AOM/DSS (azoxymethane/dextran sulfate sodium)-treated Nudt7−/− mice increases the possibility of CRC development. (A) Mice were treated with AOM/DSS and polyp number was counted. Scale bars: 2 cm. (B,C) Immunohistochemistry with hematoxylin and eosin (H&E), Ki67, F4/80, LY6G, NUDT7, ACOX1, and SCD1 (n = 4) and positive cells were counted for every 100 cells in 3 different fields at 100× magnification in Nudt7+/+ and Nudt7−/− colons treated with AOM/DSS. Results are representative of at least 3 independent experiments. Scale bars: 200 μm. (D,E) Transcriptional levels of proliferation and inflammatory marker genes and KrasG12D target genes in Nudt7+/+ and Nudt7−/− colons treated with AOM/DSS. Rn18s was used as an endogenous control. Results are representative of at least 3 independent experiments. Values are means + SD. An unpaired Student’s t-test was used for statistical analysis. * p ≤ 0.01, ** p < 0.01, *** p < 0.01, **** p < 0.0001.