Amelioration of radiation-induced injury to ileum in wild-type (WT) and DNase I knockout (KO) mice treated with or without Zn-DIPS. Panel A: Representative images of the radiation-induced DNA fragmentation (TUNEL, green staining) and reduced cell numbers (DAPI, blue color) in villi and crypts. Scale bar 20 μm. Quantification of TUNEL (panels B, D, F) and cell numbers (panels C, E, G) was performed in the epithelial (panels B, C) and stromal (panels D, E) villi and in the crypt part of the intestine (panels F, G). *P < 0.05 compared to control mice of the same genotype, #P < 0.05 compared to irradiated wild-type mice for the same time/treatment, ¶P < 0.05 compared to irradiated mouse of the same genotype at 16 h. n = 6–12 per group.