Src-dependent cellular invasion is transiently increased by gefitinib. Real time cell invasion was continuously monitored in SKBR3 cells treated with serum-free medium (negative control, NC), 10% FBS (positive control, PC), 1 μM gefitinib (GE), 1.5 μM CI-1033 (CI-1033), 1 μM 17-AAG (GA), 0.5 μM dasatinib (DA), or the combination 1 μM gefitinib with 0.5 μM dasatinib (GE + DA). Data are expressed as mean cumulative invasion (+/− SD) at 15 hours and at 72 hours after initiation of the experiment.