Fig 3. DIO enhances the radiosensitivity of A549/IR cells.

(A) A549/IR cell lines were treated with indicated conditions for 24, 48, and 72 h. Cell viability was evaluated using the MTS assay. (B-C) A549/IR cells were treated by 10 μM DIO with or without 6 Gy IR. After 24 h, typical images of cell colony growth for the different treatments are shown. Values are the means ± SD of 3 replicates, *P < 0.05, **P < 0.01 compared with the control.