Overexpression of PRAF3 suppresses the activity of MMP-2 and the expression of integrin aV and b3. 1.0 × 106 Eca109 and TE-1 cells were infected with Ad.PRAF3 (or Ad.Null) at a MOI of 100. The activity of MMP-2 in supernatants, and the expression of MMP-2, integrin aV and integrin b3 were detected at 72 hr post-infection. (A) The activity of MMP-2 was detected by zymography assay and the activity of the Ad.Null-infected cells was defined as 1. Photographs represented the gelatin zymography and histograms showed the activity of MMP-2 in Ad.PRAF3-infected and Ad.Null-infected ESCC cells. (B-D) The expression of MMP-2, integrin aV and integrin b3 were detected by western blot and normalized to that of β-actin. Photographs showed the western blot products and histograms showed the expression level of MMP-2 (B), integrin aV (C) and integrin b3 (D) protein in Ad.PRAF3-infected and Ad.Null-infected ESCC cells. Bars = 100 μm. Data represent mean ± SEM from 4 independent experiments; *, P < 0.05, **, P < 0.01 by t test.
Shi et al. BMC Cancer 2012 12:97 doi:10.1186/1471-2407-12-97