Figure 2.
Effects of ABT-263 on the survival of irradiated cancer cells. (A) X-irradiated A549 and Ca9-22 cells were cultured for 24 h prior to the addition of ABT-263 to the culture. After further culture, the colony number was counted and the surviving fraction was calculated. (B) A549 and Ca9-22 cells were irradiated at 6 Gy. At 1, 2, and 4 days after irradiation, ABT-263 was added to the culture. After culture, the surviving fraction was calculated. Data are presented as the mean ± SD of independent experiments. * p < 0.05, ** p < 0.01.