Journal: BMC cancer
Article Title: Functional deficiency of NBN, the Nijmegen breakage syndrome protein, in a p.R215W mutant breast cancer cell line.
doi: 10.1186/1471-2407-14-434
Figure Lengend Snippet: Figure 2 Assessment of cellular radiosensitivity in the colony formation assay. A. Cellular radiosensitivity of p.R215W mutant cells (HCC1395) compared with wild type breast epithelial cells (MCF10A) as measured by the colony formation assay after irradiation at doses of 0, 0.1, 0.25, 0.5 or 1Gy. The surviving fraction is presented as the mean value with SEM from at least 3 independent experiments. B. Induction of PARP1 cleavage after irradiation with 2 Gy in p.R215W mutant cells (HCC1395) compared with wild type breast epithelial cells (MCF10A) as measured by immunoblotting of cleaved PARP1 (89 kDa) and total PARP1 (116 kDa). C. Immunoblot analysis of radiation-induced ATM signalling in HCC1395 cells compared with MCF10A. Cells were untreated or irradiated with 0.5, 1, 2, 4 or 6 Gy as indicated. Protein extracts were prepared 30 min after irradiation and were analysed through Western blotting for their immunoreactivity towards the phosphorylated forms of SMC1 (pSer966, top panel), KAP1 (p824, middle panel), and CHEK2 (pSer19, bottom panel). β-actin served as the loading control in each experiment.
Article Snippet: Antibodies to NBN, SMC1pS966, KAP1-pS824 were obtained from Novus Biologicals (rabbit polyclonal); anti CHEK2-pS19 from Cell Signaling (rabbit polyclonal); anti RAD50 (mouse monoclonal) from Abcam; anti MRE11 (mouse monoclonal 12D7) from GeneTex; PARP1 and cleaved PARP1 (rabbit polyclonal) from Cell Signaling, and anti β-Actin (mouse monoclonal) from Sigma.
Techniques: Colony Assay, Mutagenesis, Irradiation, Western Blot, Control