MUC13 and Chronic colitis: Differences in mRNA expression of cell polarity subunits were only observed for Scrib and aPkcz after the third cycle of DSS administration in both wildtype and Muc13−/− mice whereas expression of Ceacam 1, and Tlr4 mRNA was found to be significantly altered upon chronic colitis (Figure 7B and Figures S2 and S3).