NF-κB inhibition could reduce irradiation induced upregulation of TGF-β1. A, protein level of NF-κB/p65 in different treatment groups detected by western blot. B, Protein level of TGF-β1 in different treatment groups detected by western blot. Data are expressed as the mean ± SD (n=5). *p< 0.05, **p<0.01, ***p<0.001.