Endoplasmic reticulum stress sensitizes human esophageal cancer cell to radiation

Figure 2 Cell cycle arrest induced by tunicamycin. A: EC109 cells were pretreated with or without tunicamycin (TM) (0.5 μg/mL), followed by a single dose of 10 Gy. 24 h later, cells were harvested, fixed, and labeled with propidium iodide. Cell cycle distributions were analyzed on a FACSort; B: Data are the mean ± SD of three independent experiments. N: Sham-treated with TM; R: 10 Gy irradiation.