Abstract
We have previously reported that Bcl-w enhances the invasiveness of gastric cancer cells by inducing MMP-2 expression via phosphoinositide 3-kinase (PI3K), Akt and Sp1. This study demonstrates that Bcl-w additionally induces uPA expression and FAK activation. Analyses of the hierarchical relationship and functions of these components showed that the PI3K-Akt-Sp1 pathway also mediates the induction of uPA, and that both uPA and MMP-2 contribute to Bcl-w-induced invasion via the stimulation of the FAK-dependent migratory pathway. These findings significantly advance our understandings of the Bcl-w-induced signaling processes that results in the migration and invasion of cancer cells.
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