Figure 4

Stat3, p-Stat3, MMP-2 and VEGF protein expression in SW1990 and Capan-2 cells were detected by Western blotting. Protein samples extracted from SW1990 and Capan-2 cells treated for 24 hours with AG490 and interleukin-6 (IL-6), respectively, were subjected to western blotting for Stat3, p-Stat3, MMP-2, VEGF and β-actin proteins. AG490 and IL-6 did not affect total Stat3 protein levels. AG490 decreased p-Stat3, MMP-2 and VEGF protein expression in SW1990 cells(P = 0.010, P = 0.000, P = 0.009). IL-6 markedly increased p-Stat3, MMP-2 and VEGF protein expression in Capan-2 cells(P = 0.000, P = 0.011, P = 0.005). The levels of β-actin expression were determined as a control for equivalent protein loading.