*; D016923:Cell Death / Q000187:drug effects; D045744:Cell Line, Tumor; D004247:DNA / Q000378:metabolism; D006801:Humans; D008175:Lung Neoplasms; D016328:NF-kappa B / Q000187:drug effects* / Q000378:metabolism; D009361:Neoplasm Invasiveness / Q000517:prevention & control; D009362:Neoplasm Metastasis / Q000517:prevention & control*; D019869:Phosphatidylinositol 3-Kinases / Q000378:metabolism*; D010766:Phosphorylation / Q000187:drug effects; D051057:Proto-Oncogene Proteins c-akt / Q000378:metabolism*; D015398:Signal Transduction / Q000187:drug effects; D012992:Solanine / Q000031:analogs & derivatives* / Q000494:pharmacology
D000972:Antineoplastic Agents, Phytogenic; D016328:NF-kappa B; D012992:Solanine; C011860:alpha-chaconine; D004247:DNA; D019869:Phosphatidylinositol 3-Kinases; D051057:Proto-Oncogene Proteins c-akt