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Effect of Bifidobacterium strains on (A) zonula occludens-1 mRNA expression (B) and occludin mRNA expression in lipopolysaccharide (LPS)-treated Caco-2 cells. Each value is expressed as the mean ± SEM of three independent experiments. *p < 0.05 and **p < 0.01 compared with LPS-treated. ##p < 0.01 compared with untreated control.
