Effect of PI3K gene silencing on growth, migration and related proteins expression of CD40 signal-mediated gastric cancer cells

摘要

In this study, we investigate effect of PI3K gene silencing on growth, migration and related proteins expression of CD40 signal-mediated gastric cancer cells. We observed that combination of sCD40L with PI3K siRNA could significantly inhibit AGS cellsgrowth, block cells in G1 phase, and promote tumour cells apoptosis after 24 h treatment. Transwell test showed that numbers of cells per visual field in group PI3K siRNA or group sCD40L (after 24 h PI3K siRNA or sCD40L alone treatment) were fewer thanthat (32.54 ± 4.22) in control group. Numbers of cells per visual field in (after 24 h combination treatment of PI3K siRNA with sCD40L) were significantly fewer than that in group PI3K siRNA or group sCD40L. Compared with group sCD40L, expression levelof Fas protein in group sCD40L + PI3K siRNA was significantly increased. The findings suggest that PI3K siRNA may strengthen CD40-induced specific antitumour effect via blocking PI3K/Akt signal pathway, resisting tumour immunoediting regulated by CD40 signal. Combination of sCD40L and PI3K siRNA is an important mechanism of gastric cancer therapy.