GOLM1 restricts colitis and CAC through maintaining goblet cells and intestinal barrier. a Intestinal permeability was measured by concentration of FITC-dextran in mouse serum (the data are represented as the means ± SEM, n = 5; *P < 0.05, **P < 0.01, ***P < 0.0001; unpaired, two-tailed Student’s t test). b Representative MUC-2 staining of mouse colon sections obtained from mice treated with 2% DSS and sacrificed on indicated days. Scale bars, 100 μm. Quantification is shown in the histogram (the data are represented as the means ± SEM, n = 5; **P < 0.01, ****P < 0.0001; unpaired, two-tailed Student’s t test). c Representative PAS staining of mouse colon sections obtained from Golm1−ΔIEC \and Golm1−flox/flox mice. White arrows indicate innate mucus layer. Scale bars, 20 μm. Quantification is shown in the histogram (the data are represented as the means ± SEM, n = 5; *P < 0.05; unpaired, two-tailed Student’s t test). d Representative CD3 staining of mouse colon sections obtained from mice treated with 2% DSS and sacrificed on indicated days. Scale bars, 100 μm. e Relative mRNA expression levels of inflammatory mediators in the distal colon of DSS-treated mice determined by qRT-PCR. Relative expression reflects the fold change calculated by comparing with the average expression levels in untreated Golm1−flox/flox mice (the data are represented as the means ± SEM, n = 5; P < 0.05, **P < 0.01, ***P < 0.001, ****P < 0.0001; unpaired, two-tailed Student’s t test). f Representative PAS staining of mouse colon sections obtained from DSS-treated mice. Scale bars, 100 μm. Quantification is shown in the histogram (the data are represented as the means ± SEM, n = 5; **P < 0.01; unpaired, two-tailed Student’s t test). g Representative electron microscopy images of goblet cells and epithelial glycocalyx produced by goblet cells between the intestinal microvilli from the colons of Golm1−ΔIEC and Golm1−flox/flox mice. Scale bars, 100 nm (upper panel), 200 nm (lower panel). White arrows indicate mucopolysaccharide matrix (epithelial glycocalyx). h Relative mRNA expression levels of the indicated genes in IECs isolated from Golm1−ΔIEC and Golm1−flox/flox mice determined by qRT-PCR (the data are represented as the means ± SEM, n = 5; *P < 0.05, **P < 0.01; unpaired, two-tailed Student’s t test)