Amentoflavone Inhibits Metastatic Potential Through Suppression of ERK/NF-κB Activation in Osteosarcoma U2OS Cells

Area of Science:

• Molecular Biology
• Cancer Research
• Pharmacology

Background:

• Osteosarcoma is a primary bone cancer with a high metastatic potential.
• Nuclear factor-kappa B (NF-κB) signaling pathways are implicated in cancer progression and metastasis.
• Amentoflavone, a natural flavonoid, has demonstrated potential anti-cancer properties.

Purpose of the Study:

• To investigate the effect of amentoflavone on NF-κB-modulated metastatic mechanisms in osteosarcoma U2OS cells.
• To elucidate the role of extracellular signal-regulated kinases (ERK) in amentoflavone's anti-metastatic activity.

Main Methods:

• Osteosarcoma U2OS cells were treated with amentoflavone, NF-κB inhibitors, protein kinase B (PKB/AKT) inhibitors, or mitogen-activated protein kinase (MAPK) inhibitors.
• Cell viability was assessed using the MTT assay.
• NF-κB activation, ERK phosphorylation, metastasis-associated protein expression, and cell migration/invasion were evaluated using reporter gene assays, western blotting, and cell-based assays.

Main Results:

• Amentoflavone significantly inhibited NF-κB activation, ERK phosphorylation, and the expression of metastasis-associated proteins.
• Amentoflavone treatment led to a significant reduction in osteosarcoma cell migration and invasion.
• Inhibition of ERK activation was identified as a critical factor in suppressing NF-κB-mediated metastasis.

Conclusions:

• Amentoflavone effectively reduces the metastatic potential of osteosarcoma cells.
• The anti-metastatic effect of amentoflavone is mediated through the suppression of both ERK and NF-κB activation pathways.
• Amentoflavone represents a promising therapeutic agent for targeting osteosarcoma metastasis.