Abstract
Acacetin (5,7-dihydroxy-4′-methoxyflavone), a flavonoid compound, has anti-peroxidative and anti-inflammatory effects. The effect of acacetin on antimetastasis in human prostate cancer DU-145 cells was investigated. First, the result demonstrated acacetin could exhibit an inhibitory effect on the abilities of the adhesion, invasion, and migration by cell–matrix adhesion assay, wound-healing assay, and Boyden chamber assay. Data also showed acacetin could inhibit the phosphorylation of p38 mitogen-activated protein kinase (p38 MAPK) involved in the downregulation of the expressions of matrix metalloproteinase-2 (MMP-2), matrix metalloproteinase-9 (MMP-9), and urokinase-type plasminogen activator (u-PA) at both the protein and mRNA levels. Next, acacetin significantly decreased the nuclear levels of nuclear factor kappa B (NF-κB), c-Fos, and c-Jun. Also, the treatment with acacetin to DU145 cells also leads to a dose-dependent inhibition on the binding ability of NF-κB and activator protein-1 (AP-1). Furthermore, the treatment of inhibitors specific for p38 MAPK (SB203580) to DU145 cells could cause reduced expressions of MMP-2, MMP-9, and u-PA. These results showed acacetin could inhibit the invasion and migration abilities of DU145 cells by reducing MMP-2, MMP-9, and u-PA expressions through suppressing p38 MAPK signaling pathway and inhibiting NF-κB- or AP-1-binding activity. These findings proved acacetin might be offered further application as an antimetastatic agent.
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Abbreviations
- MMPs:
-
Matrix metalloproteinases
- u-PA:
-
Urokinase-type plasminogen activator
- ECM:
-
Extracellular matrix
- ERK:
-
Extracellular signal-regulated kinase
- JNK/SAPK:
-
c-Jun N-terminal kinase/stress-activated protein kinase
- p38 MAPK:
-
p38 Mitogen-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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Acknowledgment
This work was supported by the grant from the Subsidized Project of the Chung Hwa University, Tainan, Taiwan (97-HT-08008).
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Shen, KH., Hung, SH., Yin, LT. et al. Acacetin, a flavonoid, inhibits the invasion and migration of human prostate cancer DU145 cells via inactivation of the p38 MAPK signaling pathway. Mol Cell Biochem 333, 279–291 (2010). https://doi.org/10.1007/s11010-009-0229-8
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DOI: https://doi.org/10.1007/s11010-009-0229-8