Eeded to 6-well plates and allowed to adhere overnight. The following day, cells were mock-infected or infected with the indicated titers of Ad-IGFBP3 or Ad-EV for 2 hours and then incubated in complete medium. The next day, cells were exposed to imatinib for 48 hours before being assayed for changes in cell viability. MTS assay Cell viability was assessed using the 3-(4,5-dimethylthiazol-2-yl)-5-