Figure 5

Combination of imatinib with irradiation reduces breast cancer cell growth in vitro. Cells were incubated with imatinib alone, received irradiation of 2 Gy per day for 5 days or the combination of both. Colony-forming tests were performed and the surviving fraction was calculated dividing the number of colonies of treated cells by the number of colonies of non radiated control cells. Representative colonies of MCF 7 cells are shown.