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The role of microRNAs (miRNA\u2019s or miR\u2019s) has also been demonstrated in the last two decades in the pathogenesis of IBD and in the regulation of intestinal TJ barrier function. MiRNAs are noncoding regulators of gene expression at the posttranscription level that have an essential role in targeting transcripts encoding proteins of intestinal TJs and their regulators. Many miRNAs have been reported to regulate or deregulate the TJ proteins responsible for the intestinal barrier integrity and intestinal permeability. Many of those miRNAs have been reported to have essential roles in the pathogenesis of IBD. In this mini-review, we summarize the results of studies in the last three years that implicate miRNAs in the defective TJ barrier in relation to IBD. 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