Breast cancer cell survival and cell cycle characterisation after irradiation. (A) Growth characteristics of T47D and MDA-MB-361 breast cancer cells were determined by MTT (WST1) assay 72 hours after irradiation. Data represent the means ± SD (n=4). *p <0.05, **p <0.01 by ANOVA one-way analysis of variance. (B) clonogenic survival of breast cancer cells 10 days after irradiation. (C) Cell cycle progression in breast cancer cells was evaluated by PI staining and flow cytometry 24 hours after irradiation at the indicated doses.