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Apoptosis of NSCLC A549 cells after ionizing radiation (IR). Apoptosis in anti-miR-21- (or anti-miR-NC-) transfected A549 cells combined with (or without) IR (8.0 Gy) was detected through annexin V-FITC/PI staining by flow cytometric analysis. The data represent the means ± SD of three separate experiments. Student's t-test was used to analyze the statistics (*P < 0.05).
