Effects of CD147 specific shRNA on invasion of SGC7901 cells. (A)Crystal violet staining results of the lower surface filters showed that the cells passed through the filter and attached to the lower side of the filter (400×). (B) The average number of cells that invaded through the filter was counted. The data were obstained from three independent experiments. *p < 0.01 compared with SGC7901 and SGC7901/shRNA-control.