Abstract
α-Tomatine, isolated from Lycopersicon esculentum Linn., is a naturally occurring steroidal glycoalkaloid in immature green tomatoes. Some reports demonstrated that α-tomatine had various anticarcinogenic properties. The purpose of this study is to investigate the anti-metastatic effect of α-tomatine in NCI-H460 human non-small cell lung cancer cells. First, the results showed that α-tomatine significantly suppressed the abilities of the adhesion, invasion, and migration of NCI-H460 cells under non-cytotoxic concentrations. Molecular data also showed α-tomatine could inhibit the activation of focal adhesion kinase (FAK) and phosphatidylinositol 3-kinase (PI3K)/Akt signal involve in the downregulation the enzyme activities, protein and messenger RNA levels of matrix metalloproteinase-7 (MMP-7). Next, α-tomatine also strongly inhibited the degradation of inhibitor of kappaBα (IκBα) and the nuclear levels of nuclear factor kappa B (NF-κB). Also, a dose-dependent inhibition on the binding ability of NF-κB by α-tomatine treatment was further observed. Furthermore, α-tomatine significantly decreased the levels of phospho-Akt and MMP-7 in Akt1-cDNA-transfected cells concomitantly with a marked reduction on cell invasion and migration. Presented results indicated α-tomatine might be further application for treating cancer metastasis.
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Abbreviations
- MMPs:
-
Matrix metalloproteinases
- ECM:
-
Extracellular matrix
- MAPK:
-
Mitogen-activated protein kinase
- ERK:
-
Extracellular signaling-regulating kinase
- JNK/SAPK:
-
c-Jun N-terminal kinase/stress-activated protein kinase
- PI3K:
-
Phosphoinositide 3-kinase
- NF-κb:
-
Nuclear factor kappa B
- AP-1:
-
Activator protein-1
- IκB:
-
Inhibitor of NF-κB
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Shieh, JM., Cheng, TH., Shi, MD. et al. α-Tomatine Suppresses Invasion and Migration of Human Non-Small Cell Lung Cancer NCI-H460 Cells Through Inactivating FAK/PI3K/Akt Signaling Pathway and Reducing Binding Activity of NF-κB. Cell Biochem Biophys 60, 297–310 (2011). https://doi.org/10.1007/s12013-011-9152-1
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DOI: https://doi.org/10.1007/s12013-011-9152-1