Abstract
Hepatocyte growth factor (HGF) is one of the survival factors with a potent ability to promote cell survival by inhibiting apoptosis. However, the mechanism by which HGF inhibits apoptosis is not completely understood. To explore the genes associated with stomach cancer cell survival by HGF, we used cDNA microarray technology and selected 26 genes up- or downregulated in NUGC-3 cells during HGF treatment. Among them, BAD was confirmed to be upregulated at the RNA and protein levels by HGF treatment. We investigated the effect of BAD induced by HGF on cell survival. HGF treatment inhibited apoptosis induced by BAD overexpression and enhanced BAD phosphorylation. Pretreatment of NUGC-3 cells with PI3K inhibitors, LY 294002, decreased HGF-induced BAD phosphorylation on Ser136 whereas an MEK inhibitor, PD 98059, decreased BAD phosphorylation on Ser112. In conclusion, increases in BAD levels as well as BAD phosphoryation by HGF might contribute to HGF-mediated cell survival in NUGC-3 cells.
Published Version
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