FIG.7.
Infection with RSV sensitizes cells to TRAIL-induced apoptosis. RSV-infected or mock-infected A549 cells were treated for 5 h, beginning 24 h postinfection, with added TRAIL (500 ng/ml) in the presence of TRAIL-specific antibody or were mock treated. The cells were photographed to visualize TRAIL-induced apoptosis (panels at left) and collected and analyzed for apoptosis by annexin V staining (panels at right); the percentage of annexin V-positive-cells (bar) is indicated for each histogram. The experiment was performed four times, and representative data are shown.