mRNA expression of genes involved in bile acid trafficking (WT, n =5; Mdr2 -/-, n =10; WT + DSS, n =7; Mdr2 -/- +DSS, n =12); one-way ANOVA with Bonferroni’s multiple comparison test ( Oatp2 : WT vs WT + DSS, 95% CI 0.3657–0.8851, P < 0.0001; Mdr2 -/- vs Mdr2 -/- +DSS, 95% CI 0.2581–0.6379, P < 0.0001; Mrp2 : WT vs WT + DSS, 95% CI 0.1302 to 0.7397, P = 0.0042; Mdr2 -/- vs Mdr2 -/- +DSS, 95% CI 0.0725–0.5182, P = 0.0078); Kruskal-Wallis test with Dunn’s multiple comparison test ( Ntcp : WT vs Mdr2 -/-, P = 0.0361; Mdr2 -/- vs Mdr2 -/- +DSS, P = 0.0384; Bsep : Mdr2 -/- vs Mdr2 -/- +DSS, P = 0.0051).